CN111335870A - Method and device for determining oil gas potential - Google Patents
Method and device for determining oil gas potential Download PDFInfo
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- CN111335870A CN111335870A CN201811555354.7A CN201811555354A CN111335870A CN 111335870 A CN111335870 A CN 111335870A CN 201811555354 A CN201811555354 A CN 201811555354A CN 111335870 A CN111335870 A CN 111335870A
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- 229930195733 hydrocarbon Natural products 0.000 claims description 21
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- E21B47/00—Survey of boreholes or wells
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- E—FIXED CONSTRUCTIONS
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- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
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Abstract
The disclosure relates to a method and a device for determining oil-gas potential, and belongs to the technical field of oil-gas exploration. The method comprises the following steps: acquiring logging information of a plurality of test wells included in a target block; determining a comprehensive histogram of the standard wells of the target block according to the logging information of the plurality of test wells; acquiring seismic data interpretation data of a plurality of target wells to be determined, which are included in the target block; acquiring stratigraphic structure diagrams of the target wells according to the seismic data interpretation data of the target wells, and determining stratigraphic contrast diagrams of the target wells; and determining the oil and gas potential of the plurality of target wells according to the comprehensive histogram of the standard well and the stratigraphic contrast. The stratum contrast chart and the comprehensive histogram of the standard well are obtained through the well logging data and the seismic data interpretation data, and the obtained conclusion is accurate due to clear and definite steps and the fine analysis of the existing data, so that the method can be used for searching the target well with the oil-gas potential.
Description
Technical Field
The disclosure relates to the technical field of oil and gas exploration, in particular to a method and a device for determining oil and gas potential.
Background
In the technical field of oil and gas exploration, for oil and gas fields with complex fault blocks, lithologic traps and complex fissures, the lithologic structure of the oil and gas fields is complex and cannot be known clearly in a short period.
Along with the deep exploration, a large amount of logging information is accumulated, and meanwhile, the knowledge of geological information is further improved due to the development of the technology. In order to make reserve and yield contributions inside and around an oil field, make the oil field develop sustainably, and simultaneously implement high-quality reserves, reserve difficult to coil activities, and put marginal oil fields or oil reservoirs into development, it is necessary to explore the oil and gas potential.
The prior art does not have a systematic working method for finely analyzing the existing data to find missing target wells with oil and gas potential.
Disclosure of Invention
The present disclosure provides a method and apparatus for determining hydrocarbon potential. The technical scheme is as follows.
According to a first aspect of embodiments of the present disclosure, there is provided a method of determining hydrocarbon potential, the method comprising:
acquiring logging information of a plurality of test wells included in a target block, wherein the logging information comprises existing comprehensive logging graphs, logging graphs and logging interpretation electronic data;
determining a comprehensive histogram of a standard well of the target block according to the logging information of the plurality of test wells, wherein the standard well is formed by combining the plurality of test wells;
acquiring seismic data interpretation data of a plurality of target wells to be determined, which are included in the target block;
acquiring stratigraphic construction diagrams of the target wells according to the seismic data interpretation data of the target wells;
determining a stratigraphic contrast map of the plurality of target wells according to the stratigraphic structural maps of the plurality of target wells, wherein the stratigraphic contrast map comprises the structural maps of the plurality of target wells;
for each target well, determining a bottom map of the target well in the stratigraphic correlation map, and determining a formation map of the target well from the synthetic columns of the standard wells according to the depth of layer of the target well;
comparing the stratigraphic diagram of the target well with the tectonic diagram of the target well to obtain a comparison difference of the target well;
and determining the oil and gas potential of the target well according to the comparison difference.
In one possible implementation, the determining a synthetic histogram of the standard wells of the target block according to the well logging information of the plurality of test wells includes:
acquiring natural potential curves of the plurality of test wells, and performing superposition fitting on the natural potential curves of the plurality of test wells to obtain a natural potential curve of the standard well of the target block;
acquiring gamma curves of the plurality of test wells, and performing superposition fitting on the gamma curves of the plurality of test wells to obtain gamma curves of the standard wells of the target block;
combining the logging interpretation electronic data of the plurality of test wells with the existing comprehensive logging graphs of the plurality of test wells and the logging graphs of the plurality of test wells for overlapping drawing to obtain the logging graphs of the standard wells of the target block;
and combining the natural potential curve of the standard well, the gamma curve of the standard well and the log map of the standard well into a comprehensive histogram of the standard well of the target block.
In another possible implementation, the acquiring the stratigraphic configuration map of the plurality of target wells according to the seismic data interpretation data of the plurality of target wells comprises:
obtaining rock stratum physical property data of the target block from the seismic data interpretation data of the target wells;
drawing a structural section view and a lithologic section view of a plurality of wells of the target block in the vertical depth direction according to the rock stratum physical property data of the target block;
and combining the tectonic profile and the lithologic profile of the plurality of target wells into a stratigraphic tectonic profile of the plurality of target wells.
