岩性油气藏 ›› 2024, Vol. 36 ›› Issue (6): 98109.doi: 10.12108/yxyqc.20240610
闫雪莹1, 桑琴1, 蒋裕强1,2, 方锐1, 周亚东1, 刘雪3, 李顺4, 袁永亮1
YAN Xueying1, SANG Qin1, JIANG Yuqiang1,2, FANG Rui1, ZHOU Yadong1, LIU Xue3, LI Shun4, YUAN Yongliang1
摘要: 在致密灰岩储层特征认识的基础上,利用薄片鉴定、测井响应、叠前地震波形指示反演(SMI)等方法对四川盆地公山庙西地区大安寨段致密灰岩储层特征及高产主控因素展开了详细研究。研究结果表明:①四川盆地公山庙西地区大安寨段灰岩储层可分为厚层型和薄层型2种类型。灰岩储层平均孔隙度为1.2%,平均渗透率为0.05 mD,为特低孔、低渗储层,储集空间主要为次生溶孔和微裂缝;②根据断层规模、断穿层位及平面上的断距,将研究区断层分为一级、二级和三级,其中大安寨段主要受一级和二级断层影响,与断层伴生的裂缝体系有效改善了储层物性;③研究区有利相带控制了油气的分布,断储配置关系控制了油藏的产能,可分为“薄层灰岩+一级断缝”与“厚层灰岩+一级/二级断缝”2种高产模式。
中图分类号:
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