CN101131084A - Method for promoting yield increase of oil well - Google Patents
Method for promoting yield increase of oil well Download PDFInfo
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- CN101131084A CN101131084A CNA2006100304498A CN200610030449A CN101131084A CN 101131084 A CN101131084 A CN 101131084A CN A2006100304498 A CNA2006100304498 A CN A2006100304498A CN 200610030449 A CN200610030449 A CN 200610030449A CN 101131084 A CN101131084 A CN 101131084A
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Abstract
The present invention relates to microbial oil well paraffin controlling technology, and is especially one microbial oil well paraffin controlling process for increasing output of oil well. The process includes the following steps: injecting mixture of 1 % concentration bacterial fermented liquid and 10 % concentration nutritious molasses in 150-300 cu m through the annular jacket space, injecting clear water in the amount of 2 times the annular jacket volume, closing the well for 10-20 days for the microbes to propagate in great amount and produce biopolymer through metabolism, and opening the well for producing petroleum.
Description
Technical field
The present invention relates to a kind of microbe oil production method technical field, be specifically related to a kind of method of utilizing microorganism to carry out the crude oil volume increase at the well deep part profile control.
Background technology
Microbe oil production is to utilize the useful activity of microorganism self such as degrading crude oil and/or metabolite such as biosurfactant, organic acid, alcohol to wait the oil recovery technique that improves oil recovery factor.
The microbe oil production technology is one and utilizes useful activity of microorganism and the integrated technology that metabolite improves oil recovery factor.Microbial single well treatment technology and Microbial-flooding Technology two big series have been formed at present.The clear wax control individual well of microorganism treatment technology is to utilize microbial inoculum to the degradation of paraffin and the surface-active of bacterial body and metabolite thereof, prevents or slow down the technology of production well pit shaft wax deposition.
King 541 areas are positioned at the hollow Southeastern Margin in the Dongying ox village, are the monoclinal structure of a structural line and fault line oblique.30 mouthfuls of oil wells of king's 541 fault blocks, average pore 1812%, original formation pressure 42162～48176MPa, pressure coefficient 1137～1156, viscosity of crude 8113～2013mPas, 32～37 ℃ at freezing point, paraffin content 10%～35%.Crude oil property is a low viscosity, high-solidification point, and the high content of wax, geology reservoir is that high pressure low permeability is saturating.Whole block is owing to hang down liquid measure, low moisture, the high content of wax, and the pit shaft wax deposition is serious, and wax deposition is more outstanding especially in the winter time, has had a strong impact on production.Only the well of lying that causes of wax card in 2002 just has 18 wells.The General Maintenance of this block launches around wax deposition in recent years, mainly contains ground conveyance system transformation, water mixing, heat and washes, examines measures such as pump, and wherein hot washing period is between 15～20 days, and high-pressure boiler car heat was washed 720 wells in 2002.So the urgent need expense is cheap, easy and simple to handle, outstanding effect wax control new technology is taken over heat and washed measure, to guarantee that oil well production is normal.
Summary of the invention
The purpose of this invention is to provide microorganism shutoff crack and high permeability zone in a kind of oil well, improve the method for crude output.
For achieving the above object, the technical scheme taked of the present invention is:
A kind of method that promotes oil well production increasing, this method is: mix the strain fermentating liquid of injection 1% and molasses nutrient solution 150～300m of 10% from the ring set space
3, replace to inject the clear water of 2 times of ring set volumes, closing well 10～20 days, treat that microorganism breeds metabolism output biopolymer in a large number after, ordinary production drives a well.
The well deep profile controlling is according to basic injection allocation amount, under the normal water filling situation, uses three-way valve to follow the water filling continuous stream to add bacterium liquid and molasses.Injection rate is respectively injection allocation amount 1% and 10%, recovers normal water filling production after annotating continuously 45～60 days.
Used strain fermentating liquid is oil reservoir origin bacterium CJ-02.
The water bacteria plugging profile control is that the bacterial classification of output biopolymer and molasses nutrient solution thereof are together injected oil reservoir, and bacterium is at underground breeding metabolism output biopolymer, shutoff crack and high permeability zone.Adjusting intake profile improves waterflooding effect, enlarges and involve zone (thereby raising crude output and recovery ratio.Oil field, Fuyu County tomography is many, and fracture development exists water filling to advance by leaps and bounds, the problem that waterflood efficiency is low.Use oil field, Fuyu County oil reservoir origin bacterium CJ-02 to carry out field test, inquire into the feasibility of water bacteria plugging profile control, the CJ-02 bacterium is nutrient matrix with the compound sugar, the water-insoluble biopolymer of metabolism output cellulose family.
The intake profile test result shows behind the water plugging and profile controlling, oil well 4J/#AJ3 substratum waterflooding effect obviously improves, well intake profile on laterally reaching has vertically all obtained adjustment, new felt area lightweight, low wax, low viscosity crude oil elder generation output behind the profile control, output behind heavy, the highly viscous crude, the well injection pressure increases the delay of # oil well tracer detection time before and after the test! Confirmed that all macrovoid venturi # high permeability formation is stopped up by the bacterium living beings polymer.
