Characteristics of marine gas hydrate reservoir and its resource evaluation methods

LIU Changling; SUN Yunbao

doi:10.16562/j.cnki.0256-1492.2021082401

Marine Geology & Quaternary Geology > 2021 > 41(5): 44-57. > DOI: 10.16562/j.cnki.0256-1492.2021082401

LIU Changling, SUN Yunbao. Characteristics of marine gas hydrate reservoir and its resource evaluation methods[J]. Marine Geology & Quaternary Geology, 2021, 41(5): 44-57. DOI: 10.16562/j.cnki.0256-1492.2021082401

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Characteristics of marine gas hydrate reservoir and its resource evaluation methods

LIU Changling^1,2,,
SUN Yunbao^1,2, ,

1.
Key Laboratory of Gas Hydrate of Ministry of Natural Resources, Qingdao Institute of Marine Geology, Qingdao 266237, China
2.
Laboratory for Marine Mineral Resources, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266237, China

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Received Date: August 23, 2021
Revised Date: September 06, 2021
Available Online: September 25, 2021

Graphical Abstract

Abstract

Abstract

To accurately make resource evaluation is the prerequisite for development of natural gas hydrate resources, and the correct understanding of the characteristics of gas hydrate reservoir is the basis for such evaluation. The content and occurrence of gas hydrate are closely related to and affected by reservoir properties. The occurrence forms of gas hydrate, which includes pore-filling and fracture-filling, mainly depends on the nature and size of pores, fractures and other accumulation spaces in the marine sediments. Different types of hydrate reservoirs have different physical property response characteristics, which directly affects the accuracy of marine gas hydrate resource evaluation. The principles, evaluation parameters and applicability of the existing natural gas hydrate resource evaluation methods are different, and the occurrence type of hydrate is not considered. Based on the previous work, this paper puts forward a new method of "Detail Resource Evaluation" and "Precise Resource Evaluation" for marine natural gas hydrates. The "Detail Resource Evaluation" method based on small panel is suitable for the evaluation of pore-filled hydrate reservoir with rare drilling and dense geophysical survey network in favorable block; The "Precise Resource Evaluation" method based on the concept of "hydrate abundance in reservoir" is applicable to the accurate evaluation of small-scale hydrate orebody with dense well pattern in the well field, and can effectively improve the accuracy of the evaluation of fracture- filled types (e.g. massive, vein and nodule) hydrate resources.
- marine gas hydrate,
- occurrence form,
- reservoir characteristics,
- basic physical properties,
- resources evaluation method,
- resources

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References (89)

References

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