摘要
长庆油田三叠系特低渗透油藏的特点是各层启动压力梯度差异大,剖面非均质性严重,多段动用的注水井剖面矛盾较大,部分油层段得不到能量补充,注水效果差。对油藏多层开采区域采用悬压式分层注水措施后,油藏动态特征和动态监测结果表明,分注区域油藏开发形势明显好转,水驱储量动用程度得到提高,注水单向突进现象得到缓解,见效油井增多;地层能量上升,油井产量上升,区域产量上升;注水井吸水剖面得到改善;各小层吸水量趋于均匀,水驱变好;避免注入水沿单层突进,从而抑制了油井见水,取得了良好的经济效益,区块开发水平得到显著提高。
Triassic ultra-low permeability reservoir in Changqing Oilfield is characterized by starting pressure gradient difference in layers and serious profile heterogeneity. Part of reservoir energies can not be supplied and water injection efficiency is poor. After the zonal injection technology is applied with hanging-stratified injection pressure in multi-reservoir mining districts, water injection well profile is markedly improved. The producing reserves with water drive are improved and the oil production increases. The small amount of water layer tends to be uniform and water flooding effect becomes better. Water breakthrough in oil well is controlled. Development level is significantly improved with good economic return.
出处
《断块油气田》
CAS
2008年第2期110-112,共3页
Fault-Block Oil & Gas Field
关键词
三叠系油藏
分层注水
效果评价
Triassic oil reservoir, zonal injection, effect evaluation.
