CN101988381A - Method for removing oil well blockage by using acid forming bacterium - Google Patents
Method for removing oil well blockage by using acid forming bacterium Download PDFInfo
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- CN101988381A CN101988381A CN2010102533159A CN201010253315A CN101988381A CN 101988381 A CN101988381 A CN 101988381A CN 2010102533159 A CN2010102533159 A CN 2010102533159A CN 201010253315 A CN201010253315 A CN 201010253315A CN 101988381 A CN101988381 A CN 101988381A
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Abstract
The invention relates to a method for removing oil well blockage by using an acid forming bacterium. The technical scheme comprises that: fermentation culture is performed on an acid forming bacterium, such as bacillus stearothermophilus SH-1, Bacillus pumilus AH-1 and Bacillus cereus SW-2 which is suitable for oil reservoir environment; fermentation liquor and an activating agent are injected into the oil reservoir; the acid forming bacterium and the generated enzymes and active ingredients can peel off and degrade oil dirt, and a protective film is formed on the rock to stabilize the rock; besides, the generated organic acid corrodes rock in channels and improves the permeability of the reservoir so as to fulfill the aim of activating the capacity of an oil well. The method has the advantages that: the processing technology is reasonable; the method is convenient to operate, has low corrosion and low comprehensive cost, is environment-friendly and the like; and problems of blockage of oil layers, capacity reduction and water injection reduction are solved in the oil exploiting process; and the method is suitable for acidification in the oil exploiting process in the oil industry, and has the effects of removing the blockage and improving permeability of the substrate.
Description
One, technical field:
The present invention relates to a kind of microorganism solution and remove the technology that oil well stops up, particularly a kind of acid-producing bacteria that utilizes is removed the method that oil well stops up.
Two, background technology:
In the oil extraction process, organic deposition and inorganic scale composite deposition, formation fines migration, hydration and expansion of clay etc. can cause adjacent to oil well area to stop up, and cause production capacity to reduce.Acidifying is the main technique that oilfield oil well underground work solves blockage problem, but there is different toxicity in acidification liquid, and the corrosivity height.Its exterior liquid all has certain harm to environment and biology, must suitably handle, thereby strengthen operating cost.
Three, summary of the invention:
Purpose of the present invention is exactly the above-mentioned defective that exists at prior art, provide a kind of acid-producing bacteria that utilizes to remove the method that oil well stops up, be applicable to the oil well that incrustation stops up, increase oil well productivity by removing obstruction and increasing stratum permeability, be that a kind of oil well output that can make increases, reduce the clearer production technology that acid solution is returned row again.
Its technical scheme is that the method for utilizing acid-producing bacteria to remove the oil well obstruction is made up of following steps:
(a), the fermenting and producing of acid-producing bacteria liquid; Utilize fermentation medium to carry out fermenting and producing the acid-producing bacteria production department on the ground that is fit to the reservoir geology environment;
(b), acid-producing bacteria zymotic fluid and activator inject oil a surname; The zymotic fluid that production is finished and the activator of preparation are injected in the oil reservoir by injected system;
(c), the breeding metabolism of acid-producing bacteria; Oil reservoir is considered as a fermentation reactor, and under reservoir temperature, pressure condition, acid-producing bacteria ferments in this fermentation reactor of oil reservoir, breeds, metabolism products such as the enzyme of bacterium and secretion thereof, activating agent material will react with incrustation, remove and stop up, the mediation seepage channel increases oil production;
(d), water filling water drive crude oil: fermentation reaction is after a period of time in oil reservoir for acid-producing bacteria, and the crude oil after handling by the acid-producing bacteria in the mode displacement oil reservoir of water filling again improves oil well productivity, realizes steady oil control water.
The detailed step of the fermenting and producing of above-mentioned step (a) refers to utilize one of described fermentation medium that acid-producing bacteria (mixed bacterial that bacillus stearothermophilus (Bacillus stearothermophilus) SH-1, bacillus pumilus (Bacillus pumilus) AH-1, Bacillus cercus (Bacillus cereus) SW-2 form according to 1: 1: 1 ratio) is carried out fermenting and producing under 35～45 ℃, make its growth and metabolism reach best period, bacterium liquid density 10
8Individual/more than the mL;
Wherein, described fermented and cultured based component: (a), 0.3% glucose, 0.3% peptone, 0.3% dusty yeast, 0.5% sodium chloride, 0.3% dipotassium hydrogen phosphate, all the other compositions are water; (b), 5% cornstarch hydrolyzate, 0.5% ammonium nitrate, 0.5% sodium chloride, 0.3% dipotassium hydrogen phosphate, all the other compositions are water.
