辽河西部凹陷南段沙三段致密砂岩储层物性特征及主控因素分析  

Characteristics and controlling factors of tight sandstone reservoir of the third member of Shahejie Formation in the southern West Depression,Liaohe Basin

作　　者：孙红华[1] 李旭平[1] 钟建华[2,3] 范伟 刘磊[1] 周娇[5] 

机构地区：[1]山东科技大学地质科学与工程学院,山东青岛266590 [2]中国石油大学(华东)地球科学与技术学院,山东青岛266590 [3]中国科学院广州地球化学研究所,广东广州510640 [4]中国石油集团渤海钻探工程有限公司第二录井分公司,河北任丘062550 [5]中国地质大学(北京)能源学院,北京100083

出　　处：《岩性油气藏》2013年第6期53-61,共9页Lithologic Reservoirs

基　　金：山东科技大学地质科学与工程学院科研团"造山带岩石成因及成矿作用"(编号:2012D2TD02)资助

摘　　要：致密砂岩优质储层预测与评价研究的难度较大。通过对大量岩心、铸体薄片及普通薄片的观察鉴定,结合录、测井资料,扫描电镜,黏土矿物X射线衍射分析,对辽河西部凹陷南段沙三段致密砂岩储层的岩石学特征和物性特征进行了研究,并分析了影响该储层物性的主要因素。结果表明:该储层岩石为低孔-低渗和特低孔-特低渗致密砂岩;碎屑颗粒以岩屑和长石为主,具有较低的成分成熟度;颗粒接触关系主要为线接触和点—线接触;孔隙度与渗透率在储层内部纵向和横向上的变化较大,储层的非均质性强;控制储层物性的因素主要为物源、沉积作用、成岩作用、沉积体系、构造条件和异常压力。通过对该储层物性特征的主控因素的分析,可为致密砂岩优质储层的预测与评价及致密砂岩气藏的勘探开发提供依据。By means of observation of core samples, casting thin sections and ordinary thin sections, combined with recording, logging data, scanning electronic microscope and clay mineral X-ray diffraction analysis, this paper studied the petrology characteristics and physical properties of the tight sandstone reservoir of the third member of Shahejie Formation in the southern West Depression, and analyzed the main influencing factors for reservoir properties. The result shows that the reservoir rock is composed of tight sandstone with low to ultra-low porosity and low to ultra-low permeability; with lithic and feldspar as its main components, the detrital grain has low compositional maturity; grain contacts aremainly line contact and point-line contact; porosity and permeability are different in the vertical and the horizontal sections of the reservoirs, and the reservoir heterogeneity is strong; the main factors that affect the reservoir properties are source, sedimentation, diagenesis, depositional systems, tectonism and abnormal pressure. The analysis of the dominant factors of the physical properties of tight sandstone reservoir can provide basis for the prediction and evaluation of high-quality tight sandstone reservoirs and exploration and development of tight sandstone gas reservoirs.

关 键 词：致密砂岩 储层物性 沉积作用 成岩作用 辽河凹陷 

分 类 号：TE122.23[石油与天然气工程—油气勘探]