In another possible implementation, the determining a stratigraphic mapping of the plurality of target wells from the stratigraphic configuration maps of the plurality of target wells comprises:
and arranging the stratum structure diagrams corresponding to the plurality of test wells of the target block according to the depth of layer corresponding to each test well to obtain an arranged structure diagram, wherein the arranged structure diagram is a stratum contrast diagram of the target block, and the stratum contrast diagram comprises the structure diagrams of the plurality of wells.
In another possible implementation manner, the comparing the stratigraphic diagram of the target well with the tectonic diagram of the target well to obtain a comparison difference of the target well includes:
and comparing the stratigraphic diagram of the target well with the tectonic diagram of the target well, acquiring a difference part of the natural potential curve and/or the natural gamma curve, and acquiring resistivity curve data at the corresponding position of the difference part.
In another possible implementation, the determining the hydrocarbon potential of the target well according to the comparison difference includes:
and performing parameter extraction and parameter recording on the target well, acquiring the variation trend of the stratum thickness, the natural gamma, the natural potential and the resistivity of the target region in the direction with difference, fitting in combination with the same source direction, comparing the difference with larger difference to obtain the reason of the difference, performing potential analysis according to the reason of the difference, performing hole filling at the position of the difference to determine the potential layer of the target well.
According to a second aspect of embodiments of the present disclosure, there is provided an apparatus for discovering hydrocarbon potential, the apparatus comprising:
the system comprises a first acquisition module, a second acquisition module and a third acquisition module, wherein the first acquisition module is configured to acquire logging information of a plurality of test wells included in a target block, and the logging information comprises existing comprehensive logging graphs, logging graphs and logging interpretation electronic data;
a first determination module configured to determine a synthetic histogram of a standard well of the target block according to the logging information of the plurality of test wells, wherein the standard well is formed by combining the plurality of test wells;
a second acquisition module configured to acquire seismic data interpretation data of a plurality of target wells to be determined, which are included in the target block;
a third acquisition module configured to acquire stratigraphic construction maps of the plurality of target wells according to the seismic data interpretation data of the plurality of target wells;
a second determination module configured to determine a stratigraphic contrast map of the plurality of target wells from a stratigraphic configuration map of the plurality of target wells, the stratigraphic contrast map comprising a configuration map of the plurality of target wells;
a third determination module configured to determine, for each target well, a stratigraphic representation of the target well in the stratigraphic comparison map, and determine a formation map of the target well from the synthetic columns of the standard wells according to the depth of layer of the target well;
a comparison module configured to compare the stratigraphic diagram of the target well with the tectonic diagram of the target well to obtain a comparison difference of the target well;
a fourth determination module configured to determine a hydrocarbon potential of the target well based on the comparison difference.
In a possible implementation manner, the first determining module is further configured to obtain natural potential curves of the plurality of test wells, and perform superposition fitting on the natural potential curves of the plurality of test wells to obtain a natural potential curve of a standard well of the target block; acquiring gamma curves of the plurality of test wells, and performing superposition fitting on the gamma curves of the plurality of test wells to obtain gamma curves of the standard wells of the target block; combining the logging interpretation electronic data of the plurality of test wells with the existing comprehensive logging graphs of the plurality of test wells and the logging graphs of the plurality of test wells for overlapping drawing to obtain the logging graphs of the standard wells of the target block; and combining the natural potential curve of the standard well, the gamma curve of the standard well and the log map of the standard well into a comprehensive histogram of the standard well of the target block.
In another possible implementation, the third obtaining module is further configured to obtain rock formation property data of the target block from the seismic data interpretation data of the plurality of target wells; drawing a structural section view and a lithologic section view of a plurality of wells of the target block in the vertical depth direction according to the rock stratum physical property data of the target block;
and combining the tectonic profile and the lithologic profile of the plurality of target wells into a stratigraphic tectonic profile of the plurality of target wells.
In another possible implementation manner, the second determining module is further configured to arrange the stratigraphic structure charts corresponding to the multiple test wells of the target block according to the depth of layer corresponding to each test well to obtain an arranged structure chart, where the arranged structure chart is a stratigraphic comparison chart of the target block, and the stratigraphic comparison chart includes the stratigraphic charts of the multiple wells.
In another possible implementation manner, the comparison module is further configured to compare the stratigraphic diagram of the target well with the tectonic diagram of the target well, obtain a difference portion of the natural potential curve and/or the natural gamma curve, and obtain resistivity curve data at a corresponding position of the difference portion.
