CN1164607A - Circulation-type microbial oil displacement and production method - Google Patents
Circulation-type microbial oil displacement and production method Download PDFInfo
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- CN1164607A CN1164607A CN 97104311 CN97104311A CN1164607A CN 1164607 A CN1164607 A CN 1164607A CN 97104311 CN97104311 CN 97104311 CN 97104311 A CN97104311 A CN 97104311A CN 1164607 A CN1164607 A CN 1164607A
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Abstract
The present invention relates to a cyclic microbial oil displacement and extraction method. It uses the characteristics of that the microbe reproduced in formation and oil-bearing formation can be discharged from production well, properly improves cyclic process to reinject the microbe into oil-bearing formation from water injection well so as to implement the following results: it can further use discharged microbe, the discharged microbe is newly-reproduced, and can better adapt to formation environment to implement good procreation, and can improve direct injection problem, so that said invented method is low in production cost, easy to implement, and can raise recovery efficiency of crude oil.
Description
The present invention relates to a kind of method of from oil reservoir, recovering the oil, particularly utilize the technological process of specific microorganism and a cover injection, breeding, migration and circulation to handle the oil production method that has producing well now and improve crude output and recovery ratio.Microorganism measure process cardinal principle is to utilize the material in the stratum to breed as the food source, in activities, utilize the discharge section re-injection that circulates again, the underground crude oil that touches microorganism is thinning or reduce viscosity or produce other component, makes the favourable variation of its physical and chemical performance can improve crude output and recovery ratio.This method also is applicable to many wells applicable to individual well.
Microorganism is injected oil well or well,, begin just to be familiar with to the degraded of oil or the method for self metabolism increase crude output or raising recovery ratio by microorganism, and patent documentation or paper report are arranged successively in the forties by people.
From disclosed patent or article, produce its metabolism product and only the metabolism product is injected the stratum with microbial fermentation if disregard on ground, so, can be divided into two kinds of type of skills substantially on operating principle: a kind of is to inject nutrient solution or microorganism (being called microbial flooding) from water injection well, another kind is to inject nutrient solution or microorganism from oil well, and oil recovery (being called " single well stimulation ") again drives a well after having an effect.
U.S. Pat-4,475,590 propose to inject nutrient solution from water injection well have growth of microorganism to stimulate formation crude.The US-4 in the same year, 450,908 propose behind the segmentation injection of polymer (Polymeric materials) and water, to add microorganism again from water injection well from water injection well.Thereafter US-4,905,761st, about from water injection well, microorganism being injected the patent on stratum with nutrient solution.US-5,163, No. 510 patents propose aerobic bacteria is injected from producing well, inject the method (belonging to " single well stimulation ") of oxygen simultaneously from water injection well.In addition, disclosed Chinese patent CN-1038327 in 1989 proposes to turn out microorganism from each mouthful oil well, and carry out the circulation of one or several nutrient restriction repeatedly by indoor, promptly make microorganism reach the best capillary purpose of reduction by adding or reducing (loss) some nutrients, (being in the oil well) annotates the oil return Tibetan from former well then.Basically the category that belongs to the on-the-spot said oil well in oil field " single well stimulation ".This oil production method also has following weakness (1) to need to do the microorganism training by well except that " single well stimulation " active area is little; (2) need also inject well to the indoor nutrient solution that works, consumption big (about 86 barrels), in addition microorganism and external nutrient solution reaction time long, require the closed-in time also to grow (about 20 is big); (3) construction is too complicated.
U.S. Pat-4,446,919 propose to utilize CO
2After the oil effect, generation contains the compound of N-and S-as anti-CO in oil reservoir
2The nutrient solution of microorganism, microorganism can be at CO
2Before, inject well afterwards or together.This patent proposes, if still contain nutrients in the output water, can under high pressure carry out oil, moisture from.Under high pressure water re-injection from water injection well, to stimulate the microorganism of having injected the stratum.The limitation of this patent is to use CO
2(be equivalent to CO
2Drive, CO need be arranged
2Source of the gas), N-in the dissolved oil and S-material (in the oil enough content must be arranged), what participate in circulation is not microorganism but residue N-and S-material in the water, its limitation is that also microorganism needs and CO
2Compatible, and be not subjected to CO
2The metal poisoning of stripping.
In a word, current at present method if carry out microbial flooding, all needs to inject a large amount of microorganism or additive (CO from water injection well
2, nutrient solution etc.) or both inject together, cost of production is too high.If microorganism carries out " single well stimulation " from oil well, but make the area of effect big inadequately, and influence ultimate recovery.
The objective of the invention is to overcome the defective of prior art, provide a kind of the injection to take from the circulation-type microbial oil displacement and production method of producing well microorganism from water injection well.
