塔北隆起带沙参2井和轮南1井原油亲缘关系探讨

AN APPROACH OF THE RELATIONSHIP BETWEEN OILS FROM WELLS SHACAN 2 AND LUNNAN 1,TABEI UPLIFT

沙参2井位于塔北隆起中部的雅克拉—轮台构造带,轮南1井位于隆起的南部斜坡带上,两口井相距46km。本文通过对两口井原油的饱和烃及沥青质热解产物的生物标志物分析,探讨了两口井原油的亲缘关系,认为沙参2井原油比轮南1井原油经历了更长的二次运移过程;原油在历史上曾遭受过生物降解作用,后来又发生过一次原油的聚集。

Well Shacan No. 2, located in the Yakela-Luntai structural zone of the Tabei (Northern Tarim Basin) uplift, is 46 km away from well Lunnan No. 1, which is located in the southern slope of the uplift. Through the analysis of oiomarkers in saturated hydrocarbons and pyrolytic products of asphaltenes of oils from the two well, the author found that the oil from well Shacan No. 2 has the same source as the oil from well Lunnan No. 1, and that the former has undergone a secondary migration of longer range than the latter. The oils were biodegraded in the geological history and therea fter accumulated once again.