裂缝性低渗透油藏等效连续介质模型  

Equivalent Continuous Medium Model for Fractured Low-Permeability Reservoir

作　　者：冯金德[1] 程林松[2] 李春兰[2] 柳良仁[3] 

机构地区：[1]中国石油勘探开发研究院,北京100083 [2]中国石油大学(北京)石油天然气工程学院 [3]长庆油田公司勘探开发研究院,陕西西安710021

出　　处：《石油钻探技术》2007年第5期94-97,共4页Petroleum Drilling Techniques

基　　金：国家自然科学基金项目"西部深层变形介质复杂油气非线性渗流模型"(编号:90210019);教育部高等学校博士学科点专项科研基金项目"裂缝性低渗透油藏非线性渗流模型"(编号:20060425001);教育部新世纪优秀人才支持计划项目"裂缝性特低渗透油藏非线性渗流理论与开发对策研究"(编号:NCET-05-0108)部分内容

摘　　要：为研究裂缝性油藏的渗流规律,国内外相关专家提出并建立了许多理论模型,但都有其局限性,且没有一个很好适合于裂缝性低渗透油藏的模型。为此,针对裂缝性低渗透油藏裂缝发育的特点,利用平行板理论、张量理论和等值渗流阻力原理建立了裂缝性低渗透油藏的等效连续介质模型,为定量评价天然裂缝对储层的影响、天然裂缝表征成果与裂缝性低渗透油藏的渗流理论和油藏工程研究的有机结合奠定了基础,并用实际油田的裂缝表征成果进行了应用分析。研究结果表明:天然裂缝对低渗透油藏,尤其是特低渗透油藏有很大影响,一方面显著提高了储层的渗透率,使油藏得以开发,另一方面加剧了储层的各向异性,增加了开发难度。For the purpose of investigating the fluid flow of fractured reservoir, a lot of theoretical models were provided worldwide, while no model is fit for the low permeability reservoir due to its limitation of the current model. Therefore, considering the development characteristics of low permeability fractured reservoir, an equivalent continuous medium model was developed based on parallel-plane theory, tensor theory and the law of equivalent seepage resistance. It provides the basis for evaluation the impact of naturally facture on pay zone, fractures characterization parameters and the seepage theory in low-permea- bility fractured reservoir. An actual reservoir＇s fracture characterizations parameters were analyzed. The results indicate that natural fractures have higher impacts on low-permeability reservoirs, especially in low permeability fractured reservoirs. The formation permeability is increased so that the reservoir can be developed, while the reservoir anisotropy is increased which increases the difficulty of reservoir development.

关 键 词：裂缝性油气藏 低渗透油气藏 连续介质 储集层模型 渗透率 数学模型 

分 类 号：TE348[石油与天然气工程—油气田开发工程]