准噶尔盆地白家海凸起阜北斜坡区油气运移示踪分析

Tracer Analysis of Hydrocarbon Migration In Baijiahai Arch-Fubei Slope of Junggar Basin

白家海凸起区位于准噶尔盆地中央隆起带东段,油气源情况较为复杂,对油气的运移的研究是了解油气藏形成规律的重要环节。利用原油物性、生物标志化合物及芳烃化合物等分析方法对该区进行油气运移研究,发现c31井区的油气存在多个运移方向,即c36井到c31井区,c49井到c31井区和阜康凹陷到c31井区,说明油气来自南面的阜康凹陷和北面的东道海子凹陷。在白家海凸起部位油气运移的主体方向是自西向东北,即油气从c31井区运移到彩南油田,最后调整到c8井区。同时油气也从阜康凹陷运移到沙北油田。

Baijiahai Arch is located in the east of the central uplift belt in Junggar Basin,oil and gas source is more complicated.The hydrocarbon migtation study can understand the genetic mechanism of the kind of the hydrocarbon pool.Through utilizing crude oil physical property and the biomarker to research the hydrocarbon migration in the region,it is found that there are several migration directions in C31 well field,hydrocarbon migration paths are from Wellblock C36 to Wellblock C31,from Wellblock C49 to Wellblock C31 and from Fukang Sag to Wellblock C31,it indicates that hydrocarbon is from Fukang Sag and Dongdaohaizi Sag,the main path of hydrocarbon migration is from west to northeast,from Wellblock C31 to Cainan Oilfied,and finally to Wellblock C8.While the path of hydrocarbon migration is from Fukang Sag to Shabei Oilfied.