页岩凝析气井生产数据分析新方法

徐兵祥

doi:10.11764/j.issn.1672-1926.2016.05.0905

天然气地球科学 >

2016 , Vol. 27 >Issue 5: 905 - 909

DOI: https://doi.org/10.11764/j.issn.1672-1926.2016.05.0905

天然气开发

页岩凝析气井生产数据分析新方法

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中海油研究总院新能源研究中心，北京 100028

徐兵祥(1985-)，男，安徽望江人，工程师，博士，主要从事页岩气、煤层气等非常规油气开发研究. E-mail:xubingxiang8526@163.com.

收稿日期: 2015-06-09

修回日期: 2015-08-04

网络出版日期: 2019-09-20

基金资助

中海石油（中国）有限公司科技项目（编号：YXKY-2016-ZY-03）;能源行业页岩气标准化技术委员会2015年标准研究项目(编号:页研-2015020007)资助.

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New production data analysis technique for gas condensate well in shale reservoirs

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New Energy Research Center,CNOOC Research Institute，Beijing 100028,China

Received date: 2015-06-09

Revised date: 2015-08-04

Online published: 2019-09-20

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摘要

生产数据分析方法在页岩气动态分析中应用广泛，常作为储层及裂缝参数反演、产量预测的重要技术手段。目前该方法多用于分析页岩干气情况，仅适用于单相流，对于凝析气来说，地层会出现油气两相流导致方法不适用。基于此，从油气两相渗流方程出发，兼顾页岩气和凝析气特点，建立页岩凝析气井两相拟压力、拟时间解析模型，给出该类井特征曲线分析方法和流程，该方法经数值模型验证可提高裂缝长度计算精度，减小误差22%。提出的方法同样适用于页岩挥发油井，此时分析对象变成产油量，模型参数做略微调整即可。

关键词： 页岩; 凝析气井; 生产数据分析; 线性流; 拟压力; 拟时间

本文引用格式

徐兵祥 . 页岩凝析气井生产数据分析新方法[J]. 天然气地球科学, 2016 , 27(5) : 905 -909 . DOI: 10.11764/j.issn.1672-1926.2016.05.0905

Abstract

Production data analysis technique (PDA) is commonly used in shale gas reservoir as an effective tool to estimate the reservoir parameters and predict production.Presently this technique is usually applied in dry gas shale reservoir since it is only applicable to single-phase flow cases.For shale gas condensate reservoir,two-phase flow occurs and exists in formation when the pressure is below the dew point pressure,making the present PDA technique not applicable in these cases.Based on this,an analytical model with two-phase pseudo-pressure and pseudo-time for shale gas condensate wells was derived from the fundamental oil-gas two-phase flow equations,accounting for the characteristics of both shale gas and gas condensate.The new analysis approach and procedure of specialized plot were presented and validated by numerical simulation.It is more accurate than the previous method and can reduce the error by 22% in current case.This technique is also useful forshale volatile oil wells by changing several parameters in analytical model.And the analysis object becomes oil rate rather than gas rate.

Key words： Shale; Gas condensate well; Production data analysis; Linear flow; Pseudo-pressure; Pseudo-time

参考文献

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