摘要
为解决固井二界面胶结评价无法在高温高压下一体化模拟滤饼形成、冲洗与胶结过程,以及测试环境温湿度变化导致胶结强度测试值失准的问题,研制了水泥环二界面胶结强度原位测试装置,并提出了相应的测试方法。该装置实现了高温高压下模拟地层滤饼形成、冲洗和水泥环二界面胶结形成与胶结强度原位测试全过程的一体化,测量精度达0.001 MPa,解决了因温湿度变化引起滤饼干裂而导致胶结强度测试结果偏小的问题。测试结果表明:胶结强度随着地层压力和岩心渗透率增大而增大,不同钻井液体系的材料组分对胶结强度的影响显著,膨胀水泥浆体系能够有效提高水泥环二界面胶结强度。通过研制该装置及建立配套评价方法,实现了对固井界面胶结质量的准确测定与胶结性能的优化。
To address the challenges of evaluating cementing second interface bonding,specifically,the inability to integrally simulate the processes of mudcake formation,flushing,and bonding under high-temperature and highpressure conditions,as well as measurement inaccuracies in bonding strength caused by variations in ambient temperature and humidity,a device for in-situ testing of cement sheath’s second interface bonding strength was developed,along with a corresponding testing methodology.This device enabled the integral simulation of the entire process,including simulated formation filter cake formation,flushing,cement sheath’s second interface bonding formation,and in-situ bonding strength testing under high-temperature and high-pressure conditions.With a measurement accuracy of 0.001 MPa,it resolved the issue of underestimated bonding strength results caused by filter cake drying and cracking due to temperature and humidity fluctuations.Test results demonstrate that bonding strength increases with rising formation pressure and core permeability;the material composition of different drilling fluid systems significantly influences bonding strength,and expansive cement slurry systems effectively enhance the cement sheath’s second interface bonding strength.The development of this device and the establishment of a supporting evaluation method enable accurate determination of cementing interface bonding quality and optimization of bonding performance.
作者
袁彬
罗伟强
徐璧华
王金忠
杨燕
YUAN Bin;LUO Weiqiang;XU Bihua;WANG Jinzhong;YANG Yan(State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation(Southwest Petroleum University),Chengdu,Sichuan,610500,China;Gas Storage Construction Project Department,PetroChina Jidong Oilfield Company,Tangshan,Hebei,063004,China;Oil Production Technology Research Institute,PetroChina Jidong Oilfield Company,Tangshan,Hebei,063004,China)
出处
《石油钻探技术》
北大核心
2025年第6期127-133,共7页
Petroleum Drilling Techniques
基金
国家自然科学基金项目“CCUS地质封存井磷铝酸盐水泥固井提高水泥环耐碳化腐蚀机理研究”(编号:52204014)
四川省青年基金项目“废弃高温气藏注超临界CO_(2)开采地热井水泥环劣化机理及控制研究”(编号:2023NSFSC0926)联合资助。
关键词
水泥环
二界面
胶结强度
高温高压
滤饼
冲洗
cement sheath
second interface
bond strength
high-temperature and high-pressure
filter cake
flushing
