石油钻采工艺2017，Vol.39Issue(5)：611-616,6.DOI:10.13639/j.odpt.2017.05.015
别古庄油田京11断块油藏三元复合体系配方优化
Optimization of alkaline- surfactant- polymer flooding system of Jing 11 block in Bieguzhuang oil field
摘要
Abstract
Jing 11 block in Bieguzhuang oil field has the characteristics such as high clay content(29%) , low crude oil viscosity(11 mPa·s) , low acid value(0. 28 mgKOH/g crude oil), low reservoir temperature( 54 ℃), high water flooding recovery(>50%). An alka-line- surfactant- polymer flooding system which contains 12 000 mg/L of sodium carbonate, 3 000 mg/L of ES surfactant and1500mg/L of J4 polymer was optimized base on those characteristics. The thermal stability, low inter-facial tension as well as anti-adsorption abil-ity of the system were explicitly investigated. The results showed that the system exhibited good thermal stability (viscosity retention rate was 50. 6 %) and the interfacial tension was still in ultra low levels after 90 days of ageing and three times of adsorption on the oil sands. The flooding experiments of the unaged and aged alkaline/surfactant/polymer system (ASP) were performed on heterogeneous double-tube sand pack models respectively. The experimental data showed that with a 90-percent cut in water, 31. 1% additional oil was produced by injecting 0. 3 pore volume of the unaged flooding system. Under the same operational condition, 22. 2 % additional oil was recovered when the aged system was injected. The 8. 9% fall in the oil recovery indicated that the ageing affected the results of the oil recovery. It was found that a decrease in the viscosity and an increase in the inter-facial tension of the ASP system were the causes of the reduction in oil recovery, which could play a guiding role in optimizing the flooding system. That is to say, both the viscosity and the inter-facial tension of the unaged flooding system and that of the aged system have to be measured. The optimum ASP system could be screened based on the higher visicosity retention and lower inter-facial tension after ageing.关键词
别古庄油田/京11断块油藏/三元复合体系/配方优化/热稳定性/界面张力/吸附/老化/驱油效率Key words
Bieguzhuang oilfield/Jing 11 block/asp system/formulation optimization/thermal stability/inter-facial tension/ad-sorption/ageing/oil recovery分类
能源科技引用本文复制引用
唐先荣,任红梅,张宏,祖莉华,柏洁,王洪涛..别古庄油田京11断块油藏三元复合体系配方优化[J].石油钻采工艺,2017,39(5):611-616,6.基金项目
中国石油天然气股份有限公司重大科技专项"华北油田持续有效稳产勘探开发关键技术研究与应用"(编号2017E-15). （编号2017E-15）