Above-mentioned step (b) is that the zymotic fluid of acid-producing bacteria and activator are injected in the oil reservoir by injected system, and reservoir temperature is 30～90 ℃; Activator is meant the requirement preparation according to acid-producing bacteria growth and metabolism, for growth metabolism replenishes the energy;
Above-mentioned injection activator composition: 0.5% glucose, 0.4% peptone, 0.4% dusty yeast, 0.6% urea, 0.2% ammonium dihydrogen phosphate (ADP), all the other compositions are water.
The invention has the beneficial effects as follows: treatment process of the present invention is reasonable, has advantages such as easy to operate, that corrosion is low, characteristic of environmental protection good, integrated cost is low, has fully solved in the oil exploitation process, because the obstruction of pool, output descends, the difficult problem that water filling descends.The present invention is applicable to the acidizing treatment in the petroleum industry oil recovery, has the obstruction of removing and increases the infiltrative effect of matrix, and be the production technology of a cleaning.
Four, the specific embodiment:
In the oil exploitation process, because aspects such as the reduction of strata pressure, temperature, the crude oil degassing cause the obstruction to oil reservoir such as heavy hydrocarbon, inorganic salt crust, output is descended, water filling descends.Utilize acid-producing bacteria and metabolite thereof and oil reservoir effect will help de-plugging of well, improve oil well productivity.The method of utilizing acid-producing bacteria to remove the oil well obstruction is made up of following steps:
(mixed bacterial of bacillus stearothermophilus (Bacillus stearothermophilus) SH-1, bacillus pumilus (Bacillus pumilus) AH-1, Bacillus cercus (Bacillus cereus) SW-2 is formed mixed bacterial according to 1: 1: 1 ratio at first will to be fit to the product acid of reservoir media; ) (0.3% glucose, 0.3% peptone, 0.3% dusty yeast, 0.5% sodium chloride, 0.3% dipotassium hydrogen phosphate, all the other compositions are water to utilize one of fermentation medium under 35～45 ℃; 5% cornstarch hydrolyzate, 0.5% ammonium nitrate, 0.5% sodium chloride, 0.3% dipotassium hydrogen phosphate, all the other compositions are water.) carry out fermented and cultured, making the bacterium liquid density of zymotic fluid is 10
8Individual/as more than the mL, then zymotic fluid to be crossed injected system and be injected in the oil reservoir, simultaneously with the preparation the bacterium activator (0.5% glucose, 0.4% peptone, 0.4% dusty yeast, 0.6% urea, 0.2% ammonium dihydrogen phosphate (ADP), all the other compositions are water.) also the annular space by oil pipe and sleeve pipe be injected in the oil reservoir, closing well is 10～15 days then, make acid-producing bacteria and metabolite thereof in oil reservoir fully the reaction.
The acid-producing bacteria that injects oil reservoir can be that the energy and carbon source are bred growth with activator and crude oil at this natural fermentor of oil reservoir.Bacteriogenic organic acid is with some mineral matter of corrosion on the one hand, and expandable pores is shouted, and improves the permeability of reservoir; Enzyme of Chan Shenging and active material can be peeled off grease, degrade from obstruction on the other hand, recover the permeability of reservoir.This two aspect interacts and can make oil stream quick coalescence in water drive, forms continuous oily wall by pore throat, thereby improves oil well productivity.The active material that acid-producing bacteria produces can also form certain thickness diaphragm on the reservoir rocks top layer, can suppress sand, prevent fine migration, plays the effect of stablizing rock, can prolong the time that dirt deposits once more.The zymotic fluid of acid-producing bacteria and activator regular replenishment are injected oil reservoir, make bacterium continue the breeding growth under reservoir media, its metabolite also just can be constantly and incrustation have an effect and solve the oil-water well blockage problem, thereby the activation oil well productivity.At present, the technology of utilizing this acid-producing bacteria to remove the oil well obstruction has been implemented 3 mouthfuls of oil wells, and the construction success rate is that 100%, 3 mouthful of oil well is all seen effect preferably, and efficient is 100%, and accumulative total increases 1335 tons of oil, and details is as shown in the table.
Table 1 acid-producing bacteria is separated plug technique effect statistics
Claims (3)
1. one kind is utilized acid-producing bacteria to remove the method that oil well stops up, and it is characterized in that being made up of following steps:
(a), the fermenting and producing of acid-producing bacteria liquid; Utilize fermentation medium to carry out fermenting and producing the acid-producing bacteria production department on the ground that is fit to the reservoir geology environment;
(b), acid-producing bacteria zymotic fluid and activator inject oil reservoir; The zymotic fluid that production is finished and the activator of preparation are injected in the oil reservoir by injected system;
(c), the breeding metabolism of acid-producing bacteria; Oil reservoir is considered as a fermentation reactor, and under reservoir temperature, pressure condition, acid-producing bacteria ferments in this fermentation reactor of oil reservoir, breeds, metabolism products such as the enzyme of bacterium and secretion thereof, activating agent material will react with incrustation, remove and stop up, the mediation seepage channel increases oil production;
(d), water filling water drive crude oil: fermentation reaction is after a period of time in oil reservoir for acid-producing bacteria, and the crude oil after handling by the acid-producing bacteria in the mode displacement oil reservoir of water filling again improves oil well productivity, realizes steady oil control water.
