摘要
L油田纵向钻遇第三系、白垩系、侏罗系、三叠系油砂层,层垂向非均质性强,层间干扰严重,经过二十几年开发,综合含水91%,采出程度38%,油水井管外窜增加,剩余油分布复杂,稳产难度大。为缓解层间吸水差异,保持油层压力,提高注水波及系数,L油田采用分层注水工艺。针对超深高温高压特点,设计耐温耐压分注管柱,对油管、偏心配水器和封隔器在材质和结构上进行改进,在L油田实施14井次,分注井吸水剖面明显改善,井组增油效果显著。首次提出超深高温高压油藏分层注水井层位间距和夹层下限,对分注工艺推广具有一定指导意义。
Reservoir sands of Tertiary,Cretaceous,Jurassic and Triassic are drilled in L oilfield.After 20 years development,the composite water cut of L2 TI reservoir is 91%. Due to vertical heterogeneity and channeling effect,the remaining oil distribution is complex. To solve the problem,separated layer water flooding is used in development of the reservoir. In order to meet the requirements of high pressure high temperature,materials and structures of oil tubes,eccentric injection mandrel and excluder have been improved. The strategy of zonal injection has implied 14 times in L oilfield.Injection profiles have been improved and the production of oil well groups has increased significantly. Inferior boundary of horizon separation and interface layer in high pressure high temperature reservoirs is firstly imposed in this article,and this index play an important role in promoting the zonal injection technology.
出处
《承德石油高等专科学校学报》
CAS
2016年第3期7-11,42,共6页
Journal of Chengde Petroleum College
关键词
分层注水
夹层分布
超深高温高压
吸水剖面
separated layer water flooding
interlayer
ultra deep high pressure high temperature
water injection profile
