Three-dimensional time-lapse seismic observation reservoir monitoring method and system

A time-lapse seismic and reservoir technology, applied in the directions of surveying, mining fluid, earthwork drilling, etc., can solve problems such as average gas output, mining duration, drastic changes in geological environment, etc.

Inactive Publication Date: 2019-03-08
GUANGZHOU MARINE GEOLOGICAL SURVEY
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Problems solved by technology

[0002] In 2017, my country achieved the first successful trial mining of combustible ice in the sea area, realizing a historic breakthrough in the development of natural gas hydrate in my country. However, from trial mining to commercial mining, it stil

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  • Three-dimensional time-lapse seismic observation reservoir monitoring method and system
  • Three-dimensional time-lapse seismic observation reservoir monitoring method and system

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[0027] The present invention is described in further detail now in conjunction with accompanying drawing. These drawings are all simplified schematic diagrams, only illustrating the basic flow of the present invention in a schematic manner, so they only show the flow related to the present invention.

[0028] Such as figure 1 As shown, the present invention provides a kind of three-dimensional time-lapse seismic observation reservoir monitoring method, and the method is specifically:

[0029] S1. Obtain the physical parameters of the natural gas hydrate reservoir and the underlying free gas layer before and after exploitation;

[0030] S2. Calculate porosity, saturation and reserves according to physical parameters;

[0031] S3. Analyze the gas hydrate accumulation model according to the calculation results of porosity, saturation and reserves.

[0032] Step S1: Obtain the physical property parameters of the natural gas hydrate reservoir and the underlying free gas layer be...

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Abstract

The invention relates to a three-dimensional time-lapse seismic observation reservoir monitoring method and system. The three-dimensional time-lapse seismic observation reservoir monitoring method comprises the steps of obtaining physical parameters of before and after mining of a gas hydrate reservoir and an underlying free gas layer; calculating porosity, saturation and reserves according to thephysical parameters; and analyzing a hydrate accumulation model according to a calculated result of the porosity, the saturation and the reserves. According to the three-dimensional time-lapse seismic observation reservoir monitoring method, monitoring variation of the reservoir before and after gas mining is realized, the hydrate accumulation model is analyzed, and data supporting is provided for the mining safety of hydrates.

Description

technical field [0001] The invention relates to an earthquake monitoring method, in particular to a three-dimensional time-lapse seismic observation reservoir monitoring method and system. Background technique [0002] In 2017, my country achieved the first successful test mining of combustible ice in the sea area, realizing a historic breakthrough in the development of natural gas hydrate in my country. However, from trial mining to commercial mining, it still faces the average gas output, the duration of mining, and the mining project is accompanied by drastic changes in the geological environment. A lot of research and experiment work is still needed to solve scientific, safety, and environmental problems. In order to better explain the accumulation mechanism of gas hydrate, scholars at home and abroad combined different research examples, among which AVO analysis technology plays a very important role in fluid identification technology. AVO analysis technology builds a b...

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Application Information

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IPC IPC(8): E21B47/00E21B43/01
CPCE21B43/01E21B47/00E21B41/0099
Inventor 王伟巍董广黄建宇谢城亮
Owner GUANGZHOU MARINE GEOLOGICAL SURVEY
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