2. the acid-producing bacteria that utilizes according to claim 1 is removed the method that oil well stops up, it is characterized in that: the detailed step of the fermenting and producing of described step (a) refers to utilize one of two kinds of fermentation mediums that acid-producing bacteria is carried out fermenting and producing under 35～45 ℃, make its growth and metabolism reach best period, bacterium liquid density 10
8Individual/more than the mL;
Wherein, the mixed bacterial formed according to 1: 1: 1 ratio by bacillus stearothermophilus, bacillus pumilus, Bacillus cercus of described acid-producing bacteria;
Described two kinds of fermentation mediums are made by following composition respectively: (a), 0.3% glucose, 0.3% peptone, 0.3% dusty yeast, 0.5% sodium chloride, 0.3% dipotassium hydrogen phosphate, all the other compositions are water; (b), 5% cornstarch hydrolyzate, 0.5% ammonium nitrate, 0.5% sodium chloride, 0.3% dipotassium hydrogen phosphate, all the other compositions are water.
3. the acid-producing bacteria that utilizes according to claim 1 is removed the method that oil well stops up, and it is characterized in that: described step (b) is that the zymotic fluid of acid-producing bacteria and activator are injected in the oil reservoir by injected system, and reservoir temperature is 30～90 ℃; Activator is meant the requirement preparation according to acid-producing bacteria growth and metabolism, for growth metabolism replenishes the energy;
Described injection activator composition: 0.5% glucose, 0.4% peptone, 0.4% dusty yeast, 0.6% urea, 0.2% ammonium dihydrogen phosphate (ADP), all the other compositions are water.
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| CN2010102533159A CN101988381A (en) | 2010-08-07 | 2010-08-07 | Method for removing oil well blockage by using acid forming bacterium |
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| CN2010102533159A CN101988381A (en) | 2010-08-07 | 2010-08-07 | Method for removing oil well blockage by using acid forming bacterium |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103114833A (en) * | 2011-11-17 | 2013-05-22 | 中国石油化工股份有限公司 | Microbe oil extraction method for activating oil deposit deep portion function flora |
| CN107165611A (en) * | 2017-06-27 | 2017-09-15 | 中国石油化工股份有限公司 | A kind of method that poorly efficient oil well microbial single well stimulation of low yield recovers the oil |
| US10907106B2 (en) * | 2017-06-21 | 2021-02-02 | Locus Oil Ip Company, Llc | Treatment for upgrading heavy crude oil |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1992015771A1 (en) * | 1991-03-04 | 1992-09-17 | Archaeus Technology Group Ltd | Enhanced oil recovery |
| CN101131080A (en) * | 2006-08-25 | 2008-02-27 | 上海中油企业集团有限公司 | Oil production method with microbial single well stimulation |
-
2010
- 2010-08-07 CN CN2010102533159A patent/CN101988381A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1992015771A1 (en) * | 1991-03-04 | 1992-09-17 | Archaeus Technology Group Ltd | Enhanced oil recovery |
| CN101131080A (en) * | 2006-08-25 | 2008-02-27 | 上海中油企业集团有限公司 | Oil production method with microbial single well stimulation |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103114833A (en) * | 2011-11-17 | 2013-05-22 | 中国石油化工股份有限公司 | Microbe oil extraction method for activating oil deposit deep portion function flora |
| CN103114833B (en) * | 2011-11-17 | 2015-06-24 | 中国石油化工股份有限公司 | Microbe oil extraction method for activating oil deposit deep portion function flora |
| US10907106B2 (en) * | 2017-06-21 | 2021-02-02 | Locus Oil Ip Company, Llc | Treatment for upgrading heavy crude oil |
| US11441082B2 (en) | 2017-06-21 | 2022-09-13 | Locus Oil Ip Company, Llc | Treatment for upgrading heavy crude oil |
| CN107165611A (en) * | 2017-06-27 | 2017-09-15 | 中国石油化工股份有限公司 | A kind of method that poorly efficient oil well microbial single well stimulation of low yield recovers the oil |
| CN107165611B (en) * | 2017-06-27 | 2019-04-02 | 中国石油化工股份有限公司 | A kind of method that the inefficient oil well microbial single well stimulation of low yield recovers the oil |
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Application publication date: 20110323 |