Volume 37 Issue 1
Feb.  2020
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YANG Chen, SUI Shiyuan, JIA Wenfeng, WANG Chengcheng, YAO Yiming, SHEN Ziqi. Study on Acidic Slick Water for Fracturing Calcium-rich Shale Gas and Oil[J]. DRILLING FLUID & COMPLETION FLUID, 2020, 37(1): 116-120,126. doi: 10.3969/j.issn.1001-5620.2020.01.019
Citation: YANG Chen, SUI Shiyuan, JIA Wenfeng, WANG Chengcheng, YAO Yiming, SHEN Ziqi. Study on Acidic Slick Water for Fracturing Calcium-rich Shale Gas and Oil[J]. DRILLING FLUID & COMPLETION FLUID, 2020, 37(1): 116-120,126. doi: 10.3969/j.issn.1001-5620.2020.01.019
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Study on Acidic Slick Water for Fracturing Calcium-rich Shale Gas and Oil

doi: 10.3969/j.issn.1001-5620.2020.01.019

  • 1. State Key Laboratory of Shale Oil Gas Enrichment Mechanisms and Effective Development, Beijing 100101;

  • 2. Sinopec Research Institute of Petroleum Engineering, Beijing 100101;

  • 3. China University of Petroleum(Beijing), Beijing 102249

  • Received Date: 2019-10-15
  • Publish Date: 2020-02-28
    Abstract
  • The result of fracturing nonMarine shale by conventional slick-water with poor anti-swelling effect and without dissolving calcium function is unsatisfactory. Therefore, it is urgent to develop a novel multifunctional slick-water system integrating drag reduction, dissolution, fracture, anti-swelling and sand carrying. In this study, a new type of acid-resistant drag reduction agent was synthesized, which has good viscosity-increasing and stable performance in acid. Corrosion inhibitor with the dual function was optimized to greatly improve the anti-swelling and corrosion mitigation. The multifunctional acidic slick-water was formed by adding clay stabilizer and the cleanup additive. The results show that the acidic slick-water with drag reduction rate up to 69%, anti-swelling rate higher than 90%, surface tension less than 28 mN/m, and the corrosion rate less than 5 g·m-2/h meets various performance requirements. After field test, it shows good effect of reducing pressure and resistance, and plays an important role in dissolving, expanding fracture and pressure reduction in fracturing. Thus, the acidic slick-water has good promoted application prospect.

     

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