In another possible implementation manner, the fourth determining module is further configured to perform parameter extraction and parameter recording on the target well, obtain a variation trend of the formation thickness, the natural gamma, the natural potential, and the resistivity of the target region in the direction with the difference, perform fitting in combination with the same source direction, compare the differences with each other to obtain the cause of the difference, perform potential analysis on the cause of the difference, perform hole patching at the position where the difference occurs, and determine the potential layer of the target well.
The technical scheme provided by the embodiment of the disclosure can have the following beneficial effects:
the stratum contrast chart and the comprehensive histogram of the standard well are obtained through the well logging data and the seismic data interpretation data, and the obtained conclusion is accurate due to clear and definite steps and the fine analysis of the existing data, so that the method can be used for searching the target well with the oil-gas potential.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.
FIG. 1 is a flow chart illustrating a method of determining hydrocarbon potential in accordance with an exemplary embodiment;
FIG. 2 is a flow chart illustrating another method of determining hydrocarbon potential in accordance with an exemplary embodiment;
FIG. 3 is a graph illustrating a natural gamma curve overlay, according to an exemplary embodiment;
FIG. 4 is a schematic diagram of a standard well synthetic column representation shown in accordance with an exemplary embodiment
FIG. 5 is a schematic illustration of a comparison view of a formation shown in accordance with an exemplary embodiment;
FIG. 6 is a schematic diagram illustrating an example of a mutation, according to an exemplary embodiment;
FIG. 7 is a schematic diagram illustrating a comparison of different depths of a single well in accordance with an exemplary embodiment;
FIG. 8 is a flow chart illustrating another method of determining hydrocarbon potential in accordance with an exemplary embodiment;
FIG. 9 is a schematic illustration of a comparison view of a formation shown in accordance with an exemplary embodiment;
FIG. 10 is a block diagram illustrating an apparatus for determining hydrocarbon potential in accordance with an exemplary embodiment.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the invention, as detailed in the appended claims.
FIG. 1 is a flow chart illustrating a method of determining hydrocarbon potential according to an exemplary embodiment for addressing problems of prior art system operation methods that do not finely analyze existing data to find missing target wells with hydrocarbon potential, as shown in FIG. 1, including the following steps.
In step 101, the terminal obtains logging information of a plurality of test wells included in the target block, wherein the logging information includes existing comprehensive logging graphs, logging graphs and logging interpretation electronic data.
In step 102, the terminal determines a synthetic histogram of a standard well of the target block according to the logging information of the plurality of test wells, wherein the standard well is formed by combining the plurality of test wells.
In step 103, the terminal obtains seismic data interpretation data of a plurality of target wells to be determined included in the target block.
In step 104, the terminal obtains stratigraphic configuration maps of the target wells according to the seismic data interpretation data of the target wells.
In step 105, the terminal determines a stratigraphic comparison map of the plurality of target wells according to the stratigraphic construction maps of the plurality of target wells, wherein the stratigraphic comparison map comprises the stratigraphic construction maps of the plurality of target wells.
In step 106, the terminal determines a bottom map of the target well in the stratigraphic comparison map for each target well, and determines a tectonic map of the target well from the synthetic histogram of the standard well according to the depth of the target well;
in step 107, the terminal compares the stratigraphic diagram of the target well with the tectonic diagram of the target well to obtain a comparison difference of the target well;
in step 108, the terminal determines the oil and gas potential of the target well according to the comparison difference.
The comprehensive histogram of the stratigraphic contrast chart and the standard well is determined through the well logging data and seismic data interpretation data, and the determined conclusion is accurate due to clear and definite steps and the fine analysis of the existing data, so that the method can be used for searching the target well with oil and gas potential.
FIG. 2 is a flow chart illustrating a method of determining hydrocarbon potential according to an exemplary embodiment for addressing the problems of prior art system operation methods that do not finely analyze existing data to find missing target wells with hydrocarbon potential, as shown in FIG. 2, including the following steps.
In step 201, the terminal obtains logging information of a plurality of test wells included in the target block, wherein the logging information includes existing comprehensive logging graphs, logging graphs and logging interpretation electronic data.
The terminal determines a plurality of test wells of the target block, the plurality of test wells are test wells at different layer depth positions, and at least one test well with a representative value is selected at each layer depth position, for example, two test wells with the layer depth position of 1500 meters to the layer depth position of 1800 meters are selected. And the terminal collects the logging data of the plurality of test wells at different layer depth positions, and the layer depth positions of the plurality of test wells cover the whole target block. The comprehensive logging chart and the logging chart are logging information of each test well which is manually drawn, the original comprehensive logging chart and the original logging chart are paper-version information, and the terminal acquires scanning data of the comprehensive logging chart and the original logging chart. And the terminal acquires the well logging interpretation electronic data, wherein the well logging interpretation electronic data is well logging information drawn by each test well through electronic equipment.
