摘要
濮城油田沙河街组二段下亚段 (简称沙二下 )油藏经历了近 2 0年开发 ,目前含水高达 92 3%。因此 ,须探讨高含水情况下剩余油的分布规律 ,以调整开发方案。濮城油田剩余油分布主要受构造、沉积相及井网密度的影响 ,可分为 3种分布型式 :(1)连片分布差油层型。该类型的剩余油主要分布于各小层的河道间相 (Q)和远砂坝砂坪相 (Y) ,须进行油层改造后 ,方可动用。 (2 )注采不完善型。此类型的剩余油主要分布于沙二下 6～ 8砂层 ,在现有工艺条件下 ,暂不宜开发。 (3)断层遮挡型。这种类型的剩余油主要分布于濮 4 6 ,4 9,2 5 ,14等大断层的上升盘 ,可通过布定向井进行开发。
After nearly 20 years of production,the water cut of the oil pool in the lower Sha 2 submember is up to 92.30/0.The distribution of residual oil is influenced basically by structures,sedimentary facies and well density,and could be divided into 3 types:(1)discontinuous oil layers.This type of residual oil is mainly distributed in interchannel facies(Q),distal bar and sand flat facies(Y).The oil layers should be reformed before recovery;(2)incompleted injection recovery type.This type of residual oil is mainly distriuted in the 6th～8th sandbodies of lower Sha 2 submember,and it is not suitable for recovery at present;(3)fault sheltered type.This type of residual oil is distributed in the upper walls of Pu 46, 49, 25 and 14 faults,and could be recovered by directional well allocation.
出处
《石油与天然气地质》
EI
CAS
CSCD
北大核心
2001年第4期385-387,共3页
Oil & Gas Geology
关键词
剩余油
类型
分布
濮城油田开发
residual oil
type
distribution
exploration
Pucheng Oilfield
