页岩气地面工程标准化设计

页岩气藏的特殊物性决定了其地面工程建设必须采用非常规、标准化的技术手段,加之我国页岩气藏地面工程设计面临集输规模不确定性强、管网和站场布局适应性差、工艺设备配套难度大及后期需考虑增压开采等诸多难点,因此要求页岩气地面工程建设必须向"标准化设计、模块化建设、橇装化配备"的方向发展。为此,在文献调研和技术探索的基础上,形成了以"标准化井场布局、通用化工艺流程、模块化功能分区、橇装化设备选型、集约化场地设计、数字化生产管理"为核心的页岩气地面工程标准化设计技术;并以国内川渝地区典型页岩气田为例,讨论其应用背景和地面工艺技术路线,对地面集输系统进行标准化设计,包括标准化工艺流程、模块化集输站场、系列化脱水装置、集约化平面布置,取得了显著的效果。建立了灵活、实用、可靠的地面生产体系,完成了丛式井平台、集气站、配套工程等一系列标准化工艺及模块的设计,形成了一套适应于国内页岩气田地面工程建设的技术体系。

Standardized surface engineering design of shale gas reservoirs

Due to the special physical properties of shale gas reservoirs, it is necessary to adopt unconventional and standardized technologies for its surface engineering construction. In addition, the surface engineering design of shale gas reservoirs in China faces many difficulties, such as high uncertainty of the gathering and transportation scale, poor adaptability of pipe network and station layout, difficult matching of the process equipments, and boosting production at the late stage. In view of these problems, the surface engineering construction of shale gas reservoirs should follow the principles of “standardized design, modularized construction and skid mounted equipment”. In this paper, standardized surface engineering design technologies for shale gas reservoirs were developed with the “standardized well station layout, universal process, modular function zoning, skid mounted equipment selection, intensive site design, digitized production management” as the core, after literature analysis and technology exploration were carried out. Then its application background and surface technology route were discussed with a typical shale gas field in Sichuan-Chongqing area as an example. Its surface gathering system was designed in a standardized way, including standardized process, the modularized gathering and transportation station, serialized dehydration unit and intensive layout, and remarkable effects were achieved. A flexible, practical and reliable ground production system was built, and a series of standardized technology and modularized design were completed, including cluster well platform, set station, supporting projects. In this way, a system applicable to domestic shale gas surface engineering construction is developed.