CN110939425A

CN110939425A - Alternate mining method and device for horizontal well pattern by reverse-looking seven-point method

Info

Publication number: CN110939425A
Application number: CN201911126933.4A
Authority: CN
Inventors: 宋新民; 李勇; 赵丽敏; 王舒; 孙亮
Original assignee: Petrochina Co Ltd
Current assignee: Petrochina Co Ltd
Priority date: 2019-11-18
Filing date: 2019-11-18
Publication date: 2020-03-31

Abstract

The invention provides a vision reverse seven-point method alternate mining method and a device for facing a horizontal well pattern, wherein the method comprises the following steps: controlling a horizontal well pattern to execute a first oil exploitation step in a first operation period; controlling the horizontal well pattern to execute a second oil exploitation step in a second operation period; the first oil exploitation step comprises the steps of closing the odd-numbered rows of water injection wells, increasing the water injection amount of the even-numbered rows of water injection wells, reducing the yield of the even-numbered rows of oil exploitation wells and increasing the yield of the odd-numbered rows of oil exploitation wells; the second oil exploitation step comprises closing the even-numbered rows of water injection wells and increasing the water injection amount of the odd-numbered rows of water injection wells, and reducing the yield of the odd-numbered rows of oil exploitation wells and increasing the yield of the even-numbered rows of oil exploitation wells; the first oil producing step and the second oil producing step are alternately performed. The device is used for executing the method. The apparent-inverse seven-point method alternate mining method and device for the well pattern of the horizontal well, provided by the embodiment of the invention, can improve the oil field recovery rate.

Description

Alternate mining method and device for horizontal well pattern by reverse-looking seven-point method

Technical Field

The invention relates to the technical field of oil exploitation, in particular to a visual-inverse seven-point method alternate exploitation method and device for a horizontal well pattern.

Background

In recent years, horizontal well patterns have been widely developed and applied in the field of oil reservoir development. Compared with a vertical well, the horizontal well can greatly increase the contact area between the well and an oil reservoir, thereby increasing an oil drainage area and improving the yield and the recovery ratio.

When the horizontal well pattern is used for water injection, a linear opposite or staggered well pattern deployment mode is mostly adopted. The linear opposite well pattern injection and production flow line mainly takes a vertical horizontal section as a main part, a dominant flow channel is easily generated between the water injection well and the oil production well, and the oil production well can have the phenomena of rapid water breakthrough, rapid water content rise after water breakthrough, ineffective circulation of injected water and the like. Meanwhile, the water absorption difference exists at the finger end of the water injection well, the liquid production difference also exists at the finger end of the oil production well, so that the horizontal section of the oil production well is subjected to strip-shaped water logging, and a large amount of residual oil which is not effectively affected also exists at the finger end of the horizontal well. At present, the research on horizontal well water injection development at home and abroad focuses on theoretical research on the aspects of horizontal well exploitation mechanism, capacity prediction, injection and production parameter optimization and the like, and focuses on research on water injection development technology for well pattern deployment at the initial development stage and horizontal well-vertical well combined well patterns. Especially for old oil fields which have been exploited for many years by means of horizontal wells, these measures have a limited effect on the improvement of the waterflooding development effect, whereas adjustment by means of well pattern encryption requires a large investment in economic costs. Therefore, how to improve the water injection development effect by using the existing horizontal well pattern is a technical problem to be solved urgently.

Disclosure of Invention

Aiming at the problems in the prior art, the embodiment of the invention provides a visual-inverse seven-point method alternate mining method and device for a horizontal well pattern, which can at least partially solve the problems in the prior art.

On one hand, the invention provides a vision reverse seven-point method alternate mining method for a well pattern of a horizontal well, which comprises the following steps:

controlling a horizontal well pattern to execute a first oil exploitation step in a first operation period; the horizontal well pattern is preset and comprises at least three rows and three columns of injection and production wells;

controlling the horizontal well pattern to perform a second oil production step in a second operation period; alternatively, the first and second electrodes may be,

controlling the horizontal well pattern to perform the second oil production step during the first operational period;

controlling the horizontal well pattern to perform the first oil production step during the second operational period;

the first oil extraction step comprises the steps of closing the odd-numbered rows of water injection wells and increasing the water injection amount of the even-numbered rows of water injection wells, and reducing the yield of the even-numbered rows of oil extraction wells and increasing the yield of the odd-numbered rows of oil extraction wells; the second oil extraction step comprises closing the even-numbered rows of water injection wells and increasing the water injection amount of the odd-numbered rows of water injection wells, and reducing the yield of the odd-numbered rows of oil production wells and increasing the yield of the even-numbered rows of oil production wells; the first oil producing step and the second oil producing step are alternately performed.

On the other hand, the invention provides a visual-inverse seven-point method alternate mining device for a well pattern of a horizontal well, which comprises the following components:

the first control unit is used for controlling the horizontal well pattern to execute a first oil exploitation step in a first operation period; the horizontal well pattern is preset and comprises at least three rows and three columns of injection and production wells;

the second control unit is used for controlling the horizontal well pattern to execute a second oil exploitation step in a second operation period; alternatively, the first and second electrodes may be,

a third control unit for controlling the horizontal well pattern to perform the second oil production step during the first operation period;

a fourth control unit for controlling the horizontal well pattern to perform the first oil producing step during the second operation period;

In another aspect, the present invention provides an electronic device, which includes a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the steps of the pseudo-seven-spot alternating mining method for a well pattern of a horizontal well according to any of the above embodiments.

In yet another aspect, the present invention provides a computer readable storage medium having stored thereon a computer program which, when executed by a processor, performs the steps of the pseudo-seven-spot alternate production method for a horizontal well pattern as described in any of the above embodiments.