In step 202, the terminal determines a synthetic histogram of a standard well of the target block according to the logging information of the plurality of test wells, wherein the standard well is formed by combining the plurality of test wells.
This step can be realized by the following steps (1) to (4):
(1) and the terminal acquires the natural potential curves of the plurality of test wells, and performs superposition fitting on the natural potential curves of the plurality of test wells to obtain the natural potential curve of the standard well of the target block.
And measuring the potential difference by the terminal through natural potential logging to obtain a natural potential curve, wherein the potential difference is formed when the mineralization degree of the drilling fluid in the well is different from the stratum mineralization degree. And performing superposition fitting on the natural potential curves of the plurality of test wells, wherein the superposed and fitted natural potential curves comprise the rock stratum geological characteristics of the blocks where the plurality of test wells are located, and the superposed and fitted natural potential curves are used as the natural potential curves of the standard wells of the target blocks.
(2) And the terminal acquires the gamma curves of the plurality of test wells, performs superposition fitting on the gamma curves of the plurality of test wells, and determines the gamma curve of the standard well of the target block.
The terminal measures the intensity of gamma rays in the formation through natural gamma logging, the higher the content of radioactive material in the formation, the stronger the intensity of the gamma rays. And the terminal performs superposition fitting on the gamma curves obtained from the plurality of test wells, the gamma curves subjected to superposition fitting cover all rock stratum characteristics of the block where the plurality of test wells are located, and the gamma curves subjected to superposition fitting are used as standard well gamma curves of the target block. A natural gamma curve overlay can be seen with reference to fig. 3.
(3) And the terminal combines the well logging interpretation electronic data of the plurality of test wells with the existing comprehensive well logging graphs of the plurality of test wells and the well logging graphs of the plurality of test wells for overlapping drawing to determine the well logging graph of the standard well of the target block.
The terminal arranges the logging explanation electronic data of each test well in a plurality of test wells, marks the logging explanation electronic data of each test well according to the depth of layer of a target block where the plurality of test wells are located as a reference, simultaneously draws the comprehensive logging graph and the logging graph of the test well in an overlapping mode, keeps the curve with oil and gas expression as an effective curve, removes the curve without oil and gas expression caused by insufficient technology or wrong data recognition as an ineffective curve, arranges the logging graph of each test well after redrawing according to different depth of layer positions, and forms the logging graph of the standard well of the target block after arranging the logging graphs of the plurality of test wells according to the depth of layer positions.
(4) And the terminal combines the natural potential curve of the standard well, the gamma curve of the standard well and the log map of the standard well into a comprehensive histogram of the standard well of the target block.
And (3) drawing the natural potential curve of the standard well, the gamma curve of the standard well and the log map of the standard well in the steps (1) to (3) into a graph together according to the layer depth positions by the terminal, namely drawing the graph which is a comprehensive histogram of the standard well, wherein the natural potential curve of the standard well, the gamma curve of the standard well and the log map of the standard well correspond to different natural potential curves, gamma curves and log maps of different layer depth positions, and the natural potential curve of the standard well, the gamma curve of the standard well and the log map of the standard well form the comprehensive histogram of the standard well of the target block.
In step 203, the terminal obtains seismic data interpretation data of a plurality of target wells to be determined included in the target block.
The method comprises the steps that a terminal determines a plurality of target wells in a target area needing oil and gas potential discovery, the target wells are a plurality of target wells to be determined, and seismic data interpretation data of the target wells to be determined are obtained.
In step 204, the terminal obtains stratigraphic configuration maps of the target wells according to the seismic data interpretation data of the target wells.
For each target well, the seismic data interpretation data of the target well comprises the rock stratum physical property data of the target well, the terminal acquires the rock stratum physical property data of the target well in the target block from the seismic data interpretation data of the target wells, the structural section diagram and the lithologic section diagram of the target wells in the vertical depth direction of the target block are drawn according to the rock stratum physical property data of the target well in the target block, and the structural section diagram and the lithologic section diagram form the stratigraphic structure diagram of the target block.
In step 205, the terminal determines a stratigraphic contrast map of the plurality of target wells according to the stratigraphic structural maps of the plurality of target wells, wherein the stratigraphic contrast map comprises the structural maps of the plurality of target wells.
And summarizing the stratigraphic structural diagrams of the target wells, and arranging the stratigraphic structural diagrams corresponding to the test wells of the target block according to the depth of layer corresponding to each test well to obtain an arranged structural diagram, wherein the arranged structural diagram is a stratigraphic comparison diagram of the target block, and the stratigraphic comparison diagram comprises the structural diagrams of the wells. For example, the target block includes a plurality of test wells with surface-to-depth positions of 1800 meters, each test well has a depth span of 300 meters, and the formation structure maps corresponding to the 6 test wells are arranged according to the depth positions to obtain the formation comparison map of the target block in 6 depth position sections of the target block, wherein each depth position section corresponds to one test well, namely, 6 test wells are provided in total.
