莫里青奢领组构造解释与构造圈闭识别

莫里青断陷是伊通盆地的一个二级构造单元。结合盆地基底形态、断裂分布特征、地层构造特征、盆地构造演化历史、盆地油气勘探现状等,莫里青断陷可进一步划分为西北缘断褶带、靠山凹陷、小孤山断阶带、尖山隆起带等三级构造单元。莫里青断陷的发育受控于近于平行的东、西两条边界断裂,即西北缘和东南缘边界断裂。断裂构造是伊通盆地最主要的构造类型之一,包括控盆边界断裂、盆地发育过程中产生的内部断裂及后期盆地反转挤压和基底隆升作用形成的断裂,它们形成数量众多、规模不等、走向不一、性质各异、形成时期不同的复杂断裂系统。分析构造圈闭形态演化、圈闭形成和破坏时期,再结合生、排烃时间和油气运移路径有效性分析,可对构造圈闭有效性、盆地油气资源前景作出合理的评价。

Structural Interpretation and Structural Trap Identification in Sheling Group, Moliqing Area

Abstract: Moliqing depression is a secondary Yitong Basin tectonic unit, with basement morphology, distribution of faults, stratigraphic structural characteristics, the history of tectonic evolution, basin oil and gas exploration status, etc. Moliqing depression can be further divided into the Northwest margin fault fold belt, backing depression, Xiaogushan fault zone, such as Eagle's Nest Uplift three tectonic units. Moliqing controlled the development of depression nearly parallel to the east and west two boundary faults, the northwest edge and the southeast boundary fault. Yitong Basin faults is the main structural types, including the control basin boundary fault, the basin produced during the development of an internal fault and post-compression and basin inversion uplift the formation of basement faults, which form a large number of scale range, to the different, varied in nature, the formation of the complex fault system in different periods. Analysis of the shape of the structural trap, trap formation and destruction times, combined with hydrocarbon generation and expulsion time and the effectiveness of hydrocarbon migration pathway analysis, the effectiveness of structural traps, basin oil and gas resources make a reasonable assessment of prospects.