CN1834403A - Hot air filling balance oil recovery technique 'zhanqian' mountain oil reservoir - Google Patents
Hot air filling balance oil recovery technique 'zhanqian' mountain oil reservoir Download PDFInfo
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- CN1834403A CN1834403A CN 200610046395 CN200610046395A CN1834403A CN 1834403 A CN1834403 A CN 1834403A CN 200610046395 CN200610046395 CN 200610046395 CN 200610046395 A CN200610046395 A CN 200610046395A CN 1834403 A CN1834403 A CN 1834403A
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Abstract
A process for balance-extracting oil from oil layer of buried hill by injecting high temperature air includes injecting high temperature air of above 350 deg.c at position of gas cap on buried hill old oil well to let rised oil-water boundary caused by exploiting crude oil move downwards for certain distance then exploiting crude oil in well by air driving means for raising recovery ratio of old oil well by 15 %.
Description
Technical field:
The present invention relates to a kind of hot air filling balance oil recovery technique ' zhanqian ' mountain oil reservoir, belong to oil field combustion in situ technology of reservoir sweep class.
Background technology:
The general oil production of buried hill oil pool is very high in the oilfield development process, owing to influenced by lithologic character controlling, be present in the fine and close crack and cracked hole such as block buried hill structural oil pool oil, rely on the end water energy drives oil reservoir of bottom, buried hill during exploitation, because the output that rises waterborne descends at the end, for improving recovery ratio, similar block buried hill oil pool is generally adopted combustion in situ beyond example still, that adopts at present upwards pushes away oily way to bottom, buried hill water flooding regime with end water, recovery ratio is improved, but this water flooding regime is that the end is waterborne when being raised to the buried hill tip position when acquiring a certain degree, moisture content can reach more than 95% in the well, promptly can't exploit crude oil in the oil well, make to be present in that remaining oil becomes the region of bypassed oil in the buried hill, a kind of for this reason buried hill oil reservoir injection high temperature air balance oil production technology can be exploited the remaining oil of this type of buried hill oil reservoir, make recovery ratio improve 20%, this method domestic and foreign literature by retrieval is not reported.
Summary of the invention:
Purpose of the present invention is in order to overcome above-mentioned shortcoming, and a kind of hot air filling balance oil recovery technique ' zhanqian ' mountain oil reservoir that provides can reach 95% oil well that does not have the value of recovering the oil to the buried hill oil pool moisture content that adopts waterflooding extraction and recover the oil, makes recovery ratio to improve 15% again on former basis.
Technical solution of the present invention:
Be the task of realizing that the present invention proposes, this technology comprises the steps to finish:
One, at first buried hill oil storage rerum natura is selected:
The buried hill lithology is the carbonate quartzite, and metamorphic rock (shallow particle rock matter migmatite, granulite matter kataclastics, biotite shallow particle rock matter kataclastics) and buried hill rock mass intrusive rock in diaclase is arranged, micropore, crack dual media, the oil reservoir shape is block buried hill, and has end water to exist in the bottom, buried hill.
Two, well location is selected and is determined:
The present invention can select the buried hill oil reservoir to utilize OW in the existing oil field to carry out water filling gas injection and oil recovery and needn't bore new well, the former perforated interval of the old well of reply carries out shutoff before the construction, and according to construction requirement dead chick hole again, also to select in addition its moisture content of OW of being exploited at the oil well more than 95% as the construction well.
Three, the oil well that is determined is included the well section and inject hot air below 350 ℃, force the oil-water interfaces that rise because of crude oil extraction early stage in the buried hill to move down into certain distance to new produce oil water termination position, promptly till the balance interface place.
Four, the buried hill oil reservoir is exploited:
After above-mentioned steps is finished, utilize the reservoir section on the new produce oil water termination after the gas injection in the OW to recover the oil again, as new produce oil water termination occurs and move down situation, can come oil-water interfaces are adjusted to buried hill oil pool bottom water flooding regime by offset well, have sufficient energy to keep original formation pressure.
New produce oil water termination after the described gas injection is how many balance interface positions is controlled by the tolerance of injecting＜350 ℃ of hot airs, and interface location should be advisable at 2/3 place under new produce oil water termination after the Yuan Laojing gas injection.
