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<p>This study comprehensively analyzes and evaluates the development scheme of Bai 802 well fractured-block Carboniferous reservoir in Nine Area of Karamay Oilfield. The reservoir is located in the northwestern edge of Junggar Basin, and is a fractured-block reservoir with dual fracture-porosity media under tectonic control. The study begins with a detailed description of the geological characteristics of the reservoir, including stratigraphy, tectonics, reservoir properties, and fluid properties. Based on the special situation of the reservoir, the development program adopted horizontal well volume fracturing technology to increase the recoverable reserves and oil recovery efficiency of the reservoir. The longitudinal span of the reservoir and the type of reservoir space were considered in the program design, and reasonable well spacing and horizontal section length were determined. Through comprehensive well test method, analogy method and economic limit production capacity method, single well production capacity was predicted, and 20 horizontal wells were deployed as a whole to achieve a new production capacity of 10.8·10<sup>4</sup> tons. The review stated that the scheme design is reasonable and aligns with the actual reservoir, and also offered suggestions to further optimize the well spacing and improve the degree of well control. This study offers important references and lessons for effectively developing similar low porosity and extra low permeability reservoirs.</p>

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Optimizing Development Strategies for Low-Porosity Fractured-Block Reservoirs

  • 期刊论文

  • 发表日期：

    2025年9月1日

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  • Xiang Dai,
  • Long You,
  • Xiaopeng Bai,
  • Li Wang,
  • Menglu Zhang,
  • Junqiang Song,
  • Ting Li,
  • Hong Pan,
  • Chuixian Kong,
  • Dongsheng Yao,
  • Shihong Li,
  • Guanxing Luo,
  • Wenying Wu

摘要

This study comprehensively analyzes and evaluates the development scheme of Bai 802 well fractured-block Carboniferous reservoir in Nine Area of Karamay Oilfield. The reservoir is located in the northwestern edge of Junggar Basin, and is a fractured-block reservoir with dual fracture-porosity media under tectonic control. The study begins with a detailed description of the geological characteristics of the reservoir, including stratigraphy, tectonics, reservoir properties, and fluid properties. Based on the special situation of the reservoir, the development program adopted horizontal well volume fracturing technology to increase the recoverable reserves and oil recovery efficiency of the reservoir. The longitudinal span of the reservoir and the type of reservoir space were considered in the program design, and reasonable well spacing and horizontal section length were determined. Through comprehensive well test method, analogy method and economic limit production capacity method, single well production capacity was predicted, and 20 horizontal wells were deployed as a whole to achieve a new production capacity of 10.8·104 tons. The review stated that the scheme design is reasonable and aligns with the actual reservoir, and also offered suggestions to further optimize the well spacing and improve the degree of well control. This study offers important references and lessons for effectively developing similar low porosity and extra low permeability reservoirs.