四川盆地中三叠世盐盆分布与演化特征研究
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摘要
四川盆地卤水分布广泛,资源丰富,早为世人所瞩目,中三叠统雷口坡组是四川盆地最早开采天然气和盐卤的层系之一。根据盆地雷口坡组大量钻井资料研究表明,盆地雷口坡组主要成盐期分别为雷三~2期和雷四~2期,在盆地东部和南部由于受到古隆起的影响,盐岩地层已被剥蚀难以保存,现今盐岩主要分布在开江古隆起和泸州古隆起的西部以及天井山古隆起的南部(华蓥山以西—龙门山以东的川西—川中地区)。印支运动对盆地雷口坡组盐岩在平面的迁移起着十分重要的作用,根据不同时期盐岩统计数据看,两期盐盆在平面上具有向西迁移、叠加的特征,其中川中的GSl井就钻遇了这两期的盐岩。
Middle Triassic Leikoupo group is one of the earliest formations where nature gas and salt brine were exploited in Sichuan Basin.The large number of drilling data from Leikoupo indicate that the period of the Leikoupo salt is T_2l+3~2 and T_2l_4~2,respectively.Eastern and southern basin due to the effect of palaeohigh,the ancient salt rock strata have been eroded and hard to conserve,today,the salt formation mainly exist in the Kaijiang palaeohigh and Luzhou west palaeohigh,as well as Tianjing mountain.Indo-Chinese movement plays an important role in the horizontal migration of salt rock of Leikoupo group. According to statistical data of rock salt in different periods,two salt basins in the plane display a feature of westward migration and superimposition.An examlpe of such feature is Well Gongshan 1 on the two phases of rock salt in middle Sichuan Basin.
Middle Triassic Leikoupo group is one of the earliest formations where nature gas and salt brine were exploited in Sichuan Basin.The large number of drilling data from Leikoupo indicate that the period of the Leikoupo salt is T_2l+3~2 and T_2l_4~2,respectively.Eastern and southern basin due to the effect of palaeohigh,the ancient salt rock strata have been eroded and hard to conserve,today,the salt formation mainly exist in the Kaijiang palaeohigh and Luzhou west palaeohigh,as well as Tianjing mountain.Indo-Chinese movement plays an important role in the horizontal migration of salt rock of Leikoupo group. According to statistical data of rock salt in different periods,two salt basins in the plane display a feature of westward migration and superimposition.An examlpe of such feature is Well Gongshan 1 on the two phases of rock salt in middle Sichuan Basin.
引文
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[2]冯增昭.中国南方早中三叠世岩相古地理[M].北京:石油工业出版社,1997.
[3]黄东,张健,杨光,等.四川盆地中三叠统雷口坡组地层划分探讨[J].西南石油大学学报:自然科学版, 2011,33(3):89-95. Huang Dong,Zhang Jian,Yang Guang,et al.Stratigraphic division of the Sichuan Basin in the Triassic Leikoupo group[J].Southwest Petroleum University:Natural Science,2011,33(3):89-95.
[4]林耀庭,何金权,叶茂才,等.论四川盆地下中三叠统成盐模式及找钾方向[J].化工矿产地质,2003,25(2): 76-81. Lin Yaoting,He Jinquan,Ye Maocai,et al.On potashforming model and ore-hunting direction of lower-middle triassic series in Sichuan Basin[J].Geology of Chemical Minerals,2003,25(2):76-81.
[5]林良彪,陈洪德,张长俊,等.四川盆地西北部中三叠世雷口坡期岩相古地理[J].沉积与特提斯地质,2007, 27(3):51-58. Lin Liangbiao,Chen Hongde,Zhang Changjun,et al. Sedimentary facies and palaeogeography of northwestern Sichuan Basin during the Leikoupoan(Middle Triassic) [J].Sedimentary and Tethyan Geology,2007,27(3): 51-58.
[6]雷卞军,周跃宗,杨金利,等.川中—川南过渡带嘉陵江组二段沉积相及其展布特征[J].中国地质,2006, 33(5):1149-1158. Lei Bianjun,Zhou Yuezong,Yang Jinli,et al.Sedimentary facies of the Second Member of the Jialingjiang Formation in the central-southern Sichuan transition zone and its distribution characteristics[J].China Geological, 2006,33(5):1149-1158.
[7]曾德铭,王兴志,张帆,等.四川盆地西北部中三叠统雷口坡组储层研究[J].古地理学报,2007,9(3): 253-266. Zeng Deming,Wang Xingzhi,Zhang Fan,et al.Study on reservoir of the Leikoupo Formation of Middle Triassic in northwestern Sichuan Basin[J].Journal of Palaeogeography, 2007,9(3):253-266.
[8]黄思静,杨俊杰,张文正,等.石膏对白云岩溶解影响的试验模拟研究[J].沉积学报,1996,14(1):103-108. Huang Sijing,Yang Junjie,Zhang Wenzheng,et al.Effects of gypsum on dissolution of dolomite under diferent temperatures and pressures of epigenesis and burial diagenesis [J].Acta Sedimentologica Sinica,1996,14(1): 103-108.
[9]汪华,刘树根,王国芝,等.川中南部地区中三叠统雷口坡组顶部古岩溶储层研究[J].物探化探计算技术, 2009,31(3):264-270. Wang Hua,Liu Shugen,Wang Guozhi,et al.Palaeoarst reservoir research of the middle triassic Leikoupo in the south area of central Sichuan Basin[J].Geophysical and Geochemical Exploration of Computing Technology, 2009,31(3):264-270.
[10]Goldhammer R K,Dun D A.Depositional cycles,composite sea-level changes,cycles stacking patterns,and the hierarchy of stratigraphic forcing:example from Alpine Triassic platform carbonates in northern Italy[J].GSA Bull.,1990,102:535-562.
[11]Hofmann A.Shallowing upward carbonate cycles in the Belingwe greestone belt,Zimbabwe:a record of Archean sea level oscillations[J].Sedim Research,2004,71(12): 64-81.
[12]James N P,Kendall,A C.Introduction to carbonate and evaporatefacies models[J].Geologic Association,Canada, 1992.
[13]Jean-Jacques C,Jean-pauls M,CONESA G,et al. Geometry,palaeoenvironments and relative sea level (accommodation space) changes in the Messinian Murdjtdjo carbonate platform(Orau,western Algeria): consequences[J].Sedimentary Geology,1994,89: 143-158.
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