摘要
针对低渗透油藏开发过程中普遍存在的问题,选取长庆油田特低渗透油藏为研究对象,通过对该区块菱形反九点注采井网的调整,进行了井网转换和井网加密可行性研究,并提出相应的最优转换时机。研究结果表明:菱形反九点注采井网转为交错排状后,增大了波及系数,提高了水驱动用程度,改善了地层压力场,提高了同期采出程度,其最优转换时机为含水率75%;对菱形反九点注采井网有针对性地采取中心加密,加密井采取先采后注的策略,可提高区块采油速度和最终采收率,且生产2年为加密井最优转注时机;所研究油藏最优的调整方案为2007年进行加密,并于2009年对加密井进行转注。对同类油气藏中后期调整提供了技术指导。
Aimed at the proplems exsiting in the process of the low permeabile reservoir production, the feasibility and the best adjustment moment of rhombus nine-spot well pattern transformation and infilling are studied with a Changqing oilfield′s block with the ubiquitous problems in low permeability oilfield development. The results show: with rhombus nine-spot well pattern transformed to cross row well pattern, development is obviously improved and the opportune moment is at the moment of water content 75%; With center infilling well converted after 2 years in rhombus nine-spot well pattern, the oil production rate and recovery are improved; the best time for infilling to convert to injecting is after 2 years′ production. The optimal scheme for involved block is high oil remaining location infilled in 2007 and infilled well converted in 2009. The findings provide the technical reference for middle and later period adjustment of similar reservoirs.
出处
《西南石油大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2007年第4期67-69,共3页
Journal of Southwest Petroleum University(Science & Technology Edition)
基金
国家自然科学基金项目重大研究计划(90210019)。
关键词
低渗透
井网转换
加密
转注
转换时机
low permeability
well pattern transformation
infilling well
conversion well
opportune adjustment moment
