Reservoir Evaluation and Development ›› 2022, Vol. 12 ›› Issue (2): 329-336.doi: 10.13809/j.cnki.cn32-1825/te.2022.02.008

• Tight Gas Development • Previous Articles     Next Articles

Test and application of new amphoteric-nonionic foaming agents in Lower Palaeozoic gas reservoir

YANG Bing1(),ZHANG Tailai1,LI Jia2,ZHAO Jianjun1,WANG Chengfeng1   

  1. 1. No.1 Gas Production Plant, Sinopec North China Oil and Gas Company, Yulin, Shaanxi 719000, China
    2. Hydrocarbon Production Engineering Service Center, Sinopec North China Oil and Gas Company, Jinzhong, Shanxi 030600, China
  • Received:2021-09-28 Online:2022-05-07 Published:2022-04-26

Abstract:

The formation water of Lower Palaeozoic gas reservoir in Daniudi Gas Field is high-salinity and acidity, and downhole throttling technology is mostly used. Thus, the amphoteric foaming agents widely used in gas fields has poor foaming and foam stabilization performance, and this cannot meet the demand for high-efficiency and low-cost drainage gas recovery. Although dozens of foaming agents have been formed internationally, there is no reports about foaming agents developed for the characteristics of Lower Palaeozoic reservoir of Daniudi Gas Field. Considering the fluid and process characteristics of Lower Palaeozoic reservoir, and the influence of high-salinity formation water, the sensitivity to pH and the stability of foam passing through the choke, to construct a new type amphoteric-nonionic compound foaming agent with sulfonated AEO3 and lauramide propyl phosphobetaine as the main agent, coconut oil fatty acid monoethanolamide as the foaming aid, and sapindus extract as the foam stabilizer. The indoor evaluation shows that the amphoteric-nonionic composite foaming agent has strong foaming, stabilizing-foam, secondary foaming and liquid-carrying ability under high-salinity and acidic; after the field test application, the well drainage capacity improved, the pressure difference with tubing to casing decreased, and the gas production increased. It is shown that its application effect and economic benefits prospects are good. The amphoteric-nonionic composite foaming agent fills the void of the foaming agent for Lower Palaeozoic gas reservoir in Daniudi Gas Field, improving the technical problems of insufficient liquid-carrying, and has the value of popularization and application.

Key words: Daniudi Gas Field, Lower Palaeozoic gas reservoir, amphoteric-nonionic compound foaming agent, anti-mineralization, secondary foaming

CLC Number: 

  • TE357