中国石化提高采收率技术研究进展与应用

Research progress and application of EOR techniques in SINOPEC

从化学驱油技术、稠油热采技术、注气驱油技术和微生物驱油技术4个方面,对中国石化提高采收率技术的研究进展及应用进行了概述,归纳了各项技术的适用条件、应用结果及存在问题,并讨论了中国石化提高采收率技术规模化应用的方向。研究结果指出:化学驱油技术已成为中国石化提高采收率技术的主体,其中的聚合物驱和二元复合驱已成熟配套,并实现规模化应用。非均相复合驱技术在孤岛中一区聚合物驱后油藏试验成功,预计可提高采收率7.3%。在稠油热采技术中,热化学吞吐、井网加密和普通稠油水驱转热采技术已推广应用,蒸汽驱和热化学蒸汽驱技术仍处于工业化试验阶段。注气驱油技术和微生物采油技术处于现场试验阶段,且均已取得较好的增产效果。中国石化提高采收率技术工业化应用的方向是继续研究适应复杂油藏条件的驱油剂、驱油体系和流度控制技术,并对成熟技术进行组合应用。

This paper introduced the research progress and application of the EOR techniques such as chemical flooding, heavy oil thermal recovery,gas flooding and microbial flooding,summarized the application conditions,application results and existing problems for various techniques, and disscussed the direction of the large-scale application of EOR tech-niques for SINOPEC.The results show that chemical flooding has become the predominant EOR technology EOR projects of SINOPEC are under.Polymer and SP flooding techniques are mature and complete in supporting technologies,and have been put into industrial application technologies in China,with well developed relating techniques,and in the phase of in-dustrialization.Heterogeneous Post-polymer flooding test of non-homogeneous composite flooding technique has been test successfully carried out in the 1st Block of central Gudao,Shengli oilfield,and after polymer flooding which can be expec-ted to enhanced oil recovery of 7.3%is expected.Among heavy oil thermal recovery techniques,thermochemical puff ＆amp;huff,well pattern infilling and thermal recovery of conventional heavy oil techniques are in the process of generalization and application have had large scale field applications,while steam injection and thermochemical steam injection tech-niques are still under research.SINOPEC is currently carrying out pilots for gas flooding and microbial flooding which can be expected to with the expectation of enhanced oil recovery increase.The focuses of SINOPEC’ s industrial application of EOR techniques in the future are displacing agent or displacing system capable of being adapted to harsh reservoir condi-tions,mobility control technique and combined application of mature technologies.