The invention provides a method and a device for alternately exploiting a horizontal well network by a view-reversed seven-point method, which are opposite to the horizontal well network, wherein the horizontal well network is controlled to execute a first oil exploiting step in a first operation period, then the horizontal well network is controlled to execute a second oil exploiting step in a second operation period, or the horizontal well network is controlled to execute the second oil exploiting step in the first operation period, then the horizontal well network is controlled to execute the first oil exploiting step in the second operation period, the first oil exploiting step comprises closing water injection wells of odd columns and lifting water injection wells of even columns, the yield of oil exploitation wells of even columns is reduced and the yield of oil exploitation wells of odd columns is lifted, the second oil exploiting step comprises closing water injection wells of even columns and lifting water injection wells of odd columns, the yield of oil exploitation wells of odd columns is reduced and the yield of oil exploitation wells of even columns is lifted, and the first oil exploiting step and the second oil exploiting step are alternately executed, through the adjustment to water injection well and oil recovery well in first oil exploitation step and the second oil exploitation step, can increase notes production well distance to make the volume grow, the flow of notes production line swept and displacement direction change, can avoid the formation of dominant passageway, effectively improve the injected water utilization ratio of horizontal well pattern, improve the sweep coefficient, be favorable to the exploitation to the residual oil, improved the oil field recovery ratio.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts. In the drawings:

fig. 1 is a schematic flow chart of an apparent reverse seven-point alternate mining method for facing a horizontal well pattern according to an embodiment of the present invention.

Fig. 2 is a schematic structural diagram of a horizontal well pattern provided by an embodiment of the present invention.

FIG. 3 is a schematic view of the injection and production flow lines facing a horizontal well pattern during a first operational cycle in accordance with an embodiment of the present invention.

FIG. 4 is a schematic view of the injection and production flow lines facing a horizontal well pattern during a second operational cycle in accordance with an embodiment of the present invention.

Fig. 5 is a schematic flow chart of an apparent reverse seven-point alternate production method for facing a horizontal well pattern according to another embodiment of the present invention.

FIG. 6 is a comparison of oil production for a high water well group provided by an embodiment of the present invention.

Fig. 7 is a schematic structural diagram of an alternative production apparatus using a reverse seven-point method facing a horizontal well pattern according to an embodiment of the present invention.

Fig. 8 is a schematic structural diagram of an alternative production apparatus using a reverse seven point method according to another embodiment of the present invention.

Fig. 9 is a schematic physical structure diagram of an electronic device according to an embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the embodiments of the present invention are further described in detail below with reference to the accompanying drawings. The exemplary embodiments and descriptions of the present invention are provided to explain the present invention, but not to limit the present invention. It should be noted that the embodiments and features of the embodiments in the present application may be arbitrarily combined with each other without conflict.

In order to facilitate understanding of the technical solutions provided in the present application, the following briefly describes the research background of the technical solutions in the present application. Generally, the vertical well pattern adjustment means are various, and the water injection development effect of the vertical well pattern can be improved through a series of means such as hole patching, water plugging and profile control, but the horizontal well pattern is very limited relative to the vertical well pattern adjustment means, and the effect is more limited. Therefore, the embodiment of the invention provides a vision reverse seven-point method alternate mining method for a horizontal well pattern, which can obviously improve the water injection development effect. Especially for old oil fields which have been developed for a certain period of time, the oil yield can be improved, the comprehensive water content can be reduced without adding new injection and production wells, and the oil exploitation cost is reduced. The execution main body of the apparent reverse seven-point method alternate mining method facing the horizontal well pattern provided by the embodiment of the invention can comprise but is not limited to control equipment facing the horizontal well pattern.

Fig. 1 is a schematic flow chart of an apparent-reflection seven-point method alternate mining method for a horizontal well pattern according to an embodiment of the present invention, and as shown in fig. 1, the apparent-reflection seven-point method alternate mining method for the horizontal well pattern according to the embodiment of the present invention includes:

s101, in a first operation period, controlling a horizontal well pattern to execute a first oil exploitation step, wherein the first oil exploitation step comprises closing odd-numbered rows of water injection wells and increasing the water injection amount of even-numbered rows of water injection wells, and reducing the yield of even-numbered rows of oil exploitation wells and increasing the yield of odd-numbered rows of oil exploitation wells; the horizontal well pattern is preset and comprises at least three rows and three columns of injection and production wells;

specifically, in a first operation period, controlling the horizontal well pattern to execute a first oil exploitation step, namely closing the water injection amount of the odd-numbered columns of the horizontal well pattern and lifting the water injection amount of the even-numbered columns of the horizontal well pattern, and reducing the yield of the even-numbered columns of the horizontal well pattern and lifting the yield of the odd-numbered columns of the horizontal well pattern. The horizontal well pattern is preset and comprises at least three rows and three columns of injection and production wells, wherein the injection and production wells refer to a water injection well and a production well. The quantity of the water injection quantity of the even-numbered rows of water injection wells is set according to the actual situation, and the embodiment of the invention is not limited. The reduction of the yield of the production wells in the even rows and the increase of the yield of the production wells in the odd rows are set according to actual conditions, and the embodiment of the invention is not limited. Wherein, the horizontal well pattern is a linear opposite well pattern.

The horizontal well pattern is a horizontal well linear injection and production well group which is suitable for performing well pattern alternate water injection and is selected by performing water injection analysis and screening on the existing injection and production well group based on geological knowledge, production dynamic analysis knowledge and the like. The selection principle of the horizontal well pattern can comprise the following steps: (1) the horizontal well pattern comprises at least three rows and three columns of injection and production wells, so that the implementation effect of alternate water injection of the well pattern can be ensured; (2) after the horizontal well pattern is subjected to water injection development for a long time, the comprehensive water content of the injection and production well is high, and the development effect is difficult to further improve through injection and production parameter optimization; (3) the horizontal well pattern has low extraction degree, a large amount of residual oil enrichment areas exist, and the potential of further mining potential and improving recovery ratio is realized; (4) the injection capacity of the water injection well of the horizontal well pattern can be improved, and the requirement of the apparent reverse seven-point method alternate mining method for the horizontal well pattern on improving the water injection amount of the water injection well can be met.

For example, fig. 2 is a schematic structural diagram of a horizontal well pattern provided in an embodiment of the present invention, and as shown in fig. 2, the horizontal well pattern includes four rows and five columns of injection wells, the 1 st row and the 3 rd row are horizontal production wells, the 2 nd row and the 4 th row are horizontal injection wells, each column includes two injection wells and two production wells, and the injection wells or the production wells in each row are linearly arranged. As can be seen from fig. 2, in the prior art oil exploitation method, the injected water of the water injection well flows from the water injection well to the oil production well, and the direction of the injection and production flow line is mainly perpendicular to the horizontal section of the water injection well.

