摘要
草桥油田馆陶组底部的砂砾岩稠油层是一种特殊储集类型的热采油层。砂砾岩储层属于“复模态”结构,既有砾石又有充填物,既有砾间孔隙又有充填物内孔隙,其中充填物的成分和含量是决定砾岩储层含油性、物性的主要因素。按其差异又可将储层进一步划分为砾岩、含砾砂岩以及砂岩三类,它们的分布与沉积相带密切相关,具有一定规律性。注蒸汽吞吐开采砂砾岩稠油油层,初期产能高,递减率大,周期生产时间相对较短,且不同岩性储层热采效果有所不同,其吞吐周期内含水变化和采油过程符合一般弹性开采类型的热采规律。
The sandy conglomeratic heavy oil reservoir at the bottom of Guantao fo- rmation,Caoqiao oil field is a thermal production reservoir which is a parti- cular type of reservoir,The conglometeratic reservoir has a“double moldic” structure containing,both intergravel pores and inner-filling pores.Composi- tion and content of the filling materials are the major factors controlling the oil properties.The reservoir is derided into three typet,i.e.conglomerate, conglomeratic sandy and sandy reservoir.Their distributions correlate closely with the depositional facies and have certain regularity. When the reservoir is recovered by steam soak,the oil production is high at the initial period,but declines very fast,so the production cycle is short. Production characteristics are different for different types of reservoirs.The water in the steam soak cycle and oilproduction period are characterized by an elastic drive energy produced recovery.For a single well,there is no ste- ady period in steam soak.Frequent interwell and interblock production tran- sform are the major forms for steady oil production.This is most important for the steady oil production by thermal production,for improvement of the recovery of reserves.
出处
《石油勘探与开发》
SCIE
EI
CAS
CSCD
北大核心
1992年第4期79-84,共6页
Petroleum Exploration and Development
