油水相对渗透率曲线非线性优化校正新方法及其应用

doi:10.11743/ogg20130317

石油与天然气地质 ›› 2013, Vol. 34 ›› Issue (3): 394-399.doi: 10.11743/ogg20130317

油水相对渗透率曲线非线性优化校正新方法及其应用

杨超¹, 李彦兰¹, 徐兵祥², 赵庆兵³

1. 中国石油勘探开发研究院, 北京 100083;
2. 中海油研究总院, 北京 100027;
3. 中国石化西北石油局, 新疆乌鲁木齐 830011

收稿日期:2012-04-28 修回日期:2013-05-15 出版日期:2013-06-28 发布日期:2013-07-17
第一作者简介:杨超(1986- ),男,博士研究生,油气田开发和油藏数值模拟。E-mail:yangchao2010phd@163.com。
基金项目:
国家科技重大专项"大型油气田及煤层气开发"(2011ZX05010-002)。

New nonlinear correction method of oil-water relative permeability curves and their application

Yang Chao¹, Li Yanlan¹, Xu Bingxiang², Zhao Qingbing³

1. PetroChina Research Institute of Petroleum Exploration & Development, Beijing 100083, China;
2. CNOOC Research Institute, Beijing 100027, China;
3. SINOPEC Northwest Oilfield Company, Urumqi, Xinjiang 830011, China

Received:2012-04-28 Revised:2013-05-15 Online:2013-06-28 Published:2013-07-17

摘要/Abstract

摘要： 实验室测得的相对渗透率曲线仅代表了井点取心段的流动特征,往往与实际生产特征不符,需要在数值模拟历史拟合阶段进行校正,该过程繁琐且耗时耗力。文中提出了一种利用非线性优化理论校正相对渗透率曲线的方法。该方法假定油水相对渗透率呈广泛使用的指数函数关系,通过理论计算与实际含水-采出曲线进行拟合,确定相对渗透率曲线关系式。该方法需要参数少,计算方便、速度快。通过吐哈油田温西3区块历史拟合后的相对渗透率曲线验证,校正后的相对渗透率曲线与历史拟合相对渗透率曲线更吻合,表明校正方法是可行的。校正后的相对渗透率曲线具有较好的代表性,形态良好,克服了曲线上凸。通过新的油水相对渗透曲线计算的理论含水率-采出程度曲线与实际曲线拟合较好,符合实际生产的需要,具有一定的理论和应用价值。

关键词: 约束条件, 历史拟合, 非线性优化, 含水率, 采出程度, 油水相对渗透率

Abstract: The relative permeability curves from laboratory measurement only represent the flow behavious of core sample and commonly do not accord with the real flow behaviors,thus they need to be corrected through history matching.However,the process of history matching is time-consuming and labor-intensive.The current study introduces a new method to correct the relative permeability curves based on the nonlinear optimization theory and accurate experimental endpoint.Based on the assumption that the relative permeability satisfies the exponential function,the theoretical water cut-recovery curve (f_w-R) is fitted to the actual fw-R curve to obtain relative permeability curves.The new method requires fewer parameters and is simple and faster.Application of the new method to Turpan-Hami Oilfield WENXI 3 block shows that the the corrected relative permeability curves fit better with the calculated relative permeability through history matching,indicating this correction method is feasible.The corrected relative permeability curves are representative and in good shape.The theoretical water cut-recovery curves obtained by using the new method are in good accordance with the real curves.

Key words: constraint, history matching, nonlinear optimization, water cut, oil recovery, oil-water relative permeability

中图分类号:

TE312

杨超,李彦兰,徐兵祥,等. 油水相对渗透率曲线非线性优化校正新方法及其应用[J]. 石油与天然气地质, 2013, 34(3): 394-399. doi: 10.11743/ogg20130317 Yang Chao,Li Yanlan,Xu Bingxiang,et al. New nonlinear correction method of oil-water relative permeability curves and their application[J]. Oil & Gas Geology, 2013, 34(3): 394-399. doi: 10.11743/ogg20130317

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油水相对渗透率曲线非线性优化校正新方法及其应用

New nonlinear correction method of oil-water relative permeability curves and their application

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