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结合研究区的露头剖面、钻井岩心、测井资料等,对跃进地区下干柴沟组进行了高分辨率层序地层学研究,识别出由Ⅴ级层序界面控制的短期基准面旋回层序,按结构类型的不同划分为向上“变深”的非对称型、向上“变浅”的非对称型和对称型。阐述了研究区各类短期基准面旋回层序的砂体发育情况。对下干柴沟组中期、长期旋回层序进行了划分,识别出7个中期基准面旋回,3个长期基准面旋回,并预测了岩性油气藏发育的有利相带。
Based on the outcrop profile, drilling core and well logging data in the study area, high-resolution sequence stratigraphy of the Lower Ganchuagou Formation in the Yuejin area was studied, and the short-term base-level cycle sequence controlled by a Ⅴ-order sequence boundary was identified , According to the type of structure is divided into upward “deepen ” asymmetric type, upward “shallow ” asymmetric and symmetrical type. The sandbody development of various short-term basaltic cycles in the study area is described. The middle and long-term cycles of the Lower Ganchaigou Formation are divided into seven medium-term basal cycles and three long-term base-level cycles, and the favorable facies belts of lithologic reservoirs are predicted.