Further aim of the present invention is to provide a kind of need not substantially to inject nutrient solution, cost of production is low, site operation is simple, economical operation is reliable, widely applicable circulation-type microbial oil displacement and production method.
The object of the present invention is achieved like this: a kind of circulation-type microbial oil displacement and production method, at least comprise a producing well and a water injection well, it is characterized in that comprising the steps: a) from production well, extracting out the oil water mixture that includes the microorganism that enters this oil reservoir breeding; B) carry out water-oil separating in the separator on the ground; C) sewage that will contain mentioned microorganism injects this oil reservoir displacement of reservoir oil from water injection well; D) from production well, recover the oil.
Oil production method of the present invention is to utilize microorganism propagable microorganism in oil reservoir of discharging in the method for handling up, from production well comes out the stratum of back by the artificial same stratum of method re-injection or same well group/zone.Just in conjunction with the advantage of " microbial flooding " and " single well stimulation ", and avoided both shortcoming.In this zone, main oil well carries out microbiological treatment, and the microorganism that comes out is tried one's best under the situation of economy permission, is recycled in the water injection well independently.Wherein, if sewage or clear water that come in, that non-microorganism is discharged beyond the system arranged, should suitably add microorganism before annotating.Because on the engineering or economically, be not that the effluent sewerage of all this system all can be recycled in the native system and goes, this allows.For example, because the dehydration of various eliminators is not thorough, makes and take off that contained part water enters bigger system or other system in the crude oil of back.Above-mentioned situation still can reach purpose of the present invention.
The art of this patent is made up of two aspects, be that producing well is annotated microorganism or annotate microorganism in water injection well on the one hand, on the other hand the microorganism of survival in the oil reservoir and constantly breeding is injected from water injection well from the producing well back of coming out, add special simultaneously according to circumstances again or same microorganism is injected water injection well with sewage.The advantage of this patent method is as follows:
1. the oil well of all or part carries out " single well stimulation " or carries out water injection well and inject microorganism (microbial flooding), at first just can cause increasing production, stable yields and increase recovery ratio partly.
2. after being separated by the output profit behind the microbial action, oil is output, and a lot of microorganisms of new breeding constantly enter the sewage jar in water.As long as the flow process of this system's externally discharged waste water is changed into this intrasystem circulation re-injection.These microorganisms can be injected from water injection well again.
3. can change the relativeness between oil properties and the profit after these microorganisms are injected into, reduce residual oil saturation, thereby improve recovery ratio.Improving recovery ratio in theory can reach more than 8%.On-the-spot case is about 5%.Because of crude oil and formation condition change.
4. on-site construction operations is convenient, and cost of production is lower, and circular flow is reliable and stable.
Describe working of an invention and effect in detail below in conjunction with accompanying drawing.
Fig. 1 is the schematic diagram that production well and water injection well are arranged in the oil production method of the present invention;
Fig. 2 is the schematic diagram of the circulating system in the oil production method of the present invention;
Fig. 3 be in the oil production method of the present invention in the oil field or block edge " single well stimulation " discharge, concentrate water-oil separating again re-injection contain bacterium sewage well location schematic diagram;
Fig. 4 sets up the well location schematic diagram that extensive microbiological field recovers the oil at full oil field oilbearing stratum in the oil production method of the present invention;
Fig. 5 represents to enter the numerical simulation result schematic diagram of the microbial reproduction degree of depth on stratum 3 from producing well 1 and water injection well 2;
Fig. 6 A and 6B represent to implement the sticking change curve of cutting the oil property of curve sign in back;
Fig. 7 represents produce oil and produces water number value graph of simulation results figure;
Fig. 8 represents the numerical simulation result curve map of water injection rate and well water;
Fig. 9 represents the pore-body product of recovery ratio and water injection rate and the graph of relation of moisture content.
Among the figure: production well 1; Water injection well 2; Oil reservoir 3; Abducent biological respinse field 4; Water injecting pump 5; Separator 6; Sewage jar 7; Oil storage tank 8; Standby external water pot 9; Oil pumper 10; Multi-purpose station 16,17; Cluster oil well 1-1 ... n; Cluster water injection well 2-1 ... n;
See figures.1.and.2, Fig. 1 represents that producing well 1 uses the microorganism that handles up and discharge to inject from water injection well 2.Among the figure, producing well or water injection well can be a bite or many mouthfuls of wells.The oil-water well distance is not done requirement, generally is less than 300m, is good with 50～200m.The required time of circulating is short more good more.Fig. 2 represents the flow process of whole system.Wherein external water source can be external clear water or sewage.The crude oil of oil storage tank can not be 100% oil-containing, promptly can contain a spot of sewage.In water injection well, can add nutrient solution or microorganism according to circumstances on different opportunitys.
