苏里格气田西部主要含气层段储层特征  

Characteristics of major gas-bearing reservoirs in western Sulige Gas Field

作　　者：谢庆宾[1] 谭欣雨[1,2] 高霞[3] 梁新平[1] 赖长洁[1] 王志芳[1] 

机构地区：[1]中国石油大学(北京)地球科学学院,北京102249 [2]中国石化中原油田分公司采油五厂,河南濮阳457001 [3]中国石油勘探开发研究院,北京100083

出　　处：《岩性油气藏》2014年第4期57-65,共9页Lithologic Reservoirs

基　　金：国家自然科学基金项目"辉绿岩热液作用对围岩储层影响的机理研究"(编号:41272162)资助

摘　　要：苏里格气田西部储层主要发育于二叠系下石盒子组盒8段及山西组山1段,其中山1段为网状河沉积,盒8下亚段为辫状河沉积,至盒8上亚段演变为曲流河和网状河沉积。研究区主要含气层段储层岩石类型主要为岩屑砂岩和岩屑质石英砂岩,含有少量石英砂岩,具有成分成熟度低的特征。储层孔隙空间常以组合形式出现,以岩屑溶孔和晶间孔为主,含少量的原生粒间孔。储层孔隙结构具有孔喉小、排驱压力高和主贡献喉道小的特征,平均孔隙度为6.23%,平均渗透率为0.4 mD,为低孔、低渗储层。成岩作用研究认为,盒8段和山1段储层目前均处于中成岩阶段B亚期,储层物性主要受沉积微相的控制以及成岩作用的影响,非均质性明显。In western Sulige Gas Field, the eighth member of Shihezi Formation and the first member of Shanxi Formation are the major gas-bearing reservoirs. Shan 1 member developed anastomosing river deposit, and He 8 member developed braided river deposit, in which the facies transited from braided river to meandering and anastomosing river from bottom to top. The rock types of the main gas-bearing reservoirs are lithic sandstone and lithic quartz sandstone, with little quartz sandstone, and they are characterized by low compositional maturity. Pore spaces always occur as the combination form, the pore types are mainly composed of debris dissolved pores and intercrystal pores, and little primary intergranular pores. The pore structure has features of small pore-narrow throat, high displacement pressure and narrow main contribution throat. The average porosity is 6.23%, while the average permeability is 0.4 mD, so the reservoir is characterized by low porosity and low permeability. On the basis of diagenesis analysis, the reservoir is in the middle diagenetic phase B. The reservoir properties are mainly controlled by sedimentary microfacies and diagenesis, and the heterogeneity is strong.

关 键 词：沉积微相 成岩作用 储层特征 盒8段 山1段 鄂尔多斯盆地 

分 类 号：TE122.2[石油与天然气工程—油气勘探]