注CO2提高采收率技术现状及发展趋势

Abstract

Abstract:

There are broad prospects of CO₂ flooding for enhancing oil recovery and greenhouse gas storage. In this paper, we reviewed the development history and brief situation of CO₂ flooding at home and abroad, analyzed the development status of CO₂ immiscible flooding and CO₂ huff and puff, and summarized the phase state of CO₂ flooding, oil displacement mechanism evaluation and optimization design technology of CO₂ flooding reservoir engineering. The design focused on improving oil displacement efficiency and sweep efficiency, controlling viscosity index and gas breakthrough, achieving miscible or near-miscible flooding, and optimizing well pattern and injection parameters in combination with reservoir characteristics. It was pointed out that CO₂ near-miscible flooding and increasing sweep volume were the development trends of CO₂ flooding. WAG, foam flooding, fracture sealing and local gravity flooding were important means to prevent gas channeling. On the basis of summarizing the current CO₂ flooding technology and field experience at home and abroad, the top-level design of combination of CO₂flooding and CO₂ geological storage should be done according to different types of reservoir characteristics.

Key words: CO₂ flooding, enhanced oil recovery, CO₂ huff and puff, prevent gas channeling, present situation and development trend

CLC Number:

TE341

Li Shilun,Tang Yong,Hou Chengxi. Present situation and development trend of CO₂ injection enhanced oil recovery technology[J].Reservoir Evaluation and Development, 2019, 9(3): 1-8.

Figures/Tables 12

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Present situation and development trend of CO₂ injection enhanced oil recovery technology

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Present situation and development trend of CO2 injection enhanced oil recovery technology

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Present situation and development trend of CO₂ injection enhanced oil recovery technology