Land area natural gas hydrate exploration method and system

An exploration system and natural gas technology, applied in the field of exploration methods and systems for natural gas hydrates in land areas, can solve problems such as complex geological and geophysical conditions

Pending Publication Date: 2020-09-04
BC P INC CHINA NAT PETROLEUM CORP +1
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  • Abstract
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  • Application Information

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Problems solved by technology

The seismic reflection characteristics of natural gas hydrate in sea areas mainly include: BSR phenomenon, "blank reflection zone" of amplitude anomaly, velocity anomaly and AVO anomaly. Influenced by many aspects such as geothermal gradient, formation pressure and geological structure, the geological and geophysical conditions are more complex
At present, it is difficult to explore natural gas hydrates in land areas

Method used

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  • Land area natural gas hydrate exploration method and system
  • Land area natural gas hydrate exploration method and system

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Embodiment Construction

[0050] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0051] Those skilled in the art know that the embodiments of the present invention can be implemented as a system, device, device, method or computer program product. Therefore, the present disclosure may be embodied in the form of complete hardware, complete software (including firmware, resident software, microcode, etc.), or a combination of hardware and software.

[0052] In view of the difficulty in exploring land gas hydrates in the prior art, an embodim...

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Abstract

The invention provides a land area natural gas hydrate exploration method and system. The land area natural gas hydrate exploration method comprises the steps: exciting a vibroseis at a preset electromagnetic exploration point position to obtain first seismic data; increasing the number of coverage times of the first seismic data to obtain second seismic data; obtaining a tomography speed according to the second seismic data; performing magnetotelluric sounding at the electromagnetic sounding point to obtain a resistivity profile; obtaining a frozen soil distribution area according to the resistivity profile and the tomography speed; and according to the second seismic data, the resistivity profile and the distribution area of the frozen soil, obtaining the distribution area of the naturalgas hydrate so as to effectively explore the distribution area of the land area natural gas hydrate.

Description

technical field [0001] The invention relates to the field of exploration of natural gas hydrates in land areas, and in particular, to a method and system for exploration of natural gas hydrates in land areas. Background technique [0002] Natural gas hydrate has resource advantages such as low pollution, large reserves, wide distribution, and high energy density. It is known as the future strategic replacement energy and has attracted great attention from all countries in the world. Compared with marine gas hydrate, the exploration and exploitation of land gas hydrate is safer and more convenient. The seismic reflection characteristics of natural gas hydrate in the sea area mainly include: BSR phenomenon, "blank reflection zone" of amplitude anomaly, velocity anomaly and AVO anomaly, but compared with the stable pressure condition of the seabed, the stable distribution area of ​​natural gas hydrate in the tundra of land is affected by Geological and geophysical conditions a...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V11/00
CPCG01V11/00
Inventor 尹吴海赵刚章多荣张立军李成武刘乐
Owner BC P INC CHINA NAT PETROLEUM CORP
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