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The middle and upper reservoir sandstones in the Penglaizhen Formation, Luodai gas field, western Sichuan
Author(s): YIN Chaoyun, WANG Li
Pages: 42-
46
Year: 2001
Issue:
4
Journal: SEDIMENTARY GEOLOGY AND TETHYAN GEOLOGY
Keyword: 洛带气田; 蓬莱镇组; 砂岩储层;
Abstract: 洛带气田蓬莱镇组中上部天然气藏的储层主要为三角洲前缘的水下分流河道、河口砂坝、水下决口河道和远砂坝微相砂体.储集空间以粒间孔和粒内溶孔为主.储集岩的孔隙度一般为8%~16%,渗透率均值为1.970×10-3μm2,属低中孔隙度、低渗透率储层.储渗性主要受方解石、硬石膏、长石含量和粘土矿物的影响.沉积微相控制了储层砂体的类型和展布特征.根据区内储集岩的岩石学特征、物性参数和孔喉结构特征,将其划分为四种类型.
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