Special Oil & Gas Reservoirs >

2022 , Vol. 29 >Issue 2: 141 - 148

DOI: https://doi.org/10.3969/j.issn.1006-6535.2022.02.021

Drilling & Production Engineering

Study and Application of Fine Segmented Deep Acid Fracturing Technology for Horizontal Wells

  • Miao Juan ,
  • He Xusheng ,
  • Wang Dong ,
  • Chen Hongyuan ,
  • Xiao Zhenhua
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  • 1. Southwest Petroleum University, Nanchong, Sichuan 637500, China;
    2. PetroChina Southwest Oil and Gasfield Company, Chengdu, Sichuan 610000, China;
    3. PetroChina Shanghai Marketing Company, Shanghai 201100, China

Received date: 2020-11-12

  Revised date: 2021-11-04

  Online published: 2023-01-10

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Abstract

Carbonate gas reservoirs in Sinian Dengying Formation, Gaoshiti-Moxi Area, Sichuan Basin is geologically characterized by ultra depth, high temperature, low porosity, low permeability, and high heterogeneity, bringing new challenges for reservoir stimulation. The existing stimulation technologies need to be further optimized. With laboratory experiments and theoretical studies, the reservoir fracturability was evaluated quantitatively, the acidizing fluid system and acid fracturing technologies were selected preferably, and parameters, such as acidizing fluid injection, displacement and injection intensity, were optimized. The fine segmented deep acid fracturing technology for horizontal wells was developed and applied in the field. The results showed that the technology achieved good results by application to 32 wells in carbonate gas reservoirs in Dengying Formation, Gaoshiti-Moxi Area, the average daily gas production of single test well was 79.8×104 m3/d, and there were 10 wells reaching a daily gas production of 1 million m3/d. This technical system has achieved obvious fracturing effect and can provide technical support for the efficient development of carbonate reservoirs with low porosity and permeability.

Key words： horizontal well; acid fracturing; carbonate rock; Dengying Formation; Gaoshiti-Moxi Area; Sichuan Basin

Cite this article

Miao Juan , He Xusheng , Wang Dong , Chen Hongyuan , Xiao Zhenhua . Study and Application of Fine Segmented Deep Acid Fracturing Technology for Horizontal Wells[J]. Special Oil & Gas Reservoirs, 2022 , 29(2) : 141 -148 . DOI: 10.3969/j.issn.1006-6535.2022.02.021

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