塔里木盆地阿克库勒凸起北部于奇探区是塔河油区外围重要的油气探区。以成盆、成烃和成藏理论为指导，应用盆地分析、储层预测、荧光薄片及流体包裹体分析等技术，综合研究了于奇探区哈拉哈塘组和阿克库勒组碎屑岩的油气成藏条件，建立了油气成藏演化模式。结果表明，区内油源主要来自阿克库勒凸起南部寒武系—下奥陶统烃源岩，油源较充足，具有一定的资源潜力；储集层类型以孔隙型为主，为大容积、中等—高渗透性储层，有利的储层分布区位于YQ3—YQ4—LX4—LX2井区一带；盖层封盖能力好，最有利的保存条件分布区位于于奇探区南部；圈闭类型主要为低幅度的构造圈闭和岩性圈闭;至少发生了3次油气注入成藏期，即燕山期、喜山早期和喜山晚期，油气分布主要受低幅度背斜和断层所控制；成藏模式为它源—双向排烃—多期次生成藏或古生新储—双向排烃—多期次生成藏，成藏演化经历了2个阶段。

Yuqi block is an important oil and gas exploration play of Tahe Oilfield  in the north of the Akekule arch, Tarim Basin.The oil and gas accumulating conditions in the Triassic Akekule and Halahatang Formation clasolites in Yuqi block  were studied, oil and gas accumulation models were established under the techniques of basin analysis, reservoir prediction, fluorescence thin section and fluidinclusion with the guidance of the theories of basin evolution, hydrocarbon generation, and oil and gas accumulation.It is demonstrated that the oil and gas in Yuqi block cames from Cambrian to lower Ordovician source rock in the south of the  Akekule arch, and Akekule and Halahatang Formation in Yuqi block has definite resources potential; The clasolites reservoirs types are porosity, and its porosity is high,and permeability is intermediate to high, the best reservoirs is located in the area where the Well YQ3, the Well YQ4, the Well LX4 and the Well LX2 are; the seal conditions of Triassic Akekule and Halahatang Formation mudstone seal rocks are fair, the best preservation region is located in the south of Yuqiblock; the traps types are mostly tectonic traps which are low scope, the oil and gas distributing is mostly controled by faults and anticlines which are low scope; there are three oil/gas charges, i.e., Yanshanian, early Himalayan and late Himalayan; the oil & gas accumulation model in Yuqi block is outward source-bidirectional expulsion of hydrocarbon-multistage accumulation or hydrocarbon sourced from the old rocks and preserved in the young rocks -bidirectional expulsion of  hydrocarbon-multistage accumulation,and its evolution has two stages.This  model has provided atheoretical fundament for the next exploration in Yuqi block and its vicinities.
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