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Study and Application of Fluid Inclusion in Petroleum Exploration in Weizhou Formation in Weixinan Depression of Beibuwan Basin
Author(s): 
Pages: 34-38
Year: Issue:  4
Journal: Offshore Oil

Keyword:  涠西南凹陷流体包裹体断裂带断块型圈闭;
Abstract: 涠西南凹陷是一个复杂断陷型富生烃凹陷,发育了一系列断裂带,涠洲组多以小型断块型油藏为主,构造极其复杂,一批断块圈闭的高部位是否成藏仍很难落实.WZ11-7N-3井涠洲组未见油气显示,圈阅高部位侧钻井WZ11-7N-3Sa,涠洲组三段见68 m油斑显示,油层62.1 m.对WZ 11-7N-3井岩屑资料进行流体包裹体化验,证实与3Sa井油层对应的砂组,含烃流体包裹体含量明显高于水层含烃类包裹体,均在30%以上;与3Sa井水层对应的砂组盐水包裹体含量明显高于油层对应砂组的盐水包裹体,均在80%以上,勘探实践证实在高部位已经成藏.复查老井,通过流体包裹分析,可以落实一批类似的断决型圈闭高部位是否成藏,增加储量,提高探井的成功率,短期内就可以指导勘探评价,该研究思路值得推广使用.
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