CAJ | 학술논문

运用层序地层学有关理论和方法，在钻井资料的基础上，对和什托洛盖盆地下-中侏罗统煤系地层进行了层序地层学与聚煤规律研究。将其下-中侏罗统分为7个三级层序，其中八道湾组、三工河组、西山窑组分别划分出3、2、2个三级层序。通过连井剖面的对比建立了层序地层格架。低位体系域主要发育辫状河、辫状河三角洲、三角洲沉积，湖扩体系域主要发育滨浅湖沉积，高位体系域主要发育三角洲和滨浅湖沉积。煤层主要发育于湖扩期和高位期，相对快的基底沉降和适宜的物源补给对煤的聚集是有利的。
운용층서지층학유관이론화방법，재찬정자료적기출상，대화십탁락개분지하-중주라통매계지층진행료층서지층학여취매규률연구。장기하-중주라통분위7개삼급층서，기중팔도만조、삼공하조、서산요조분별화분출3、2、2개삼급층서。통과련정부면적대비건립료층서지층격가。저위체계역주요발육변상하、변상하삼각주、삼각주침적，호확체계역주요발육빈천호침적，고위체계역주요발육삼각주화빈천호침적。매층주요발육우호확기화고위기，상대쾌적기저침강화괄의적물원보급대매적취집시유리적。
Based on the principles and methods of the sequence stratigraphy,this study discuss the characteristics of the sequence stratigraphy and coal accumulation of the Jurassic in the Heshituoluogai Basin.3 third-order sequences in Bad-aowan formation,2 third-order sequences in Sangonghe formation,and 2 third-order sequences in Xishanyao formation are distinguished, respectively;Sequence stratigraphical frame was established by contrasting Well profile.The lowstand system tracts are mainly composed of braided river,braided river dalt,dalt sedments;the lake expansion tracts mainly com-posed of shore-shallow lake sedments,the highstand system tracts mainly composed of dalt and shore-shallow lake sed-ments.The coal seams are mainly developed in the lake-expansion and the high-stand system tracts.The relatively quik basin base subside and suitable source of supply is favorable to coal accumulation.