THE GEOLOGICAL CHARACTERISTICS OF QIANMIQIAO BURIED HILL CONDENSATED POOL
千米桥潜山凝析气藏地质特征

This paper is focused on the geological characteristics of Qianmiqiao buried hill condensated reservoir. It's a composite reservoir formed mainly by saturated one with middle-high condensate. It's a residual mountain(unaka) which were a set of thrust blocks under the erosion unconformity. It's reservoir pore space is a fracture-vug-pore system of Ordovician carbonate karst. The fluid distribute like layer in Fengfeng formation and up-Majiagou formation in top of Ordovician. This reservoir has high temperature and normal pressure. There are nether active edge water nor bottom water in it which is in confining hydrogeological environment, so it's pressure depletion drived. The hydrocarbon in it is derived from saprohumic organic matter in mature to post-mature phase from northen Shasan member in Banqiao sag of Huanghua depression.