??????????????????????????????

四川与鄂尔多斯盆地同属多旋回克拉通盆地,沉积史相似,因此用前者的碳酸盐岩储层模式类比于后者,有助于对气田的早期评价。经对比认为,鄂尔多斯盆地有形成多种碳酸盐岩储层类型的地质基础,目前发现的奥陶系储层,属古风化壳膏溶类型,具形成大气田的储层条件,但其非均质性绝不可忽视。

Viewing on the Carbonate Reservoirs in Eerduosi Basin from the Situation of Sichuan Basin

Sichuan Basin and Eerduosi Basin both belong in the multicycle craton basins,having the same sedimentary history. Therefore the application of the carbonate reservoir modes of the former to the latter contributes to the early evaluation of the gas fields. Through contrasting, it is considered that Eerduosi Basin has the geological bases to form multi-type carbonate reservoirs and the Ordovician reservoir found at present belongs in the gypsum-dissolved type in the paleo-weathered crust,having reservoir conditions to form large gas field,but the heterogeneity may not be ignored absolutely.