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Research and practice of new acid arrangement technology in horizontal well with liner slot completion

Wang Ye-zhong1，Duan Guo-bin2，Sang Yu1，Peng Hua3，Zhang Lin1，Zhou Chang-lin1，Yu Liang-zhi4，Chen Wei-hua1   

  1. 1.Engineering and Technology Research Institute of Southwest Oil & Gas Field Company,CNPC,Guanghan 618300,China；
    2.Engineering Technology Department of Southwest Oil & Gas Field Company,CNPC,Chengdu 610051,China；
    3.Middle Sichuan Oil & Gas Field of Southwest Oil & Gas Field Company,CNPC,Suining 629000,China；
    4.Exploration Business Division of Southwest Oil & Gas Field Company,CNPC,Chengdu 610041,China
  • Received:2016-06-12 Revised:2016-09-12 Online:2017-08-10 Published:2017-08-10

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Abstract:

Liner slot completion is one of the main horizontal well completion types,which has remarkable advantages,such as huge discharge area,and low cost.Uniform acid arrangement is the key to stimulation of horizontal well with liner slot completion.It is hard to implement acid arrangement in horizontal well with liner slot completion,through the annulus space between liner slot and wellbore is not sealed successfully,routine sectional stimulation technologies are limited.A new acid arrangement technology in horizontal well with liner slot completion was generated,via theoretical and experimental research.It can define formation damage characteristics of different well intervals through predicting initial skin factor profile of horizontal well intervals.Mathematical model of acid flowing in horizontal well was established,and diversion pressure of different intervals was simulated.Optimizing the liner cutting parameters,and different diversion pressures were obtained by changing quantity of diversion dosage.The acid wormhole shape was characterized by numerical method,which is able to optimize acid system.It was applied to 8 wells in Anyue Gasfield.The average of stimulation multiple proportion was 1.95,and the average testing production of individual well increased about 67.3×104m3/d,compared with perforation completion,single well completion saving cost 9 million yuan.Therefore,the economic benefit is remarkable,which serves as a reference for other gas reservoir.

Key words: Liner slot completion, Horizontal well, Acid arrangement, Initial skin factor profile, Diversion pressure, Temporary plugging and diversion, Acid wormhole

CLC Number: 

  • TE142

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