特低渗透油藏建立有效注采系统实验研究  

Experimental study on the establishment of effective injection-production system in ultra-low permeability reservoir

作　　者：薛成国[1,2] 杨正明[2] 刘学伟[2] 徐轩[1,2] 齐亚东[1,2] 王炳科[3] 

机构地区：[1]中国科学院渗流流体力学研究所,河北廊坊065007 [2]中国石油勘探开发研究院廊坊分院,河北廊坊065007 [3]胜利石油管理局河口采油厂作业大队,山东东营257200

出　　处：《西安石油大学学报（自然科学版）》2011年第3期48-51,8-9,共4页Journal of Xi’an Shiyou University（Natural Science Edition）

基　　金：国家重大油气专项"特低渗透油藏有效补充能量技术研究"子课题(编号:2008ZX05000-013-02)

摘　　要：为了进一步研究特低渗透油藏有效注采系统建立的规律及其影响因素,从理论上推导了特低渗透油藏建立有效注采系统的判别模型.应用研制的特低渗透二维平板模型模拟了五点法1/4单元井网,并进行了注采系统有效性的实验研究.结果表明:注采井网要建立有效注采系统,必须克服一定的启动压差;实验得到的启动压差值与理论计算模型得到的计算值基本吻合;渗透率越大,注采井距越小,注采井间启动压差越小,有效注采系统越容易建立.因此,对于特低渗透油藏,通过压裂酸化等手段改造油藏物性或者适当减小井距会使注采井间的启动压差降低,从而更加容易建立起有效注采系统.It is difficult to establish an effective injection-production system in ultra-low permeability reservoir.In order to study the law and the influencing factors of establishing the effective injection-production,a model for judging weather to establish an effective injection-production in ultra-low permeability reservoir or not is obtained,and the experimental study on effective injection-production is carried out by means of a self-developed 2D plane model for simulating 1/4 unit of a five point pattern.The study results show that,a definite starting displacing pressure difference is necessary for the establishment of an effective injection-production system in ultra-low permeability reservoir,and the starting displacing pressure difference determined by experiments is consistent to that obtained according to the theoretical model established in this paper,which shows that the experimental is correct.It is also shown that,the greater the reservoir permeability and the less the distance between production wells and water injection wells,the less the starting displacing pressure difference and the easier the establishment of an effective injection-production system.Therefore,improving reservoir property by fracturing and acidizing or reducing the distance between production wells and water injection wells can make the establishment of an effective injection-production system easier.

关 键 词：特低渗透油藏 注采系统 启动压差 启动压力梯度 实验研究 

分 类 号：TE312[石油与天然气工程—油气田开发工程]