The specific embodiment
The present invention is further illustrated below in conjunction with the specific embodiment:
The water bacteria plugging profile control is that the bacterial classification of output biopolymer and molasses nutrient solution thereof are together injected oil reservoir, and bacterium is at underground breeding metabolism output biopolymer, shutoff crack and high permeability zone.Adjusting intake profile improves waterflooding effect, enlarges and involve zone (thereby raising crude output and recovery ratio.Oil field, Fuyu County tomography is many, and fracture development exists water filling to advance by leaps and bounds, the problem that waterflood efficiency is low.Use oil field, Fuyu County oil reservoir origin bacterium CJ-02 to carry out field test, inquire into the feasibility of water bacteria plugging profile control, the CJ-02 bacterium is nutrient matrix with the compound sugar, the water-insoluble biopolymer of metabolism output cellulose family.The well deep profile controlling is according to basic injection allocation amount, under the normal water filling situation, uses three-way valve to follow the water filling continuous stream to add bacterium liquid and molasses.Injection rate is respectively injection allocation amount 1% and 10%, recovers normal water filling production after annotating continuously 45～60 days.The well deep profile controlling is according to basic injection allocation amount, under the normal water filling situation, uses three-way valve to follow the water filling continuous stream to add bacterium liquid and molasses, and injection rate is respectively injection allocation amount 1% and 10%, and normal water filling production is recovered in the filling back continuously.Carry out oil well microbial water blockoff field test altogether, ignore the button that successively decreases, remove closing well and delay output, tiredly increase crude oil 14.8%, carry out well microorganism deep profile controlling field test altogether, water bacteria plugging profile control input-output ratio was greater than 1: 2.
Test back output liquid pH value descends, and the kind and the content of kind of bacterium and content # organic matter all increase considerably, and the relative amount of carbon dioxide increases in the output gas.Water ratio in oil well descends, the production fluid amount descends, and all presents the distinguishing feature of polymer water plugging and profile controlling.The purpose bacterium detects probability and content is big in the output liquid, presents tangible decreasing water cut and increasing oil trend, and the size of oil increment detects content with the purpose bacterium and is directly proportional.Oilwell water shutoff period of validity 9 months, moisture content or production fluid amount descend 59%, well deep profile controlling period of validity September.Block year, comprehensive water cut on average descended 45～65%, and purpose bacterium and nutrient solution molasses thereof inject low, the insufficient infusion of content, by excess dilution, was the subject matter that test exists in oil reservoir, also be can not more effective water plugging and profile controlling main cause.The intake profile test result shows behind the water plugging and profile controlling, and oil well 6+4/3+7 substratum waterflooding effect obviously improves, and well intake profile on laterally reaching has vertically all obtained adjustment.New felt area lightweight, low wax, low viscosity crude oil elder generation output behind the profile control, output behind heavy, the highly viscous crude.The increase of well injection pressure, oil well tracer detection time postpone before and after the test, have confirmed that all macrovoid venturi # high permeability formation is stopped up by the bacterium living beings polymer.
Claims (2)
1. method that promotes oil well production increasing, this method is: mix from the ring set space and inject 1% strain fermentating liquid and molasses nutrient solution 150～300m of 10%
3, replace to inject the clear water of 2 times of ring set volumes, closing well 10～20 days, treat that microorganism breeds metabolism output biopolymer in a large number after, ordinary production drives a well.
2. as the method for the said promotion oil well production increasing of claim 1, it is characterized in that: used strain fermentating liquid is oil reservoir origin bacterium CJ-02.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2006100304498A CN101131084A (en) | 2006-08-25 | 2006-08-25 | Method for promoting yield increase of oil well |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2006100304498A CN101131084A (en) | 2006-08-25 | 2006-08-25 | Method for promoting yield increase of oil well |
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| CN101131084A true CN101131084A (en) | 2008-02-27 |
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| CNA2006100304498A Pending CN101131084A (en) | 2006-08-25 | 2006-08-25 | Method for promoting yield increase of oil well |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103132986A (en) * | 2013-02-05 | 2013-06-05 | 中联煤层气国家工程研究中心有限责任公司 | Method for measuring liquid production capacities of different reservoir stratums of coal-bed gas well |
| CN110593833A (en) * | 2019-09-04 | 2019-12-20 | 中国石油化工股份有限公司 | Simulation method for improving recovery ratio by microbial flooding |
-
2006
- 2006-08-25 CN CNA2006100304498A patent/CN101131084A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103132986A (en) * | 2013-02-05 | 2013-06-05 | 中联煤层气国家工程研究中心有限责任公司 | Method for measuring liquid production capacities of different reservoir stratums of coal-bed gas well |
| CN103132986B (en) * | 2013-02-05 | 2016-06-15 | 中联煤层气国家工程研究中心有限责任公司 | A kind of method of the Liquid output of the different reservoir measuring coal bed gas well |
| CN110593833A (en) * | 2019-09-04 | 2019-12-20 | 中国石油化工股份有限公司 | Simulation method for improving recovery ratio by microbial flooding |
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Application publication date: 20080227 |