川中—川西须家河组三段致密砂岩储集层分类及成因<sup>*</sup>

川中—川西须家河组三段致密砂岩储集层分类及成因^*

金惠¹, 崔俊峰¹, 杨桂茹¹, 杨威¹, 肖佃师², 王志宏¹, 王民², 武雪琼¹, 薄冬梅¹

Classification and origin of tight sandstone reservoirs of the 3rd Member of Xujiahe Formation in central and western Sichuan Basin

JIN Hui¹, CUI Junfeng¹, YANG Guiru¹, YANG Wei¹, XIAO Dianshi², WANG Zhihong¹, WANG Min², WU Xueqiong¹, BO Dongmei¹

川中—川西地区须三段致密砂岩储集层孔隙和裂缝镜下特征 a—原生粒间孔和长石铸模孔,TN101-19,细砂岩,TN101井,2246.52 m,单偏光; b—原生粒间孔和绿泥石包裹,TN101-19,TN101井,2246.52 m,扫描电镜; c—粒间自生石英和残留粒间孔,TN101-19,TN101井,2246.52 m,扫描电镜; d—长石溶蚀铸模孔和残留粒间孔,QL12-35,QL12井,3979.17 m,粉—细砂岩,单偏光; e—粒间黏土矿物充填和残留粒间孔,QL12-35,QL12井,3979.17 m,扫描电镜; f—长石溶蚀孔,QL12-35,QL12井,3979.17 m,扫描电镜; g—溶蚀孔和黏土矿物晶间孔,Q5-6,中—细砂岩,Q5井,2284.3 m,单偏光; h—白云石溶蚀孔、晶间孔和黏土矿物晶间孔,Q5-6,Q5井,2284.3 m,扫描电镜; i—长石溶蚀孔和黏土矿物晶间孔,Q5-6,Q5井,2284.3 m,扫描电镜; j—构造微裂缝,W4-17,含砾粗砂岩,W4井,3588.32 m,单偏光; k—成岩收缩缝,PL2-6,粉砂岩,PL2井, 3427.65 m,单偏光; l—构造微裂缝和边缘溶蚀,G3-1,中—细砂岩,G3井,3720.6 m,单偏光