油气储层的深岩溶作用

DEEP KARSTIFICATION OF GAS-OIL RESERVOIR

碳酸盐岩和砂岩是重要的油气储层，埋藏期深岩溶作用形成的次生孔隙是油气运移和聚集的有效空间。笔者通过多个油田研究，总结了深岩溶发育特征，并且首次运用多种有机酸对碳酸盐岩和砂岩溶孔的形成进行了模拟试验研究，揭示了有机溶蚀化学机理和深溶作用的温度。

Carbonate rocks and sandstones are important gas oil reservoirs. The secondary pore space caused by the deep karstification during buried period is the effective space of gas oil migration and accumulation. In this paper the development characters of deep karst are summarized on the basis of the studies of several gas oil fields. The simulation test of the formation of the secondary corrosion void in carbonate rocks and sandstones is firstly made by using varied organic acids, which reveals the chemical mechanism of organic corrosion and the temperature pressure effect of the deep karstification.