Low cost process optimization of surface gas gathering system in X block of Yan'an Gas Field
In recent years,it has been found in Yan'an Gas Field that the formation pressure of blocks using medium pressure gathering technology has decreased too fast,and some single wells are difficult to produce due to low pressure.Meanwhile,being affected by the harsh environment,pipelines have large position fluctuations and serious liquid accumulation problems.Although the problem can be mitigated in the short term by using wellhead pressurization and pipeline pigging,it is still difficult to achieve the designed stable production period.It is necessary to increase the pressure in advance as a whole,which results in a large waste of investment.The original process route of X block is medium pressure gas gathering with"centralized chemical injection,single well tie-in,wellhead metering,and gas return for use".After the analysis of production test data and the comparison of multiple schemes,by using the lower pressure of the gathering system,this paper applies the process route of"cross-well connection,two-stage pressurization,mobile metering,and station self-using".The number of pigging facilities is reduced by 40 and the length of the flow line is reduced by 133 km.The wellhead fixed metering,methanol injection,and return gas pipelines are canceled.In addition,there is no need to build supporting facilities for chemical injection and water treatment equipment.Eventually,these measures reduce the investment by 23.682 9 million CNY.Also avoiding the investment in boosting facilities of 127.81 million CNY at the end of the stable production period,the overall investment has been reduced by 151.49 million CNY of X block,showing good economic benefits.
Yan'an Gas Fieldgas gathering systemlow costprocess optimization
万方数据
维普
