第七届全国渗流力学学术讨论

1、24第七届全国渗流力学学术讨论This paper consists of 36832745 contributionsPdf documents may experience poor browsing on the WAP side. It is recommended that you first select TXT, or download the source file to the local view.The third volume supplement 4Journal of University of Science & Technology ChinaVl4po3Sp.

2、UIn 2004 8JUNLUIESYSICADHOOYCIAg24 month ORAONVRIOCNETCNLGOHA.0FTFENEFNu0Article number: 5-7 (04 increase 3037820) 0962210Experimental study on factors affecting oil recovery in microbial floodingHuang Lixin, Wu Qinghong, Li Li, Yu Liu(Academy of Sciences, Research Institute of Seepage Fluid Mechani

3、cs, Hebei, Langfang 050, China) 607Abstract: Based on the laboratory for Huabei Oilfield Kazakhstan 22 fault block oil samples of microbial flooding experiments, the effects of microorganisms, bacteria concentration, microbial slug size and core permeability and other factors on the oil displacement

4、 effect. The results show that in the 7 kinds of bacteria experiment, bacteria metabolic type large the effect on oil displacement, strain and biological metabolism of polymer composite strain flooding effect is good, only the poor effect of live bacteria metabolism table. The higher the concentrati

5、on of microbial agent, bigger plug, oil displacement effect better. This paper also examines the penetration rate effects on oil displacement effect of microorganisms, the permeability is too large, flooding effect is not necessarily good, may be the cause of microorganisms from water flooding forma

6、tion channel channeling, residual oil after water flooding and can not be effective.Key words: oil recovery rate of micro bond 4; received 9CLC number: E5.T379, document identification code: A0 Introduction microbial oil recovery technology is a kind of production increasing technology which can imp

7、rove oil well production by using microorganisms own reproduction and its metaboliteOperation, the technique is known as microbial enhanced oil recovery (ER.MO) it is through microbial injection formation screening, microbial migration, formation in breed, produce metabolites can reduce the saturati

8、on of oil formation in the breeding process, including organic acid, surfactant and polymer molecular biology etc. material. Gas, microbial recovery mechanism is very complex, because of its metabolites, the mechanism is not the same. The biological macromolecular mucin producing microorganisms in b

9、reeding process of the dense, selective or non selective pores or high permeability layer of the stratum, so as to change the direction of liquid flow and expand the swept volume. The surfactant produced by microbial metabolism is the main function of the lower water rock oil The interfacial tension

10、 and improve the displacement efficiency; microbial fermentation to produce organic acids on the one hand can play the role of cleaning the wellbore and formation, on the other hand, with some alkaline substances can also produce surfactant.The effect of gas produced by microbial fermentation on the

11、 performance of expansion bombUnder the driver died within the pores of oil, and can remove debris within the pores, to restore the permeability of the formation. The microbial liquid composition is very complicated, both microbial, and its metabolites, because the microorganism itself species, its

12、metabolite composition is very complicated. Although there is a certain understanding to improve the oil recovery mechanism of microorganisms, but the main components of oil recovery with no one studied. High water content and heterogeneous reservoirs is the most widely used oil reservoir microbial

13、flooding, microorganisms in thisThe displacement effect in the reservoir directly affects the yield increasing effect of the microorganism. In this study, it mainly connects with the two Erlian Oilfield in North China2 the parameters of T oil formation in block 2I were simulated by microbial floodin

14、g testAbout 16 years old, male, 79 engineer, research direction: heavy oil production, three oil recoveryOne hundred and fourJournal of University of Science & Technology ChinaThirty-fourth volumesThe T oil formation of 2 ha 2 fault block in Huabei Erlian Oilfield has the characteristics of high vis

15、cosity, I, high plasticity and asphaltene, and it has been injected for a period of time. The two oil deposits are of high viscosity, high viscosity and high strengthWater development, production effect is getting worse, water cut rises rapidly, rapid production decline, water breakthrough after und

16、erground oil saturation is high, it is necessary to take measures to improve the level of the block oil recovery. The Kazakhstan 2 faulted reservoir research found that 2 of the block oilHigh porosity, medium permeability, interlayer and in layer heterogeneity is not serious, the temperature of oil

