西部古弧形带中浅层层序地层及沉积体系探讨

Discussion on Sequence Stratum and Sedimentary System of Middle and Shallow Beds in West Palaeoarcuate Zone

西部古弧形带中浅层是吐哈盆地勘探的主要层系,以高分辨率层序地层学理论为指导,综合运用岩心、钻井、测井及地震等资料对其进行层序地层学研究,通过连井剖面和各层序半旋回栅状对比图研究各层序的平面展布规律,结合各层序半旋回的沉积相研究及构造背景,预测出布尔加古凸起东斜坡和雁木西东北部两个地层岩性及低幅度构造油气勘探有利区。

Middle and shallow beds of palaeoarcuate zone in the west are the main series of stratum for exploration of Tuba basin. By taking high resolution sequence stratigraphy theory as guideline, combined application for the data, like core, well drilling, logging and seismic data, studies on its sequence stratigraphy are conducted. Based on the well tie profile and hemicycle grid correlation of various sequences, plane distribution regular of the sequences is studied. By combination of study on hemicycle sedimentary facies of various sequences and structure setting, the favorable exploration belts, including east slope of Boolean Add palaeoswell and two lithologic and low amplitude structures in the north -east of Yan Muxi are predicted.