There are fine local cap formations existing in upper and lower youshashan formation of jurassic system 侏羅系,下油砂山組,上油砂山組存在較好的局部蓋層。
The claystone seal formation of lower ganchaigou formation ( ? ) and upper ganchaigou formation ( nj ) has the character of large thickness and distributional stability , which is the regional cap formation in north rim of chaidamu basin 下干柴溝組( e _ 3 )與上干柴溝組( n _ 1 )泥巖蓋層具有厚度大、分布相對穩(wěn)定的特點(diǎn),是整個(gè)北緣地區(qū)的區(qū)域性蓋層。
Sedimentary control of coalbed methane in this region were expounded according to the control and influence of sedimentation on coal gathering action ( thickness of coal reservoirs , distributing and coal - bearing characteristics ) , on forming and distributing , maceral , organic facies and coalfacies , cap formation types and their sealing capability of adjoining rock 根據(jù)沉積作用對聚煤作用(煤儲(chǔ)層的厚度、分布及含煤性特征) ,對煤儲(chǔ)層的形成與展布、煤巖組成、有機(jī)相和煤相、頂?shù)装迳w層類型與封蓋性能的控制和影響,討論了沉積作用的控氣特征。
There are four kinds of fault , according to geometric character of fault , which are deep - seated fault , the fault surface cross cap formations but is not reach to ground , the fault surface cross to ground and ground fault . discuss the closure ability , based on the active stage and the lithlogic of two sides in fault 根據(jù)斷層幾何學(xué)特征和成因歷史分為四類:深部斷層、斷穿蓋層未至地表斷層、通天斷層及表皮斷層,以其活動(dòng)時(shí)期和斷層二盤巖性特征為基礎(chǔ),分類討論了封堵性。