CN1076070C - Circulation-type microbial oil displacement and production method - Google Patents
Circulation-type microbial oil displacement and production method Download PDFInfo
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- CN1076070C CN1076070C CN97104311A CN97104311A CN1076070C CN 1076070 C CN1076070 C CN 1076070C CN 97104311 A CN97104311 A CN 97104311A CN 97104311 A CN97104311 A CN 97104311A CN 1076070 C CN1076070 C CN 1076070C
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Abstract
The present invention relates to a circulating microorganism displacement oil production method. By using the characteristic that microorganisms reproduced in a stratum layer and an oil layer can be discharged from a production well in the process of microorganism treatment in a petroleum production well, the microorganisms are injected into the oil layer from a water injection well by proper circulation process reform and design so as to realize the following effects: the discharged microorganisms are further used; the discharged microorganisms are new reproductive and are suitable for stratigraphic environment, so that the microorganisms can be better reproduced after injected; the present invention greatly improves the problem of a large amount of direct injection in various pure injection microorganism oil displacement schemes. Therefore, the present invention has the advantages of low production cost and convenient construction, and enhances the crude oil recovery ratio in an economic feasible mode.
Description
The present invention relates to a kind of method of from oil reservoir, recovering the oil, particularly utilize specific microorganism and to overlap the technological process of injecting, breed, migrating and 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 metabolite 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, belongs to the category of the on-the-spot said oil well in oil field " single well stimulation ".This oil production method also has following shortcoming except that " single well stimulation " active area is little: (1) needs to do the microorganism training by well; (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 to grow (about 20 days); (3) construction is too complicated.
U.S. Pat-4,446, after 919 propositions utilized CO2 to the oil effect, generation contained 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.
Current at present method is: if carry out microbial flooding, need to inject a large amount of microorganism or additive (CO from water injection well
2, nutrient solution etc.) or both inject the cost of production height together; If carry out microorganism " single well stimulation ", then its active area is big inadequately, thereby influences 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.And this method need not to inject nutrient solution, cost of production is low, site operation is simple, economical operation is reliable, be widely used.
The object of the present invention is achieved like this: a kind of circulation-type microbial oil displacement and production method, at least comprise that one is produced also and a water injection well, finishes whole process as follows: a) from production well, extract the oil water mixture that includes the microorganism that enters this oil reservoir breeding out; B) carry out water-oil separating in the separator on the ground; C) sewage that will contain mentioned microorganism injects the displacement of reservoir oil from water injection well or producing well; D) from production well, recover the oil.
Oil production method of the present invention is to utilize the microorganism that can breed 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, add microorganism before annotating.Be not that the effluent sewerage of all this system all can be recycled in the native system and goes.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 to annotate microorganism on the one hand to producing well or at water injection well, on the other hand microorganism that survive in the oil reservoir and constantly breeding is come out the back from water injection well re-injection oil reservoir from producing well, in water injection well, add microorganism and sewage simultaneously again.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 obtain volume increase, stable yields and improve recovery ratio partly.
2, separated by the output profit behind the microbial action after, 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 the stratum and work again from water injection well.
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, stable and reliable operation.
Describe working of an invention and effect in detail below in conjunction with accompanying drawing.
Fig. 1 is production well and a water injection well layout schematic diagram in the oil production method of the present invention;
Fig. 2 is a circulating system schematic diagram 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 that producing well 1 and water injection well 2 enter the numerical simulation result schematic diagram of the microbial reproduction degree of depth on stratum 3;
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 water injection rate 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.50 meters～300 meters of oil-water well distances.Fig. 2 represents the flow process of whole system.Wherein external water source can be clear water or qualified sewage.When water filling, add nutrient solution or microorganism.
Fig. 3 shows producing well 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.Add water and additional microorganism stoste this moment, mix 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 is illustrated in full oil field oilbearing stratum and sets up the large scale microbial field and recover the oil.
In above-mentioned each example, microorganism can be aerobic (generally needing to create nutritional condition), or amphimicrobian, or anaerobism.The microorganism that is added is the food source with the long-chain macromolecule in the crude oil.
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.
Just can produce a large amount of microorganisms by " list is also handled up " enters to circulate to drive and saves the microorganism consumption most.
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.Show five stratum (be greater than or less than this number and also belong to this patent category) among the figure, 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 represents to implement the sticking situation of change of cutting the oil property of curve and viscosity-temperature curve sign in back.Illustrate that performance of crude oils is constantly improved.Wherein, indivedual oil well oil property variation abnormality belong to normal.Microorganism is comprehensive 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.
Among Fig. 7 to Fig. 9, this block primary oil recovery was exploited 5 years below, exploited again 5 years with 2 oil recoveries, promptly began 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 output in mid-term and reach 80%, improves output 40% in the project later stage.
Fig. 8 represents the numerical simulation result of 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 represents the pore-body product of recovery ratio and 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 can obtain several effects 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 the 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 (8)
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: recover the oil from production well.
2. oil production method as claimed in claim 1 is characterized in that: extract the oil water mixture that comprises the microorganism that enters this oil reservoir breeding out from production well before and after, add microorganism in producing well.
3. oil production method as claimed in claim 1 is characterized in that: around a described production well, 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 to the distance of production well at 100 meters to 200 meters.
5. oil production method as claimed in claim 1 or 2 is characterized in that: described microorganism is anaerobism mushroom, facultative anaerobe, is the food source with the long-chain macromolecule in the crude oil.
6. oil production method as claimed in claim 1 or 2 is characterized in that: described microorganism is aerobic mushroom, when water injection well injects, injects nutrient solution simultaneously.
7. oil production method as claimed in claim 1 or 2 is characterized in that: during from the sewage of water injection well re-injection water-oil separating, add nutrient solution or microorganism simultaneously.
8. oil production method as claimed in claim 1 or 2 is characterized in that: during from the sewage of water injection well re-injection water-oil separating, can inject the sewage or the clear water that do not contain the standby external water pot of discharging microorganism simultaneously, 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 CN1164607A (en) | 1997-11-12 |
| CN1076070C true CN1076070C (en) | 2001-12-12 |
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Families Citing this family (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 |
| 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 |
| CN104234674B (en) * | 2013-06-21 | 2016-08-10 | 中国石油天然气股份有限公司 | The method and device that the circulation of a kind of microbial oil displacement production fluid is fermented with ground |
| CN104594862A (en) * | 2015-01-05 | 2015-05-06 | 西南石油大学 | Method of applying membrane bioreactor system to microbial oil production |
| 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 |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1038327A (en) * | 1988-04-19 | 1989-12-27 | B.W.N弗托尔·瑟夫科控股有限公司 | From oil reservoir, recover the oil |
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1997
- 1997-05-19 CN CN97104311A patent/CN1076070C/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1038327A (en) * | 1988-04-19 | 1989-12-27 | B.W.N弗托尔·瑟夫科控股有限公司 | From oil reservoir, recover the oil |
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