四川盆地中三叠世盐盆分布与演化特征研究

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GS1 井就钻遇了这两期的盐岩。

Triassic Leikoupo Salt Distribution and Evolution in Sichuan Basin

Middle Triassic Leikoupo group is one of the earliest formations where nature gas and salt brine were exploitedin Sichuan Basin. The large number of drilling data from Leikoupo indicate that the period of the Leikoupo salt is T2l23 and T2l2 4,respectively. Eastern and southern basin due to the effect of palaeohigh,the ancient salt rock strata have been eroded andhard to conserve,today,the salt formation mainly exist in the Kaijiang palaeohigh and Luzhou west palaeohigh,as well asTianjing 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 migrationand superimposition. An examlpe of such feature is Well Gongshan 1 on the two phases of rock salt in middle Sichuan Basin.