| 四川盆地中三叠统雷口坡组雷三、雷四段盐岩沉积环境与成因研究 |
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| 引用本文： | 黄东,袁家林,沈浩,汪华,石学文.四川盆地中三叠统雷口坡组雷三、雷四段盐岩沉积环境与成因研究[J].盐湖研究,2014(1):6-11. |
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| 作者姓名： | 黄东 袁家林 沈浩 汪华 石学文 |
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| 作者单位： | 中国石油西南油气田公司勘探开发研究院,四川成都 610041,中国石化重庆石油公司,重庆长寿 401220,中国石油西南油气田公司勘探开发研究院,四川成都 610041,中国石油西南油气田公司勘探开发研究院,四川成都 610041,中国石油西南油气田公司勘探开发研究院,四川成都 610041 |
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| 摘 要： | 四川盆地雷口坡组大量钻井资料揭示中三叠统雷口坡组主要成盐期分别为雷三2期和雷四2期。岩性组合特征、沉积环境研究表明,在川中的平昌—南充—遂宁一带发育雷三2期浓缩盐膏质蒸发泻湖微相,在川中-川西地区的南部—盐亭—成都—邛崃地区发育雷四2期盐膏湖盆微相。两期盐岩差异主要表现是,雷三2期时,盆地处于频繁的海进、海退过程中,沉积环境变化较快,成盐环境相对开放,盐盆往往多次蒸发浓缩、补给、淡化,海水表现出接近或者达到盐岩沉积浓度,其间往往夹杂石膏和云质团块沉积。雷四2期时,四川盆地处于持续的海退蒸发期,蒸发量远远大于补给量,海水以蒸发浓缩为主,海水表现为超过石盐沉积浓度,沉积石盐中夹杂卤石,局部地区钾含量极高。
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| 关 键 词： | 雷三2期 雷四2期 沉积微相 盐岩成因 成盐环境 四川盆地 |
| 收稿时间： | 2013/11/1 0:00:00 |
| 修稿时间： | 2013/12/4 0:00:00 |
Triassic Leikoupo Formation of T2l3,T2l4 Salt Sedimentary Environment and Genesis Study in Sichuan Basin |
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| HUANG Dong,YUAN Jia-lin,SHEN Hao,WANG Hua and SHI Xue-wen.Triassic Leikoupo Formation of T2l3,T2l4 Salt Sedimentary Environment and Genesis Study in Sichuan Basin[J].Journal of Salt Lake Research,2014(1):6-11. |
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| Authors: | HUANG Dong YUAN Jia-lin SHEN Hao WANG Hua and SHI Xue-wen |
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| Institution: | Research Institute of Exploration and Development,Southwest Petroleum Company,Chengdu,610041, China,Chongqing Petroleum Branch,China Petroleum & Chemical,Changshou,401220,China,Research Institute of Exploration and Development,Southwest Petroleum Company,Chengdu,610041, China,Research Institute of Exploration and Development,Southwest Petroleum Company,Chengdu,610041, China and Research Institute of Exploration and Development,Southwest Petroleum Company,Chengdu,610041, China |
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| Abstract: | :The large number of drilling data from Leikoupo indicate that the period of the Leikoup salt is T2l32 and T2l42.The study of sedimentary environment of the lithologic features show that in Sichuan Pingchang-Nanchong-Suining area development T2l3 period of concentrated salt gypsumevaporite lagoon facies,and in Sichuan to Western Sichuan region of the Nanbu-Yanting-Chengdu-Qionglai area development T2l42salt lake facies,there are two major different periods of the salt lock:the T2l3 period, the basin is in frequent transgression, regression process, the sedimentary environment changes rapidly, salt forming environment is relatively open, often repeated evaporation salt basin, recharge, desalination, seawatershowed close to or reached the salt rocks concentration, which tend to be the mixture of gypsum and cloud matterclumps;the T2l42 period:Sichuan Basin is a regression evaporation duration, evaporation is far greater than the supply, sea water to evaporation, the water is more than halite deposition concentration, deposition of halite inclusions carnallite in localarea, high potassium content. |
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| Keywords: | :T2l32 period T2l42 period Sedimentary micro facies Causes of salt rock The salt forming environment Sichuan basin |
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