注水開發(fā)氣頂油藏水平井臨界產量計算新方法
[Abstract]:Critical production rate is the key index to determine the reasonable development of gas cap reservoir, but the existing critical production calculation method is only suitable for gas cap reservoir developed in exhaustion, and the calculation method of critical production of horizontal well in gas cap reservoir developed by water injection is still blank. Using the theory of three-dimensional seepage field decomposition of horizontal well, the three-dimensional seepage field of horizontal well is decomposed into two plane seepage fields: external seepage field and internal seepage field. The radial flow theory is used in each plane seepage field. According to the principle of equivalent percolation resistance and the oil-water phase permeability curve, a new method for calculating critical production of horizontal wells in gas-cap reservoirs developed by water injection in different water cut stages is established. This method is used to guide the adjustment of the working rules of different oil wells with different water cut stages and different viscosity of crude oil in the gas cap reservoir of BZ oilfield. Through field practice, the effect of overall gas control and oil stabilization in the gas cap reservoir of BZ oilfield is remarkable. The ratio of gas to oil decreased from 150 m~3/m~3 to 100mg / mm3, and the oil production did not decrease. This method is simple and practical and has certain popularization value.
【作者單位】: 中海石油(中國)有限公司天津分公司;
【基金】:國家科技重大專項“渤海油田加密調整及提高采收率油藏工程技術示范”(2016ZX05058001)
【分類號】:TE328
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