薄互层低渗透油藏压裂水平井产能研究

发布时间：2018-06-11 21:31

本文选题：薄互层低渗透油藏 + 压裂水平井　；参考：《西南石油大学》2017年硕士论文

【摘要】：薄互层低渗透油藏在新增储量中的比重越来越大,已成为中国石油工业增储上产的重要组成部分。针对薄互层低渗透油藏具有储层物性差、有效储集体分散的特点,国内外多采用压裂水平井进行开发,准确计算薄互层低渗透油藏压裂水平井产能对实现油田经济有效开发、制定油藏合理开发方案具有十分重要的意义。在大量调研压裂水平井产能研究文献资料基础上,本文系统性地研究了薄互层低渗透油藏压裂水平井稳态产能和非稳态产能的基础理论和计算方法,以及直井注水压裂水平井采油条件下的五点井网、反七点井网和反九点井网的产能及见水时间分析理论与方法,论文主要取得了以下研究成果:(1)建立了综合考虑启动压力梯度、应力敏感性、隔层影响、裂缝干扰作用和水平井井筒压降作用条件下的薄互层低渗透油藏压裂水平井稳态产能模型,利用MATLAB编程研究了不同因素对稳态产能的影响规律,研究确定了各因素对产能影响程度的次序;(2)基于稳态产能模型,并在获得了激动区边界移动规律的基础上,利用稳定状态逐次替换法,建立薄互层低渗透油藏压裂水平井非稳态产能模型,分析了压裂水平井非稳态产能特征,利用MATLAB编程研究了不同因素对非稳态产能的影响规律。在单因素影响规律分析基础上,对薄互层低渗透油藏压裂水平井非稳态产能进行了多因素正交优化设计分析,获得各个因素的影响次序和最优值;(3)通过对比分析直井与压裂水平井产能计算理论,获得了压裂水平井等效井径计算方法。结合井网渗流理论,获得了直井注水压裂水平井采油条件下的五点井网、反七点井网和反九点井网的产能及见水时间分析理论与方法。
[Abstract]:The proportion of thin interbed low permeability reservoirs in the new reserves is increasing, which has become an important part of increasing oil storage and production in China's petroleum industry. In view of the poor physical properties of thin interbed and low permeability reservoirs and the dispersion of effective reservoir mass, fracturing horizontal wells are often used for development at home and abroad, and accurate calculation of productivity of fracturing horizontal wells in thin interbed low permeability reservoirs can realize economic and effective development of oil fields. It is of great significance to formulate a reasonable reservoir development plan. On the basis of a great deal of research on the productivity of fracturing horizontal wells, this paper systematically studies the basic theory and calculation method of steady and unsteady productivity of fractured horizontal wells in thin interbed low permeability reservoirs. As well as the theory and method of productivity and water breakthrough time analysis of five-spot well pattern, anti-seven-spot well pattern and anti-nine-spot well pattern under the condition of horizontal well production by water injection fracturing in a straight well, the paper has mainly obtained the following research results: 1) established a comprehensive consideration of starting pressure gradient. The steady-state productivity model of fractured horizontal wells in thin interbedded low permeability reservoirs under the conditions of stress sensitivity, interlayer influence, fracture interference and horizontal wellbore pressure drop is studied by MATLAB programming. Based on the steady-state productivity model, and on the basis of the law of the boundary movement of the excited region, the steady state successive substitution method is used to determine the order of the influence of each factor on the productivity. The unsteady productivity model of fractured horizontal wells in thin interbed low permeability reservoir is established. The unsteady productivity characteristics of fractured horizontal wells are analyzed. The influence of different factors on unsteady productivity is studied by MATLAB programming. Based on the analysis of single factor influence law, the unsteady productivity of fractured horizontal well in thin interbed low permeability reservoir is analyzed by multi-factor orthogonal optimization design. By comparing and analyzing the productivity calculation theory of straight well and fracturing horizontal well, the equivalent diameter calculation method of fracturing horizontal well is obtained. Combining well pattern percolation theory, the theory and method of productivity analysis and water breakthrough time analysis of five-spot well pattern, anti-seven-spot well pattern and anti-nine-spot well pattern under the condition of water injection fracturing horizontal well production in straight well are obtained.
【学位授予单位】：西南石油大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TE328

【相似文献】