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Study on the Influencing Factors of Pre-CO2 Blowback After Pressure

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Proceedings of the International Field Exploration and Development Conference 2023 (IFEDC 2023)

Part of the book series: Springer Series in Geomechanics and Geoengineering ((SSGG))

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Abstract

This paper studies the main control factor analysis of shale oil fracturing fluid backflow, and calculates and sorts the weight of each influence factor under 285 samples in west 233 and Zhuang 183 blocks by grey correlation method, the main control factors of shale oil fracturing fluid reflow are segment number, sand ratio and volume of reflow, and the correlation between influencing factors and reflow rate is established based on fuzzy set theory. Taking the construction parameters of Huxx well as an example, a pre-co2 fracturing model of shale oil is established, based on the effects of different CO2 injection rate, pressure difference and muffle well time on slippage water reflow rate, CO2 reflow rate and cumulative oil production, the optimal injection rate of CO2: the injection rate of subsequent slip water (including sand-carrying fluid, displacement fluid, etc.) should be more than 20%, the optimal shut-in time is 15 days, and the optimal bottom hole flowing pressure is 8 mpa.

Copyright 2023, IFEDC Organizing Committee.

This paper was prepared for presentation at the 2023 International Field Exploration and Development Conference in Wuhan, China, 20–22 September 2023.

This paper was selected for presentation by the IFEDC Committee following review of information contained in an abstract submitted by the author(s). Contents of the paper, as presented, have not been reviewed by the IFEDC Technical Team and are subject to correction by the author(s). The material does not necessarily reflect any position of the IFEDC Technical Committee its members. Papers presented at the Conference are subject to publication review by Professional Team of IFEDC Technical Committee. Electronic reproduction, distribution, or storage of any part of this paper for commercial purposes without the written consent of IFEDC Organizing Committee is prohibited. Permission to reproduce in print is restricted to an abstract of not more than 300 words; illustrations may not be copied. The abstract must contain conspicuous acknowledgment of IFEDC. Contact email: email: paper@ifedc.org.

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Author information

Authors and Affiliations

  1. CCDC Changqing Downhole Technology Company, **’an, China

    Yu-lei **a & Yu Gao

  2. Carbon Dioxide Fracturing and Yield Production Research Laboratory, CNPC, Bei**g, China

    Yu-lei **a

  3. **anyang Chuanqing **nyuan Engineering Technology Co., Ltd., **anyang, China

    Ji-sheng Jia

Authors
  1. Yu-lei **a
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  2. Yu Gao
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  3. Ji-sheng Jia
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Corresponding author

Correspondence to Yu-lei **a .

Editor information

Editors and Affiliations

  1. College of Petroleum Engineering, **'an Shiyou University, **’an, Shaanxi, China

    Jia'en Lin

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**a, Yl., Gao, Y., Jia, Js. (2024). Study on the Influencing Factors of Pre-CO2 Blowback After Pressure. In: Lin, J. (eds) Proceedings of the International Field Exploration and Development Conference 2023. IFEDC 2023. Springer Series in Geomechanics and Geoengineering. Springer, Singapore. https://doi.org/10.1007/978-981-97-0268-8_56

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  • DOI: https://doi.org/10.1007/978-981-97-0268-8_56

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  • Publisher Name: Springer, Singapore

  • Print ISBN: 978-981-97-0267-1

  • Online ISBN: 978-981-97-0268-8

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