许同;刘洛夫;汪洋;季焕成;宋光建;万青青;罗泽华;李晓中;李林泽;李婧仪;

• 1:中国石油大学(北京)油气资源与探测国家重点实验室

• 2:中国石油大学(北京)地球科学学院

• 3:中国石油新疆油田分公司风城油田作业区

摘要(Abstract)：

利用铸体薄片、扫描电镜、粒度分析、XRD等测试分析方法,研究乌尔禾—风南地区三叠系百口泉组碎屑岩储层成岩作用特征和孔隙演化过程。结果表明:研究区百口泉组碎屑岩储层主要为岩屑砂岩和长石岩屑砂岩,储集空间类型主要为残余粒间孔、粒内溶孔、微裂缝和收缩缝,经历机械压实—压溶、胶结、溶蚀等成岩作用及裂缝破坏,整体处于早成岩阶段B期—中成岩阶段A期,成岩演化序列依次为早期绿泥石胶结—黄铁矿胶结—石英次生加大边—黏土矿物胶结—方解石胶结—长石溶蚀及高岭石胶结—石英溶蚀。孔隙演化早期以机械压实减孔作用为主,中期钙质、泥质胶结减孔作用发育,后期长石、石英溶蚀增孔作用较强,黏土矿物的收缩及晚期构造裂缝的发育提高储层渗透率。储层孔隙演化阶段划分为压实减孔、压实胶结减孔和溶蚀裂缝增孔3个阶段,压实减孔平均为18.54%,胶结减孔平均为3.96%,溶蚀裂缝增孔平均为7.06%,综合成岩作用和孔隙演化的研究,建立研究区孔隙演化模型。该结果可为研究区储层的形成演化及成藏研究提供依据。

关键词(KeyWords)：成岩作用;孔隙演化;百口泉组;乌尔禾—风南地区;准噶尔盆地

Abstract:

Keywords:

基金项目(Foundation):中国石油新疆油田分公司项目(C4-16047)

作者(Author):许同;刘洛夫;汪洋;季焕成;宋光建;万青青;罗泽华;李晓中;李林泽;李婧仪;

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