Development and application of intelligent management system for fine drainage gas recovery
Most of the gas fields under the jurisdiction of Chongqing Gas District of PetroChina Southwest Oil and Gasfield Company are in production tail,with water producing gas wells occupying a large proportion.Especially,under the management modes of"large central station"and"oil company",the demands for fine drainage gas recovery cannot be met only relying on single conventional foam drainage gas recovery and manual intermittent well startup/shut-in,facing great challenges of fine management of old wells.There-fore,based on the researches on minimization of borehole pressure loss and intelligent management,depending on the existing Internet of Things,an intelligent management system has been developed,which integrates the functions of intelligent foam drainage gas re-covery,intelligent needle valve,and Big Data analysis of foam drainage gas recovery,and can realize stable liquid-carrying production of low-pressure and low-yield gas wells with foam drainage gas recovery,and maximize the uptime rate of intermittent gas production,to obtain sufficient productivity.The research and application results show that,(i)the system can intelligently analyze and make deci-sions based on real-time production data of gas wells,so as to reasonably determine the timing of well startup/shut-in;(ii)according to the calculations of borehole pressure loss and liquid loading,the system can intelligently push the injection volume and timing of foam agent,autonomously adjust the needle valve opening and optimize the wellbore flow state,enhance the liquid carrying capability of low-pressure water-producing gas wells,and achieve"three-stable"(relatively stable wellhead pressure,daily gas production,and wa-ter-gas ratio)production;and(iii)the system has been successfully applied in Well Tiandong 11 of the Wubaiti gasfield,achieving the significant cost reduction and efficiency improvement.The development and application of this intelligent management system have filled the gap of production technology in the region,and opened up a new technological approach of tapping potential and increasing production for old wells.
Water producing gas wellPotential tapping for old wellIntelligent foam drainage gas recoveryIntelligent needle valveFine drainage gas recoveryIntelligent management
万方数据
维普
