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Exploration method for tundra natural gas hydrate

A natural gas and hydrate technology, applied in geophysical measurement, instruments, etc., can solve problems such as the description of incapable natural gas hydrate occurrence area, interference of detection results, etc., to achieve the effect of eliminating shielding phenomenon and high application value

Inactive Publication Date: 2015-02-25
PETROCHINA CO LTD
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Problems solved by technology

All the above-mentioned methods can obtain the indication information of natural gas hydrate, but due to the existence of permafrost, the detection results will be interfered to varying degrees. a comprehensive description of the

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  • Exploration method for tundra natural gas hydrate
  • Exploration method for tundra natural gas hydrate
  • Exploration method for tundra natural gas hydrate

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Embodiment Construction

[0051] In order to have a clearer understanding of the technical features, purposes and beneficial effects of the present invention, the technical solution of the present invention is described in detail below, but it should not be construed as limiting the scope of implementation of the present invention.

[0052] An embodiment of the present invention provides a method for exploring natural gas hydrate in a permafrost zone. The working area of ​​the embodiment of the present invention is described by taking the permafrost zone of Qilian Mountains as an example. Such as figure 1 As shown, the exploration method of natural gas hydrate in the permafrost zone includes the following steps:

[0053] S101: Divide the pre-measured work area into five detection zones with different depths. Taking the ground height as 0 meters, the detection zones from the ground to the underground are: >0.1 meters high-altitude atmospheric detection zone, 0.1 to 0 meters 0 meter surface vegetation d...

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Abstract

The invention provides an exploration method for tundra natural gas hydrate. The method includes the steps that a work area is divided into different detection zones; atmosphere methane concentration data obtained after atmospheric sounding satellite retrieval are utilized, leakage methane information of upper atmosphere is acquired, and abnormal atmosphere methane areas are confirmed; based on remote sensing data with red edge wavebands, land vegetation chlorophyll change information is extracted, the poison condition of methane to land vegetation is acquired, and earth surface leakage areas are confirmed; based on earth surface soil hydrocarbon oil gas chemical exploration data, soil methane content information is extracted, the enrichment condition of methane in shallow surface soil is acquired, and shallow surface leakage areas are confirmed; based on ground penetrating radar data, radar wave fuzzy areas in a tundra are extracted, the enrichment condition of methane in shallow frozen soil is acquired, and leakage areas in the shallow frozen soil are confirmed; based on transient electromagnetic response data, deep stratum resistivity information is extracted, deep stratum apparent resistivity information is acquired, and occurrence positions are confirmed; in combination of the information, the conclusion whether a natural gas hydrate exploration prospect exists in the work area is made.

Description

technical field [0001] The invention relates to exploration technology, in particular to a method for exploring natural gas hydrate in permafrost zone by using the detection technology with depth gradient, and belongs to the technical field of natural gas exploitation. Background technique [0002] The world's oil and gas resources are seriously insufficient, and it is imminent to find new energy sources. Natural gas hydrate reserves are huge on the earth. It is estimated that the amount of methane resources in natural gas hydrates can reach 2×10 16 m 3 , which is twice the total carbon content of the proven coal, oil and natural gas resources on the earth. It is recognized as the largest new energy source that has not yet been developed on the earth. It has huge potential and is currently a research hotspot in various countries. [0003] Natural gas hydrate is a crystalline solid substance formed by gas molecules such as methane and water at low temperature (70K-350K, gene...

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Application Information

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IPC IPC(8): G01V11/00
Inventor 邢学文谢兴于世勇申晋利
Owner PETROCHINA CO LTD
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