Studies on Improving Drainage Gas Recovery Efficiency of Gas Wells
Nearly forty percent of gas wells in Daqing Oil Field have been producing water, resulting in reduced production and increased cost. Reasonable measures are required to improve drainage gas efficiency of these wells. Based on the influencing factors of drainage gas recovery process, efficiency could be improved in three aspects, including optimizing drainage gas recovery process, optimizing drainage gas recovery project design, and improving the quality of materials and equipments. An optimal recovery process is selected by comprehensive analysis of process characteristics, well parameters, and economic benefits. Recovery projects are individually designed to ensure the high performance, safety, and economy of the projects. Materials and equipments are checked and tested to support smooth implement of the projects. By doing so, drainage gas recovery is improved. Results from optimized recovery in Q block of Daqing Oil Field show that an accumulative increased production of 2.2 × 107 m3 has been achieved, economic benefit is 22 million RMB, and input–output ratio is 1:5.
KeywordsDaqing oil field Drainage gas recovery Gas well Project design Input–output ratio
The research is supported by study on the technology of gas drainage in the stable stage of gas wells in Daqing Oil Field NO. dqp-2014-yc-ky-007.
- 1.Ma PG, Yang F (2011) Foam drainage gas recovery technology of high temperature deep volcanic gas reservoir. Prod Eng Res Devel 1(2):26–29Google Scholar
- 2.Xu DK, Ma PG, Yang ZP (2015) Practice and understanding of improving quality of drainage gas recovery dosing. Technol Superv Petr Ind 31(9):15–17Google Scholar
- 3.Chen ZB, Zhang WB (2016) Gas recovery technology by water drainage at subsea wellheads in offshore marginal gas fields. Nat Gas Ind 36(2):25–29Google Scholar
- 4.Bai YY, Hu H (2015) The gas recovery technology in Gulige gas field Journal of Yulin College. J Yulin Inst 4(4):7–9Google Scholar
- 5.Shi Y, Tang RG (2001) Research on new drainage gas recovery technology for water-bearing gas well. Drill Prod Technol 24(5):29–34Google Scholar
- 6.Tang GL, Duan FH (2003) Strengthening earlier stage proof of drainage gas recovery technology to improve the effect of process measures. Drill Prod Technol 26(2):16–20Google Scholar
- 8.Wu JH, Xiong CM, Lei Q (2016) Application of gmini surfactant in preparing foaming drainage agent with resistance to high temperature and high salinity. Oil Drill Prod Technol 38(2):256–259Google Scholar
- 9.Li QD, Lu YD, Li SJ (2011) Development and performance evaluation of a new efficient foam discharging agent LYB-1. Nat Gas Ind 31(6):1–4Google Scholar
- 10.Liu JC, Yang M, Yuan FF (2008) Foam properties of new foaming composition SP for bottom liquid withdrawal from gas production wells. Oilfield Chem 25(2):111–114Google Scholar