南四区东部二类油层弱碱三元复合驱开发方案优化设计

发布时间：2018-05-18 10:00

本文选题：弱碱三元复合驱 + 二类油层　；参考：《东北石油大学》2017年硕士论文

【摘要】：大庆萨尔图油田南四区东部位于大庆长垣萨尔图油田南部,开发面积为8.90km2,地质储量4839.36×104t。南四区东部行列井网于1965年开始投入开发,采用一套井距为(3-(800,500)×450(500,(250,300)))的行列井网,1984年进行一次加密调整,1996年进行二次加密调整,2001年进行三次加密调整。2004年在南四区东部南4-10排~南4-3排之间开展三类油层聚合物驱试验。本文针对南四区东部萨、葡油层中的二类油层进行弱碱三元复合驱开发方案设计。本文首先对化学驱驱油体系进行优选,结合油田现场试验的开发经验,分析了强碱三元复合驱及弱碱三元复合驱的开发效果,两者提高采收率幅度基本相当,但弱碱三元体系的注入能力及采出能力强于强碱三元体系,同时采出液处理难度低于强碱三元体系。针对南四区东部二类油层发育的特点优选注入弱碱三元复合驱体系。同时对区块开发层系组合、布井方式、注入速度、段塞组合等参数进行了优化。最后,根据注入参数优化设计,进行了二类油层弱碱三元复合驱开发效果预测。累计注入孔隙体积1.304PV时,全区综合含水达到98%,采出程度为67.44%,阶段采出程度20.61%,三元体系提高采收率16.35%。区块阶段累积产油量138.84×104t,三元体系增加可采储量110.14×104t。
[Abstract]:The eastern part of the South fourth area of Daqing Saltu Oilfield is located in the south of Daqing Changyuan Saltu Oilfield with a development area of 8.90 km2 and geological reserves of 4839.36 脳 10 ~ 4 t. In 1965, in the eastern part of the southern fourth district, the row and column well pattern began to be developed. A set of row and row well pattern with a well spacing of 3 ~ (800500) 脳 450 ~ 500 ~ 500 ~ 250300) was adopted. One infilling adjustment was carried out in 1984, second infilling adjustment was carried out in 1996, and three infilling adjustment was carried out in 2001. In 2004, three types of polymer flooding tests were carried out between 4 ~ 10 rows and 4 ~ 3 rows in the east of South fourth District. In this paper, the development scheme of weak alkali ASP flooding is designed for the second class oil reservoir in the east of South fourth area. In this paper, the chemical flooding system is selected at first, and the development effect of strong alkali ternary flooding and weak alkali ternary flooding is analyzed in combination with the development experience of oilfield field tests. However, the injection ability and extraction ability of weak alkali ternary system are stronger than that of strong alkali ternary system, and the difficulty of extraction treatment is lower than that of strong alkali ternary system. According to the characteristics of the development of the second class reservoir in the eastern part of the South fourth area, the weak alkali ASP flooding system is selected and injected. At the same time, the parameters of block development system combination, well layout, injection speed and slug combination are optimized. Finally, according to the optimal design of injection parameters, the development effect of weak alkali ASP flooding in the second class reservoir is predicted. When the cumulative pore volume 1.304PV is injected, the comprehensive water cut of the whole area reaches 98%, the recovery degree is 67.44 and the recovery degree is 20.61 in the stage, and the recovery factor of the ternary system is 16.35. 35%. The cumulative oil production in block stage is 138.84 脳 10 ~ (4) t, and the recoverable reserves are increased by 110.14 脳 10 ~ (4) t with ternary system.
【学位授予单位】：东北石油大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TE357.46

【相似文献】