Natural Gas Geoscience

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Application of multistage temporary plugging in Gaoshiti-Moxi reservoir

Gong Wei,Yuan Can-ming   

  1. Downhole Operation Branch of CNPC Sichuan-Changqing Drilling & Exploration Corporation,Chengdu 610051,China
  • Received:2016-06-10 Revised:2016-09-08 Online:2017-08-10 Published:2017-08-10

Abstract:

In the stimulation process of carbonate gas reservoirs in the Gaoshiti-Moxi area of Sichuan Basin,problems like the difficulty in reasonable acid placement due to long construction intervals and strong reservoir heterogeneity exist in those highly deviated. In order to provide a solution,laboratory research and pilot tests were conducted,and a new diversion (multistage temporary plugging) technology applicable to gas wells was developed. Based on the laboratory experiment,the soluble ball has a high degradation rate,fully meeting the field construction requirements of natural gas wells. The application in typical wells shows that,the production increase of wells adopting this technology is tremendously higher than other wells adopting other acid placement technologies. This technology provides a brand new acid placement solution for natural gas wells as well as a new technical approach to the acidizing frac treatment of long construction intervals and heterogeneous reservoirs,so it is of large-scale popularization and application values.

Key words: Soluble ball, Multistage temporary plugging, Strong reservoir heterogeneity, Reorientation, Application values

CLC Number: 

  • TE242

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