低渗透油藏水驱波及系数评价模型研究  

Researches of a Model of Waterflooding Sweep Efficiency Evaluation in Low Permeability Reservoirs

作　　者：马昌林[1,2] 刘慧峰[1,2] 李超[1,2] 张皎生[1,2] 刘萍[1,2] 隋成[1,2] 谭习群[1,2] 

机构地区：[1]中国石油长庆油田分公司勘探开发研究院 [2]低渗透油气田勘探开发国家工程实验室

出　　处：《低渗透油气田》2013年第3期59-62,共4页

摘　　要：低渗透油藏油井见水后采液、采油指数下降，含水快速上升，产量递减快，最终水驱波及系数低，导致采收率低．建立低渗透油藏的波及系数计算模型是科学评价低渗透油藏采收率的关键拳文应用油藏工程、物理模拟、数值模拟等多种方法．分析了影响低渗透油藏平面和纵向波及系数的主要因素，建立了低渗透油藏的波及系数计算模型，并在AS油田WY加密区长6油藏进行了验证，表明建立的模型实用性强、精度较高，能够满足现场生产需要。After water breakthrough in the oil wells of low permeability reservoirs,the fluid productivity index and oil productivity index come down.The moisture content rise rapidly,and the production devlines fast.The ultimate waterflood sweep efficiency is low.This results in low recovery factor.Establishment of a model of calculation of sweep efficiency in low-permeability reservoirs is the key to scientific evaluation of oil recovery factor of low permeability reservoirs.By application of various methods of reservoir engineering,physical simulation,and numerical simulation,the authors analyze the main factors influencing the vertical and plane sweep efficiencies in low permeability reservoirs and establish a computational model of sweep efficiency in low permeability reservoirs.The model was verified on the Chang6 reservoirs in Wangyao District of Ansai oilfiele.It indicates that the established model is of good practicability,with high precision,and can meet the needs of on-site production.

关 键 词：低渗透油藏 波及系数 计算模型 

分 类 号：TE348[石油与天然气工程—油气田开发工程]