低渗透油藏压裂井产量递减规律分析

梁利平，蔡明金,贾永禄

doi:10.11764/j.issn.1672-1926.2012.04.770

天然气地球科学 >

2012 , Vol. 23 >Issue 4: 770 - 774

DOI: https://doi.org/10.11764/j.issn.1672-1926.2012.04.770

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低渗透油藏压裂井产量递减规律分析

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1.西南石油大学石油工程学院，四川成都 610500；2.中国石油长庆油田输油处，陕西西安710018；
3.西南石油大学国家重点实验室，四川成都 610500；4.中国石油塔里木油田博士后科研工作站,新疆库尔勒 841000

梁利平（1973-），男，陕西西安人，工程师，博士，主要从事低渗透油气田油藏工程研究工作. E-mail：htcnpc@126.com.

收稿日期: 2012-03-05

修回日期: 2012-04-14

网络出版日期: 2012-08-10

基金资助

国家科技重大专项项目（编号：2008ZX05013）资助.

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Rate Decline Law for Vertical Fracture Wells in Low Permeability Reservoir

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1.School of Petroleum Engineering, Southwest Petroleum University, Chengdu 610500,China;
2.Division of Oil Delivery, Changqing Oilfield Company, Xi′an 710018, China;
3.State Key Laboratory of Completion Center of Southwest Petroleum University,Chendu 610500, China;
4.Post Doctoral Mobile Station of Tarim Oilfield Company, Korla 841000,China

Received date: 2012-03-05

Revised date: 2012-04-14

Online published: 2012-08-10

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摘要

针对低渗透油藏水力压裂后形成的有限导流垂直裂缝，建立了考虑启动压力梯度低渗透油藏垂直裂缝井产量递减分析数学模型，并进行了求解，绘制了相应典型曲线，分析了曲线特征，并对参数敏感性进行了分析，同时分析了启动压力梯度对实例井产能的影响。研究表明，存在启动压力梯度低渗透油藏有限导流垂直裂缝井产量比不存在启动压力梯度时递减更快，这种差别在生产中后期尤为显著。实例分析表明，启动压力梯度对低渗透油藏压裂后产能影响较大，不应被忽略。

关键词： 低渗透; 启动压力梯度; 垂直裂缝; 有限导流; 产量递减

本文引用格式

梁利平，蔡明金,贾永禄 . 低渗透油藏压裂井产量递减规律分析[J]. 天然气地球科学, 2012 , 23(4) : 770 -774 . DOI: 10.11764/j.issn.1672-1926.2012.04.770

Abstract

Since the finite conductivity vertical fractures in the low permeability reservoirs will be formed after fracture treatment of well, we setup the rate decline mathematical model in consideration with threshold pressure gradient and draw the rate decline type curves of fractured well after calculation.We discuss the tendency of curve change.We also illustrate the influence of threshold pressure gradient on productivity of example well in the low permeability reservoirs.The results show that the production decrease rate for the finite conductivity vertical fractures wells in the threshold pressure gradient reservoir is faster than that of ordinary reservoirs, and this difference is especially significant in the middle or later stage of production.The case indicates that the influence of threshold pressure gradient should not be ignored when rate decline for the finite conductivity vertical fractures well in the low permeability reservoirs.

Key words： Low permeability; Threshold pressure gradient; Vertical fracture; Finite conductivity; Rate decline

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