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Reservoir characteristics and controlling factors of the Triassic clastic rocks in the Liangbei region, Xinjiang
Author(s): ZHANG Yu-xi, ZHOU Jiang-yu, LI Xiao-feng
Pages: 66-
71
Year: 2012
Issue:
2
Journal: Sedimentary Geology and Tethyan Geology
Keyword: 储层特征; 控制因素; 碎屑岩; 三叠纪;
Abstract: 运用钻井岩心、铸体薄片、扫描电镜等资料,研究了两北地区三叠系深部碎屑岩储层的特征及储层发育的控制因素.研究表明,三叠系主要岩石类型为长石岩屑砂岩和岩屑砂岩,具有成分成熟度低和结构成熟度中等的岩石学特征.储集空间以粒间溶孔为主,其次为裂缝,属于中孔、中-低渗型储层.在后期成岩作用的改造下,储集性能明显变好.分流河道和河口坝砂岩具有良好储层物性,方解石、长石、岩屑在大气水和有机酸的溶蚀作用下,产生大量的溶蚀孔隙,改善了储集性能,溶蚀作用是形成优质深部碎屑岩储层的关键因素.
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