摘要
以珠江口盆地陆丰凹陷内LFG13和LFG22两个老油田为例,从断层"屋檐"效应及砂体"内嵌"夹层的遮挡效应、高含水期的生产压差难以启动厚层块状砂体顶部低渗部位的流动、储层非均质性以及局部区域井网控制程度4个方面对块状砂岩油藏剩余油分布规律进行了研究,并从水驱后成"屋檐油"、生产压差难递进区、"包夹"型砂体组合上下包裹区以及井网未完善区4类剩余油富集区的动用阐述了块状砂岩油藏特高含水期剩余油挖潜的措施及效果。
Two oil fields of LFG13 and LFG22 in Lufeng Depression of Pearl River Mouth Basin were taken as examples in this paper. The study on the remaining oil distribution in the reservoir from massive sandstone has been conducted from four aspects: the barrier effect of both fault eaves and the embedded impermeable zone, hard inflowing from low permeable zone at the top of massive sandstone due to the demand of ultra high startup pressure drawdown, the formation heterogeneity and local well-pattern poor controlling. The corresponding strategy and method for developing the remaining oil gathering area of such type are eaves oil, pressure drawdown hardly transmitting area, the sandwich upper and lower part of sand composite layer and well-patter poorly controlling area.
出处
《石油天然气学报》
CAS
CSCD
北大核心
2009年第3期115-118,共4页
Journal of Oil and Gas Technology
