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The hydraulic fracturing technology for tight oil reservoirs in China is mature, but some wells have poor fracturing effects and do not meet the expected production targets. Numerical simulations were conducted based on geological parameters, engineering parameters, and their ranges for tight oil blocks to determine the importance of different factors affecting productivity. A diagram illustrating the influence of geological and engineering parameters on tight oil fracturing production was established. Additionally, based on block production data, big data analysis of geological and engineering parameters and their correlations with production was conducted. The study quantified and ranked the impact of different factors on production, identifying the fracturing scale and cluster spacing as the main engineering parameters and reservoir oiliness and porosity–permeability conditions as the main geological parameters influencing tight oil production. A new type of nano imbibition displacement agent was developed to further enhance tight oil fracturing production. Core tests with the agent showed a 10% increase in recovery efficiency, and experimental wells with the new fracturing fluid showed a 28.8% higher post-fracturing production than conventional fracturing wells.

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Study on Main Factors Influencing Production and Experimental Techniques for Production Enhancement

  • 会议论文

  • 发表日期：

    2025年

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  • Litao Shang,
  • Tengfei Hou,
  • Erdong Yao,
  • Dawei Deng,
  • Wei Wang,
  • Wei Li

摘要

The hydraulic fracturing technology for tight oil reservoirs in China is mature, but some wells have poor fracturing effects and do not meet the expected production targets. Numerical simulations were conducted based on geological parameters, engineering parameters, and their ranges for tight oil blocks to determine the importance of different factors affecting productivity. A diagram illustrating the influence of geological and engineering parameters on tight oil fracturing production was established. Additionally, based on block production data, big data analysis of geological and engineering parameters and their correlations with production was conducted. The study quantified and ranked the impact of different factors on production, identifying the fracturing scale and cluster spacing as the main engineering parameters and reservoir oiliness and porosity–permeability conditions as the main geological parameters influencing tight oil production. A new type of nano imbibition displacement agent was developed to further enhance tight oil fracturing production. Core tests with the agent showed a 10% increase in recovery efficiency, and experimental wells with the new fracturing fluid showed a 28.8% higher post-fracturing production than conventional fracturing wells.