裂缝水窜气藏单井数值模拟研究

RESEARCH ON INDIVIDUAL WELL NUMERICAL SIMULATION OF FRACTURE WATER BREA KTHROUGH GAS RESERVOIR

活跃水侵气藏均表现为裂缝水窜的特征。在这些气藏中水的活跃程度往往取决于裂缝的发育程度 ,特别是大裂缝的发育程度。本文研究了裂缝水窜气藏单井数值模拟技术问题。应用单井模拟技术 ,研究和分析了裂缝水窜气藏气井开采机理。模拟试验表明 :裂缝是底水活动的主要通道 ;裂缝—孔洞型底水活跃水侵气藏早期气水界面以下层段排水是提高气藏采收率的有效途径 ;对于水淹气井 。

All the water invasion gas reservoirs are manife sted as the characteristics of fracture water breakthrough.In these gas reservoi rs,the degree of water activity is always dependent upon that of fracture growin g,especially upon that of macrofracture growing.In the paper,some technical prob lems with the individual well numerical simulation of fracture water breakthroug h gas reservoir are studied and the producing mechanism of gas wells in the frac ture water breakthrough gas reservoir is analyzed by applying the individual we ll numerical simulation technique.Through simulation testing,it is shown that th e fractures are the main pathways of bottom water activity;the drainage of the i nterval u nder early gas water interface of fracture cavity gas reservoir with active bo tt om water invasion is an effective way of enhancing gas reservoir recovery;and th e drainage gas recovery is the optimal method of enhancing recovery for the wate red gas wells.