深层气藏采收率计算及提高采收率对策研究

Searching the Ways of Calculating the Recovery Efficiency and Policys in Raising the Recovery Efficiency of Deep Layer Gas Reservoir

目前 ,国内外广泛用于预测气藏采收率的方法主要有物质平衡法、产量递减法、数值模拟法、经验取值法等 8种方法。由于白庙气田沙三3- 4 气藏埋藏深 ,构造复杂 ,储层物性差 ,井底积液 ,气藏采收率研究难度大 ,因此 ,研究气藏储气砂体的连通率和单井控制储量 ,选择适合气藏特点的一种或几种方法确定气藏采收率 ,使其更反映气藏实际。提出的深层气藏提高采收率的相应对策 。

There are many ways to calculate the recovery efficiency of gas reservoir. There are 8 ways most widely used in predicting recovery in the world. They are materials balance method , production decline method, numerical simulation method, empirical judgement method, etc. Because Baimiao gasfield Es 3-4 3 gas reservoirhave the characteistic of deep born, complex structure, bad physical prorerty and well bottom store liquid, etc. It's very difficult to determining its recovery efficiency. As a result, this paper studys the connectedness of the sand body and single well controll reserves. Choosen one or several ways to determine its recovery has been emphasized. The paper offers some suitable policy in raising the recovery efficiency to the deep layer gas reservoir. It may guide the production of the same kind of gas reservoir.