焉耆盆地四十里城斜坡带滩坝砂成因探讨及勘探潜力分析

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在焉耆盆地四十里城斜坡带侏罗系八道湾组识别出了滩坝砂体沉积组合,这些滩坝砂体与有效烃源岩共生,储集性能较好,生储盖组合配置较为完善,具备良好的岩性油气藏形成条件,且受后期构造运动的改造和破坏较弱,后期保存条件好。加强对四十里城斜坡滩坝砂的综合勘探,有望打开焉耆盆地一个全新的勘探领域。综合研究认为,除了充足的物源、较好的水动力条件和适合滩坝砂发育的古地貌控制外,该区滩坝砂体的发育还与坡折带以及强制水退沉积密切相关。
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