玛湖1井区上二叠统乌尔禾组一段成岩特征  

Diagenetic characteristics of the first member of the upper Permian UrhoFormation in Mahu1 well block

作　　者：于景锋[1] 李平[1] 陈乃志 孟鑫[1] 罗帅 何乃祥 YU Jingfeng;LI Ping;CHEN Naizhi;MENG Xin;LUO Shuai;HE Naixiang(Development Company of Xinjiang Oilfield Company,PetroChina,Karamay 834000,Xinjiang,China;Geological Research Institute of West Drilling Engineering Co.,Ltd.,PetroChina,Karamay 834000,Xinjiang,China;Beijing Yaoqi Technology Co.,Ltd.,Beijing 102206,China)

机构地区：[1]中国石油新疆油田公司开发公司,新疆克拉玛依834000 [2]中国石油西部钻探工程有限公司地质研究院,新疆克拉玛依834000 [3]北京耀齐科技有限公司,北京102206

出　　处：《石油地质与工程》2023年第6期36-41,共6页Petroleum Geology and Engineering

基　　金：国家科技重大专项“准噶尔盆地致密油开发示范工程”(2017ZX05070-002)。

摘　　要：近年来,玛湖凹陷油气勘探不断取得突破,但对砂砾岩储层非均质性成岩控制研究相对较少。玛湖1井区上二叠统乌尔禾组一段为典型的强非均质性砂砾岩储层,储层成分成熟度和结构成熟度较低。以铸体薄片、储层物性和扫描电镜等资料为基础,通过分析成岩作用对储层物性破坏和建设作用,明确了研究区储层凝灰岩碎屑和长石溶蚀是次生溶孔含量高的主要原因;沸石在成岩早期对储层具有很强的胶结破坏作用,但进入中成岩A期后,沸石溶孔大量形成,成为次生溶孔的重要组成部分;同时乌尔禾组一段储层存在大量铁方解石和丝状伊利石,表明玛湖1井区乌尔禾组一段现今处于中成岩B期。In recent years,breakthroughs have been made in oil and gas exploration in the Mahu Sag,but there is less research on the control of heterogeneous diagenesis in sandy gravel reservoirs.The first member of the Upper Permian Urho Formation in the Mahu1 well block is a typical strongly heterogeneous sandstone reservoir with low compositional and structural maturity.Based on data such as cast thin sections,reservoir physical properties,and scanning electron microscopy,the damage and construction effects of diagenesis on reservoir physical properties were analyzed,and the main reason for the high content of secondary dissolved pores is clarified,which is the dissolution of tuff debris and feldspar in the study area.Zeolites have a strong cementation and destruction effect on reservoirs in the early stage of diagenesis,but after entering the middle diagenetic stage A,a large number of zeolite dissolution pores are formed,becoming an important component of secondary dissolution pores.Meanwhile,there is a large amount of iron calcite and filamentous illite in the reservoir of the first member of the Urho Formation,indicating that the first member of the Urhe Formation in the Mahu1 well block is currently in the middle diagenetic stage B.

关 键 词：玛湖1井区 乌尔禾组 成岩特征 成岩序列 

分 类 号：TE112.23[石油与天然气工程—油气勘探]