Development And Application Of Integrated Unit Of Well Group In Sulige Gas Field

Sulige gas field is located in the Inner Mongolia Maowusu Desert,is typical of low permeability and low pressure and low abundance lithologic gas reservoirs with "three low",the single well production of the gas field,low pressure attenuation,pressure according to the current system,when the wellhead pressure drops to below 1.0MPa,will not be able to enter the downstream gas gathering station;if less than 0.5 MPa,as well shut down idle or intermittent production,recoverable reserves could not obtain maximum utilization,resulting in a waste of resources.The aim of this project is generally well group integration device developed for Sulige gas field of single well production characteristics,improve the single well gas pressure,improve the single well production,centralized treatment after the separation of the sewage,and realize the unit skid integration,rapid installation and migration.This project mainly includes the research contents: how to improve the wellhead pressure,increase production of single well and adapt to harsh environment;compression device and driving unit of machine selection;wellhead device used on produced water treatment scheme,realize the centralized processing;research how to realize the integration of skid compression units and ancillary equipment mounting structure.Well group integrated device of the design including natural gas engine,compressor,slug flow processing system,separation system,control system,exhaust system,oil lubrication system,cooling system,control system,power distribution box and all necessary auxiliary equipment.Well group integrated device after the installation is complete,select the typical wells in Sulige gas field were evaluated by field test,for more than 72 hours of continuous operation of the main unit safety assessment,without exception,to control the normal work of the system,the slug normal acquisition of natural gas emissions,no abnormal leakage,the unit has reached the conditions required to achieve the wellhead supercharging integration,effectively reduces the production cost,improve the gas production and the development of China's energy security and machinery manufacturing industry has important significance.