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Characteristics and Significance of Acid-Soluble Organic Matter in Marine Carbonate Source Rocks

Author

Listed:
  • Danting Feng

    (State Key Laboratory of Continental Dynamics, Department of Geology, Northwest University, Xi’an 710069, China)

  • Xiaofeng Wang

    (State Key Laboratory of Continental Dynamics, Department of Geology, Northwest University, Xi’an 710069, China)

  • Wenhui Liu

    (State Key Laboratory of Continental Dynamics, Department of Geology, Northwest University, Xi’an 710069, China
    Petroleum Exploration and Production Research Institute, SINOPEC, Beijing 100083, China)

  • Dongdong Zhang

    (State Key Laboratory of Continental Dynamics, Department of Geology, Northwest University, Xi’an 710069, China)

  • Jie Wang

    (Petroleum Exploration and Production Research Institute, SINOPEC, Beijing 100083, China)

  • Houyong Luo

    (State Key Laboratory of Continental Dynamics, Department of Geology, Northwest University, Xi’an 710069, China)

  • Peng Liu

    (College of Safety Science and Engineering, Xi’an University of Science and Technology, Xi’an 710054, China)

Abstract

Since the 1950s, major breakthroughs have been made in the field of carbonate oil and gas exploration, and large reservoirs have been found in carbonate strata in many countries; however, the validity of highly evolved carbonate source rocks has been controversial. Because of the loss of organic carbon during acid-solution processing in conventional total organic carbon (TOC) determination, we decided to use a new method of reducing acid-solution losses in order to more effectively quantify acid-soluble organic matter in carbonate rock samples. Different levels of acid-soluble organic matter were present in different types of samples, and there was no positive correlation between the content of acid-soluble organic matter and conventionally measured TOC values. However, the thermal evolutionary maturity of samples with high acid-soluble organic matter content is relatively low, and the high hydrocarbon generation conversion rate of acid-soluble organic matter and conventional TOC in carbonate rocks is an important reason for the low residual TOC in highly evolved carbonate rocks. The new method is helpful in re-evaluating the abundance of organic matter in carbonate rocks and in providing evidence for studying hydrocarbon generation and the hydrocarbon capacity of carbonate source rocks.

Suggested Citation

  • Danting Feng & Xiaofeng Wang & Wenhui Liu & Dongdong Zhang & Jie Wang & Houyong Luo & Peng Liu, 2023. "Characteristics and Significance of Acid-Soluble Organic Matter in Marine Carbonate Source Rocks," Energies, MDPI, vol. 16(4), pages 1-14, February.
    • Handle: RePEc:gam:jeners:v:16:y:2023:i:4:p:2017-:d:1072546
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