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中国南方膏盐岩分布特征
金之钧 龙胜祥 周雁 沃玉进 肖开华 杨志强 殷进垠
摘 要:全球膏盐岩盖层虽然所占比例较小,但封盖了大多数已发现油气储量,并且是许多大型、特大型油气田的主要盖层,对油气聚集与保存具有重要意义.中-下三叠统膏盐岩盖层与四川盆地天然气分布的密切关系也表明,膏盐岩分布特征研究是认识、评价中国南方天然气保存条件不可忽视的重要因素之一.膏盐岩主要形成于盆地发展演化的中、后期.在中国南方,膏盐岩盖层主要发育于中-下寒武统、石炭系、中-下三叠统及白垩系-古近系,但分布不均,其封盖作用的重要性差异很大.受沉积、构造环境及后期破坏作用的影响,中-下寒武统膏盐岩主要分布在四川盆地东、南部及黔西北地区;石炭系膏盐岩盖层主要分布在湘中区;白垩系-古近系膏盐岩盖层主要发育于江汉盆地.中-下三叠统膏盐岩厚度最大、分布最广,对区内天然气的封盖作用最为重要,对四川盆地、黔北区、楚雄盆地及中、下扬子部分地区的天然气都起到重要的封盖作用.
关键词:保存条件;膏盐岩;海相沉积;油气成藏;中国南方
分类号:TE112.2 文献标识码:A
文章编号:0253-9985(2006)05-0571-13
A study on the distribution of saline-deposit in southern China
Jin Zhijun Long Shengxiang Zhou Yan Wo Yujin Xiao Kaihua Yang Zhiqiang Yin Jinyin
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基金项目:国家重点基础研究发展规划(973)项目(2005CB422100)
作者简介:金之钧(1957-),男,教授、博士生导师,石油地质
作者单位:金之钧(中国石油化工股份有限公司,石油勘探开发研究院,北京,100083)
龙胜祥(中国石油化工股份有限公司,石油勘探开发研究院,北京,100083)
周雁(中国石油化工股份有限公司,石油勘探开发研究院,北京,100083)
沃玉进(中国石油化工股份有限公司,石油勘探开发研究院,北京,100083)
肖开华(中国石油化工股份有限公司,石油勘探开发研究院,北京,100083)
杨志强(中国石油化工股份有限公司,石油勘探开发研究院,北京,100083)
殷进垠(中国石油化工股份有限公司,石油勘探开发研究院,北京,100083)
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