Lithologic Reservoirs ›› 2017, Vol. 29 ›› Issue (3): 147-151.doi: 10.3969/j.issn.1673-8926.2017.03.018

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A new method of measuring critical liquid carrying flow rate in the variable wellbore-rate gas well: a case of multi-completion gas wells in Xihu Sag, the East China Sea

LU Kefeng, JIAN Jie, ZHANG Yanzhen, ZHU Wenjuan, XIAO Han   

  1. Exploration and Development Research Institute, Shanghai Branch of CNOOC Ltd., Shanghai 200335, China
  • Received:2016-07-20 Revised:2016-09-19 Online:2017-05-21 Published:2017-05-21

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Abstract: For the constant wellbore-rate gas well, the critical liquid carrying flow rate depends on cross-sectional area of wellbore. However, in the research of multi-completion gas wells in Xihu Sag of the East China Sea, there aer 39% of the survey wells with the accumulated fluid levels located at the sliding sleeves. A set of determination method of measuring critical liquid carrying flow rate in the variable wellbore-rate gas wells was formed by building a regional critical liquid carrying flow rate model with gas wells. This method includes the selection of fitting data of model coefficient X, the condition of filtering the wellbore node where is most likely to appear accumulated fluid, and the transformation method of turning the critical liquid carrying flow rate at the wellbore node to that in the whole well. The result shows that sectional flow distribution in multi-completion gas wells results more effusion than that in single layer wells and the accumulated fluid levels are usually located at the sliding sleeves. The study has certain reference significance for rational production adjustment in multi-completion gas wells.

Key words: logging while drilling(LWD), azimuthal gamma, gamma imaging, color calibration, image processing

CLC Number: 

  • TE372
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