In step 206, the terminal determines, for each target well, a floor map of the target well in the stratigraphic comparison map, and a formation map of the target well from the synthetic columns of the standard wells based on the depth of the target well.
Fig. 4 is an exemplary standard well synthetic histogram, and fig. 4 shows different zones, including 1 sand group, 2 sand groups, 3 sand groups, 4 sand groups and three sand segments, according to different geological structures of different depths. FIG. 5 is a portion of an exemplary stratigraphic contrast map, which is a stratigraphic configuration of a target well having a depth of layer of 1500 meters to 1800 meters, including four hydrocarbon potential regions, a first region, a second region, a third region, and a fourth region.
In step 207, the terminal compares the bottom map of the target well with the structural map of the target well to obtain a comparison difference of the target well.
And comparing the stratum contrast map with the standard well comprehensive histogram to obtain a difference part of a natural potential curve and/or a natural gamma curve and obtain resistivity curve data at corresponding positions of the difference part. Comparing the comprehensive histogram of the layer depth corresponding to fig. 5 and fig. 4, and obtaining the difference part of the natural potential curve and the natural gamma curve, for example, the shape of the stratum contrast diagram of the layer depth having four regions in the diagram is similar to that of the position having oil gas in the comprehensive histogram, namely the difference. And acquiring resistivity curve data at corresponding positions of the difference parts.
In step 208, the terminal determines the oil and gas potential of the target well according to the comparison difference.
Carrying out parameter extraction and parameter recording on a target well, obtaining the variation trend of the stratum thickness, the natural gamma, the natural potential and the resistivity of a target area in the direction with difference, fitting in combination with the direction of the same source, comparing the difference with larger difference to obtain the reason of the difference, carrying out potential analysis on the reason of the difference, carrying out hole filling at the position of the difference to determine the potential layer of the target well. Reading the maximum value, the minimum value and the average value of the natural potential and the natural gamma curve with obvious abrupt change or gradual change or gentle image, and reading out the resistivity curve data at the corresponding position; the method comprises the steps of taking a standard well as a reference, extracting and recording parameters of a target well according to superposition fitting change, beginning to research a change trend graph of stratum thickness, natural gamma, natural potential and resistivity in a certain direction of a research area in a source direction, combining the superposition fitting in the same source direction, separating curve change trends in the research direction, performing key analysis on sudden changes or logging differences with large differences, performing experimental hole filling recognition on the premise of existing monitoring, test data and production data according to image-text visual change and digital data change trends, finding out causes of sudden changes or sudden changes, performing potential analysis, performing hole filling recognition on the sudden changes or the sudden changes, and further determining a potential layer of the target well.
And comparing the bottom map of the target well with the construction map of the target well, wherein the mutation is found in the comparison process, and the mutation position is the oil gas potential. In one possible implementation, as shown in fig. 7, a comparison graph of different depths of a single well is shown, that is, different depths of a single well are compared with each other to find the hydrocarbon potential of the well. Fig. 8 is a schematic flow chart illustrating the steps 201 to 206.
In step 209, after determining the oil and gas potentials of the target wells, the terminal performs perforation verification to obtain hole filling logging data, and directs subsequent oil and gas exploitation of the same type of blocks according to the hole filling logging data.
After the terminal determines the oil and gas potentials of the target wells, punching verification is carried out on one of the target wells, namely hole filling, hole filling logging data is obtained, the hole filling logging data and an oil and gas potential conclusion are verified, the x42-78x well is an oil well drilled in 2013 in 1 month, and the current production interval VI oil group 70#, 1768.0-1774.0m and 6.0m/1 layer are obtained. 21 tons of oil are produced in the initial period, and 2.3 tons of oil are produced in the current day. For the fact that the shift of the X42-81X well 2015 in 6 months is applied to the X42-78X well II2Water injection, the understanding of hole filling property is suggested to the x42-78x hole filling II for increasing the productivity 258#, 1598.4-1603.4m and 5m/1 layer; 60#, 1609.2-1613.0m, 3.8m/1 layer, good effect after hole repairing, and 8.5 tons of oil production per day after hole repairing. And according to the hole-filling logging data, a comprehensive histogram of the standard well is perfected, and a conclusion obtained by the hole-filling logging data can be used for guiding the subsequent oil and gas exploitation of the same type of blocks.
