影响特低渗透油藏单井产量递减率的因素及程度研究  

Study on influencing factors and degree of single well yield decline rate of ultra-low permeability reservoir

作　　者：高超[1] 杨满平[1] 王刚[2] 杜少恩[1] 张淑婷[1] 

机构地区：[1]燕山大学石油工程系,河北秦皇岛066004 [2]中国石油大庆油田有限责任公司第八采油厂,黑龙江大庆163514

出　　处：《复杂油气藏》2012年第1期47-50,54,共5页Complex Hydrocarbon Reservoirs

基　　金：国家自然科学基金项目"非均质油藏不稳定注水机理及参数优化设计研究"(编号:50804041)

摘　　要：特低渗透油藏由于物性条件差,单井产量低,稳产期短,甚至没有稳产期直接进入递减期。从单井产量递减率的定义出发,推导出影响单井产量递减率因素的方程,同时结合长庆油田S392区长6特低渗油藏的矿场生产资料,运用正交试验方法分析各因素对单井产量递减率的影响程度。研究结果表明:影响特低渗透油藏单井产量递减率的因素主要有油层有效出油厚度、有效生产压差、单井生产时间、油水流度和、含水率、供给半径等;在这些因素中影响程度最大的是油水流度和,其影响程度为47.54%,其次是含水率和油层有效厚度,分别为17.83%和10.14%。Because of poor physical property of ultra-low permeability reservoir,there is lower single well production,shorter stable production period,and directly entering decline period even without stable production period.According to the definition of single well production decline rate,an equation,which includes factors of influencing decline rate for single well production,is derived.Combining with production data of Chang 6 ultra-low permeability reservoir of S392 area in Changqing Oilfield,the influencing degree of various factors on single well production decline rate is analyzed by the orthogonal test method.The results show that the influencing factors consist of effective thickness,effective production pressure difference,the single well production time,the sum of oil and water mobility,water cut,and supply radius.The first one is the sum of oil and water mobility,which contributes to a 47.54% of the influencing degree.The second one is water cut and effective thickness,which contribute to 17.83% and 10.14% of the influencing degree,respectively.

关 键 词：特低渗透油藏 递减率 单井产量 影响因素 影响程度 减缓措施 

分 类 号：TE313.8[石油与天然气工程—油气田开发工程]