CAJ | 학술논문

　　基于烃源岩生排烃基本原理,利用TOC含量与热解S1,氯仿沥青“A”含量的关系确定了营尔凹陷下白垩统主要层段有效烃源岩的有机碳含量下限值,其中下沟组有效烃源岩的TOC含量下限值为0.8%,赤金堡组为0.6%。与单井的测井TOC含量预测成果相结合,识别并统计了单井有效烃源岩厚度,最终综合层序地层学和沉积相研究成果确定了主要层段有效烃源岩的展布特征。各层段的有效烃源岩均比较发育,其中以赤金堡组厚度最大,其次为下沟组上段。下沟组下段厚度总体偏低,但北部次凹有效源岩厚度最大亦可达250 m,南部次凹最大为200 m。
　　기우경원암생배경기본원리,이용TOC함량여열해S1,록방력청“A”함량적관계학정료영이요함하백성통주요층단유효경원암적유궤탄함량하한치,기중하구조유효경원암적TOC함량하한치위0.8%,적금보조위0.6%。여단정적측정TOC함량예측성과상결합,식별병통계료단정유효경원암후도,최종종합층서지층학화침적상연구성과학정료주요층단유효경원암적전포특정。각층단적유효경원암균비교발육,기중이적금보조후도최대,기차위하구조상단。하구조하단후도총체편저,단북부차요유효원암후도최대역가체250 m,남부차요최대위200 m。
Based on the basic theory of hydrocarbon generation and expulsion of source rock, TOC content, pyroly-sis parameter S1 and chloroform bitumen“A” content have been correlated to confirm the lowest limit of TOC con-tent of effective source rocks from the Lower Cretaceous in the Yinger Sag. The lowest limit of TOC content of effective source rocks from the Xiagou Formation is 0.8%, while that from the Chijinbu Formation is 0.6%. Combi-ning with the prediction from TOC content by single well logging, the thickness of effective source rock in single well has been calculated. The distribution of effective source rock in main layers has been confirmed combining the studies of sequence stratigraphy and sedimentology. Effective source rocks are well-developed in each layer, among which those in the Chijinbu Formation have the biggest thickness, and the Upper Xiagou Formation the second. In the Lower Xiagou Formation, effective source rocks are thin; however, they may increase to 250 m thick in the northern subsag, and 200 m thick in the southern subsag.