微生物表面活性提高采收率增效技术的适应性研究
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1.天津大港油田滨港集团博弘石油化工研发中心;2.天津大港油田滨港集团生产技术部

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TE357;TQ423

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中国石油科技创新基金“特低渗油藏智能片状纳米材料调驱作用机理研究”(项目编号 2021DQ02-0202)


Adaptivity of microbial surface activity
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    摘要:

    针对大港油田开展三次采油化学驱存在成本高、药剂不环保、提高采收率效果不理想的问题,发明出一种环保可降解的微生物表面活性增效剂,以该产品为核心,分别与石油磺酸盐及聚合物搭配,形成性能更优的表面活性剂驱、聚表二元驱、聚表碱三元驱等系列增效体系。室内开展表面活性剂增效驱油体系的表面张力、界面张力、抗盐能力、抗镁能力、生物降解性、耐温性、抗吸附性等性能评价,均比单一石油磺酸盐体系有明显提高,表面张力可降低至18mN/m,界面张力稀释8倍后仍可达10-3mN/m,抗盐达75g/L,抗镁达2000mg/L,耐温达90℃,45天生物降解率达90%以上,抗吸附可达四级。用大港油田港东二区原油和地层采出水为评价介质,开展增效体系与油藏适应性评价,分别评价了二元体系和三元体系的界面张力和抗吸附性能,比单一石油磺酸盐体系降低一个数量级;评价了黏度稳定性,黏度保留率7天可达65%以上,比单一石油磺酸盐体系提高7%以上;评价了三种体系的驱油性能,提高采收率均超过17%,比单一石油磺酸盐体系提高1.4%以上。对大港油田中孔中渗、低孔低渗等6种不同油藏条件进行适应性评价,表面活性剂增效驱油体系的界面张力均能达到10-3mN/m以上超低数量级,增效技术对大港油田油藏条件具有较好的适应性。在大港油田羊二庄羊5-XX井开展1井次二元增效体系驱油试验,起到较好增油和控水效果。

    Abstract:

    In view of the problems of high cost, unenvironmental protection of chemicals in pharmaceuticals, and unsatisfactory effect of improving oil recovery in Dagang oilfield,developed an environmentally degradable microbial surface activity synergist,with this product as the core,Combined with a petroleum sulfonate and a polymer, respectively,the formation of better surfactant flooding, polysurface binary drive, polysurface alkali ternary drive and other series of efficiency system.The performance evaluation of the surface tension, interface tension, salt resistance, magnesium resistance, biodegradability, temperature resistance, and adsorption resistance of the surfactant efficiency and oil displacement system is carried out indoors,both are significantly higher than the single petroleum sulfonate system,the surface tension can be reduced to 18 m N/m,interfacial tension was diluted by 8 times and still reached up to 10-3 m N/m,salt resistance to up to 75g / L,against magnesium for up to 2,000 mg/L,temperature resistant up to 90℃,the biodegradation rate of 45 days was more than 90%,anti-adsorption up to four levels。The crude oil and water from the strata of Dagang Oilfield were used as the evaluation medium,carry out efficiency increase system and reservoir adaptability evaluation,the interfacial tension and anti-adsorption properties of the binary and ternary systems were evaluated separately,an order of magnitude lower than a single petroleum sulfonate system;Viscosity stability was evaluated,the viscosity retention rate can reach more than 65% in 7 days,more than 7% higher than the single petroleum sulfonate system;The flooding performance of the three systems was evaluated,EOR all exceeded 17%,it is more than 1.4% higher than the single petroleum sulfonate system.The adaptability of six different reservoir conditions such as medium permeability and low permeability in Dagang oilfield was evaluated,the interface tension of the surfactant efficiency oil displacement system can reach the ultra-low order of magnitude above 10-3 m N/m,the efficiency increase technology has a good adaptability to the reservoir conditions in Dagang oilfield.Oil flooding test of well 1 in Yangerzhuang Well 5-XX, Dagang Oilfield,play a better oil increase and water control effect.

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  • 收稿日期: 2024-08-07
  • 最后修改日期: 2025-01-11
  • 录用日期: 2025-01-23
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