超稠油油藏HDCS开采技术优化

发布时间：2018-05-18 07:51

本文选题：超稠油 + HDCS　；参考：《断块油气田》2017年03期

【摘要】：针对胜利油田广9区块超稠油油藏HDCS开采过程中存在的问题,通过油藏数值模拟分析了HDCS的降黏作用机理,优化了HDCS吞吐各周期降黏剂、CO_2与蒸汽的注入量,提出HDCS吞吐后期开采方式应转为HNS吞吐。研究结果证实:降黏剂、CO_2与蒸汽先后注入地层具有滚动接替、协同降黏作用,降黏剂的作用范围主要集中在近井地带0~2.4 m,CO_2的受效半径大于降黏剂,约为6.4 m,蒸汽的作用范围最大,受效半径约为11.2 m。从经济角度出发,HDCS吞吐4周期时,应停止注入降黏剂,转入HCS开发;吞吐7周期时,停止注入CO_2,转入蒸汽吞吐开发。HDCS吞吐8周期后,近井地带温度逐渐升高,原油黏度大幅度降低,地层能量逐渐衰竭,产油量下降较快。通过优化得出,HDCS吞吐8周期后转HNS吞吐4周期的总产油量最高。
[Abstract]:In view of the problems existing in the HDCS mining process of super heavy oil reservoir in Guang 9 block of Shengli Oilfield, the mechanism of viscosity reduction of HDCS is analyzed through reservoir numerical simulation, and the various period viscosity reducing agents of HDCS huff and puff, CO_2 and steam injection are optimized, and the later mining mode of HDCS huff and puff should be converted to HNS huff and puff. The results confirm that the viscosity reducing agent, CO_2 and steam first are first. The post injection formation has a rolling succession and synergistic effect. The action range of the viscosity reducing agent is mainly concentrated in the near well zone 0~2.4 m. The effect radius of CO_2 is greater than the viscosity reducing agent, about 6.4 m, the steam has the largest scope of action, and the effect radius is about 11.2 M. from the economic angle. When HDCS swallows the 4 cycle, the viscosity reducer should be stopped into HCS and swallowed. When 7 cycles are spit for 7 periods, the temperature in the near well zone increases gradually, the viscosity of the crude oil decreases greatly, the energy of the formation gradually decreases and the oil production decreases rapidly. The total oil production of the HNS spitting for 4 cycles after the 8 cycle of HDCS huff and puff is the highest.
【作者单位】：中国石化胜利油田分公司现河采油厂;
【基金】：国家自然科学基金青年科学基金项目“致密油储层纳米流体渗吸驱油机制研究”(51604292)
【分类号】：TE345

【相似文献】