复合解堵技术在天然气水合物开发中的应用可行性分析

Application feasibility of composite plugging removal technology in the development of natural gas hydrate

不同物质如地层颗粒、微生物、注入物等在流固运移、滞留过程中,会造成油气井的堵塞,本文对堵塞区域进行划分,分为地面集输管线堵塞、井筒堵塞、挡砂介质堵塞及地层孔道堵塞4类。阐述造成堵塞的物理、化学、生物等因素及堵塞特征。梳理现阶段海洋油气资源开发过程中常用的解堵工艺技术现状,将解堵技术分为物理、化学、生物、复合4类。同时分析认为复合解堵技术在未来应用于天然气水合物开发中的可能性最大,为今后海域天然气水合物资源开发中解堵技术提供参考。

Different substances,such as formation particles,microorganisms and injections,will cause blockage of oil and gas wells in the process of migration and retention along with pipeline fluid and solid.This paper divides the blockage areas into four categories:blockage of surface collection and transmission pipelines,blockage of wellbore,blockage of sand control media and blockage of formation pores.The physical,chemical and biological factors causing plugging and plugging characteristics are analyzed in this paper.The present status of plugging removal technology commonly used in the process of offshore oil and gas resource development is summarized,and the plugging removal technology is divided into four categories,namely physical,chemical,biological and composite.At the same time,it is considered that the composite plugging removal technology is the most likely to be applied to hydrate development in the future,which provides a reference for the plugging removal technology in the future development of marine natural gas hydrate resources.