Carat Beautiful Field Ground Processing Process Improvement And Optimization

Kelameili gas reservoir is in deep volcanic formation which is characterized by sharp lateral variations of lithologies and rapid stress failing. The wellhead parameters are difficult to predict. The gas processing project injects ethylene glycol to protect hydrate and use throttling refrigeration for dehydration and de-hydrocarbon. The condensate process is flash stabilization process. After gas production, the gas field products have a great difference with the prediction, and the gas field processing system can not adapt the operating conditions. It is critical to launch process optimization studies on Kelameili gas field processing.HYSYS software is used to simulate the gas field process. Through the analysis of MEG injection process, the twice alcohol injection process is changed into once injection, the injection point is determined to be the pre-cooling tube sheet and the glycol injection amount is optimized. The MEG and condensate separation temperature is too low in Kelameili. It is thought that the separation temperature should be about50℃to improve the separation of MEG and condensate. The pressure of condensate stabilization is Reduced from850Kpa to450Kpa, the reduction of pressure can reduce the energy consumption and the bottom temperature of the condensate tower. The improvement of stable condensate heat transfer processes and rich gas recovery process could recover the condensate heat and reduce process energy consumption.The glycol regeneration process optimization study is carried out to resolve the problems in MEG regeneration system of Kelameili gas field. The fouling of column, scaling of regeneration equipment, glycol regeneration failure which can all cause the problem of MEG regeneration system operated abnormally. This paper analysis the main problems of MEG regeneration system at home and abroad, and proposes solutions which can provide reference for Kelameili gas field process improvement. The MEG regeneration process parameters are simulated and optimized and the low capacity MEG regeneration process is designed. Under the condition that the process can operate smoothly, the new MEG regeneration system try to simplify the process by using coil heat exchanger at the top of the tower, abolishing the reflux tank and reflux pump. The efficient equipment is selected such as plate heat exchanger to improve efficiency. The new MEG regeneration process provides a reference for the future design of small MEG regeneration system.The wellhead pressure of the gas fields declines sharply after production. To meet the process needs of the of late-stage low-pressure gas in the gas fields, the analysis and comparison is carried out on high and low pressure gas treatment process. Low pressure gas processing programs are studied based on natural gas process program used in gas fields. Three low-pressure gasrocess programs are proposed which are gathering station booster program, treatment plant booster program and refrigeration processing program by a cold source. The low pressure gas propane refrigeration system was recommended after analyse and follow the processing program that has been built. A propane refrigeration cycle process, combined with the existing gas field high-pressure throttling refrigeration treatment process, the transformation process of the low pressure gas propane refrigeration cycle, which provided technical support for the future design of the propane refrigeration system.