The method comprises the steps of taking x42-70 fault blocks as an example, the fault blocks are layered lithologic reservoir, the reservoir is gray siltstone, the porosity is 25.83%, the permeability is 24.42 × 10-3 mu m2, the high-porosity low-permeability reservoir is high-porosity low-permeability reservoir, the freezing point is 42 ℃, and the wax content is 33.45%, the fault blocks are found to have certain difference after a stratigraphic comparison diagram of the fault blocks is compared with a comprehensive histogram of a standard well due to the difference of crude oil physical properties, a stratigraphic comparison diagram of the block, such as an oil well, a water well comprehensive log diagram, a log diagram, well log curve electronic data and the like, is found in a geological archive chamber, and meanwhile, existing seismic data explained by seismic data of the block, including existing explained data, known horizon data, construction data and production information data are developed, a stratigraphic comparison diagram of the current block is drawn according to the data and results explained by the previous seismic data and the structural diagram, and when the well log data and the well data are used as well data and the well data, the well data and the well data are obtained.
For the hole patching logging data obtained after hole patching, the hole patching result can be shown in table 1.
Table 1 two wells illustrate hole patching recognition
The method has the advantages that the understanding of how to optimize the elastic mining fault block in more intervals is realized, the hole is supplemented experimentally, the hole is further recognized deterministically, and the new yield supplement is needed to be found. According to the up-and-down exploration of the initial production, new knowledge is obtained, different oil groups are known in the block, and the oil group VI is generally found to have higher yield. Therefore, stratum contrast and seismic data recognition are carried out on the corresponding layers. xx42-70 fault blocks mainly develop an Es34-1 II oil layer, and an oil layer I is found in xx42-83x well zones, the thickness of 3 layers is 19 meters, and the oil content is small in amplitude and area.
In another example, taking the new block xx42-70 fault block as an example, the fault block is a well which is newly put into production and has a higher degree of importance for the well, in the current oil well production, hole patching is performed from bottom to top, elastic production is performed on the fault block, knowledge data obtained by optimizing multiple intervals is optimized, experimental hole patching is performed, further, deterministic hole patching is performed, and how to find new production capacity patching needs to be solved. According to the data of the production at the beginning, the logging data of the block is searched up and down to obtain new knowledge, and the comparison knowledge of different oil groups in the block generally finds that the yield of VI oil groups is higher. Therefore, the logging data of the corresponding layer depth is compared with the comprehensive histogram of the standard well, and the stratigraphic contrast map of the block is obtained through the seismic data. As shown in FIG. 9, xx42-70 fault blocks mainly develop an Es34-1 II oil layer, and an oil layer I is found in xx42-83x well zones, the thickness of 3 layers is 19 meters, and the oil content is small in amplitude and area.
The stratum contrast chart and the comprehensive histogram of the standard well are obtained through the well logging data and the seismic data interpretation data, and the obtained conclusion is accurate due to clear and definite steps and the fine analysis of the existing data, so that the method can be used for searching the target well with the oil-gas potential.
FIG. 10 is a block diagram illustrating an apparatus for determining hydrocarbon potential in accordance with an exemplary embodiment. Referring to fig. 10, the apparatus includes a first obtaining module 1001, a first determining module 1002, a second obtaining module 1003, a third obtaining module 1004, a second determining module 1005, a third determining module 1006, a comparing module 1007, and a fourth determining module 1008.
The first obtaining module 1001 is configured to obtain well logging information of a plurality of test wells included in a target block, where the well logging information includes existing comprehensive well logging maps, and well logging interpretation electronic data
The first determining module 1002 is configured to determine a synthetic histogram of a standard well of the target block according to the logging information of the plurality of test wells, wherein the standard well is formed by combining the plurality of test wells;
the second obtaining module 1003 is configured to obtain seismic data interpretation data of a plurality of target wells to be determined, which are included in the target block;
the third acquiring module 1004 is configured to acquire stratigraphic construction maps of the plurality of target wells according to the seismic data interpretation data of the plurality of target wells;
the second determining module 1005 is configured to determine a stratigraphic contrast map of the plurality of target wells according to the stratigraphic structural maps of the plurality of target wells, wherein the stratigraphic contrast map comprises the structural maps of the plurality of target wells;
the third determination module 1006 is configured to determine, for each target well, a bottom layer map of the target well in the stratigraphic correlation map, and determine a formation map of the target well from the synthetic columns of the standard wells according to the depth of layer of the target well;
the comparison module 1007 is configured to compare the stratigraphic diagram of the target well with the structural diagram of the target well to obtain a comparison difference of the target well;
the fourth determination module 1008 is configured to determine the hydrocarbon potential of the target well according to the comparison difference.
In a possible implementation manner, the first determining module 1001 is further configured to obtain natural potential curves of the plurality of test wells, and perform superposition fitting on the natural potential curves of the plurality of test wells to obtain a natural potential curve of a standard well of the target block; acquiring gamma curves of the plurality of test wells, and performing superposition fitting on the gamma curves of the plurality of test wells to obtain gamma curves of the standard wells of the target block; combining the logging interpretation electronic data of the plurality of test wells with the existing comprehensive logging graphs of the plurality of test wells and the logging graphs of the plurality of test wells for overlapping drawing to obtain the logging graphs of the standard wells of the target block; and combining the natural potential curve of the standard well, the gamma curve of the standard well and the log map of the standard well into a comprehensive histogram of the standard well of the target block.
