Abstract:

The low cost,safe and efficient disposal of gas field produced water has become the main factor restricting the stable production of natural gas in China. It is of great significance to solve the problem of treatment and disposal of gas field produced water to ensure national energy security. Therefore,based on a brief review of the current situation of water production in major gas fields in four major onshore petroliferous basins in China, the key challenges faced by the treatment and disposal of produced water from gas fields in China were analyzed, and countermeasures and suggestions for the treatment and disposal of gas field produced water were proposed. The research results show that most of the gas fields distributed in the Ordos Basin, Tarim Basin, Sichuan Basin and Qaidam Basin in China are facing the situation of simultaneous production of gas and water and the sharp increase of water production. Under the strategic goal of “double carbon”, key challenges include the increasing amount of water on the produced surface of gas fields, the lack of national level reinjection management systems and standards, the high cost of meeting surface discharge standards and limited application areas, and the early stage of comprehensive resource utilization. It is necessary to strengthen the research on the overall water control of gas reservoirs, improve the reinjection management and technical standard system of gas field produced water at the national level, promote the low-cost comprehensive resource utilization of gas field produced water, and expand the new path of gas field produced water disposal. The conclusions indicate that the gas reservoirs in China are diverse, and the geological, geomorphological, hydrological and climatic conditions are complex and changeable. It is necessary to promote the reinjection disposal, surface discharge and comprehensive utilization of produced water from gas fields according to local conditions, so as to support the realization of the strategic objectives of “stabilizing oil and increasing gas” and “double carbon” in China.

Key words: gas field produced water, reinjection, stabilize oil and increasing gas, groundwater environmental protection, comprehensive utilization, carbon dioxide geological storage

摘要：

气田采出水的低成本安全高效处置已成为制约我国天然气稳产增产的主要因素，解决气田开发水处置难题对保障国家能源安全具有重要意义。基于对我国陆上四大含油气盆地中主要气田产水现状的梳理，分析了我国气田采出水处置面临的关键挑战，提出了解决气田采出水处置难题的对策建议。研究表明，分布于我国鄂尔多斯盆地、塔里木盆地、四川盆地以及柴达木盆地的气田多数面临气水同采、产水激增的状况。“双碳”战略目标下，气田采出水面临产水量逐年增加、国家层面回注管理制度与标准规范缺失、地表达标外排成本高且适用地区有限、综合资源化利用尚处起步阶段等关键挑战。需加强气藏整体治水研究，健全国家层面气田采出水回注管理与技术标准体系，推进气田采出水低成本综合资源化利用，拓展气田采出水处置新路径。我国气藏类型多样，地质地貌水文气候条件复杂多变，需因地制宜推进气田采出水的回注处置、达标外排与综合资源化利用，多措并举支撑我国“稳油增气”与“双碳”战略目标实现。

关键词: 气田采出水, 回注, 稳油增气, 地下水环境保护, 综合资源化, CO₂地质封存

CLC Number: 

• TE992.2