For example, fig. 3 is a schematic view of an injection and production flow line of a horizontal well network in a first operation period, as shown in fig. 3, water injection wells in the 1 st, 3 rd and 5 th rows are closed, water injection rates of the water injection wells in the 2 nd and 4 th rows are increased, the water injection rates of the water injection wells in the 2 nd and 4 th rows can be increased to be 2-3 times of the previous water injection rate, and the water injection rate of the horizontal well network is made to be consistent with the water injection rate before the apparent reverse seven-point method alternate mining method for facing the horizontal well network provided by the embodiment of the present invention is adopted. The yield of the 2 nd and 4 th oil production wells can be reduced to 0.6-0.8 time of the previous yield, and the yields of the 1 st, 3 rd and 5 th oil production wells can be respectively improved to 1.2-1.4 times of the previous yield, so that the yield of the horizontal well pattern is consistent with the yield before the reversed-looking seven-point method alternate mining method for the horizontal well pattern provided by the embodiment of the invention is adopted. Through the adjustment, the original flow direction of the injected water of the horizontal well pattern is changed, and as shown in fig. 3, the injected water of the 2 nd row and 2 nd column water injection wells of the horizontal well pattern is displaced to 6 surrounding oil production wells to form a reversed-looking seven-point well pattern, namely one water injection well corresponds to six surrounding oil production wells. The injection and production flow line between the water injection well which is not closed and the production well in the column direction of the water injection well is mainly perpendicular to the horizontal section direction of the water injection well, and a new injection and production flow line with a certain included angle with the horizontal section direction of the water injection well is generated between the water injection well which is not closed and the production wells on two sides of the column of the water injection well, so that the original injection and production flow line direction of the horizontal well network is changed, namely the original injection and production flow line directions of the production wells in the 1 st column, the 3 rd column and the 5 th column are changed, the residual oil which cannot be used by the heel end or the finger end of the injection and production well of the horizontal well network is well swept, the sweep coefficient is improved, and the oil field recovery rate is improved.

S102, in a second operation period, controlling the horizontal well pattern to execute a second oil exploitation step, wherein the second oil exploitation step comprises closing the even-numbered rows of water injection wells and increasing the water injection amount of the odd-numbered rows of water injection wells, and reducing the yield of the odd-numbered rows of oil exploitation wells and increasing the yield of the even-numbered rows of oil exploitation wells; the first oil producing step and the second oil producing step are alternately performed.

Specifically, in a second operation period, the horizontal well pattern is controlled to execute a second oil exploitation step, namely the even-numbered rows of water injection wells are closed, the water injection amount of the odd-numbered rows of water injection wells is increased, and the yield of the odd-numbered rows of oil exploitation wells is reduced and the yield of the even-numbered rows of oil exploitation wells is increased. After the execution of the second operation period is finished, the first operation period is repeated, the horizontal well pattern is controlled to execute a first oil exploitation step, then the second operation period is repeated, the horizontal well pattern is controlled to execute a second oil exploitation step, and the first oil exploitation step and the second oil exploitation step are executed alternately. The amount of water injection quantity improvement of the odd-numbered rows of water injection wells is set according to actual conditions, and the embodiment of the invention is not limited. The reduction of the yield of the odd-numbered rows of oil production wells and the increase of the yield of the even-numbered rows of oil production wells are set according to actual conditions, and the embodiment of the invention is not limited.

For example, fig. 4 is a schematic view of an injection and production flow line of the horizontal well network in a second operation period, as shown in fig. 4, the 2 nd and 4 th rows of water injection wells are closed, the water injection rates of the 1 st, 3 rd and 5 th rows of water injection wells are increased, the water injection rates of the 1 st, 3 rd and 5 th rows of water injection wells can be increased to 1.5-2 times of the previous water injection rate, and the water injection rate of the horizontal well network is made to be consistent with the water injection rate before the reversed-view seven-point method alternate mining method for the horizontal well network provided by the embodiment of the present invention is adopted; the yield of the 1 st, 3 rd and 5 th oil production wells can be reduced to 0.6-0.8 times of the previous yield of the 1 st, 3 rd and 5 th oil production wells, the yield of the 2 nd and 4 th oil production wells can be improved to 1.2-1.4 times of the previous yield, and the yield of the horizontal well pattern is consistent with the yield before the reversed-looking seven-point method alternative production method for the horizontal well pattern provided by the embodiment of the invention is adopted. Through the adjustment, the original flow direction of the injected water of the horizontal well pattern is changed again, and as shown in fig. 4, the injected water of the 2 nd row and 3 rd row water injection wells is displaced to 6 surrounding oil production wells to form a reversed-view seven-point well pattern, namely one water injection well corresponds to six surrounding oil production wells. The injection and production flow line between the water injection well which is not closed and the production well in the column direction of the water injection well is mainly perpendicular to the horizontal section direction of the water injection well, a new injection and production flow line with a certain included angle with the horizontal section direction of the water injection well is generated between the water injection well which is not closed and the production wells on two sides of the column of the water injection well, so that the original injection and production flow line direction of the horizontal well network is changed, the original injection and production flow line directions of the 2 nd and 4 th columns of production wells are changed, the residual oil which cannot be used by the heel end or the finger end of the injection and production well of the horizontal well network is well affected, the sweep coefficient is improved, and the oil field recovery rate is improved.

As can be seen from fig. 3 and 4, the flow direction of the injected water is changed between the two adjacent columns of injection and production wells in the first operation period and the second operation period, for example, between the injection and production wells in the 1 st column and the 2 nd column, in the first operation period, the injected water is displaced from right to left, and in the second operation period, the injected water is displaced from left to right, so that while the residual oil is ensured to be sufficiently and continuously displaced, the injected water is prevented from being flushed along the same channel for a long time to form an advantageous channel, thereby avoiding the ineffective circulation of the injected water in the formation, further improving the sweep coefficient, and further improving the oil field recovery ratio.