Operating principle of the present invention is:
During the end water level that buried hill oil reservoir water injection well and producing well when drilling well will enter the bottom, buried hill is put, because waterborne of the end of buried hill oil pool is the oil reservoir band, oil reservoir top is the gas-bearing formation zonation, be at oil well under the state of long-term exploitation, can make on the end water termination in the structure of the block buried hill of volume and move, be that oil-water interfaces constantly rise, cause the oil recovery moisture content situation that progressively raises, final well water 95% above closing well.The present invention utilizes in the buried hill water from bottom to top, oil, the gas regularity of distribution and adopt and hot air gas is injected in inner top position, buried hill the producing well section oil-water interface of water logging oil well is progressively moved down, so just can guarantee crude oil in the extraction well as much as possible, if aerogenesis still in the well in the oil recovery process, represent that then the OIH water termination is low excessively, can pass through again this moment to buried hill inner bottom part water flooding regime, oil-water interfaces are moved on progressively, like this by using water filling, method of gas injection is adjusted the oil gas oil-water interfaces position of buried hill reservoir, thereby play balance water filling gas injection effect, guarantee the unlikely reduction of recovery ratio.
The advantage that the present invention compared with prior art has is:
The present invention is owing to adopted mode from hot air to the buried hill tip position that inject, oil-water interfaces in the buried hill that has raise are moved down, thereby enlarged the oil reservoir volume, in addition in oil recovery process as aerogenesis phenomenon in the well occurs, show that promptly oil-water interfaces are low excessively, can adjust oil-water interfaces by water flooding regime again makes it to move, make oil-water interface can keep stable equilibrium state, like this when recovering the oil, all the time more than the oil-water interfaces after the gas injection, exploit, thereby improved oil well yield, with the remaining oil extraction in the buried hill, oil well the dead oil situation can not occur.
In addition, when constructing, the present invention need not newly bore producing well, only need utilize intra-field old well construction can realize recovering the oil, economical especially, but improve oil well productivity again within a short period of time, to have recovery ratio now and improve more than 15%, so this technology is particularly suitable for the buried hill oil reservoir moisture percentage and exploits at 95% oil well.
Description of drawings:
Accompanying drawing is an operating principle schematic diagram of the present invention.
Among the figure by 1, water termination of the preceding end of gas injection, 2, the oil-water interfaces behind the liter waterborne of the preceding end of gas injection, 3, the new produce oil water termination after the gas injection, 4, the gas section, 5, the oil section, 6, the water section, 7, gas injection well, 8, producing well forms.
The specific embodiment:
The present invention is provided by following examples, below in conjunction with accompanying drawing the present invention is described further.
Embodiment 1:
Among Fig. 1, reply oil reservoir physical parameter is selected earlier before the invention process, and this method is mainly used in carbonate buried hill, quartzy buried hill structural oil pool and the ligh-oil reservoir type.And lithology should be carbonate and quartzy buried hill and metamorphic rock (shallow particle rock migmatite, granulite, biotite shallow particle rock matter kataclastics).The buried hill hole has diaclase, cracked hole and micropore dual media are arranged in the crack, the oil reservoir shape is block buried hill, the OW that in the rock mass that the bottom, buried hill has end water to exist, is bored, and the former perforated interval of the old well of reply carries out shutoff before the construction, and according to construction requirement dead chick hole again, in addition, the OW of being exploited, its moisture content is more than 95%, promptly do not have at present and recover the oil when being worth, can select for use.Then, include the injection test of well section by 7 pairs of oil wells that are determined of gas injection well and go into 350 ℃ of hot airs, (this temperature is lower than former oil formation autoignition temperature) makes the oil-water interfaces 2 behind the liter waterborne of the preceding end of gas injection, force to move down into new produce oil water termination 3 positions of certain distance to the gas injection, promptly till the balance interface place.
Embodiment 2:
When buried hill oil pool is exploited, after embodiment one step is finished, recover the oil the reservoir on the new produce oil water termination 3 after the gas injection in OW, when the extraction process moves down as the new produce oil water termination 3 after gas injection occurring, be that producing well 8 exploitation can be taked when seeing the demonstration of gas by water injection well to buried hill bottom water filling means, original formation pressure has enough energy in the well to keep to carry out the oil-water interface adjustment.
