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Quantitative Study of Diagenesis and Dissolution Porosity in Conglomerate Reservoirs

  • INNOVATIVE TECHNOLOGIES OF OIL AND GAS
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Chemistry and Technology of Fuels and Oils Aims and scope

In order to clarify the diagenesis of the conglomerate reservoir in the Lower Wuerhe Formation in Mahu 1 well area, Junggar Basin, the reservoir in the study area was studied in detail on the basis of core observation, thin section identification and analysis data. The results show that the Lower Wuerhe Formation is a reservoir with low porosity and low permeability. The pore types are mainly residual intergranular pores, followed by dissolution pores, and occasionally structural fractures and microfractures. The reservoir physical property is closely related to the rock facies type, among which the fine conglomerate is the best, the small conglomerate is the second, and the middle conglomerate is the worst. The Lower Wuerhe Formation in the study area mainly experienced diagenesis such as compaction, cementation and dissolution. In the later stage of diagenesis, zeolite minerals were transformed and dissolved, and a large number of dissolution pores were formed, which had a positive effect on reservoir physical property and oil content. Through three solution pore porosity intersection method to establish evaluation model, and solution pore zeolites in the studied area development situation to carry on the quantitative evaluation, fine recognition, effectively guide the advantage dessert for reservoir evaluation and subsequent development provides new ideas and methods, as well as neighbors area and the development of other clastic rock area reservoir development for reference.

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Acknowledgments

This study was strongly supported by the National Natural Science Foundation of China (NSFC), “Development Characteristics of conglomerate in large fan-delta facies of continental Lacustrine Basin and its influence from Paleoclimate: A Case study of Triassic Baikouquan Formation in Mahu Sag, Junggar Basin” (No. 41872118).

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Authors and Affiliations

  1. School of Earth Sciences, Yangtze University, Wuhan, China

    Zhen Liu & Weifeng Li

  2. Research Institute of Exploration and Development, Xinjiang Oilfield Company, Petrochina, Karamay, China

    Sheng Li & Jie Zhang

  3. Liaohe oilfield Company, Petrochina, Panjin, China

    Mengtao Li & Qunchao Xu

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  1. Zhen Liu
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  2. Sheng Li
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  3. Jie Zhang
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  4. Weifeng Li
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  5. Mengtao Li
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  6. Qunchao Xu
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Correspondence to Zhen Liu.

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Translated from Khimiya i Tekhnologiya Topliv i Masel, No. 6, pp. 97–102 November – December, 2022.

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Liu, Z., Li, S., Zhang, J. et al. Quantitative Study of Diagenesis and Dissolution Porosity in Conglomerate Reservoirs. Chem Technol Fuels Oils 58, 1035–1045 (2023). https://doi.org/10.1007/s10553-023-01486-9

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  • DOI: https://doi.org/10.1007/s10553-023-01486-9

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