塔河油田奥陶系油田水特征离子及意义

塔河油田奥陶系油田水的可溶物质主要成分与海水一致,表明其主要为海相成因.油田水中不同的离子组成、浓度及离子参数指示特定的地质意义:塔河7号区块与其他区块处于不同的水文系统;塔河油田奥陶系碳酸盐岩层中存在着大量的粘土矿物和胶结物,造成溶液具有相对高钙和低钠现象;钠氯系数、碳酸盐平衡系数、脱硫系数等在井间分布具有一定的规律性,总体上从南东向北西方向变化,反映了油气从满加尔坳陷向塔北地区运移的趋势.

CHARACTERISTIC IONS OF ORDOVICIAN OIL FIELD WATER IN TAHE OILFIELD AND ITS SIGNIFICATIONS

The principal compositions of soluble materials of the Ordovician oil field water in Tahe oilfield are consistent with sea water, suggesting its marine origin. The different ionic compositions, concentration and ionic parameter indicate different geological features. No.7 area of Tahe oilfield is in a different hydrology system from others. There are abundant clay minerals and cements in the Ordovician carbonate reservoir, resulting in relatively high concentration of calcium and low concentration of natrium in the solution. The ratio of natrium and chlorine, carbonate equilibrium ratios and the ratios of desulphurization have a change pattern from southeast to northwest, indicating that petroleum was migrated from Manjiaer to Northern Tarim Basin.