CAJ | 학술논문

大庆油田原油酸值低,影响三元复合驱的应用效果,为了进一步提高原油采收率,提出微生物与三元复合驱结合的开发思路.进行了菌种作用后原油性质的变化、作用后原油对三元体系界面张力的影响、菌液注入拌气比例及微观模型驱油和物理模拟驱油实验等研究,结果表明,微生物作用后原油性质得到改善,流动性变好,作用后原油酸值较未作用原油提高20倍以上,与三元体系界面张力进一步降低.室内物理模拟驱油实验表明,先注入0.05 PV菌液,再用三元体系驱替,比单独化学驱油采收率增加8.66%.应用微生物技术与三元复合驱结合的方法,可以进一步提高采收率,降低三元复合驱成本,为低酸值油藏提供一种经济有效的开采方法.
대경유전원유산치저,영향삼원복합구적응용효과,위료진일보제고원유채수솔,제출미생물여삼원복합구결합적개발사로.진행료균충작용후원유성질적변화、작용후원유대삼원체계계면장력적영향、균액주입반기비례급미관모형구유화물리모의구유실험등연구,결과표명,미생물작용후원유성질득도개선,류동성변호,작용후원유산치교미작용원유제고20배이상,여삼원체계계면장력진일보강저.실내물리모의구유실험표명,선주입0.05 PV균액,재용삼원체계구체,비단독화학구유채수솔증가8.66%.응용미생물기술여삼원복합구결합적방법,가이진일보제고채수솔,강저삼원복합구성본,위저산치유장제공일충경제유효적개채방법.
The application of alkane/surfactant/polymer (ASP) flooding is not satisfying, because of the low acid value of crude oil in the oilfield. To further enhance oil recovery, the method combining microbe with ASP flooding is presented. Study is conducted on the change of crude oil quality after microbes take effect, the effect of crude oil on the interfacial tension of the ASP system, the scale of microbe injection with air, the microcosmic flooding model and physical simulation flooding experiments. Results show that the quality and flowability are improved after microbes take effect. The acid value of crude oil is increased by 20 times higher than before, and the interfacial tension with the ASP system drops further. Indoor physical simulation oil displacement experiment shows that the oil recovery may be enhanced by 8.66% by injecting 0.05PV functional microbe firstly and then using ASP formulation (main flooding agent is made in Daqing) to displace oil, compared to the method of using ASP flooding only. So the approach of using functional microbe to displace oil combined with ASP flooding may further enhance oil recovery, reduce ASP flooding costs, offering an economic and effective method for exploitation of reservoirs with low acid value.