Fig. 3 represents producing well 1-1 ... 1-n uses " single well stimulation " and the profit of discharging, contain microorganism concentrates the back to separate, and changes water-injection station over to.Optionally add a spot of water and additional part microorganism stoste, mix and inject the water injection well displacement of reservoir oil.The relative position of well is not limited to diagram.There are part oil, well can not participate in circulation.
Fig. 4. be illustrated in full oil field oilbearing stratum and set up the large scale microbial field and recover the oil.These oil-water wells are arranged and can be comprised layout existing and that various actual development plan is in the future done.
In above-mentioned each example, microorganism can be aerobic (generally needing to create nutritional condition), or facultative, or anaerobism.The microorganism that is added more can survive in circulation and breed with anaerobism or amphimicrobe that the long-chain in the crude oil, big molecule are the food source.
In above-mentioned three kinds of mushrooms, more help on-site construction operations with amphimicrobe, and can under formation condition, survive and breed.
In the amphimicrobe, the bacterial classification that is the food source with the long-chain in the crude oil, big molecule is the best.
Can make " single well stimulation " in the producing well or not make " single well stimulation ", the latter needs to inject microorganism or nutrient solution at water injection well, makes it circulation then.
Wherein, to pass through adding a small amount of microorganism and nutrient solution less expensive in " single well stimulation " and the water injection well.
If only just reach the scheme of microorganism that a large amount of generations enter circulation for saving most the microorganism consumption by " single well stimulation ".
Fig. 5 represents to enter the numerical simulation result of the microbial reproduction degree of depth on stratum 3 from producing well 1 and water injection well 2.The degree of depth on both sides is not limited to illustrated ratio.Supposed five stratum in the simulation, reality can be not equal to this number.This result carries out radially grid dividing for 475 unit of 1/8th usefulness of five-point type oil-extraction method, the numerical simulation result after the using microbe circulation is driven about 1 year.
Fig. 6. the sticking situation of change of cutting the oil property of curve and viscosity-temperature curve sign in back is implemented in expression.Illustrate that performance of crude oils is constantly improved.Wherein, indivedual oil well oil property variation abnormality also belong to normal.Microorganism is a bulk properties to the effect of crude oil, and its effect monitoring also can be many-sided.Except that viscosity, also comprise density, the content of wax and production fluid, produce oil, aerogenesis, moisture etc. variation.
Fig. 7 to Fig. 9 below supposes that all this block exploited 5 years with primary oil recovery, exploits again 5 years with 2 oil recoveries, promptly begins to use the circulation-type microbial technology of reservoir sweep after operation on the 10th year.
Fig. 7 represents produce oil and produces water number value analog result.Show that original production rate decline curve is changed.With respect to decline curve, circulation-type microbial drives in the early stage can increase production 30%, can improve in mid-term to reach 80%, improves 40% in the project later stage.
Fig. 8. the numerical simulation result of expression water injection rate and well water.Although the expression aquifer yield improves slightly, the obvious decline of moisture content makes the oil well life-span prolong 2 years relatively.
Fig. 9. expression recovery ratio and the pore-body product of water injection rate and the relation curve of moisture content.It is about 5% to drive the moisture decline in back, and the moisture elongated or total output of time of 98% that reaches is improved, and ultimate recovery has improved about 8%.
Wherein, Fig. 7～9 are the result under the special parameter, and actual effect is not limited thereto.
Above-mentioned these effects have all improved ultimate recovery in itself.
So total effect is that oil well yield is improved or successively decreases and slows down or moisture decline (or arrive same the moisture time limit prolong) or ultimate recovery are improved, or wherein several effect can obtain simultaneously.
In addition,, or added that part nutrient solution part microorganism carries out oil, well circulates and drives, also belonged to the category of this patent 1. if when " single well stimulation ", only added the nutrient solution (content lacks than the method for driving) that activates the livings microorganism of formation crude.Equally, 2. if add a part of microorganism when being recycled into water injection well, or nutrient solution, or both or both and do not add, and remains the category of this patent.3. by 1. with 2. any combination, go into water injection well as long as microorganism that has utilized oil well " to handle up " to come out and artificial design make it re-injection, all be the category of this patent.
Claims (10)
1. a circulation-type microbial oil displacement and production method comprises a production well and a water injection well at least, it is characterized in that: extract the oil water mixture that includes the microorganism that enters this oil reservoir breeding from production well out; Carry out water-oil separating on the ground in the separator; The sewage that will contain mentioned microorganism injects this oil reservoir displacement of reservoir oil from water injection well; From production well, recover the oil.
2 oil production methods as claimed in claim 1 is characterized in that: extracting out from production well, comprising before and after the oil water mixture of the microorganism that enters this oil reservoir breeding, also can add an amount of microorganism in producing well.
