矩形气藏的产量递减规律及动态预测方法
Dynamic production performance prediction and decline laws of rectangular gas reservoirs
查看参考文献7篇
文摘
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单井的生产动态预测通常分为定产降压和定压降产两个阶段,采用二项式产能方程和物质平衡方程对矩形低渗透气藏进行早期动态预测时,指标总是倾向乐观。针对该问题,将井位于矩形边界某一位置处的压力解与物质平衡方程相结合来预测定产降压阶段的井底流压、地层平均压力的变化,避开了产能方程的时效性问题;根据物质平衡方程和产能方程,建立了定压生产条件下的递减公式,并采用Wattenbarger定压形状因子进行定压降产阶段的动态预测,揭示了压力、产量随时间变化规律。实例计算结果表明:新建模型能够改善早期动态预测结果,各项指标接近生产实际。研究成果对于类似气藏合理有效开发方案的制订具有指导意义。 |
其他语种文摘
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Dynamic performance prediction for a single well usually consists of two stages:pressure drop at constant rate and production decline at constant pressure.The indicators are always inclined to be optimistic when the performance prediction for a rectangular low permeability reservoir is carried out by use of the laminar-inertial-turbulent (LIT)approach and the material balance equation in the early stage.In view of this,the pressure analytic solution of a well located beside the rectangular area is combined with the material balance equation to predict how the bottomhole flow pressure and the formation pressure change in the stage of pressure drop at constant rate,which helps avoid the time effectiveness of the LIT approach.Based on material balance equation and LIT equation,a formula is developed for the decline rate of production at-constant pressure.Moreover,the Wattenbarger shape factors are adopted to predict the dynamic behavior of the reservoir in the constant pressure stage and the change rules of production vs.time and pressure vs.time are also revealed.The results of a case study indicate that this new method can improve the dynamic prediction in the early stage and all indicators approach practical values.This study is of value in guidance to the program planning for the rational and efficient development of similar gas reservoirs. |
来源
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天然气工业
,2011,31(7):40-42 【核心库】
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DOI
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10.3787/j.issn.1000-0976.2011.07.010
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关键词
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矩形气藏
;
定容
;
物质平衡法
;
递减
;
规律
;
动态
;
预测
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地址
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1.
中国科学院力学所
2.
中国石油西南油气田公司川东北气矿
3.
中国石油塔里木油田公司勘探开发研究院
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语种
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中文 |
文献类型
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研究性论文 |
ISSN
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1000-0976 |
学科
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石油、天然气工业 |
文献收藏号
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CSCD:4260479
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