摘要
国内盐穴储气库造腔层段岩性复杂,不同深度存在不同厚度的夹层,夹层厚度从1 m至10 m以上,造腔结果相差较大。以金坛储气库8口造腔井为例,通过造腔参数分析,研究不同夹层处理工艺下的造腔效果,总结出多夹层盐岩段造腔工艺技术方案：使油水界面在夹层上部且距离夹层至少3-4 m;当油水界面在夹层下部时,控制油垫厚度小于0.1 m且腔顶直径不要太大;当前阶段油水界面位于夹层下部且腔体需要扩容时,将油水界面调整至夹层上部;当处理腔体下部夹层时,使内管位于夹层下部,至少在夹层位置。上述技术方案可为其他盐穴储气库建设提供参考和技术支持。
In China,the cavity building interval for salt cavern gas storage often features complicated lithology,and interlayers with varying thickness（from 1 m to 10 m or more） exist at different depths,leading to distinct results of cavity building result.Taking the 8 cavity building wells of Jintan Gas Storage as an example,through analyzing the cavity building parameters,and studying the cavity building effect under different interlayer treatment process,the cavity building solution for multi-interbedded salt rock is proposed：（1） the OWC is kept at least 3-4 m above the interlayer;（2） when the OWC is under the interlayer,the oil cushion thickness is controlled less than 0.1 m and cavern roof diameter should not be too big;（3） when the OWC is under the interlayer and the cavern needs to be expanded,the OWC is adjusted above the interlayer;and（4） when the interlayer beneath the cavern is treated,the inner pipe should be located under the interlayer or at least at the interlayer position.The solution can provide a reference and technical support for other salt cavern gas storage building.
出处
《油气储运》
CAS
北大核心
2015年第2期162-166,共5页
Oil & Gas Storage and Transportation
基金
中国石油天然气股份有限公司科技攻关项目"金坛盐穴地下储气库采卤造腔工程水处理及现场应用研究"
K2011-31
关键词
盐穴储气库
夹层溶蚀
油垫厚度
油水界面
salt cavern gas storage
interlayer dissolution
oil cushion thickness
OWC