Embodiment 3:
New produce oil water termination 3 determining positions after the gas injection of the present invention what of oil well produce oil, therefore it is most important to control the position at this interface well, new produce oil aerosphere face 3 after the described water filling is balance interface position by injecting into well＜350 ℃ of hot airs decisions, and new produce oil water termination 3 optimum positions after the gas injection should be controlled in the well of Yuan Laojing exploitation back that 2/3 place under the oil-water interfaces 2 is advisable behind the liter waterborne of the preceding end of gas injection.
Claims (2)
1, a kind of hot air filling balance oil recovery technique ' zhanqian ' mountain oil reservoir is characterized in that: described technology comprises the steps to finish:
One, at first buried hill oil storage rerum natura is selected:
The buried hill lithology is the carbonate quartzite, and in metamorphic rock (shallow particle rock matter migmatite, granulite matter kataclastics, biotite shallow particle rock matter kataclastics) the buried hill hole diaclase is arranged, the micropore dual media is arranged in the crack, the oil reservoir shape is block buried hill, and has end water to exist in the bottom, buried hill;
Two, well location is selected and is determined:
The present invention can select the buried hill oil reservoir to utilize OW in the existing oil field to carry out water filling gas injection and oil recovery and needn't bore new well, the former perforated interval of the old well of reply carries out shutoff before the construction, and according to construction requirement dead chick hole again, also to select in addition its moisture content of OW of being exploited at the oil well more than 95% as the construction well;
Three, the oil well that is determined is included the well section and inject hot air below＜350 ℃, force early stage buried hill in to move down into certain distance new produce oil water termination (3) position to the gas injection, promptly till the balance interface place because of the oil-water interfaces (2) of liter waterborne at the bottom of the gas injection;
Four, the buried hill oil reservoir is exploited:
After above-mentioned steps is finished, utilize the reservoir section on the new produce oil water termination after the gas injection in the OW to recover the oil again, as new produce oil water termination occurs and move down situation, can come oil-water interfaces are adjusted to buried hill oil pool bottom water flooding regime by offset well, have sufficient energy to keep original formation pressure.
2, a kind of hot air filling balance oil recovery technique ' zhanqian ' mountain oil reservoir according to claim 1, it is characterized in that: new produce oil aerosphere (3) face is tolerance how many controls of balance interface position height by new injection＜350 ℃ hot air after the described gas injection, before new produce oil water termination optimum position was controlled at the interior gas injection of former old well exploitation back well, 2/3 place of oil-water interfaces (2) was advisable behind the end liter waterborne.
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| CNB2006100463954A CN100398779C (en) | 2006-04-17 | 2006-04-17 | Hot air filling balance oil recovery technique 'zhanqian' mountain oil reservoir |
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| CNB2006100463954A CN100398779C (en) | 2006-04-17 | 2006-04-17 | Hot air filling balance oil recovery technique 'zhanqian' mountain oil reservoir |
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| CN1834403A true CN1834403A (en) | 2006-09-20 |
| CN100398779C CN100398779C (en) | 2008-07-02 |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102042010A (en) * | 2010-09-07 | 2011-05-04 | 中国石油天然气股份有限公司 | Method for determining development position of fractured-vuggy carbonate reservoir |
| CN104912537A (en) * | 2015-05-13 | 2015-09-16 | 中国海洋石油总公司 | Well network deployment method of giant thick fractured and buried hill reservoir |
