华北地区海相碳酸盐岩岩溶与油气富集

MARINE CARBONATITE KARST AND ENRICHMENT OF OIL AND GAS IN NORTH CHINA AREA

华北地区下古生界海相碳酸盐岩由于长期受地质构造运动的影响,产生褶皱及断裂,地表和地下水沿断层面、地层不整合面或因褶皱而产生的岩石破碎面向下淋滤、渗透、溶蚀,从而形成了各种各样的古岩溶形态。勘探实践证明:华北海相碳酸盐岩古岩溶是石油和天然气非常好的储集空间。

As the effect of the longtime tectonical movements upon it, lifted and failed obviously, the marine carbonatite in North China area were formed into folds and faults. Groundwater moves along the unconformities or the face of faults and folding cracks, down ward leaching and corrosion in fissures and pores of the rocks have made the formation of different kinds of palaeokarst after a considerable period of time. The experience of prospection has proved that the marine carbonatite karst in the xecellent reservoir space for oil and gas.