In another possible implementation, the third obtaining module 1004 is further configured to obtain rock formation property data of the target block from the seismic data interpretation data of the plurality of target wells; drawing a structural section view and a lithologic section view of a plurality of wells of the target block in the vertical depth direction according to the rock stratum physical property data of the target block;
and combining the tectonic profile and the lithologic profile of the plurality of target wells into a stratigraphic tectonic profile of the plurality of target wells.
In another possible implementation manner, the second determining module 1005 is further configured to arrange the stratigraphic structure charts corresponding to the multiple test wells of the target block according to the depth of layer corresponding to each test well, so as to obtain an arranged structure chart, where the arranged structure chart is a stratigraphic comparison chart of the target block, and the stratigraphic comparison chart includes the stratigraphic charts of the multiple wells.
In another possible implementation, the comparing module 1007 is further configured to compare the stratigraphic diagram of the target well with the tectonic diagram of the target well, obtain a difference portion of the natural potential curve and/or the natural gamma curve, and obtain resistivity curve data at a corresponding position of the difference portion.
In another possible implementation manner, the fourth determining module 1008 is further configured to perform parameter extraction and parameter recording on the target well, obtain a variation trend of the formation thickness, the natural gamma, the natural potential, and the resistivity of the target region in different directions, perform fitting in combination with the same source direction, compare the differences with a larger value, obtain the causes of the differences, perform potential analysis on the causes of the differences, perform hole patching at the positions where the differences occur, and determine the potential layer of the target well.
The stratum contrast chart and the comprehensive histogram of the standard well are obtained through the well logging data and the seismic data interpretation data, and the obtained conclusion is accurate due to clear and definite steps and the fine analysis of the existing data, so that the method can be used for searching the target well with the oil-gas potential.
Other embodiments of the invention will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the invention and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the invention being indicated by the following claims.
It will be understood that the invention is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the invention is limited only by the appended claims.
Claims (12)
1. A method of determining hydrocarbon potential, the method comprising:
acquiring logging information of a plurality of test wells included in a target block, wherein the logging information comprises existing comprehensive logging graphs, logging graphs and logging interpretation electronic data;
determining a comprehensive histogram of a standard well of the target block according to the logging information of the plurality of test wells, wherein the standard well is formed by combining the plurality of test wells;
acquiring seismic data interpretation data of a plurality of target wells to be determined, which are included in the target block;
acquiring stratigraphic construction diagrams of the target wells according to the seismic data interpretation data of the target wells;
determining a stratigraphic contrast map of the plurality of target wells according to the stratigraphic structural maps of the plurality of target wells, wherein the stratigraphic contrast map comprises the structural maps of the plurality of target wells;
for each target well, determining a stratigraphic representation of the target well in the stratigraphic comparison map, and determining a tectographic representation of the target well from the synthetic columns of the standard wells according to the depth of layer of the target well;
comparing the stratigraphic diagram of the target well with the tectonic diagram of the target well to obtain a comparison difference of the target well;
and determining the oil and gas potential of the target well according to the comparison difference.
2. The method of claim 1, wherein determining a synthetic histogram of standard wells of the target block from the well log data of the plurality of test wells comprises:
acquiring natural potential curves of the plurality of test wells, and performing superposition fitting on the natural potential curves of the plurality of test wells to obtain a natural potential curve of the standard well of the target block;
acquiring gamma curves of the plurality of test wells, and performing superposition fitting on the gamma curves of the plurality of test wells to obtain gamma curves of the standard wells of the target block;
combining the logging interpretation electronic data of the plurality of test wells with the existing comprehensive logging graphs of the plurality of test wells and the logging graphs of the plurality of test wells for overlapping drawing to obtain the logging graphs of the standard wells of the target block;
and combining the natural potential curve of the standard well, the gamma curve of the standard well and the log map of the standard well into a comprehensive histogram of the standard well of the target block.
3. The method of claim 1, wherein the obtaining a stratigraphic configuration map of the plurality of target wells from the seismic data interpretation data of the plurality of target wells comprises:
obtaining rock stratum physical property data of the target block from the seismic data interpretation data of the target wells;
drawing a structural section view and a lithologic section view of a plurality of wells of the target block in the vertical depth direction according to the rock stratum physical property data of the target block;
and combining the tectonic profile and the lithologic profile of the plurality of target wells into a stratigraphic tectonic profile of the plurality of target wells.
