摘要
本文在介绍了准噶尔盆地小渠子地区构造、地层的基础上,对三套气源岩进行热演化研究后认为:芦草沟组在工区北部生成凝析油和湿气,对天然气资源有一定的贡献;小泉沟群仅北部地区成熟,贡献很小;山前凹陷中下侏罗统煤系地层白垩纪末期已大量生成干气,又有推举带前缘断裂作运移通道,可成为工区主要的气源岩,因此,工区北部气源充足,构造形成时间与天然气生成时间配置得当,含气远景好。喀拉扎背斜和推举带前缘断裂下盘是含气远景最好的构造。
Based on the structures and strata characteristics of Xiaoquzi area in Junggar Basin,the study of thermal alterna-tion for three groups of gas source rocks has been made in this paper. It is considered that oil condensate and wet gasmay be generated in Lucaogou formation of northern part of the area which made soma contribution of natural gas re-sources to it. While Xiaoquangou group had few contribution due to mature area only occurred in the northern part. Inlate Cretaceous,a great quantity of net gas had been generated in Middle-Lower Cretaceous coal seams located in thepre- mountain seg,and there were nappe frontal faults as hydrocarbon migration pathways,which is an important gassource rock in this area. Therefore,it is concluded that sufficient gas source mainly occurred in northern part,pessess-ing a good fitting between structure-forming period and gas-generating time,and a favorable gas bearing prospec-tives. Kalaza anticline and the foot wall of nappe frontal fault belong to best structures for gas besting prospectives.
出处
《新疆石油地质》
CAS
CSCD
北大核心
1993年第2期178-187,共10页
Xinjiang Petroleum Geology
关键词
唯噶尔盆地
天然气
烃源岩
地层
Junggar Basin
Xiaoquzi area
Gas-bearing prospective
Kalaza anticline
Foot wall of nappe frontal fault
