白家海—五彩湾地区位于准噶尔盆地东北缘,侏罗系构造圈闭不发育,隐蔽油气藏已成为主要勘探目标。为满足隐蔽油气藏勘探的需要,提高储集层、隔层预测的精度,根据高分辨率层序地层学基准面旋回原理,通过钻井、测井和地震资料综合分析,在侏罗系识别出12个基准面升降的转换面,根据基准面旋回划分,将侏罗系自下而上划分为Ⅰ、Ⅱ、Ⅲ、Ⅳ、Ⅴ、Ⅵ等6个三级层序、11个四级层序。根据精细地层对比分析,侏罗系隐蔽油气藏的圈闭主要是位于层序Ⅲ基准面下降期湖退三角洲前缘砂体和层序Ⅴ、Ⅵ基准面上升期的河道砂体。图3参18 The Baijialu-Wucaiwan area is located in the northeastern margin of the Junggar Basin, and the Jurassic structural traps are not well developed. Subtle reservoirs have become the major exploration targets. In order to meet the need of subtle reservoir exploration and improve the precision of reservoir and interval prediction, based on the principle of high-resolution sequence stratigraphy plane cycle, through the comprehensive analysis of drilling, logging and seismic data, According to the datum plane gyration, the Jurassic strata are divided into six third-level sequences Ⅰ, Ⅱ, Ⅲ, Ⅳ, Ⅴ, Ⅵ from the bottom up and eleven fourth-level sequences . According to the comparative analysis of fine strata, the traps of the sub-Jurassic subtle reservoirs are mainly channel sandbodies located in the front of sandstorm delta and the Ⅴ and Ⅵ rising stages of the lake basins in the falling sequence of sequence Ⅲ. Figure 3 reference 18