带气顶油藏气顶油环协同开发适应性研究——以A南油(气)藏为例  

Adaptability of gas cap oil ring collaborative development in gas cap reservoir

作　　者：谷悦 GU Yue(Shenzhen Company of CNOOC(China)Co.,Ltd.,Shenzhen 518000,Guangdong,China)

机构地区：[1]中海石油(中国)有限公司深圳分公司,广东深圳518000

出　　处：《石油地质与工程》2024年第2期93-96,101,共5页Petroleum Geology and Engineering

摘　　要：带气顶油藏主要依靠气顶膨胀能量开采油环,油井生产使油环压力降低容易发生气窜,造成油气资源损失。考虑合理开采气顶,并实现油气协同开发,运用油藏数值模拟方法进行了相关开发适应性研究。基于正交实验分析,影响带气顶油藏开发效果的主控因素为气顶指数、凝析油含量、地层厚度、地层倾角、垂直渗透率与水平渗透率的比值;通过对不同地质条件下不同开发方式进行全面数值模拟试验,分析各地层参数对带气顶油藏开发效果的影响规律。结果表明:随着气顶指数增加,合理开发方式由衰竭开发逐渐变为注水开发,且气顶指数增大,开发方式逐渐由面积注水转为屏障注水;高凝析油、高倾角厚层油藏宜采用注水开发方式。Gas cap reservoirs mainly rely on the expansion energy of the gas cap to extract the oil ring.The production of oil wells reduces the pressure of the oil ring and is easy to gas channeling,resulting in the loss of oil and gas resources.Considering reasonable exploitation of gas cap and realizing collaborative development of oil and gas,relevant development adaptability was conducted by using reservoir numerical simulation methods.Based on orthogonal experimental analysis,the main controlling factors affecting the development effect of gas cap reservoirs are gas cap index,condensate oil content,formation thickness,formation dip angle,and the ratio of vertical permeability to horizontal permeability.Through numerical simulation tests of different development methods under different geological conditions,the influence of various layer parameters on the development of gas cap reservoirs is analyzed.The results show that with the increase of gas cap index,the reasonable development mode gradually changes from depletion to water injection,and the development mode gradually changes from area water injection to barrier water injection with the increase of gas cap index.High condensate oil and high dip thickness reservoir should be developed by water injection.

关 键 词：气顶油环 屏障注水 保压开采 凝析油 协同开发 

分 类 号：TE319[石油与天然气工程—油气田开发工程]