3. oil production method as claimed in claim 1 is characterized in that; Around a described production well, to look the evolution case and be provided with one to several water injection wells, water injection well is not more than 300 meters apart from the distance of production well.
4. oil production method as claimed in claim 3 is characterized in that: described water injection well is to the distance of production well, is preferably in 100 to 200 meters the distance.
5. oil production method as claimed in claim 1 or 2 is characterized in that: described microorganism is the anaerobism mushroom.
6. oil production method as claimed in claim 1 or 2 is characterized in that: described microorganism is a facultative anaerobe.
7. as claim 5 or 6 described oil production methods, its spy is: described anaerobic bacteria or facultative anaerobe, with the long-chain in the crude oil, the bacterial classification that big molecule is the food source is for best.
8. oil production method as claimed in claim 1 or 2 is characterized in that: described microorganism is aerobic mushroom, when water injection well injects, should inject an amount of nutrient solution simultaneously.
9. as the described oil production method of one of claim 1 to 6, it is characterized in that: when the sewage after described water injection well re-injection water-oil separating, can add an amount of nutrient solution or microorganism simultaneously.
10. as the described oil production method of one of claim 1 to 6, it is characterized in that: when the sewage that returns from described water injection well after water-oil separating, can inject the sewage or the clear water that do not contain the standby external water pot of discharging microorganism simultaneously.Should suitably add microorganism before annotating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN97104311A CN1076070C (en) | 1997-05-19 | 1997-05-19 | Circulation-type microbial oil displacement and production method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN97104311A CN1076070C (en) | 1997-05-19 | 1997-05-19 | Circulation-type microbial oil displacement and production method |
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| CN1164607A true CN1164607A (en) | 1997-11-12 |
| CN1076070C CN1076070C (en) | 2001-12-12 |
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|---|---|---|---|
| CN97104311A Expired - Fee Related CN1076070C (en) | 1997-05-19 | 1997-05-19 | Circulation-type microbial oil displacement and production method |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102128011A (en) * | 2010-01-20 | 2011-07-20 | 烟台杰瑞石油开发有限公司 | Rock debris annulus reinjection device and control method thereof |
| CN102213087A (en) * | 2010-04-12 | 2011-10-12 | 北京大学 | Throughout and displacement combined microbial oil recovery method |
| CN102425398A (en) * | 2011-11-17 | 2012-04-25 | 中国石油化工股份有限公司 | Produced fluid circulating treatment method for microbial flooding |
| CN104234674A (en) * | 2013-06-21 | 2014-12-24 | 中国石油天然气股份有限公司 | Method and device for microbial oil displacement output liquid circulation and ground fermentation |
| CN104594862A (en) * | 2015-01-05 | 2015-05-06 | 西南石油大学 | Method of applying membrane bioreactor system to microbial oil production |
| CN116950625A (en) * | 2023-09-19 | 2023-10-27 | 克拉玛依市新易通生物科技有限公司 | Microorganism cold-position exploitation method and microorganism circulating injection and extraction system |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4971151A (en) * | 1988-04-19 | 1990-11-20 | B.W.N. Live-Oil Pty. Ltd. | Recovery of oil from oil reservoirs |
-
1997
- 1997-05-19 CN CN97104311A patent/CN1076070C/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102128011A (en) * | 2010-01-20 | 2011-07-20 | 烟台杰瑞石油开发有限公司 | Rock debris annulus reinjection device and control method thereof |
| CN102213087A (en) * | 2010-04-12 | 2011-10-12 | 北京大学 | Throughout and displacement combined microbial oil recovery method |
| CN102213087B (en) * | 2010-04-12 | 2014-02-19 | 北京大学 | Throughout and displacement combined microbial oil recovery method |
| CN102425398A (en) * | 2011-11-17 | 2012-04-25 | 中国石油化工股份有限公司 | Produced fluid circulating treatment method for microbial flooding |
| CN104234674A (en) * | 2013-06-21 | 2014-12-24 | 中国石油天然气股份有限公司 | Method and device for microbial oil displacement output liquid circulation and ground fermentation |
| CN104234674B (en) * | 2013-06-21 | 2016-08-10 | 中国石油天然气股份有限公司 | Method and device for microbial oil displacement output liquid circulation and ground fermentation |
| CN104594862A (en) * | 2015-01-05 | 2015-05-06 | 西南石油大学 | Method of applying membrane bioreactor system to microbial oil production |
| CN116950625A (en) * | 2023-09-19 | 2023-10-27 | 克拉玛依市新易通生物科技有限公司 | Microorganism cold-position exploitation method and microorganism circulating injection and extraction system |
| CN116950625B (en) * | 2023-09-19 | 2023-12-26 | 克拉玛依市新易通生物科技有限公司 | Microorganism cold-position exploitation method and microorganism circulating injection and extraction system |
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| CN1076070C (en) | 2001-12-12 |
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