The alternating production method of the apparent reverse seven-point method for facing the horizontal well network provided by the embodiment of the invention comprises the steps of controlling the horizontal well network to execute a first oil production step in a first operation period, then controlling the horizontal well network to execute a second oil production step in a second operation period, wherein the first oil production step comprises closing water injection wells in odd columns and increasing the water injection amount of the water injection wells in even columns, and reducing the yield of the oil production wells in even columns and increasing the yield of the oil production wells in odd columns, the second oil production step comprises closing water injection wells in even columns and increasing the water injection amount of the water injection wells in odd columns, and reducing the yield of the oil production wells in odd columns and increasing the yield of the oil production wells in even columns, the first oil production step and the second oil production step are executed alternately, and the distance for the injected water to flow through between the water injection wells and the oil production wells can be increased through the adjustment of the water injection wells and the oil production wells in the first oil production step and the second, and the swept volume of the injection and production flow line is enlarged, and the flow and displacement directions are changed, so that the formation of an advantageous channel can be avoided, the utilization rate of injected water of a horizontal well pattern is effectively improved, the swept coefficient is improved, the exploitation of residual oil is facilitated, and the oil field recovery ratio is improved.

Fig. 5 is a schematic flow chart of an apparent inverse seven-point method alternate mining method for a well pattern of a horizontal well according to another embodiment of the present invention, and as shown in fig. 5, based on the foregoing embodiments, further, the apparent inverse seven-point method alternate mining method for a well pattern of a horizontal well according to an embodiment of the present invention includes:

s501, in the first operation period, controlling a horizontal well pattern to execute a second oil exploitation step, wherein the second oil exploitation step comprises closing the even-numbered rows of water injection wells and increasing the water injection amount of the odd-numbered rows of water injection wells, and reducing the yield of the odd-numbered rows of oil exploitation wells and increasing the yield of the even-numbered rows of oil exploitation wells; the horizontal well pattern is preset and comprises at least three rows and three columns of injection and production wells;

specifically, in the first operation period, the horizontal well pattern is controlled to execute a second oil exploitation step, namely the water injection wells in the even rows are closed, the water injection amount of the water injection wells in the odd rows is increased, and the yield of the oil exploitation wells in the odd rows is reduced and the yield of the oil exploitation wells in the even rows is increased. The specific implementation process of step S501 is similar to that of step S102, and is not described here again.

S502, in the second operation period, controlling the horizontal well pattern to execute the first oil exploitation step, wherein the first oil exploitation step comprises closing the water injection wells in the odd columns and increasing the water injection amount of the water injection wells in the even columns, and reducing the yield of the oil exploitation wells in the even columns and increasing the yield of the oil exploitation wells in the odd columns; the first oil producing step and the second oil producing step are alternately performed.

Specifically, in the second operation period, the horizontal well pattern is controlled to execute a first oil exploitation step, namely the water injection amount of the odd-numbered columns of water injection wells of the horizontal well pattern is closed and the water injection amount of the even-numbered columns of water injection wells of the horizontal well pattern is increased, and the yield of the even-numbered columns of oil exploitation wells of the horizontal well pattern is reduced and the yield of the odd-numbered columns of oil exploitation wells of the horizontal well pattern is increased. After the execution of the second operation period is finished, the first operation period is repeated, the horizontal well pattern is controlled to execute a first oil exploitation step, then the second operation period is repeated, the horizontal well pattern is controlled to execute a second oil exploitation step, and the first oil exploitation step and the second oil exploitation step are executed alternately. The specific implementation process of step S502 is similar to that of step S101, and is not described herein again.

The alternating production method of the apparent reverse seven-point method for facing the horizontal well network provided by the embodiment of the invention comprises the steps of controlling the horizontal well network to execute a second oil production step in a first operation period, then controlling the horizontal well network to execute a first oil production step in a second operation period, wherein the first oil production step comprises closing water injection wells of odd columns and increasing the water injection amount of the water injection wells of even columns, reducing the yield of the oil production wells of even columns and increasing the yield of the oil production wells of odd columns, the second oil production step comprises closing water injection wells of even columns and increasing the water injection amount of the water injection wells of odd columns, reducing the yield of the oil production wells of odd columns and increasing the yield of the oil production wells of even columns, the first oil production step and the second oil production step are executed alternately, and the distance of flowing through of injected water between the water injection wells and the oil production wells can be increased through the adjustment of the water injection wells and the oil production wells in the first oil production step and the second oil production step, and the swept volume of the injection and production flow line is enlarged, and the flow and displacement directions are changed, so that the formation of an advantageous channel can be avoided, the utilization rate of injected water of a horizontal well pattern is effectively improved, the swept coefficient is improved, the exploitation of residual oil is facilitated, and the oil field recovery ratio is improved.

On the basis of the foregoing embodiments, further, the increasing the water injection amount of the even-numbered rows of water injection wells includes:

and increasing the water injection amount of the even-numbered rows of water injection wells to 1.5-2.5 times of the previous water injection amount.

Specifically, when the first oil extraction step is performed, the water injection amount of the even-numbered rows of water injection wells can be increased to 1.5-2.5 times of the water injection amount before the even-numbered rows of water injection wells. When the water injection amount of the even-numbered rows of water injection wells is increased, the water injection amount of the horizontal well network after the apparent reverse seven-point method alternate mining method for the horizontal well network provided by the embodiment of the invention is adopted can be consistent with the previous water injection amount.

On the basis of the above embodiments, further, the reducing the production rate of the production wells in the even rows and the increasing the production rate of the production wells in the odd rows includes:

reducing the yield of the oil production wells in the even rows to 0.6-0.8 times of the previous yield, and improving the yield of the oil production wells in the odd rows to 1.2-1.4 times of the previous yield.

Specifically, when the first oil producing step is performed, the production rate of the even-column oil producing wells may be reduced to 0.6 to 0.8 times the previous production rate of the even-column oil producing wells, and the production rate of the odd-column oil producing wells may be increased to 1.2 to 1.4 times the previous production rate of the odd-column oil producing wells. When the yield of the even-numbered rows of oil production wells and the yield of the odd-numbered rows of oil production wells are adjusted, the yield of the horizontal well pattern after the alternating production method of the seven-point-on-reverse method for directly facing the horizontal well pattern provided by the embodiment of the invention is consistent with the previous yield. In addition, by reducing the yield of the oil production wells in the even rows and improving the yield of the oil production wells in the odd rows, more injected water can flow to the oil production wells in the odd rows from the water injection wells in the even rows, the injection and production flow direction is changed, and the residual oil is favorably exploited.

On the basis of the foregoing embodiments, further, the increasing the water injection amount of the odd-numbered water injection wells includes:

and increasing the water injection amount of the odd-number rows of water injection wells to 1.5-2.5 times of the previous water injection amount.

Specifically, when the second oil extraction step is performed, the water injection amount of the odd-numbered columns of water injection wells can be increased to 1.5-2 times of the water injection amount before the odd-numbered columns of water injection wells. When the water injection amount of the odd-numbered rows of water injection wells is increased, the water injection amount of the horizontal well pattern after the apparent reverse seven-point method alternate mining method for the horizontal well pattern provided by the embodiment of the invention is consistent with the previous water injection amount.

On the basis of the above embodiments, further, the reducing the production rate of the production wells in the odd columns and the increasing the production rate of the production wells in the even columns includes:

reducing the yield of the odd-numbered rows of oil production wells to 0.6-0.8 times of the previous yield, and improving the yield of the even-numbered rows of oil production wells to 1.2-1.4 times of the previous yield.

Specifically, when the second oil producing step is performed, the production rate of the odd-numbered rows of oil producing wells may be reduced to 0.6 to 0.8 times the previous production rate of the odd-numbered rows of oil producing wells, and the production rate of the even-numbered rows of oil producing wells may be increased to 1.2 to 1.4 times the previous production rate of the even-numbered rows of oil producing wells. When the yield of the odd-numbered rows of oil production wells and the yield of the even-numbered rows of oil production wells are adjusted, the yield of the horizontal well pattern after the apparent reverse seven-point method alternate production method for directly facing the horizontal well pattern provided by the embodiment of the invention is consistent with the previous yield. In addition, by reducing the yield of the odd-numbered rows of oil production wells and improving the yield of the even-numbered rows of oil production wells, more injected water can flow from the odd-numbered rows of water injection wells to the even-numbered rows of oil production wells, the injection and production flow direction is changed, and the residual oil is favorably exploited.

On the basis of the above embodiments, further, the first operation period and the second operation period are equal, the first operation period is greater than or equal to 30 days and less than or equal to 180 days, and the formation pressure is maintained stable in the alternate water injection period formed by the first operation period and the second operation period.

Specifically, the first operating period and the second operating period may be set to be equal to each other, and the first operating period is greater than or equal to 30 days and less than or equal to 180 days, and the setting is performed according to an actual situation, which is not limited in the embodiment of the present invention. The first operation period and the second operation period form an alternate water injection period, in the alternate water injection period, the formation pressure needs to be maintained to be stable, and the formation pressure can be maintained to be stable by keeping the injection-production ratio of the horizontal well pattern to be the same as the injection-production ratio before the reverse-looking seven-point method alternate production method for facing the horizontal well pattern provided by the embodiment of the invention is adopted.

The apparent reverse seven-point method alternate mining method for the horizontal well pattern provided by the embodiment of the invention has been tested in the water injection development of a certain large carbonate reservoir, and the specific implementation process is explained below.

The large carbonate reservoir is well arranged and is opposite to a horizontal well pattern, the length of the horizontal well is 800m, the row spacing of the horizontal well is 300m, the well spacing is 100m, and water injection development within 6 years is carried out at present. The oil production wells have been subjected to water breakthrough completely, the water content rapidly rises after water breakthrough, the water content of most oil production wells is higher than 60%, and the annual yield reduction rate reaches more than 30%. By carrying out streamline numerical simulation on the large carbonate reservoir, the fact that after long-term water injection development, an injection and production streamline perpendicular to the horizontal section of the horizontal well and facing to the direction is formed between most of the water injection wells and the oil production well is found, the direction of the injection and production streamline is single, water injection is not fully utilized, the comprehensive water content is high, the overall production degree of the reservoir is still low, a large amount of residual oil exists, and the potential for further mining and improving the oil field recovery ratio is huge.

Through screening, a certain high water-cut well group of the large carbonate reservoir is selected as a horizontal well pattern to implement the apparent-reflection seven-point method alternate mining method for facing the horizontal well pattern provided by the embodiment of the invention. The high water content well group comprises three rows of seven rows of injection and production wells, namely two rows of oil production wells and one row of water injection wells, each row of oil production wells/water injection wells comprises 7 wells, and one row of water injection wells is positioned between the two rows of oil production wells. The horizontal section of the water injection well is basically positioned on the lower small layer, and the horizontal section of the oil production well is positioned on the upper small layer. Before the apparent reverse seven-point method alternate mining method which is over against the horizontal well pattern and is provided by the embodiment of the invention is adopted, the daily average oil production of a certain high water-containing well group is less than 7000 barrels, the mining degree is about 10%, and the water content of each oil well is higher than 60%.

Setting the first operation period and the second operation period to be 30 days, wherein the first operation period and the second operation period are alternately carried out, and the first operation period and the second operation period form an alternate water injection period. And controlling a certain high water-cut well group to execute the first oil exploitation step in the first operation period, namely closing the odd-numbered rows of water injection wells of the certain high water-cut well group, increasing the water injection amount of the even-numbered rows of water injection wells of the certain high water-cut well group to be 1.5-2.5 times of the original water injection amount, reducing the yield of the even-numbered rows of oil exploitation wells of the certain high water-cut well group to be 0.6-0.8 times of the original yield, and increasing the yield of the odd-numbered rows of oil exploitation wells of the certain high water-cut well group to be 1.2-1.4 times of the original yield. And in the second operation period, controlling a certain high water-cut well group to execute the second oil exploitation step, namely closing the even-numbered rows of water injection wells of the certain high water-cut well group and increasing the water injection amount of the odd-numbered rows of water injection wells of the certain high water-cut well group to 1.5-2.5 times of the original water injection amount, reducing the yield of the odd-numbered rows of oil exploitation wells of the certain high water-cut well group to 0.6-0.8 time of the original yield and increasing the yield of the even-numbered rows of oil exploitation wells of the certain high water-cut well group to 1.2-1.4 times of the original yield.

