A novel method for predicting gas/oil flow rate from temperature log data

A novel method for predicting gas/oil flow rate from temperature log data
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一种根据温度测井数据预测油气流量的新方法

DOI:
10.1016/j.petrol.2015.04.022
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发表时间:
2015-09
影响因子:
--
通讯作者:
Wei-Jie Yu
Wei-Jie Yu
中科院分区:
工程技术2区
文献类型:
--
作者:
Wen-Long Cheng;Bing-Bing Han;You-Quan Li;Wei-Jie Yu

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生产井的气/油流量是评价油田产量的重要参数。提出了一种基于生产井温度-流量模型的有效的温度测井流量反演方法。为此,首先建立了考虑井筒热容的生产井传热模型,得到了温度-流量模型。在此基础上,利用灵敏度分析方法研究了流量与流体温度之间的相关性。最后,利用该反演方法对三口生产威尔斯井的流量和导热系数进行了反演,研究了全井反演方法与单点反演方法的差异。结果分析表明,全井筒法估算流量的相对误差小于10%,而单点法估算流量在井筒中点处的相对误差较小。此外,估计的流体温度也符合良好的温度测井数据。
Gas/oil flow rate of production well is an important parameter for evaluating oilfield production. This study presents an effective inversion method for estimating the flow rate from temperature log data, and the proposed method is based on the temperature-flow rate model of production well. Therefore, a novel heat transfer model for production well with consideration of wellbore heat capacity is built first to obtain the temperature-flow rate model. Then sensitivity analysis is applied to investigation of the correlation between the flow rate and fluid temperature for the inversion method. Lastly, the inversion method is used to estimate the flow rate as well as thermal conductivity of three production wells with study on the difference between the entire-wellbore and single-point inversion method. Analyses of results show that the entire-wellbore method tends to be more accurate to estimate flow rate with relative error less than 10%, while the single-point method shows lower error at the middle-points of wellbore for flow rate estimation. Furthermore, the estimated fluid temperature also agrees well with the temperature log data.
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