塔北隆起羊塔克构造带油气成藏分析

羊塔克构造带位于塔北隆起的西端 ,属于库车油气系统的前缘隆起带。邻区的油气勘探结果显示 ,早期属塔北隆起、后期属库车前陆盆地前缘张性隆起构造带的羊塔克、牙哈、玉东及英买 7等构造带具有陆相 (前渊凹陷的三叠侏罗系源岩 )和海相 (被动边缘的寒武奥陶系源岩 )双重油气来源 ,并具有上部碎屑岩 (构造 )和下部碳酸盐岩 (潜山 )含油气的特点。据推测 ,羊塔克构造带除已发现的白垩系下第三系构造油气藏外 ,尚有相应层系的地层油气藏和下部碳酸盐岩 (潜山 )油气聚集 ,具有一定的勘探前景。

ANANYSIS ON RESERVOIR FOMATION PROCESS IN YANGTAKE STRUCTURAL BELT OF TABEI UPLIFT

Yangtake structural belt is located in the west of Tabei uplift and belongs to Kuche petroleum system in petroleum system classification. The structural belts of Yangtake, Yaha, Yudong and Yingmai 7 belong to Tabei uplift in earlier stage and to the extensional uplift belts of Kuche foreland basin in later stage. The result of petroleum exploration in near areas reveals that Yangtake structural belt has the characteristics of clastic rock anticline oil and gas bearing in upper part and carbonate rock buried\|hill oil and gas bearing in lower part. The belt also has dual\|source rocks of oil and gas involving both Triassic\|Jurassic nonmarine source rocks in foredeep and Cambrian\|Ordovician marine source rocks. It is predicted that there exist both Creterous-Eogene clastic stratigraphy and carbonate buried-hill reservoirs after Creterous-Eogene structure reservoir has been found in Yangtake structural belt.