准噶尔盆地车排子凸起侏罗系齐古组沉积相分析及储层展布——以车60井区齐古组地层—岩性油气藏为例

Facies of the Jurassic Qigu Formation and Distribution of Reservoir in the Chepaizi Uplift,Junggar Basin:A case study on Qigu Formation stratigraphic-lithologic reservoirs in Well Che 60 Block

侏罗系齐古组为准噶尔盆地重要的含油气层系,其层序发育较完整,沉积相类型丰富。综合利用岩芯、测井、录井及相关测试资料,在沉积特征分析的基础上,对车排子车60井区齐古组沉积微相进行了系统研究。确定研究区齐古组主要为砾岩、砂岩、细砂岩、粉砂岩和泥岩构成的一套碎屑岩多旋回沉积组合,为典型的辫状河三角洲相沉积,其物源主要来自于北西和正北方向。平原辫状分流河道微相砂体为储集层骨架砂体,储集性能较好,前缘分支河道微相砂体及河口砂坝次之,为油气运移聚集的有利相带。该研究成果为油田开发方案的调整和动态分析提供了可靠的地质依据。

Qigu Formation of Jurassic was significant oil-bearing strata in Junggar basin, its sequence had developed completely, and the sedimentary facies type was very rich. Comprehensive utilization of core, logging, mud logging and related testing information;In addition,based on the analysis of the sedimentary characteristics, sedimentary mi- crofacies of Qigu Formation in Well block-Che60 have been systematically studied. The results showed that the prove- nance source of Qigu Formation source came from the north-west and north direction mainly. Target layer was the brai- ded river delta, the sand body of Channel bar was the framework for the reservoir, whose reservoir property was the best; followed channel mouth bar, underwater distributary channel was the most favorable sedimentary facies of Oil and gas migration and accumulation. Results of its research had provided reliable geological basis for development plan and dynamic ananlysis of the oil field.