靖边气田喷射器和压缩机组合增压新工艺

中国石油长庆油田公司靖边气田目前采用的压缩机增压工艺存在着高压气井能量利用率低、压缩机长期处于低载荷运行等突出问题。为此，在对靖边气田现有压缩机站运行现状及喷射器应用实践进行分析的基础上，提出了利用喷射器和压缩机进行组合来增压的新模式。喷射增压可以充分利用高压气源的能量，实现低压气井增压，再与压缩机组合应用，可以明显提高增压站的能量利用效率。采用数值仿真技术对喷射器和压缩机组合应用模式进行了模拟计算，结果表明，该组合应用模式可以实现3个方面的应用效果：①对高压气井节流浪费的部分能量进行利用，可提升能量利用效率；②进一步降低被引射的低压井井口压力，可提高低压气井的最终采收率；③可减少压缩机低载荷运行时间，延长压缩机使用寿命，降低压缩机维护成本。结论认为，该工艺在气田增压稳产的中后期具有良好的经济效益和广阔应用前景。

A new technique of supercharging by ejectors and compressors in the Jingbian Gas Field,Ordos Basin

Since the compressor supercharging was applied in the Jingbian Gas Field, Ordos Basin, there have had such prominent problems as low energy efficiency in high pressure gas wells, the compressor's being under long time low load operation, and so on. In view of this, based on the analysis of the present situation of compressor supercharging used in this field and the ejector's application cases, this paper presents a new technique of supercharging by ejectors and compressors. Pressurization by ejectors is to take full advantage of the energy of high pressure gas sources to achieve boosting of low pressure gas wells; if this is used together with the compressors, the energy efficiency will be obviously enhanced for a pressure boosting station. The numerical simulation demonstrates that this combination of ejectors and compressors can help achieve the following satisfactory results: a. the energy efficiency can be improved by utilizing the partial wasted energy from the throttling in high pressure gas wells; b. the wellhead pressure can be further reduced in the ejected low pressure wells, the ultimate recovery of which will be thus enhanced; c. the compressor's low load running time can be shortened so that its life span will be prolonged and its maintenance cost will be cut down. This combined pressure boosting technology brings good economic benefit and thus has a bright and wide application prospect during the middle and late stages of stable yield by pressurization in fields.