水驱废弃油藏CO_2驱提高采收率技术研究  

Study on EOR of injection CO_2 for waterflooding abandoned reservoir

作　　者：国殿斌[1] 房倩[1] 聂法健[1] 

机构地区：[1]中国石化中原油田分公司勘探开发科学研究院,河南濮阳457001

出　　处：《断块油气田》2012年第2期187-190,共4页Fault-Block Oil & Gas Field

摘　　要：中原油田经过30多年高速水驱开发,已进入总体递减阶段,但油藏高温、高地层水矿化度特点限制了化学驱的应用。为改善特高含水开发后期油藏开发效果,中原油田在濮城油田沙一下水驱废弃油藏开辟了先导试验区。以CO2驱提高水驱废弃油藏采收率为目的,研究形成的特高含水期油藏剩余油微差异刻画技术、CO2驱驱油机理认识、注采参数优化方法,以及配套防腐、防窜工艺技术,已应用于2个试验井组,采出程度提高了6.5%。预计濮城沙一下整体实施后,原油采收率提高9.9%,年增产原油超过2×104t,为探索水驱废弃油藏及特高含水油藏提高采收率提供了一项新技术。After high-speed waterflooding development for more than three decades, Zhongyuan Oilfield has entered into a general descending stage, and the application of chemical drive is limited by high temperature and high formation water salinity in resexvoir. In order to improve the development of high water cut reservoir at later development stage, Zhongyuan Oilfield opened up a pilot testarea in the waterflooding abandoned reservoir in the lower part of the first member of Shahejie Formation, Pueheng Oilfieht. This paper studied the micro-differences description of remaining oil, mechanism of CO： displacement, optimization method of injection- production parameter and matched anticmTosion and antichanneling technology at high water cut stage for the purpose of enhancing oil recoverT of abandoned reservoir by using CO2 displacement. The technologies mentioned above had been implemented in two testwell groups, and the degree of reserves recovery increased by 6.5%. The whole project is expeeted to enhance the oil recovery of 9.9% on the basis of waterflouding abandoned reservoir, and annual increase of crude oil production will reach more than 20,000 tons, whieh can provide a new technology for enhanced oil recovery in high water cut reservoir and waterfluoding abandoned reservoir.

关 键 词：CO2气水交替驱 水驱废弃油藏 提高采收率 CO2泡沫 防腐 

分 类 号：TE357.7[石油与天然气工程—油气田开发工程]