渭河盆地天然气资源前景

Caili ZHANG,Jianwu ZHANG,Zhenghong CAI,Yajuan YANG,Gang LIU,Zhanrong MA,Yan ZHANG

Journal of Chengdu University of Technology(Science & Technology Edition)（2019）

Cited 2|Views14

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Abstract

为探讨渭河盆地天然气资源前景,从野外露头、地震资料等方面入手,结合前人相关研究资料,对渭河盆地天然气赋存层位、类型、成藏条件进行了分析.结果表明:渭河盆地广泛发育生物气、煤型热解气以及稀有气体——氦气.上新统张家坡组烃源岩厚度大,Ro＜0.5％,处于生物气生气阶段,储盖条件好,具备形成生物气的基础地质条件,固市凹陷是生物气资源量富集区;煤型热解气与氦气产于张家坡组以下地层,与地热水相伴生,甲烷碳同位素值与鄂尔多斯盆地上、下古生界天然气一致,推测气源来自于古近系或下古生界;渭河盆地水溶性天然气中氦气含量达到开发利用的工业标准.渭河盆地存在多种天然气资源,固市凹陷是最有利的勘探前景区.

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