The apparent reflection seven-point method alternate mining method for facing the horizontal well pattern provided by the embodiment of the invention is implemented from 5 months in 2018 for a certain high water-cut well group, and after 5 alternate water injection periods, the water injection development effect of the certain high water-cut well group is obviously improved, and oil and water stabilization and control are realized. Fig. 6 is a comparison diagram of oil exploitation of a high water-cut well group according to an embodiment of the present invention, and as shown in fig. 6, from the field implementation effect, the daily oil yield after the implementation of the seven-point-view-reversed-method alternate exploitation method for a horizontal well pattern according to the embodiment of the present invention is significantly higher than the predicted curve of the daily oil yield (decreasing trend line of daily oil production), and after the implementation of the seven-point-view-reversed-method alternate exploitation method for a horizontal well pattern according to the embodiment of the present invention, the daily oil yield is increased by more than 5000 barrels per day, the comprehensive water cut is lower than the increasing trend line of the water cut, and the comprehensive water cut is reduced by more than 15%, and the optimized water injection effect is significant.

It can be understood that the apparent reverse seven-point method alternate mining method for the horizontal well pattern provided by the embodiment of the invention can be tried before the apparent reverse seven-point method alternate mining method for the horizontal well pattern provided by the embodiment of the invention is formally put into use. In the trial process, after a first operation period and a second operation period are finished, the effect of the horizontal well pattern of the apparent inverse seven-point method alternate mining method for the horizontal well pattern, which is provided by the embodiment of the invention, is evaluated, namely the petroleum yield before and after the apparent inverse seven-point method alternate mining method for the horizontal well pattern, which is provided by the embodiment of the invention, is compared. If the oil yield of three continuous alternate water injection periods is higher than that of the previous oil yield, the apparent reverse seven-point method alternate mining method for facing the horizontal well pattern provided by the embodiment of the invention has better effect and can be implemented. According to the actual conditions, the water injection amount of the water injection well, the yield of the oil production well, the first operation period and the second operation period can be adjusted, so that a better development effect is obtained. The adjustment of the water injection amount of the water injection well, the yield of the oil production well and the first operation period and the second operation period can be carried out before practical application, and the parameters are continuously adjusted by combining with the production dynamic analysis of a practical horizontal well pattern in the specific implementation process. The apparent reverse seven-point method alternate mining method for facing the horizontal well pattern provided by the embodiment of the invention is suitable for both continental facies or marine facies sandstone reservoirs and carbonate reservoirs.

Fig. 7 is a schematic structural diagram of an apparent inverse seven-point alternating production apparatus facing a horizontal well pattern according to an embodiment of the present invention, and as shown in fig. 7, the apparent inverse seven-point alternating production apparatus facing a horizontal well pattern according to an embodiment of the present invention includes a first control unit 701 and a second control unit 702, where:

the first control unit 701 is used for controlling the horizontal well pattern to execute a first oil exploitation step in a first operation period, wherein the first oil exploitation step comprises closing the water injection wells of the odd-numbered rows and increasing the water injection amount of the water injection wells of the even-numbered rows, and reducing the yield of the oil exploitation wells of the even-numbered rows and increasing the yield of the oil exploitation wells of the odd-numbered rows; the horizontal well pattern is preset and comprises at least three rows and three columns of injection and production wells; the second control unit 702 is configured to control the horizontal well pattern to perform a second oil production step in a second operation cycle, where the second oil production step includes closing the even-numbered rows of water injection wells and increasing the water injection amount of the odd-numbered rows of water injection wells, and decreasing the production rate of the odd-numbered rows of oil production wells and increasing the production rate of the even-numbered rows of oil production wells; the first oil producing step and the second oil producing step are alternately performed.

Specifically, in a first operation cycle, the first control unit 701 controls the horizontal well pattern to perform a first oil exploitation step, that is, the water injection rates of the odd-numbered rows of water injection wells of the horizontal well pattern are closed and the water injection rates of the even-numbered rows of water injection wells of the horizontal well pattern are increased, and the production of the even-numbered rows of oil exploitation wells of the horizontal well pattern is reduced and the production of the odd-numbered rows of oil exploitation wells of the horizontal well pattern is increased. The horizontal well pattern is preset and comprises at least three rows and three columns of injection and production wells, wherein the injection and production wells refer to a water injection well and a production well. The quantity of the water injection quantity of the even-numbered rows of water injection wells is set according to the actual situation, and the embodiment of the invention is not limited. The reduction of the yield of the production wells in the even rows and the increase of the yield of the production wells in the odd rows are set according to actual conditions, and the embodiment of the invention is not limited.

In a second operation cycle, the second control unit 702 controls the horizontal well pattern to perform a second oil production step, i.e. closing the even-numbered rows of water injection wells and increasing the water injection amount of the odd-numbered rows of water injection wells, and decreasing the production of the odd-numbered rows of oil production wells and increasing the production of the even-numbered rows of oil production wells. After the execution of the second operation period is finished, the first operation period is repeated, the horizontal well pattern is controlled to execute a first oil exploitation step, then the second operation period is repeated, the horizontal well pattern is controlled to execute a second oil exploitation step, and the first oil exploitation step and the second oil exploitation step are executed alternately. The amount of water injection quantity improvement of the odd-numbered rows of water injection wells is set according to actual conditions, and the embodiment of the invention is not limited. The reduction of the yield of the odd-numbered rows of oil production wells and the increase of the yield of the even-numbered rows of oil production wells are set according to actual conditions, and the embodiment of the invention is not limited.

The alternating production device of the apparent-inverse seven-point method for facing the horizontal well network provided by the embodiment of the invention controls the horizontal well network to execute the first oil production step in the first operation period, then controls the horizontal well network to execute the second oil production step in the second operation period, wherein the first oil production step comprises closing the water injection wells of odd columns and increasing the water injection amount of the water injection wells of even columns, and reduces the yield of the oil production wells of even columns and increases the yield of the oil production wells of odd columns, the second oil production step comprises closing the water injection wells of even columns and increasing the water injection amount of the water injection wells of odd columns, and reduces the yield of the oil production wells of odd columns and increases the yield of the oil production wells of even columns, the first oil production step and the second oil production step are executed alternately, and the distance for the injected water to flow through between the water injection wells and the oil production wells can be increased through the adjustment of the water injection wells and the oil production wells in the first oil production step and the second oil, and the swept volume of the injection and production flow line is enlarged, and the flow and displacement directions are changed, so that the formation of an advantageous channel can be avoided, the utilization rate of injected water of a horizontal well pattern is effectively improved, the swept coefficient is improved, the exploitation of residual oil is facilitated, and the oil field recovery ratio is improved.

