TYPES AND INFLUENCING FACTORS OF RESIDUAL OIL IN SHA-2 LOWER SUBMEMBER OIL POOL IN PUCHENG OILFIELD

Xia Baohua; Zhou Zhuoming; Sun Xuexia; Zhao Lianjie; Zhang Hui

doi:10.11743/ogg20010422

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TYPES AND INFLUENCING FACTORS OF RESIDUAL OIL IN SHA-2 LOWER SUBMEMBER OIL POOL IN PUCHENG OILFIELD
Vol. 22, Issue 4, Pages: 385-387(2001)
Online First：25 December 2001，

Published：2001
DOI： 10.11743/ogg20010422
稿件说明：

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DOI：

Xia Baohua, Zhou Zhuoming, Sun Xuexia, et al. TYPES AND INFLUENCING FACTORS OF RESIDUAL OIL IN SHA-2 LOWER SUBMEMBER OIL POOL IN PUCHENG OILFIELD[J]. 2001, 22(4): 385-387. DOI： 10.11743/ogg20010422.

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20年开发

目前含水高达92.%.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46

14等大断层的上升盘

可通过布定向井进行开发.

Abstract

After nearly 20 years of production

the water cut of the oil pool in the lower Sha 2 submember is up to 92.3%.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

25 and 14 faults

and could be recovered by directional well allocation.