THE STUDY OF PRODUCTION MECHANISM USING NUMERICAL SIMULATION IN QIANMIQIAO BURIED HILL CONDENSTED GAS RESERVOIR
千米桥潜山凝析气藏数值模拟开采机理研究

Qianmiqiao buried hill condensated gas reservoir in Dagang oil field, eastern China, was an important discovery at the end of 1998's exploration. The oil and gas production was high at the beginning stage, but production rate and formation pressure dropped down quickly accompanied with GOR and water cut increasing rapidly. These appearances fully reflect that Qianmiqiao buried hill condensate gas reservoir is very complicated. The single-well model was made using numerical simulation on the basis of fluid phase behavior evaluating. In accordance with questions during the reservoir production, such rules are studied as reservoir production rate decline, GOR, WGR and so on, and at the same time the percolation flow relationship between matrix and fracture is also studied. Numerical simulation shows that gas production rate shouldn't too high and bottom water cone shouldn't form in the early stage. Fracture system play an important role in the whole production. Percolation flow action is very faint between matrix and fracture. The conclusion has some guiding significance to planning and deployment of Qianmiqiao buried hill in the future.