Reservoir Evaluation and Development ›› 2019, Vol. 9 ›› Issue (2): 17-20.

• Reservoir Evaluation • Previous Articles     Next Articles

Application of a well testing simulation technique in productivity evaluation of well-X1 in high temperature and high pressure reservoir

Lei Xiao,Li Shusong,Wang Wenjuan,Zhang Fengbo,He Zhihui,Ma Shuai   

  1. Zhanjiang Branch of CNOOC(China) Ltd., Zhanjiang, Guandong 524057, China
  • Received:2017-09-23 Online:2019-04-26 Published:2019-05-07

Abstract:

The following problems stood out in the deliverability tests and analysis of gas wells with high temperature and high pressure(HTHP) in South China Sea. Firstly, it was unable to accurately calculate the variable mechanical skin factors, resulting in the negative slope of deliverability equation, bringing about inaccurate calculation of the absolute open flow of HTHP gas wells. One new simulation technique, mainly consisting of variable skin analysis and productivity numerical simulation, for HTHP gas wells was proposed, and then the real damage could be evaluated accurately. In addition, the absolute open flow of HTHP gas wells was calculated based on flowing pressure and rates data in deliverability test simulation, eliminating the negative slope of deliverability equation. This simulation technique had been applied successfully well-X1 of HTHP gas reservoir in South China Sea, providing guidance for gas field production.

Key words: high temperature and high pressure, variable mechanical skin factor, absolute open flow, well testing simulation technique

CLC Number: 

  • TE373