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根据沉积演化特征,应用层序地层学分析方法对吐哈盆地台北凹陷侏罗系进行了研究,划分出塔克泉隆起带、南部缓坡带、东北部陡坡带等三种层序地层模式以及相应的三种成藏模式;从成岩作用入手探讨了台北凹陷侏罗系成岩演化特征,在剖面上划分了早期成岩机械压实和局部胶结作用成岩相、晚成岩Al亚期的溶解作用成岩相、晚成岩A2亚期和B亚期的再胶结作用成岩相等三个成岩序列。指出溶解作用、构造和压实作用产生的次生孔隙和裂隙改善了储层的储集性能;台北凹陷中西部应是油气勘探的重点区带,中深部的次生孔隙发育带可作为成岩圈闭油气藏的勘探对象。
According to the characteristics of sedimentary evolution, the Jurassic of the Taibei Sag in the Turpan-Hami basin was studied by means of sequence stratigraphy analysis. Three sequence stratigraphic models of the Tucker Spring uplift, the southern gentle slope and the northeastern steep slope, Based on the diagenesis, the diagenetic evolution of the Jurassic in the Taibei Sag was discussed. The diagenetic facies of the early diagenetic mechanical compaction and local cementation, diagenetic phase of the late-diagenetic Al-subfacies, Late diagenetic A2 and B sub-cementation of the secondary cementation diagenetic equal to three diagenetic sequences. It is pointed out that secondary pores and fissures caused by dissolution, tectonization and compaction improve the reservoir performance. The central-western part of the Taipei depression should be the key zone for oil and gas exploration. The secondary pore development zone in the middle-deep part may serve as the diagenetic zone Oil and gas exploration target.