The reservoir rocks consist of conglomerate, pebbly sandstone, medium-fine sandstone and siltstone.
储层岩石类型有砾岩、含砾砂岩、中细砂岩及粉砂岩。
Lithology of the Chang-8 oil reservoirs is mainly fine-medium lithic feldspathic sandstone and feldspathic detritus sandstone.
长8油层组储层岩性以细—中粒岩屑长石、长石岩屑砂岩为主。
The Upper Triassic Series in the Zixing-Rucheng coalfield in southeastern Hunan is a set of grayish black sandy mudstone, fine sandstone, medium coarse sandstone and coal seams combination.
湘东南地区资汝煤田上三叠统为一套灰黑色砂质泥岩、细砂岩、中粗粒砂岩以及煤层等沉积组合，具有砂泥薄互层层理、斜波状层理、水平层理及大型交错层理等沉积结构。
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