东濮凹陷低渗透油藏二氧化碳驱先导试验  

Pilot test on CO_(2)flooding of low permeability oil reservoir in Dongpu sag

作　　者：孙同英 SUN Tongying(Pucheng Oil Production Plant,SINOPEC Zhongyuan Oilfield Company,Puyang Henan 457001,China)

机构地区：[1]中国石化中原油田分公司濮城采油厂,河南濮阳457001

出　　处：《石油化工应用》2021年第4期28-30,35,共4页Petrochemical Industry Application

基　　金：中国石化集团公司科研项目“提高深层低渗油藏CO2驱油效果技术研究”,项目编号:P17003-6。

摘　　要：东濮凹陷低渗油藏储量丰富,注水驱油开发效果欠佳,亟需新的驱油技术降本增效。在对低渗油藏卫42块开展油藏研究和模拟试验的基础上,优化设计气驱注采比和注气量,在卫42块实施气驱先导试验,对比分析了注CO_(2)前后地层压力、CO_(2)驱油效果和CO_(2)泄漏监测情况。结果表明:低渗油藏卫42块注CO_(2)驱油有较好的效果,地层压力回升,但是受储层裂缝影响发生气窜。该区块的气驱试验为东濮凹陷其他低渗油藏下步气驱开发提供重要的参考价值。In Dongpu sag,there are abundant reserves in low-permeability oil reservoirs,but their water flooding effects are not satisfactory.Therefore,it is in urgent need to develop a new flooding technology for cost reducing and efficiency increasing.In view of the characteristics and on the basis of the simulation experiments in Wei 42 fault-block which is a low permeability reservoir of Pucheng oilfield,gas injection flooding is applied.We optimized gas-drive injection-production ratio and injected gas volume.Compared the formation pressure before and after gas injection,flooding effectiveness and monitoring information of CO_(2) gas leaking.The results show that the effect of CO_(2) gas drive in Wei 42 fault-block is good,and the formation pressure rises.But gas channeling occurs under the influence of reservoir fractures.The gas flooding experiment provides important reference value for the next gas flooding development of other low permeability reservoirs in Dongpu sag.

关 键 词：东濮凹陷 濮城油田 低渗油藏 CO_(2)驱 

分 类 号：TE357.45[石油与天然气工程—油气田开发工程]