摘要
为开展水合物钻采过程中储层稳定性研究,研制水合物储层层内加固改造模拟试验装置,包括储层模拟系统、拔管系统、压裂注浆模拟系统、固化改造评价系统以及试验气体回收系统.为验证试验系统性能,利用石英砂和甲烷气模拟水合物储层,开展水合物储层层内加固改造模拟试验.结果表明:试验系统能够稳定地模拟水合物储层,层内加固改造试验验证了水合物储层压裂-注浆固化改造的可行性;利用该设备可以开展水合物开发过程中的压裂、层内加固改造、不同温压条件下的水合物试采或钻遇性水合物层固井过程中的水合物稳定性等模拟研究.
Abstract
In order to carry out research on reservoir stability during hydrate drilling and production,an experimental device for reinforcement and reconstruction of hydrate-bearing formation was developed,including a reservoir simulation system,a tubing pulling system,a fracturing and grouting simulation system,a solidification and reconstruction evaluation system,and an experimental gas recovery system.To verify the performance of the device,a simulation experiment was conducted using quartz sands and methane gas to simulate the hydrate-bearing formation.The feasibility of fracturing and grouting solidifica-tion transformation of hydrate layers was verified by the experiments of reinforcement and transformation within the layers.The results show that the device can be used to conduct simulation studies of different process during hydrate drilling and pro-duction,such as fracturing,formation reinforcement and reconstruction,hydrate production test under different temperature and pressure conditions,and hydrate stability in cementing,which can provide important guidelines for long-term and safe production of hydrate reservoirs,as well as safe cementing construction in drilling through hydrate layers.
基金项目
中国石油天然气集团重大科技项目(ZD2019-184-003)
中国石油集团科技项目(2021DJ4902)
国家科技期刊平台
NSTL
万方数据