17、medium, primary reservoir water salinityLow, at home and abroad successfully carried out the MOER data after a comparative study of the block that it suits to carry out microbial flooding. Aiming at the 2 fault block oil reservoir properties and characteristics of crude oil, 2 carried out the experi

18、mental study of MOER. The effects of different kinds of microbial EOR. Through sand filling model and artificial core two the different permeability of porous medium, studies the influence of permeability of porous media on simulation experiment of oil displacement effect. The results showed that th

19、e bacteria strains by compound and metabolic biopolymer flooding has good ability. The higher the concentration of bacteria liquid injection, bigger plug, oil displacement effect is better, but the penetration rate is too high flooding, but not good, the main reason is the microorganism from water f

20、looding formation channel channeling, residual oil after water flooding and can not effectively Action1 experimental method11 microbial fluid. First of all, according to the physical properties and oil and water data of HA 2 fault block oil reservoir, 2, through the viscosity reduction of crude oil,

21、 the growth curve of bacteria and temperature resistanceIn terms of tests, we screened seven kinds of bacteria and carried out 1 sets of experiments: 1, 1, 1, and S, 1, 1. 3, 0l416b2. 2, one 1yypFSo4, one, 7, in which L - and L - a mixture of bacterial fluid, one for the production of polymer bacter

22、ia, and F belong to the production of acid, 32.F. Yy64b2ySooGas producing and surfactant producing bacteria12 experimental model. In the flooding simulation experiment, the sand filling model and the artificial core are used to carry out the oil displacement experiment: the core is made of quartz sa

23、nd and artificial sinteringThe heart size rock diameter 2c, length 8C.m, the core permeability difference is very small, the permeability of 50m in 7x 881 - 5000x3 range of sand filling model by diameter is 1C, 0, 0ML. 1, 3c8mm stainless steel tube long straight. The 01 stone fill 8 6 0 sand, throug

24、h the forest in 3x Z right. The infiltration rate of 01 M group left 00 01113 experimental conditionsKazakhstan 2 fault block oil temperature is 5 DEG C, so all 21 displacement experiments are for the.1 experiment at 5 DEG C in Kazakhstan for the 2 block of crude oil, 125 DEG C for the 1.as viscosit

25、y injection water in Kazakhstan 2 faulted reservoir water data preparation, 62.8mP2?The total salinity is 4. /.6mg, aC3568L is NH0, the reference water injection rate of the oilfield is high, and the displacement test speed in the laboratory is greatAbout 02mi after water flooding injection of bacte

26、ria liquid,.5nUm. injection amount is about 05,.P due to the injection of 05V.PV, in the model of export have bacteria.14 experimental procedures were observed. And the general solution of EOR flooding experiment steps similar to that of saturated water, bound water to build water flooding, water fl

27、ooding water content to the limit, then the injection of bacteria liquid, closed at both ends of the export model, in the experiment temperature and then placed 7 days, water flooding. Calculation of different injection stage of recovery and the change of water content and the displacement pressure

28、changes in the process.2 results and analysisThe effect of 21 strains on oil recovery, although microbial fluid has a variety of effects on EOR, due to different strains, microbial reproduction and metabolic productionThe composition of the substance is different, and its effect on crude oil may be

29、different. Among them, S, oFoy and B are the bacterial colonies in the liquidThe number was 1 / Ly60m, while l was 80, 8, 1 and three of the 17001 concentrationsSuppl.Experimental study on factors affecting oil recovery in microbial floodingAs a result, a comparative experiment was carried out, i.e.

30、, after the water flooding reaches 9% of the ultimate moisture content, 8 closes the two ends of the modelMouth, placed in the experimental temperature for 7 days, and then carried out water flooding.1 table for different microbial fluid displacement test dataTable 1 experimental results of microbia

31、l fluid flooding Tb1hdpcmneiecidfetticlra.他是一个新概念。模型号4 4 3 4一一4 4 3 6 4 4一一一3一3 4 4 3 5 4 4一一一3一7 4 4 3 8一一4 9水驱采收率%五点九一三4 9 9. 5，5 35、】”且、注菌后后续水驱采收率%采收率%6. 3 2 1 6. 9 27 5. 8 41采收率增加%1 01 1菌液L一Y 6五十四点五四四3 77。89% 74我一Y 42 5。01、一1 6% Y。1。%，6 00 2 1 2一h0b一P B一Y 22 21O72 2一、以1 1。，1五点六五四6 5. 1 3 3 1零凡五点

