低渗透油藏周期注CO_2驱油室内实验
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摘要
针对靖边油田乔家洼区块203井区的特点,开展室内CO2驱油实验研究,对周期注气的驱油潜力进行评价,并对注气段塞尺寸和注气速度进行优化。实验结果表明:周期注CO2在目标井区具有较大的驱油潜力,可在连续气驱的基础上将采收率提高15.29百分点,并且比连续注气多注入0.8 PV时才发生气窜,延缓气窜效果明显;经优化的最佳注气段塞尺寸和最佳注气速度分别为0.05 PV和1.2 m L/min。研究成果为目标区块开展CO2注气试验提供理论支持和技术参考。
Aiming at 203 well area of Qiaojiawa Block,Jingbian Oilfield,CO2 flooding indoor experiments were carried out to evaluate its potential and the injected slug size,and injected velocity wass optimized.The results shows that: the potential of cycle CO2 injection is great in the target well area; oil recovery can be improved about 15.29%,and the CO2 channeling time is late about0.8 PV compared with continuous gas CO2flooding; the best injected slug size and velocity are 0.05 PV and 1.2 ml/min.This results provide theory support and technology reference for CO2 flooding in the target blocks.
Aiming at 203 well area of Qiaojiawa Block,Jingbian Oilfield,CO2 flooding indoor experiments were carried out to evaluate its potential and the injected slug size,and injected velocity wass optimized.The results shows that: the potential of cycle CO2 injection is great in the target well area; oil recovery can be improved about 15.29%,and the CO2 channeling time is late about0.8 PV compared with continuous gas CO2flooding; the best injected slug size and velocity are 0.05 PV and 1.2 ml/min.This results provide theory support and technology reference for CO2 flooding in the target blocks.
引文
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[2]何江川,廖广志,王正茂.油田开发战略与接替技术[J].石油学报,2012,33(3):519-525.
[3]钟张起,史运芳,刘鹏程,等.低渗油藏CO2驱注入时机研究[J].断块油气田,2012,19(3):346-349.
[4]娄毅,杨胜来,章星,等.低渗透油藏二氧化碳混相驱超前注气实验研究:以吉林油田黑79区块为例[J].油气地质与采收率,2012,19(5):78-80.
[5]何应付,周锡生,李敏,等.特低渗透油藏注CO2驱油注入方式研究[J].石油天然气学报,2010,32(6):131-134.
[6]乔红军,任晓娟,闫凤平,等.低渗透储层水气交替注入方式室内试验研究[J].石油天然气学报,2013,35(7):114-117.
[7]章星,杨胜来,李芳芳,等.特低渗透油藏CO2-水交替注入特征和效果[J].大庆石油地质与开发,2013,32(2):122-125.
[8]杨红,余华贵,黄春霞,等.低渗油藏水驱后CO2驱潜力评价及注入参数优化[J].断块油气田,2015,22(2):240-244.
[9]吴忠宝,甘俊奇,曾倩.低渗透油藏二氧化碳混相驱油机理数值模拟[J].油气地质与采收率,2012,19(3):67-70.
[10]杜建芬,陈静,李秋,等.CO2微观驱油实验研究[J].西南石油大学学报,2012,34(6):131-134.
[11]郭平,徐阳,牛保伦,等.胜利油田高89区块低渗油藏CO2近混相驱替机理研究[J].特种油气藏,2012,19(2):104-106.
[12]田树宝,何永宏,冯莎莎,等.低渗油藏气水交替驱不同注入参数优化[J].断块油气田,2012,19(5):612-614.
[13]MALCOLM D,SCOTT M,AKANNI S.New approach to CO2flood:soak slternating gas[R].SPE 70023,2001.
[14]赵永攀,洪玲,江绍静,等.水驱后特低渗透油藏氮气驱驱油特性分析[J].油田化学,2013,30(3):376-379.
[15]王维波,师庆三,余华贵,等.二氧化碳驱油注入方式优选实验[J].断块油气田,2015,22(4):497-500,504.
[16]李士伦,张正卿,冉新权,等.注气提高采收率技[M].成都:四川科学技术出版社,2001:154-155.
[17]范耀,刘易非,李彬刚,等.特低渗透油田不稳定注水提高采收率机理探讨[J].天然气勘探与开发,2009,32(4):47-48,52.