元坝气藏须家河组三段储层特征与主控因素  

Reservoir Characteristics and Main Controlling Factor of the Third Member of Xujiahe Formation in Yuanba Gas Reservoir

作　　者：王浩[1,2] 周文[2] 张冲[2] 

机构地区：[1]中国石油川庆钻探工程有限公司地质勘探开发研究院,四川成都610051 [2]"油气藏地质及开发工程"国家重点实验室.成都理工大学,四川成都610059

出　　处：《西南石油大学学报（自然科学版）》2016年第4期19-26,共8页Journal of Southwest Petroleum University(Science & Technology Edition)

基　　金：国家高技术研究发展计划(863计划)(2013AA064501);国家十二五重大专项(2011ZX05018002-001)

摘　　要：针对元坝气藏须家河组三段致密砂岩储层,开展了岩性、物性、储集空间类型及主控因素的研究,对物性实验数据的分析及薄片观察结果表明,元坝地区须三段的储层岩性以粗—中粒钙屑砂岩为主,含部分中—细粒的岩屑石英砂岩;钙屑砂岩的储集空间以次生溶孔为主,且以粒内溶孔为主,同时有部分微裂缝。该段储层物性表现为孔隙度较高,渗透率较低,为裂缝-孔隙型储层。元坝地区须三段钙屑砂岩储层发育程度受控于沉积作用,水下分流河道是该套砂岩储层发育的主要微相,溶蚀作用及构造破裂作用是控制该套储层形成的主要地质因素。研究成果对元坝地区须三段的勘探开发具有一定的指导意义。Researches have been done on the lithologie character, physical property, reservoir space, and main controlling factor of the tight sand reservoir of the third member of Xujiahe Formation in Yuanba gas reservoir. The analysis of physical data and observation of thin section reveals that the lithology of sandstone reservoir is mainly coarse to medium calcarenaceous sand-stone with some medium to fine detritus quartz sandstone; calcarenaceous sandstone reservoir space is mainly secondary dissolved pore, with intergranular dissolved pores and crevices. Reservoir property is characteristic of low porosity and high permeability. Reservoir model is crevice and porosity reservoir. Sedimentary process controls the calcarenaceous sandstone reservoir development of the third Member of Xujiahe Formation in Yuanba gas reservoir. Underwater distributary channel deposit is the major microfacies in the calcarenaceous sandstone reservoir. Denudation and tectonic disruption are the major geologic factors. The research results are of significance in the exploration and development of the third Member of Xujiahe Formation in Yuanba gas reservoir.

关 键 词：钙屑砂岩 储层特征 成岩作用 须三段 元坝气藏 

分 类 号：TE122[石油与天然气工程—油气勘探]