准噶尔盆地腹部莫北地区三工河组油藏在晚第三纪普遍遭受了掀斜改造作用.为探索顶板泥岩隔层厚度对后期掀斜导致油气散失效应的抑制作用,对莫北地区三工河组油藏成藏主控因素进行了综合分析.认为晚第三纪后期的喜山掀斜作用对准噶尔盆地莫北地区三工河组油藏的次生改造作用很大,致使M109井区J<,1>s2<'2-1>油藏的油气基本散失殆尽,顶部的J<,1>s2<'1-2>油藏也遭受不同程度的破坏.通过对该区探井、评价井的整体分析及局部开发井区的量化模拟,得出该区J<,1>s2<'2-1>油藏形成工业产能所需的顶板泥岩隔层厚度为8～14 m.为该区的油藏整体评价和开发井网部署提供了有利的技术支持.%The reservoirs in Sangonghe Formation of Mobei area in the abdomen of Junggar Basin almost experienced the tilting reformation during Neocene. In order to investigate the inhibiting effect of ceiling shale barrier thickness on hydrocarbon loss effect caused by late tilting movements, the comprehensive analysis of main reservoir-forming controlling-factors of reservoirs in Sangonghe Formation in Mobei area is conducted. It is thought that Xishah tip-tilting during the late stage of Neocene has a great secondary reformation effect on reservoirs in Sangonghe Formation of Mobei area in Junggar Basin, which almost leads the entire oil-gas loss of J1s22-1reservoir in M109 well field and causes different damages to the top J1s21 -2 reservoir. Through the overall analysis of prospecting and appraisal wells in this area and the quantitative simulation of local development well field, it is concluded that the ceiling shale barrier thickness required for industrial productivity formed by J1s22-1 reservoir in this area is 8-14m, providing favorably technical supports for overall reservoir evaluation and development well pattern deployment in this area.
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