Fig. 8 is a schematic structural diagram of an apparent inverse seven-point alternating production device facing a horizontal well pattern according to another embodiment of the present invention, and as shown in fig. 8, the apparent inverse seven-point alternating production device facing the horizontal well pattern according to the embodiment of the present invention includes a third control unit 801 and a fourth control unit 802, where:

the third control unit 801 is configured to control the horizontal well pattern to perform the second oil exploitation step in the first operation cycle, where the second oil exploitation step includes closing the even-numbered rows of water injection wells and increasing the water injection amount of the odd-numbered rows of water injection wells, and decreasing the yield of the odd-numbered rows of oil production wells and increasing the yield of the even-numbered rows of oil production wells; the horizontal well pattern is preset and comprises at least three rows and three columns of injection and production wells; the fourth control unit 802 is configured to control the horizontal well pattern to perform the first oil exploitation step in the second operation period, where the first oil exploitation step includes closing the odd-numbered rows of water injection wells and increasing the water injection amount of the even-numbered rows of water injection wells, and decreasing the yield of the even-numbered rows of oil exploitation wells and increasing the yield of the odd-numbered rows of oil exploitation wells; the first oil producing step and the second oil producing step are alternately performed.

Specifically, in the first operation cycle, the third control unit 801 controls the horizontal well pattern to perform a second oil production step, that is, closing the even-numbered rows of water injection wells and increasing the water injection amount of the odd-numbered rows of water injection wells, and decreasing the production of the odd-numbered rows of oil production wells and increasing the production of the even-numbered rows of oil production wells.

In the second operation period, the fourth control unit 802 controls the horizontal well pattern to perform the first oil exploitation step, that is, the water injection amount of the odd-numbered rows of the horizontal well pattern is closed and the water injection amount of the even-numbered rows of the horizontal well pattern is increased, and the yield of the even-numbered rows of the horizontal well pattern is reduced and the yield of the odd-numbered rows of the horizontal well pattern is increased. After the execution of the second operation period is finished, the first operation period is repeated, the horizontal well pattern is controlled to execute a first oil exploitation step, then the second operation period is repeated, the horizontal well pattern is controlled to execute a second oil exploitation step, and the first oil exploitation step and the second oil exploitation step are executed alternately.

The alternating production device of the apparent-inverse seven-point method for facing the horizontal well network provided by the embodiment of the invention controls the horizontal well network to execute the second oil production step in the first operation period, then controls the horizontal well network to execute the first oil production step in the second operation period, wherein the first oil production step comprises closing the water injection wells of the odd-numbered columns and increasing the water injection amount of the water injection wells of the even-numbered columns, and reducing the yield of the oil production wells of the even-numbered columns and increasing the yield of the oil production wells of the odd-numbered columns, the second oil production step comprises closing the water injection wells of the even-numbered columns and increasing the water injection amount of the water injection wells of the odd-numbered columns, and reducing the yield of the oil production wells of the odd-numbered columns and increasing the yield of the oil production wells of the even-numbered columns, the first oil production step and the second oil production step are executed alternately, and the distance of the injected water flowing between the water injection wells and the oil production wells can be increased through the adjustment, and the swept volume of the injection and production flow line is enlarged, and the flow and displacement directions are changed, so that the formation of an advantageous channel can be avoided, the utilization rate of injected water of a horizontal well pattern is effectively improved, the swept coefficient is improved, the exploitation of residual oil is facilitated, and the oil field recovery ratio is improved.

Specifically, when the first oil production step is performed, the first control unit 701 may increase the water injection amount of the even-numbered water injection wells to 1.5 to 2.5 times of the water injection amount before the even-numbered water injection wells. When the water injection amount of the even-numbered rows of water injection wells is increased, the water injection amount of the horizontal well network after the apparent reverse seven-point method alternate mining method for the horizontal well network provided by the embodiment of the invention is adopted can be consistent with the previous water injection amount.

Specifically, the first control unit 701 may reduce the production of the even-column producing wells to 0.6 to 0.8 times the previous production of the even-column producing wells and increase the production of the odd-column producing wells to 1.2 to 1.4 times the previous production of the odd-column producing wells when the first oil producing step is performed. When the yield of the even-numbered rows of oil production wells and the yield of the odd-numbered rows of oil production wells are adjusted, the yield of the horizontal well pattern after the alternating production method of the seven-point-on-reverse method for directly facing the horizontal well pattern provided by the embodiment of the invention is consistent with the previous yield. In addition, by reducing the yield of the oil production wells in the even rows and improving the yield of the oil production wells in the odd rows, more injected water can flow to the oil production wells in the odd rows from the water injection wells in the even rows, the injection and production flow direction is changed, and the residual oil is favorably exploited.

Specifically, when the second oil extraction step is performed, the second control unit 702 may increase the water injection amount of the odd-numbered water injection wells to 1.5 to 2.5 times of the water injection amount before the odd-numbered water injection wells. When the water injection amount of the odd-numbered rows of water injection wells is increased, the water injection amount of the horizontal well pattern after the apparent reverse seven-point method alternate mining method for the horizontal well pattern provided by the embodiment of the invention is consistent with the previous water injection amount.

Specifically, in performing the second oil producing step, the second control unit 702 may decrease the production of the odd-numbered rows of producing wells to 0.6 to 0.8 times the previous production of the odd-numbered rows of producing wells, and increase the production of the even-numbered rows of producing wells to 1.2 to 1.4 times the previous production of the even-numbered rows of producing wells. When the yield of the odd-numbered rows of oil production wells and the yield of the even-numbered rows of oil production wells are adjusted, the yield of the horizontal well pattern after the apparent reverse seven-point method alternate production method for directly facing the horizontal well pattern provided by the embodiment of the invention is consistent with the previous yield. In addition, by reducing the yield of the odd-numbered rows of oil production wells and improving the yield of the even-numbered rows of oil production wells, more injected water can flow from the odd-numbered rows of water injection wells to the even-numbered rows of oil production wells, the injection and production flow direction is changed, and the residual oil is favorably exploited.

