| 低渗透气藏低压低产气井解水锁技术研究及应用 |
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| 引用本文： | 姚广聚,彭红利,雷炜,陈海龙. 低渗透气藏低压低产气井解水锁技术研究及应用[J]. 油气地质与采收率, 2011, 18(5) |
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| 作者姓名： | 姚广聚 彭红利 雷炜 陈海龙 |
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| 作者单位： | 中国石化股份西南油气分公司工程技术研究院,四川德阳,618000 |
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| 基金项目： | 国家重大专项“大型油气田及煤层气开发”下属专题“四川盆地低渗气藏储层改造工艺技术研究”(2008ZX05002-004-004) |
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| 摘 要： | 川西中浅层低渗透致密砂岩气藏储层物性差,含水饱和度高,气井产能较低,普遍存在水锁伤害,严重影响了采气中后期气井的正常生产.以室内实验为手段,研究了水锁伤害程度,定量分析了解水锁剂对天然气渗流的改善作用.研究结果表明,低渗透致密砂岩气井采气中后期近井储层积液会引起严重的水锁伤害,影响了天然气在储层中的渗流能力,解水锁剂可降低近井储层的含水饱和度,改善岩心渗透率,降低储层中天然气启动压差.解水锁剂HY在A井现场试验后,该井在油压和套压变化不大的情况下,5个月累积增产气量为24×104 m3,单井增加经济效益为19×104元.
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| 关 键 词： | 低渗透气藏 启动压差 低压低产气井 水锁伤害 解水锁 |
Study on unlocking technology of water-lock in the well of low permeability gas reservoir in the mature production stage |
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| Yao Guangju,Peng Hongli,Lei Wei et al. Engineering , Technology Research Institute,Southwest Oil , Gas Branch,SINOPEC,Deyang City,Sichuan Province,,China. Study on unlocking technology of water-lock in the well of low permeability gas reservoir in the mature production stage[J]. Petroleum Geology and Recovery Efficiency, 2011, 18(5) |
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| Authors: | Yao Guangju Peng Hongli Lei Wei et al. Engineering Technology Research Institute Southwest Oil Gas Branch SINOPEC Deyang City Sichuan Province China |
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| Affiliation: | Yao Guangju,Peng Hongli,Lei Wei et al. Engineering and Technology Research Institute,Southwest Oil and Gas Branch,SINOPEC,Deyang City,Sichuan Province,618000,China |
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| Abstract: | There is serious damage of water block in the low permeability gas reservoir in west Sichuan,and it will cause fluctuation of the normal production.This paper studies the rock near the wellbore in terms of wettability and liquid interfacial tension between the two phases,as well as the performance of water unlocking agents on the natural gas percolation.The results show that the accumulated liquid in the near wellbore zone may cause serious damage on the flow of natural gas capacity because of water lock.Th... |
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| Keywords: | low-permeability gas field start up pressure differential low pressure and productivity gas well water lock damage water unlocking |
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