32、六八一六点六六三2，1，6，8. 41，1，00，19. 5，18. 6，4. 8，0，2. 3，35 6三十六五J）如果0少0, 0且、4 64 4 3 9一一4 4 3 1 0一一4内四十八四七4八J.J九十八四四月1 4F O一231 F O一2 6 2S O一2 4 34 24 4 3 1一一4 4 3 2一一LL 4 J五十九四十五内U R4 6 6. 7 5. 2 86七十四五十六2菌种对采收率的影响表T 2 h D P厘米n EIEC我D E N BC RL我。E L E ET C纽约我R T TI SA S T我的FI N E E T N F R岩心号水驱采收率微生物驱采收率%

33、十三6 6：采收率增加%1 7 0. 4菌液我一Y 6B 2 Y一主要代谢物表活剂、聚合物、酸、聚合物、酸4 4 3 4. 9 5 3 1一一4 4 3 8. 6 5 3 6一一44, one, 3, one, 9.844644, one, 3, one, 13904.8Three hundred and sixty-four thousand three hundred and seventy-four110.X4R19.5So one, 2, one, 2, one, 1L8.6Fo one, 2, one, 3, one, 1Surface active agent, gasSurfac

34、e active agent, gas acid,From the data in Table 1 can be seen, although the core water flooding recovery are different, but because of the high oil viscosity, moisture limit, oil recovery of blank test is not high in the 4 -.437 on the core that, even if not note microorganism, stop water flooding a

35、fter a period of time again, water flooding, oil recovery rate is increased to a certain extent,.4 is mainly due to the 21% cores of residual oil distribution results. 221F 111 S 111, S 111, o243 231 and three kinds of bacterium after o injection compared with water flooding, water flooding recovery

36、 experiment, basically no change, only F 111 o262 after injection of bacteria liquid recovery increased, overall, a difference of.B bacteria liquid flooding this a class of bacteria, for Y2 under the same conditions, the recovery rate is increased by 1%, 0 increase in the blank there are still 78% o

37、f the recovery. The value of.6 in blank experiments, B with y bacteria liquid flooding, oil recovery of 2 and 68%. A l and l6y experimental results show that this Y4 two kinds of bacteria have a good effect of increasing oil, microbial flooding after recovery increases 1.407% respectively. 1.618%. a

38、nd table 2 were used to compare the oil displacement results of different metabolites, and the results of the 2 table showed that the ability of the fluid to improve oil recovery was better than that of the liquid cultureOne hundred and twenty-fourJournal of University of Science & Technology ChinaT

39、hirty-fourth volumesHave a great relationship. Xie biopolymer producing B bacteria and mixed bacteria liquid L and l oil displacement effect is very good y2y6y4, and the yield of acid and surfactant F and S bacteria liquid flooding effect is relatively poor for a.Oo B Y2 bacteria liquid, its metabol

40、ites are mainly biological from the results of that polymer. Three element compound, biopolymer xanthan gum is a kind of good chemical tackifier, its viscosity is much higher than the viscosity of water, it can reduce the water oil mobility ratio, increase the sweep efficiency, enhance oil displacem

41、ent efficiency.With chemical flooding is different in chemical flooding of xanthan gum is on the ground after the fermentation injection formation, and microbial flooding, biological polymers are produced in microbial fermentation liquid conditions such as temperature and pressure of the formation.

42、In the absence of pre fermentation, injection of bacteria liquidVery well, in the formation of microbial metabolism produced polymer, the viscosity of the bacteria fluid increased, the seepage resistance increased, so that the subsequent injection of water to the area of high oil saturationB 2Y used

43、 in the study of bacteria in the oil temperature of reproductive culture experiments, metabolism of viscous material, the analysis of xanthan gum, after bacteria liquid and metabolites of viscosity 1.P.714asm, its viscosity is much higher than that of water, water in the subsequent process, the two

44、core end pressure obviously the first time is higher than that of water flooding at the end of the pressure, indicating that B 2Y bacteria producing high viscosity biological polymers to reduce the mobility ratio, improve the production effect, for theAs a very effective.2 2 fault block reservoir re

45、coveryL y is the three kinds of bacteria was y and L46, which contain both surfactant producing bacteria, and containing acid and gas containing bacteria, and polymer producing bacteria, l and l Although the proportion of y6y4 in different bacteria, but mixed bacteria liquid flooding effect is good

