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地球学报  2009 

川西拗陷上三叠统气田水化学形成演化的重溯

DOI: 10.3975/cagsb.2009.05.13

Keywords: 水化学,形成演化,上三叠统,川西拗陷

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Abstract:

本文在研究区沉积演化、构造演化和上三叠统含水系统、水文地质期定位的基础上,论证了T3x2水起源于35g/kg的海相同生沉积盐水,经历了沉积、沉压埋藏、构造热液3个“期”的浓缩盐化正向变质,演化成为最高浓度160g/kg的海相后生沉积孔隙裂隙卤水、浓卤水;T3x4、T3x6水均起源于陆相同生沉积淡水,T3x4经历了沉积、沉压埋藏—淋滤、沉压埋藏、构造热液4个“期”,主要是高度浓缩盐化正向深变质,演化成为最高浓度100g/kg的后生沉积孔隙裂隙盐卤水;T3x6与T3x2经历的期相同,经高度浓缩盐化正向深变质,演化成为最高浓度84g/kg的后生沉积孔隙裂隙盐卤水。

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