沙湾凹陷上乌尔禾组储层成岩作用及成岩相分析  

Diagenesis and Diagenetic Facies of Upper Wuerhe Formation in the Shawan Sag

作　　者：于景维 罗刚 李斌 潘拓 余海涛 况昊[4] 褚旭 张晓童 YU Jingwei;LUO Gang;LI Bin;PAN Tuo;YU Haitao;KUANG Hao;CHU Xu;ZHANG Xiaotong(China University of Petroleum(Beijing)at Karamay,Karamay,Xinjiang 834000,China;Exploration Dirision of Xinjiang 0ifield Company,Karamay,Xinjiang 834000,China;Research Institude of Exploration and Derelopment,Xinjiang Oilfield Company,Urnunqi,Xinjiang 830014,China;Chongqing Unirersity of Science and Technology,Chongqing 401331,China)

机构地区：[1]中国石油大学(北京)克拉玛依校区,新疆克拉玛依834000 [2]新疆油田分公司勘探事业部,新疆克拉玛依834000 [3]新疆油田分公司勘探开发研究院,新疆乌鲁木齐830014 [4]重庆科技学院,重庆401331

出　　处：《现代地质》2022年第4期1095-1104,共10页Geoscience

基　　金：新疆维吾尔自治区自然科学面上基金项目(2021D01A201);重庆市自然科学基金面上项目(cstc2019jcyj-msxmX0008)

摘　　要：二叠系上乌尔禾组为沙湾凹陷重要勘探目的层之一,主要发育岩性油气藏,但成岩作用的相关研究较少,阻碍该区上乌尔禾组深入勘探。在储层岩石学以及储集特征分析基础上,利用薄片观察、物性分析、扫描电镜以及能谱等实验手段,对上乌尔禾组成岩作用类型以及成岩相进行详细研究。发现研究区上乌尔禾组储层成岩作用包括压实作用、胶结作用以及溶蚀作用。结合大量成岩现象及特征,认为研究区上乌尔禾组成岩阶段为中成岩B期。综合成岩强度以及典型成岩现象,将研究区上乌尔禾组成岩相划分为强压实致密相、强压实中溶蚀相、中强压实方解石胶结弱溶蚀相、中强压实伊蒙混层包膜弱溶蚀相、中强压实沸石胶结弱溶蚀相,利用Fisher判别法建立各成岩相判别公式,并结合测井资料探索各成岩相的分布规律,为优质储层的预测提供依据。The Permian Upper Wuerhe Formation is a key exploration target zone in the Shawan Sag,which is a typical lithologic reservoir.Fewer studies were dedicated to the diagenesis of Upper Wuerhe Formation,which hinders deeper exploration.The data of slice,physical property,SEM and electromagnetic spectrum,combined with lithologic analysis and reservoir reserve characters,were applied to analyze the diagenetic types and facies.The results show that the diagenetic types comprise compaction,cementation and resolution.According to the diagenetic phenomena and characters,we concluded that the diagenetic evolution of Upper W uerhe Formation has already been in the middle diagenetic stage B.Based on the intensity and typical phenomenon diagenesis,the diagenetic facies could be divided into five types,including the strong compaction tight,strong compaction-medium resolution medium-strong compaction-calcite cementation-weak resolution,medium-strong compactionmixed-layer illite cementation-weak resolution,and the medium-strong compaction-zeolite cementation-weak resolution digenetic facies Combined with the Fisher typical discriminant,the diagenetic facies were built on discriminant functions to analyze the diagenetic facies distribution patterns,which would provide a foundation for deeper exploration.

关 键 词：成岩作用 成岩相 储层 上乌尔禾组 沙湾凹陷 

分 类 号：TE122[石油与天然气工程—油气勘探]