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OALib Journal期刊
ISSN: 2333-9721
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塔里木盆地满东1致密气藏成因机制
Keywords: 致密气藏,油气充注,物性演化,成因机制,满东1气藏,塔里木盆地
Abstract:
？满东1气藏是塔里木盆地东部典型的致密砂岩气藏，但其成因机制研究亟待加强。利用流体包裹体岩相学观察、均一温度测试、定量颗粒荧光分析等手段厘定了油气充注史，应用储层孔隙度演化模型恢复了储层孔隙度演化史，并综合两者之间的关系明确了满东1致密气藏的成因类型和成藏机制。研究结果表明：满东1气藏天然气主要源自寒武系—中下奥陶统烃源岩，此气藏具有2期油气充注历史，即晚加里东—早海西期的石油充注和晚燕山期—喜马拉雅期以来的天然气充注|满东1气藏志留系柯坪塔格组储层在燕山末期致密化，形成现今的致密储层|喜马拉雅期，寒武系、奥陶系古油气藏内的原油裂解气在志留系储层中成藏，此时储层已致密化，即天然气充注期晚于储层致密期，因此满东1气藏的成因类型属于先致密后成藏型“致密深盆气藏”。综合分析后认为，满东1气藏原油裂解气勘探前景广阔，特别是下古生界具有良好的资源前景。：
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