鄂尔多斯盆地苏75区块山西组储层特征与发育主控因素  

Reservoir Characteristics and Main Controlling Factors of Shanxi Formation in Block Su 75, Ordos Basin

作　　者：李忠秋 乔泽旭 

机构地区：[1]重庆科技大学石油与天然气工程学院,重庆

出　　处：《地球科学前沿（汉斯）》2024年第10期1267-1278,共12页Advances in Geosciences

摘　　要：二叠系山西组作为苏75区块致密砂岩气主力勘探开发层位之一,现目前认识到该层位气藏厚度较大、领井产量高且有利区域已动用,为此亟需深化储层地质研究,为区域持续稳产奠定基础。利用目的层段取井岩心、铸体薄片、物性测试、地层埋藏史特征等资料分析了目的层段储层特征与储层发育主控因素。研究结果表明:研究区储层岩性主要为长石石英砂岩,少量岩屑石英砂岩。储层储集空间发育有原生孔隙、次生孔隙、微裂缝等,但主要以次生孔隙为主,占比达到总孔隙类型的90.58%,原生孔隙与微裂缝占比不足10%,总体上来说属于低孔低渗孔隙性储层。沉积作用、成岩作用、构造作用是研究区优质储层形成的主要控制因素,目的层段主要发育辫状河三角洲沉积相,持续深切的水流与侧向连续性较好的沉积相是储层发育的先决条件;成岩作用先发生胶结作用与压实作用使储层致密,然后发生溶蚀作用形成大量孔隙,是储层发育的核心条件;构造作用造成地层抬升沉降形成断裂,为地下流体与岩石颗粒发生溶蚀作用提供了场所,也为溶蚀流体的流动提供了有利通道,是储层发育的关键条件。The Shanxi Formation of the Permian System is one of the main exploration and development layers for tight sandstone gas in Su 75 block. Currently, it is recognized that the reservoir thickness is large, the well productivity is high, and the favorable areas have been developed. Therefore, it is urgently needed to deepen the reservoir geological research to lay a foundation for the continuous stable production of the area. Using the data of well core, thin section, petrophysical test, and geological burial history characteristics of the target layer, the reservoir characteristics and the main controlling factors of the reservoir development were analyzed. The research results show that the reservoir lithology in the study area is mainly quartzose sa

关 键 词：鄂尔多斯盆地 苏75区块 山西组 储层特征 主控因素 

分 类 号：P61[天文地球—矿床学]