| CN104989349A (en) * | 2015-07-31 | 2015-10-21 | 中国石油化工股份有限公司 | Constant-volume gas-injection well gas injection quantity design method |
| CN105089573A (en) * | 2015-07-21 | 2015-11-25 | 中国石油天然气股份有限公司 | Mining method for improving oil displacement efficiency of matrix and micro-fracture by dual-medium reservoir gas injection |
| CN105298452A (en) * | 2015-10-26 | 2016-02-03 | 中国石油天然气股份有限公司 | Oil reservoir three-dimensional gas injection method and well pattern structure |
| CN105863581A (en) * | 2016-05-11 | 2016-08-17 | 中国石油天然气股份有限公司 | Oil extraction method for controlling water and increasing oil of high-water-content oil well of buried hill oil reservoir |
| CN106321041A (en) * | 2015-06-26 | 2017-01-11 | 中国石油化工股份有限公司 | Later development method for reservoir production |
| CN107575191A (en) * | 2017-09-29 | 2018-01-12 | 中国石油大学(华东) | A kind of method of foam Assisted Gravity Drainage |
| CN112443300A (en) * | 2019-09-05 | 2021-03-05 | 沈阳烳汇科技有限公司 | Method for high-yield fractured buried hill oil reservoir |
| CN113622882A (en) * | 2021-09-06 | 2021-11-09 | 闫雪 | Air injection oil extraction equipment and oil extraction method for ancient buried hill oil reservoir |
| WO2023078433A1 (en) * | 2021-11-05 | 2023-05-11 | 北京红蓝黑能源科技有限公司 | Oil and gas exploitation method by injecting water into oil and gas reservoir water layer |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1465847A (en) * | 2002-06-28 | 2004-01-07 | 中国石油天然气股份有限公司 | Crude oil is mined by adopting a mode of firstly burning oil layer and then driving by steam |
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2006
- 2006-04-17 CN CNB2006100463954A patent/CN100398779C/en not_active Expired - Fee Related
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102042010B (en) * | 2010-09-07 | 2014-01-15 | 中国石油天然气股份有限公司 | Method for determining development position of fractured-vuggy carbonate reservoir |
| CN102042010A (en) * | 2010-09-07 | 2011-05-04 | 中国石油天然气股份有限公司 | Method for determining development position of fractured-vuggy carbonate reservoir |
| CN104912537A (en) * | 2015-05-13 | 2015-09-16 | 中国海洋石油总公司 | Well network deployment method of giant thick fractured and buried hill reservoir |
| CN104912537B (en) * | 2015-05-13 | 2017-10-03 | 中国海洋石油总公司 | A kind of well net deployment method of huge thick buried hill fracture reservoir |
| CN106321041A (en) * | 2015-06-26 | 2017-01-11 | 中国石油化工股份有限公司 | Later development method for reservoir production |
| CN106321041B (en) * | 2015-06-26 | 2019-02-01 | 中国石油化工股份有限公司 | A kind of later development method for oil reservoir exploitation |
| CN105089573A (en) * | 2015-07-21 | 2015-11-25 | 中国石油天然气股份有限公司 | Mining method for improving oil displacement efficiency of matrix and micro-fracture by dual-medium reservoir gas injection |
| CN104989349A (en) * | 2015-07-31 | 2015-10-21 | 中国石油化工股份有限公司 | Constant-volume gas-injection well gas injection quantity design method |
| CN105298452B (en) * | 2015-10-26 | 2018-05-04 | 中国石油天然气股份有限公司 | Oil reservoir three-dimensional gas injection method and well pattern structure |
| CN105298452A (en) * | 2015-10-26 | 2016-02-03 | 中国石油天然气股份有限公司 | Oil reservoir three-dimensional gas injection method and well pattern structure |
| CN105863581A (en) * | 2016-05-11 | 2016-08-17 | 中国石油天然气股份有限公司 | Oil extraction method for controlling water and increasing oil of high-water-content oil well of buried hill oil reservoir |
| CN107575191A (en) * | 2017-09-29 | 2018-01-12 | 中国石油大学(华东) | A kind of method of foam Assisted Gravity Drainage |
| CN112443300A (en) * | 2019-09-05 | 2021-03-05 | 沈阳烳汇科技有限公司 | Method for high-yield fractured buried hill oil reservoir |
| CN113622882A (en) * | 2021-09-06 | 2021-11-09 | 闫雪 | Air injection oil extraction equipment and oil extraction method for ancient buried hill oil reservoir |
| WO2023078433A1 (en) * | 2021-11-05 | 2023-05-11 | 北京红蓝黑能源科技有限公司 | Oil and gas exploitation method by injecting water into oil and gas reservoir water layer |
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| CN100398779C (en) | 2008-07-02 |
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