关键词: 模拟, 地质类比法, 古潜山, 碳酸盐岩, 溶洞, 裂缝, 溶解作用

Abstract: To make feld analogy investigation is very helpful to oilfield geologic studies. The authors explained the relationship between the two and how combined with each other following participating in field analogy investigation of buried hill carbonate reservoir in Jizhong area of Renqiu oilfield. This approach has been employed to determine the sequences of Middle -Upper Proterozoic and Paleozoic within the field, guide studies of distribution of faults and fractures and make clear about distribution of northeast fault in the buried hill structures. The developed buried hill karst is characterized by the druses and vugs along beddings, large-scale denudation fracture and vugs along faults, which become the main channels for fluid migration. The horizontal karst zones developed near phreatic level form three horizontal leached belts in Renqiu buried hill. According to study of the reservoir porosity distribution by analogy approach, it is indicated that fracture-vug-pore type,solution cavity-fracture type and porotoid type are the major types of Jizhong petroleum reservoirs.

Key words: Simulation, Geologic analogy method, Buried hill, Carbonate rock, Cave, Fracture, Solution