超深层稠油HDCS开发技术研究与应用

Research and application on HDCS development technology for super-deep heavy oil

杨艳霞

Yang Yanxia

中国石化胜利油田分公司地质科学研究院，山东 东营 257015

Geological Research Institute, Shengli Oilfield Company, SINOPEC, Dongying 257015, China

胜利油田埕东断裂带超深层特稠油油藏采用常规注蒸汽开发时，存在注汽压力高、井筒热损失大、井底干度低的问题，有效储量动用程度较低。室内实验和数模研究表明：伴蒸汽注入油溶性降黏剂可降低超深层稠油注汽压力；二氧化碳和油溶性降黏剂驱可大幅度提高超深层稠油驱替效率；水平井可提高油层吸汽能力、降低注汽压力，开采效果优于直井。因此，由水平井、油溶性降黏剂、二氧化碳和蒸汽组合形成的HDCS强化采油技术，是开发埕东断裂段超深层稠油的有效方式。

The super-deep heavy oil reservoirs of Chengdong fault belts weren’t produced efficiently by conventional steam injection because of the problems such as high steam injection pressure, large wellbore heat loss and low bottom hole steam dryness. Laboratory experiment and numerical analogue show that the injecting oil soluble viscosity reducer with steam can decrease the steam injection pressure of the super-deep heavy oil reservoirs, and carbon dioxide and oil soluble viscosity reducer can enhance substantially the displacement efficiency of super?鄄deep heavy oil reservoirs. Meanwhile, horizontal well can improve the steam absorption ability, and decrease the steam injection pressure. So horizontal well can do better than vertical well. HDCS enhanced oil recovery technology combined with horizontal well, oil soluble viscosity reducer, carbon dioxide and steam is an efficient technique of the development of super?鄄deep heavy oil in Chengdong fault belt.

10.6056/dkyqt2012z1017