The embodiment of the apparatus provided in the embodiment of the present invention may be specifically configured to execute the processing flows of the above method embodiments, and the functions of the apparatus are not described herein again, and refer to the detailed description of the above method embodiments.

Fig. 9 is a schematic physical structure diagram of an electronic device according to an embodiment of the present invention, and as shown in fig. 9, the electronic device may include: a processor (processor)901, a communication Interface (Communications Interface)902, a memory (memory)903 and a communication bus 904, wherein the processor 901, the communication Interface 902 and the memory 903 are communicated with each other through the communication bus 904. The processor 901 may call logic instructions in the memory 903 to perform the following method: controlling a horizontal well pattern to execute a first oil exploitation step in a first operation period; the horizontal well pattern is preset and comprises at least three rows and three columns of injection and production wells; controlling the horizontal well pattern to perform a second oil production step in a second operation period; or, in the first operation period, controlling the horizontal well pattern to perform the second oil production step; controlling the horizontal well pattern to perform the first oil production step during the second operational period; the first oil extraction step comprises the steps of closing the odd-numbered rows of water injection wells and increasing the water injection amount of the even-numbered rows of water injection wells, and reducing the yield of the even-numbered rows of oil extraction wells and increasing the yield of the odd-numbered rows of oil extraction wells; the second oil extraction step comprises closing the even-numbered rows of water injection wells and increasing the water injection amount of the odd-numbered rows of water injection wells, and reducing the yield of the odd-numbered rows of oil production wells and increasing the yield of the even-numbered rows of oil production wells; the first oil producing step and the second oil producing step are alternately performed.

In addition, the logic instructions in the memory 903 may be implemented in a software functional unit and stored in a computer readable storage medium when the logic instructions are sold or used as a separate product. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.

The present embodiment discloses a computer program product comprising a computer program stored on a non-transitory computer readable storage medium, the computer program comprising program instructions which, when executed by a computer, enable the computer to perform the method provided by the above-mentioned method embodiments, for example, comprising: controlling a horizontal well pattern to execute a first oil exploitation step in a first operation period; the horizontal well pattern is preset and comprises at least three rows and three columns of injection and production wells; controlling the horizontal well pattern to perform a second oil production step in a second operation period; or, in the first operation period, controlling the horizontal well pattern to perform the second oil production step; controlling the horizontal well pattern to perform the first oil production step during the second operational period; the first oil extraction step comprises the steps of closing the odd-numbered rows of water injection wells and increasing the water injection amount of the even-numbered rows of water injection wells, and reducing the yield of the even-numbered rows of oil extraction wells and increasing the yield of the odd-numbered rows of oil extraction wells; the second oil extraction step comprises closing the even-numbered rows of water injection wells and increasing the water injection amount of the odd-numbered rows of water injection wells, and reducing the yield of the odd-numbered rows of oil production wells and increasing the yield of the even-numbered rows of oil production wells; the first oil producing step and the second oil producing step are alternately performed.

The present embodiment provides a computer-readable storage medium, which stores a computer program, where the computer program causes the computer to execute the method provided by the above method embodiments, for example, the method includes: controlling a horizontal well pattern to execute a first oil exploitation step in a first operation period; the horizontal well pattern is preset and comprises at least three rows and three columns of injection and production wells; controlling the horizontal well pattern to perform a second oil production step in a second operation period; or, in the first operation period, controlling the horizontal well pattern to perform the second oil production step; controlling the horizontal well pattern to perform the first oil production step during the second operational period; the first oil extraction step comprises the steps of closing the odd-numbered rows of water injection wells and increasing the water injection amount of the even-numbered rows of water injection wells, and reducing the yield of the even-numbered rows of oil extraction wells and increasing the yield of the odd-numbered rows of oil extraction wells; the second oil extraction step comprises closing the even-numbered rows of water injection wells and increasing the water injection amount of the odd-numbered rows of water injection wells, and reducing the yield of the odd-numbered rows of oil production wells and increasing the yield of the even-numbered rows of oil production wells; the first oil producing step and the second oil producing step are alternately performed.

As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.

The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

In the description herein, reference to the description of the terms "one embodiment," "a particular embodiment," "some embodiments," "for example," "an example," "a particular example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are only exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims

1. An apparent-reverse seven-point method alternate mining method for a well pattern of a horizontal well is characterized by comprising the following steps of:

2. The method of claim 1, wherein the boosting the water injection rate of the even columns of water injection wells comprises:

3. The method of claim 1, wherein reducing production from production wells in even columns and increasing production from production wells in odd columns comprises:

4. The method of claim 1, wherein the elevating the water injection amount of the odd-numbered columns of water injection wells comprises:

5. The method of claim 1, wherein the reducing production from the odd columns of production wells and the increasing production from the even columns of production wells comprises:

6. The method of any one of claims 1 to 5, wherein the first and second operational periods are equal, wherein the first operational period is greater than or equal to 30 days and less than or equal to 180 days, and wherein a stable formation pressure is maintained during alternating water injection periods comprised by the first and second operational periods.

7. A seven-point-on-reverse-view alternate mining device for a horizontal well pattern is characterized by comprising:

8. The apparatus of claim 7, wherein the boosting the water injection rate of the even columns of water injection wells comprises:

9. The apparatus of claim 7, wherein the reducing production from the production wells in the even columns and increasing production from the production wells in the odd columns comprises:

10. The apparatus of claim 7, wherein the elevating the water injection rate of the odd columns of water injection wells comprises:

11. The apparatus of claim 7, wherein the reducing production from the odd columns of production wells and the increasing production from the even columns of production wells comprises:

12. The apparatus of any one of claims 7 to 11, wherein the first and second operational periods are equal, wherein the first operational period is greater than or equal to 30 days and less than or equal to 180 days, and wherein a stable formation pressure is maintained during alternating water injection periods formed by the first and second operational periods.

13. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, characterized in that the steps of the method of any of claims 1 to 6 are implemented when the computer program is executed by the processor.

14. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the steps of the method of any one of claims 1 to 6.