临兴低阻气藏高不动水饱和度成因及其对气层电阻率的影响  

High Immobile Water Saturation in Linxing Gas Reservoir:Genesis and Impacts on Gas Layer Resistivity

作　　者：刘再振 李洋冰 胡维强 冷捷 蔡瑞豪[2] 谢岚 柳雪青 LIU Zaizhen;LI Yangbing;HU Weiqiang;LENG Jie;CAI Ruihao;XIE Lan;LIU Xueqing(EnerTech-Drilling&Production Co.,CNOOC Energy Technology&Services Limited,Tianjin 300452,China;China United Coalbed Methane Co.,Ltd.,Beijing 100037,China)

机构地区：[1]中海油能源发展股份有限公司工程技术分公司,天津300452 [2]中联煤层气有限责任公司,北京100037

出　　处：《新疆石油地质》2023年第2期217-223,共7页Xinjiang Petroleum Geology

基　　金：中国海洋石油集团有限公司科研条件平台建设项目(CNOOC-KJ-PT-GCJS2021-01)。

摘　　要：临兴气藏盒4段气层为具有工业产能的低阻气层,低阻气层的成因多样,气、水关系复杂,识别难度大。利用铸体薄片、扫描电镜、X射线衍射、核磁共振等技术手段,结合低阻气层测井响应特征,从微观和宏观2方面入手,探讨盒4段低阻气层高不动水饱和度成因及其对气层电阻率的影响。结果表明,赋存在绿泥石薄膜内部的微孔水为盒4段低阻气层高不动水饱和度的主要来源,绿泥石薄膜内部连通性强、含量高的不动水可使气层电阻率大幅下降。The gas layers in the He 4 member in the Linxing gas reservoir are low⁃resistivity gas layers with industrial productivity.These gas layers of diverse genesis exhibit complex gas⁃water relationship,making them difficult to be identified.By means of cast thin section,scanning electron microscopy(SEM),X⁃ray diffraction(XRD)and nuclear magnetic resonance(NMR),and combined with the logging re⁃sponse characteristics of low⁃resistivity gas layers,the high immobile water saturation in the low⁃resistivity gas layers in the He 4 member was analyzed for its genesis and impacts on gas layer resistivity from microscopic and macroscopic perspectives.The analysis results show that the microporous water within chlorite film is the main source of the high⁃saturation immobile water in the low⁃resistivity gas layers in the He 4 member.It is found that the high content of highly connected immobile water within the chlorite film can greatly reduce the resis⁃tivity of the gas layers.

关 键 词：临兴气藏 低阻气层 不动水饱和度 气层电阻率 绿泥石薄膜 微孔水 数字岩心 连通性 

分 类 号：TE122[石油与天然气工程—油气勘探]