水平井开采延长油田底水油藏可行性分析

Feasibility Study of Horizontal Well Production in Bottom-water Reservoirs of Yanchang Oilfield

针对延长油田长2底水油藏的特点,研究了水平井开采底水油藏的渗流理论,建立并求解了相应的数学模型,得到了底水油藏水平井三维产能公式。实例验证结果表明三维产能公式的计算误差为3%,精度较高。对比分析了水平井与不完善直井的产能、底水突破时间。结果表明,水平井在抑制底水锥进方面优于不完善直井。水平井开采底水油藏渗流理论的研究对于开采同类油藏具有借鉴意义。

In allusion to characteristics of Chang 2bottom water reservoir in Yanchang Oilfield,the percolation theory of producing bottom-water reservoirs using horizontal well was studied and corresponding mathematical model was established and solved,a three-dimensional formula for obtaining productivity was derived.The result of example indicates that the error of three-dimensional formula is6%and it is high accuracy.The productivity and the time of bottom water breakthrough of the horizontal wells were contrasted with those of incomplete straight wells.The result indicates that the study of the percolation theory of producing bottom-water reservoirs using horizontal well provides reference for the production of similar reservoirs.