46、the main reason is their role, four kinds of bacteria produce a synergistic effect.Effect of 22 concentration of bacterial fluid on recoveryIn order to investigate the bacterial concentration effects on recovery rate, l diluted 1 times and 1 times after the flooding experiment, the y60000 experiment

47、al results are shown in Table 1. The experimental results show that the original bacterium liquid diluted 1 times, 0 recovery rate increases by 57%,.4 diluted 1 times after 000, recovery rate is increased the value is only 29%.6 that of microorganisms in the lower concentration, the effect of oil is

48、 worse. Microorganisms in concentration is too low, the recovery rate is negative, therefore, microbial lfooding in the field, you must ensure that there is enough bacteria liquid, in order to make the construction site to achieve the desired effect.23 the influence of slug size on oil recovery. In

49、crude oil production, slug injection often affects recovery factorEffect of recovery. The experiment designed three slug, respectively is 03,.0610, PVPV and.P were also carried out a V water flooding experiment, the experimental results are shown in table 3.Table lTb3hdpcmneiecidfettapga.Teleetcnyir

50、bcrliasfifnenaefiu recovery 3 different microorganisms under slugModelMicrobial slug / VPWater drive recovery /%Nutrient solutionRecovery /%Microbial recovery rate /%Subsequent water flooding recovery /%N1550347.5 4 2 1 9 4 9 8 5. 121 4. 3 96 5. 7 20 5. 2 39 5. 0 67n 3，1，0. 5，2，01，5. 5，21，5. 5，4，3，5

51、. 2，8324渗透率对采收率的影响。在以前的微生物与油藏适应性方面，只对油层渗透率下限进行了研究，美国和罗马尼亚等国都制定了应用范围，但是渗透率大小对微生物驱油效率的影响没有进行过研究。在本实验研究中，先用填砂模型进行实验，结果发现原油采收率与先前用人造岩心进行的结果差别增刊微生物驱油中采收率影响因素实验研究13 4较大，为此，使用两个菌种，在填砂模型和人造岩心上都进行驱替实验，油水和其它实验条件接近。对比实验的结果，两个菌种在渗透率较低的人造岩心上采收率都比在填砂模型上的高实验结果见表4。表4不同渗透率下的采收率R E T B4 H D P厘米n EIEC我耗尽型场效应晶体管得到A。E L

52、 E ET C N C E纽约即m i t我的FI F n r o f y模型号渗透率1尸。水驱采收率%后续水驱采收率X一，1米0卜N2 M治1。采收率增加%”。1菌液我一Y 64 3 4岩心）4一一（4 3 8岩心）4一一（件”五点九一三七6 1 2. 3旧零七十四零论7（X飞5. 6 63 5. 7 35丫卜6 3 6. 6一。0 36B一Y 21一B一Y 2 Y 62填砂）（3填砂）（5. 3 89 6. 7 35L（5 5 7. 1六十点六渗透率太高时，微生物驱油不能取得好的效果，其原因是渗透率太高，孔隙喉道尺寸太大，Large pore water breakthrough alon

53、g the microbial migration has been less resistance, and not oil full role, in this kind of reservoir, if the use of larger species, the effect may be better. A lot of experimental data in the literature are obtained in the sand model, pore structure, pore filling sand model the connectivity between

54、the sand grains and the natural core and artificial core vary greatly, fill in the experimental data obtained on the sand model can not reflect the objective and effective conditions of microbial in reservoir pore. Therefore, the simulation experiment of microbial oil displacement, the use of natura

55、l or artificial core and core permeability reservoir close to as far as possible, in order to objectively reflect the effect of strain, make a correct evaluation of strain.3 knotstheory(I) strains have great influence on the microbial oil displacement effect, to produce polymer and compound bacteria

56、 (I). To compare the effect of bacterial concentration and slug size have effect on oil displacement, on the whole, the concentration of bacteria is bigger, bigger plug, oil displacement effect better. (microbial flooding is not the bigger the better permeability, permeability of Q I) is too high, t

57、he oil displacement effect is relatively poor, the reason may be microorganisms from large pore migration, and the crude oil of low effect.(the laboratory simulation experiment of oil displacement, W) proposed the possible use of artificial core permeability and reservoir core or close to the natural core,