4. The method of claim 1, wherein determining the stratigraphic comparison map for the plurality of target wells from the stratigraphic configuration map for the plurality of target wells comprises:
and arranging the stratum structure diagrams corresponding to the plurality of test wells of the target block according to the depth of layer corresponding to each test well to obtain an arranged structure diagram, wherein the arranged structure diagram is a stratum contrast diagram of the target block, and the stratum contrast diagram comprises the structure diagrams of the plurality of target wells.
5. The method of claim 1, wherein comparing the stratigraphic representation of the target well to the tectonic representation of the target well to obtain a comparison difference for the target well comprises:
and comparing the stratigraphic diagram of the target well with the tectonic diagram of the target well, acquiring a difference part of the natural potential curve and/or the natural gamma curve, and acquiring resistivity curve data at the corresponding position of the difference part.
6. The method of claim 1, wherein determining a hydrocarbon potential of the target well from the comparison difference comprises:
and performing parameter extraction and parameter recording on the target well, acquiring the variation trend of the stratum thickness, the natural gamma, the natural potential and the resistivity of the target region in the direction with difference, fitting in combination with the same source direction, comparing the difference with larger difference to obtain the reason of the difference, performing potential analysis according to the reason of the difference, performing hole filling at the position of the difference to determine the potential layer of the target well.
7. An apparatus for discovering hydrocarbon potential, the apparatus comprising:
the system comprises a first acquisition module, a second acquisition module and a third acquisition module, wherein the first acquisition module is configured to acquire logging information of a plurality of test wells included in a target block, and the logging information comprises existing comprehensive logging graphs, logging graphs and logging interpretation electronic data;
a first determination module configured to determine a synthetic histogram of a standard well of the target block according to the logging information of the plurality of test wells, wherein the standard well is formed by combining the plurality of test wells;
a second acquisition module configured to acquire seismic data interpretation data of a plurality of target wells to be determined, which are included in the target block;
a third acquisition module configured to acquire stratigraphic construction maps of the plurality of target wells according to the seismic data interpretation data of the plurality of target wells;
a second determination module configured to determine a stratigraphic contrast map of the plurality of target wells from a stratigraphic configuration map of the plurality of target wells, the stratigraphic contrast map comprising a configuration map of the plurality of target wells;
a third determination module configured to determine, for each target well, a stratigraphic representation of the target well in the stratigraphic comparison map, and determine a formation map of the target well from the synthetic columns of the standard wells according to the depth of layer of the target well;
a comparison module configured to compare the bottom layer diagram of the target well with the structural diagram of the target well to obtain a comparison difference of the target well;
a fourth determination module configured to determine a hydrocarbon potential of the target well based on the comparison difference.
8. The apparatus of claim 7, wherein the first determining module is further configured to obtain natural potential curves of the plurality of test wells, and perform a superposition fitting on the natural potential curves of the plurality of test wells to obtain natural potential curves of standard wells of the target block; acquiring gamma curves of the plurality of test wells, and performing superposition fitting on the gamma curves of the plurality of test wells to obtain gamma curves of the standard wells of the target block; combining the logging interpretation electronic data of the plurality of test wells with the existing comprehensive logging graphs of the plurality of test wells and the logging graphs of the plurality of test wells for overlapping drawing to obtain the logging graphs of the standard wells of the target block; and combining the natural potential curve of the standard well, the gamma curve of the standard well and the log map of the standard well into a comprehensive histogram of the standard well of the target block.
9. The apparatus of claim 7, wherein the third acquisition module is further configured to acquire petrophysical data of the target block from seismic data interpretation data of the plurality of target wells; drawing a structural section view and a lithologic section view of a plurality of wells of the target block in the vertical depth direction according to the rock stratum physical property data of the target block;
and combining the tectonic profile and the lithologic profile of the plurality of target wells into a stratigraphic tectonic profile of the plurality of target wells.
10. The apparatus of claim 7, wherein the second determining module is further configured to rank the stratigraphic configuration maps corresponding to the plurality of test wells of the target block according to the depth of layer corresponding to each test well, so as to obtain a ranked configuration map, and the ranked configuration map is a stratigraphic comparison map of the target block, where the stratigraphic comparison map includes the stratigraphic configuration maps of the plurality of wells.
11. The apparatus of claim 7, wherein the comparison module is further configured to compare a stratigraphic representation of the target well with a formation representation of the target well, obtain a difference portion of the natural potential curve and/or the natural gamma curve, and obtain resistivity curve data at a corresponding location of the difference portion.
12. The apparatus of claim 7, wherein the fourth determining module is further configured to perform parameter extraction and parameter recording on the target well, obtain variation trends of the formation thickness, natural gamma, natural potential and resistivity of the target region in different directions, perform fitting in combination with a same source direction, compare the differences with each other to obtain causes of the differences, perform potential analysis on the causes of the differences, perform hole patching at the positions where the differences occur, and determine a potential layer of the target well.
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