准噶尔盆地中部2、4区块侏罗系头屯河组物源体系研究

侏罗系头屯河组已成为准噶尔盆地中部2、4区块重点突破层系,而目前该区勘探程度较低,对物源体系的认识不清,影响了对其砂体类型及展布特征的研究,制约了该区岩性油气藏的勘探进程。综合利用最新钻井、地震等资料,结合周边野外踏勘,并在前人研究基础上,对该区头屯河组物源体系展开综合分析。结果表明,研究区头屯河组物源主要受北东向克拉美丽山控制,在区内形成了一套三角洲-湖泊沉积体系,三角洲分流河道砂和滩坝为主要的储层类型。

Provenance system research of Jurassic Toutunhe formation in 2,4blocks of the middle of Junggar basin

Jurassic Toutunhe formation has become a key breakthrough in 2,4 blocks of the middle of Junggar basin,while the prospecting degree is low and the understanding of source system is unclear at present,which greatly affected the research on sand body types and distribution characteristics,and hindered the process of lithologic reservoir exploration in this region.With comprehensive utilization of the latest drilling and seismic data,combined with peripheral field reconnaissance,and on the basis of previous studies,a comprehensive analysis of provenance systems of Toutunhe formation has been carried out.The results indicate the provenance is mainly controlled by north-east Kelameili Mountain,and a delta- lake sedimentary system has been formed.Through the research,the main reservoir types have been made clear,namely the delta distributary channel sand dam and the beach bar.