摘要
埕岛油田进入中高含水期后,由于采油速度低、单井控制储量大、层间干扰严重、日产液量低、井网不完善等问题,制约了该油田的高速高效开发。为此,进行了综合调整对策研究。结果表明,细分开发层系可以有效减少层间干扰,充分发挥油层产能,提高油层利用程度;井网加密调整可以提高储量控制程度,实现油水井均衡驱替;实施油井提液可以释放非主力油层能量,提高单井产能;应用水平井可以实现局部储层发育较单一或底部水淹较严重储层的有效动用,提高采油速度。从调整前后的对比情况来看,调整后采液强度增大到调整前的2.9倍,采油强度增大到调整前的1.5倍,注采对应率提高了20.5%,水驱控制程度提高了16.6%,已提液井日产液量增幅达80%以上,应用水平井后增产效果明显,同期累积产油量为定向井的1.6倍。
During the medium or high water cut stage in Chengdao offshore oilfield,some problems appear such as low oil extraction rate,great controlled reserves per well,serious interference between layers,low liquid quantity per day,incomplete well pattern and so on,which all restrict the exploitation of the oilfield.A study concluded that subdividing series of strata can effectively decrease the interference between layers,fully enhance oil production capacity and improve the use of oil.Infilling well pattern can enhance the degree of controlled reserves and achieve a balanced drive from water to oil wells.Improving liquid quantity can release energy of non-major reservoirs and improve individual well productivity.Through the application of horizontal wells over a single local or bottom flooding reservoir,we can effectively develop the reservoir and improve oil recovery rate.At present,the adjustment measure has been applied.After adjustment,the liquid and oil intensity is increased 2.9 and 1.5 times higher than before,and the injector-producer correspondence is improved by 20.5%,and the water flooding control level is also improved by 16.6%.Moreover,the liquid enhancement is improved over 80% in some wells with liquid enhancement measurement,and the application of horizontal wells significantly increases the productivity.In general,the adjustment effect is remarkable.
出处
《油气地质与采收率》
CAS
CSCD
北大核心
2011年第6期90-93,117,共4页
Petroleum Geology and Recovery Efficiency
关键词
中高含水期
综合调整
层系
井网
提液
水平井
埕岛油田
medium to high water cut development
comprehensive adjustment
series of strata
well pattern
liquid enhancement
horizontal well
Chengdao offshore oilfield
