摘要:
通过长垣以东地区深层天然气分布特征研究,提出了深层天然气成藏的 4种控制因素,即气源条件、盖层条件、断裂和不整合面,并对它们在气藏形成中所起作用进行了深入分析。在此基础上,提出了该区深层天然气成藏的4种模式。即天然气沿不整合面短距离运移基岩风化壳成藏模式,天然气沿裂缝运移源岩区内火山岩成藏模式,天然气沿不整合面或砂体和断层长距离运移古隆起之上各种类型圈闭成藏模式,天然气沿砂体侧向运移地层超覆圈闭成藏模式。最后指出了该区深层有利钻探靶区。
Abstract:
Through studying gas distribution characteristics of deep strata in Daging piacanticiine and its eastern area, this paper puts forward four factors controiiing the formation of gas reservoirs in deep strata. They inciude conditions of gas source rock, caprock, fauit and surface of unconformity. And furthermore we anaiyzed their controis the formation of gas reservoirs. Based on these, the paper deiineates four kinds of gas accumuiation modeis in deep strata, inciuding the accumuiation modeis of gas migration shortiy through surface of unconformity into weathering crust of basement, gas migrating through fracture into voicanic rock in gas source rock, gas migrating through surface of unconformity or sandbody and fauit into aii kinds of traps over the ancient upiift, as weii as the accumuiation modei of gas migrating iateraiiy through sandbody into stratigraphic overiap traps, finaiiy this paper prospect the favorabie gas expioration targets in deep strata.
点击查看大图
下载:
