注水开发气顶油藏水平井临界产量计算新方法
发布时间：2018-11-16 13:11
【摘要】：临界产量是确定气顶油藏合理开发的关键指标,但现有临界产量计算方法仅适用于衰竭开发的气顶油藏,注水开发气顶油藏水平井临界产量的计算方法尚属空白。利用水平井三维渗流场分解理论,将水平井的三维渗流场分解为外部渗流场和内部渗流场2个平面渗流场,在每个平面渗流场内根据径向流理论、流体静力学平衡关系计算临界产量,最终根据等值渗流阻力原理并结合油水相渗曲线,建立不同含水阶段注水开发气顶油藏水平井临界产量计算新方法。利用该方法指导BZ油田气顶油藏不同含水阶段、不同原油黏度油井工作制度调整,通过矿场实践,BZ油田气顶油藏整体控气稳油效果显著。气油比从150 m~3/m~3降至100 m~3/m~3,产油量无递减。该方法简单实用,具有一定推广价值。
[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.
【作者单位】： 中海石油(中国)有限公司天津分公司;
【基金】：国家科技重大专项“渤海油田加密调整及提高采收率油藏工程技术示范”(2016ZX05058001)
【分类号】：TE328
本文编号：2335605
[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.
【作者单位】： 中海石油(中国)有限公司天津分公司;
【基金】：国家科技重大专项“渤海油田加密调整及提高采收率油藏工程技术示范”(2016ZX05058001)
【分类号】：TE328
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