稠油油藏水驱转热采工艺可行性分析  

Feasibility analysis of thermal recovery technology after waterflooding to heavy oil reservoirs

作　　者：杨斌[1] 沈静[2] 霍刚[2] 陈玉丽[2] 赵延茹[2] 

机构地区：[1]中国石油大学(华东)石油工程学院 [2]中国石化股份胜利油田分公司采油工艺研究院,山东东营257000

出　　处：《油气地质与采收率》2007年第4期103-105,共3页Petroleum Geology and Recovery Efficiency

摘　　要：胜利油区水驱稠油油藏经过多年的注水开发,由于原油粘度的增大和剩余油分布的高度分散,导致开发后期采油速度低、产量低,严重限制了油藏采收率的提高,因而必须寻找合适的接替技术。中外水驱转热采的实践经验证明,热采技术的高温蒸汽降粘和超覆作用等手段可大幅度提高水驱后稠油油藏的采收率,解决水驱开发无法解决的降低原油粘度和提高波及体积等问题。水驱转热采适合于埋藏深度小于1400m的普通稠油油藏,可大幅度提高原油采出程度。胜利油区的油藏条件完全符合水驱后转注蒸汽的筛选标准,具有广阔的应用前景。In Shengli Oilfield,heavy oil reservoirs,after many years of waterflooding,have low production rate and low producing capacity at later development stage due to the increase of oil viscosity and high-dispersing of remaining oil distribution.An appropriate replacing technology must be set to improve oil recovery of this kind of reservoirs.The application practice at home and abroad proves that viscosity-reducing and overriding effect of high-temperature steam in thermal recovery technology could considerably improve the recovery efficiency of oil reservoirs after water-flooding.That is,it can reduce the crude oil viscosity and increase the swept efficiency,which the waterflooding can not solve.The technology is fit for the ordinary heavy oil reservoirs with the buried depth less than 1 400m,which can highly increase the oil recovery factor.Reservoir conditions of Shengli Oilfield accord with the screening criterion of steam injection after waterflooding,therefore this technology is expected to get wide application.

关 键 词：水驱 普通稠油 热采 提高采收率 胜利油区 

分 类 号：TE357.7[石油与天然气工程—油气田开发工程]