摘要
克拉美丽气田滴西18火山岩气藏储层非均质性强、气水关系复杂、气井产水量大,严重影响气藏的开发效果。气藏产水特征研究是气藏治水、排水采气提高采收率的基础。通过对气井产出水水性分析、地层水产出规律、水侵类型及水侵特征规律的综合研究表明:滴西18火山岩气藏部分气井Cl-浓度及矿化度已大幅超出该气藏地层水均值;产出地层水的DX1804、DX1805、DXHW181、DXHW182井为底水侵入。侵入模式:DX1804和DX1805井为纵窜横侵型;DXHW181和DXHW182井为水锥型;水侵特征,DX1804井生产水气比上升型态属裂缝水侵型;DX1805、DXHW181和DXHW182井生产水气比上升型态属舌进弱水侵。
Volcanic gas reservoirs are characterized by rapid variation of lithology,poor connection,and unstable distribution.Therefore,their water-producing features are more complicated and variable than those of conventional gas reservoirs.Taking volcanic gas reservoirs in Dixi 18 well block in Karamaili gasfield as examples,we analyzed the water-producing features and way,and water-invasion channel.The studied achievements provide a realistic guiding significance for developing these reservoirs with water production.
出处
《天然气勘探与开发》
2013年第2期48-52,87,共5页
Natural Gas Exploration and Development
关键词
火山岩气藏
产水气井
水侵动态
水侵路径
volcanic gas reservoir,water-producing gas well,water-invasion performance,water-invasion channel
