台南气田产水气井堵水技术研究  

Research on water plugging technology for water-producing gaswells in Tainan gas field

作　　者：欧宝明 程长坤 杜竞 黄天鹏 倪勇 康瑞鑫 章志轩 李方明 OU Baoming;CHENG Changkun;DU Jing;HUANG Tianpeng;NI Yong;KANG Ruixin;ZHANG Zhixuan;LI Fangming(Drilling&Production Technology Research Institute of Qinghai Oilfield,Dunhuang,Gansu,736202,China;Borehole Operation Company of Qinghai Oilfield,Dunhuang,Gansu,736202,China;PetroChina Qinghai Oil&Gasfield Development Office,Dunhuang,Gansu,736202,China)

机构地区：[1]中国石油青海油田钻采工艺研究院,甘肃敦煌736202 [2]中国石油青海油田井下作业公司,甘肃敦煌736202 [3]中国石油青海油田气田开发处,甘肃敦煌736202

出　　处：《天然气与石油》2021年第4期65-70,共6页Natural Gas and Oil

基　　金：中国石油天然气股份有限公司科技重大专项“柴达木盆地老气区控水稳气及新气区高效开发技术研究”(2016E-0106GF)。

摘　　要：针对台南气田疏松砂岩气藏高含水开发阶段“排水采气”工艺措施效果不理想和产出水处理困难等问题,在对气藏非均质性及边水沿高渗条带突进认识的基础上,结合水平井完井筛管易变形等复杂井况,基于储层物性差异,提出了选择性化学堵剂笼统堵水的工艺对策,研发了适合高矿化度地层水条件下成胶强度高的堵剂配方。岩心驱替实验表明,水相岩心封堵率大于90%、气相岩心封堵率小于20%,堵剂具有较好的注入性及选择性。经TH3-1井现场试验验证降水率80%,达到预期效果,对有水气藏的开发具有重要借鉴意义。This paper is presented to address the issue of undesired effects of“drainage gas recovery”technological measures in the high water-cut development stage of the loose sandstone gas field in Tainan and difficulties in the treatment of produced water.On the basis of the understanding of the heterogeneity of gas reservoirs and the breakthrough of high-permeability belts along the edge water,combined with complicated well conditions such as easy deformation of horizontal well completion screens,the technological countermeasures for water plugging with selective chemical plugging agents are proposed in accordance with the difference of reservoir physical properties.And a plugging agent formula suitable for high-salinity formation water with high gel strength was developed.The core displacement experiments show that the plugging rate of water-phase core is greater than 90%,and that of gas-phase core is less than 20%.The plugging agent enjoys good injectivity and selectivity.The field test of TH3-1 well verified that the precipitation rate reached 80%,achieving the expected effect.

关 键 词：产水气井 堵水技术 筛管完井 化学堵剂 水平井 台南气田 

分 类 号：TE375[石油与天然气工程—油气田开发工程]