天然气开发

低渗油气藏水力压裂理想水驱波及范围预测新方法

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  • 1.北京大学地球与空间科学学院,北京 100871; 2.北京大学石油与天然气研究中心,北京 100871
杜书恒(1994-),男,安徽定远人,博士研究生,主要从事低渗油气藏开发地质研究. E-mail:dushuheng@pku.edu.cn.

收稿日期: 2015-01-19

  修回日期: 2015-04-28

  网络出版日期: 2015-10-10

基金资助

国家重点基础研究发展计划(编号:2009CB219300)资助.

New Forecasting Method on Ideal Water Flooding Swept Volume after Hydraulic Fracturing in Low Permeability Oil & Gas Reservoir

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  • 1.School of Earth and Space Science,Peking University,Beijing 100871,China;
    2.Oil and Gas Institute,Peking University,Beijing 100871,China

Received date: 2015-01-19

  Revised date: 2015-04-28

  Online published: 2015-10-10

摘要

低渗难采油气藏大多生产井、注水井措施效果差,根本原因在于储层间未建立起有效驱动体系,从而导致剩余油气采出程度低。基于注水开发过程中水力压裂水驱波及范围判别精度不足的实际,在精细油气藏地质建模的基础上,结合储层岩样岩石力学实验,对松辽盆地某油气田单井井筒周围0°~360°范围内可能产生的压裂缝开展定量化预测,提出一种水力压裂后理想情况下水驱波及范围计算的新方法和水驱D指数曲线的概念,对现有技术条件下压裂后水驱波及可达到的理想范围进行了预测。这将为注水开发中后期储层改造,提高剩余油气采出程度提供较为重要的科学依据。

本文引用格式

杜书恒,师永民 . 低渗油气藏水力压裂理想水驱波及范围预测新方法[J]. 天然气地球科学, 2015 , 26(10) : 1956 -1962 . DOI: 10.11764/j.issn.1672-1926.2015.10.1956

Abstract

Most production and injection wells in low permeability oil & gas reservoir have poor effect of measure,in which is due to the fact that these reservoirs have not established effective driving system,resulting in a low degree of rest oil and gas production.Due to the insufficient forecasting accuracy on ideal water flooding swept volume after hydraulic fracturing in the process of flooding development,on the basis of fine geological modeling of reservoir,combined with rock mechanics experiment of reservoir rock sample,we choose an injection well with low permeability in the Songliao Basin to carry out a quantitative forecasting of fracture in the range of 0°-360° around the wellbore which may produce fracture,finally put forward a new method to calculate the ideal water flooding extent after hydraulic fracturing and the concept called “water flooding D coefficient curve”,forecasting the ideal water flooding scale concept under contemporary technology.This will provide an important scientific basis for reservoir stimulation in the mid and late period of water flooding development and improve the residual oil and gas recovery degree.

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