Pressing method for methane hydrate containing rock core sample

A technology for methane hydrate and core samples, applied in the oil and gas field, can solve problems such as the inability to ensure the consistency of the basic characteristics of the core and the target reservoir.

Active Publication Date: 2015-09-30
QINGDAO INST OF MARINE GEOLOGY
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Problems solved by technology

[0006] The purpose of the present invention is to provide a method for pressing rock core samples containing methane hydrate, which solves the problem that the consistency bet

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  • Pressing method for methane hydrate containing rock core sample
  • Pressing method for methane hydrate containing rock core sample
  • Pressing method for methane hydrate containing rock core sample

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Embodiment Construction

[0057] The present invention will be described in detail below in combination with specific embodiments.

[0058] figure 1 Be the schematic diagram of this technological process, the step of technological process of the embodiment of the present invention is as follows:

[0059] (1) Determine the basic characteristics of the pressed core:

[0060] Hydrate-bearing sediment core SH2B in the Shenhu area of ​​the South China Sea is used as the target hydrate reservoir sample, and its basic characteristics are used to determine the actual physical model characteristics of this implementation case. Since the mineral composition of the target reservoir is very complex, it is simplified in the examples: the hydrate saturation in this area is 20%-49%, and the average value is 34.5%; the average porosity is 32%; The core sediments are mainly composed of clastic minerals, clay minerals and carbonate minerals, and the overall content is 63%, 20% and 17% respectively; the clastic mineral...

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Abstract

The invention discloses a pressing method for a methane hydrate containing rock core sample. The pressing method comprises the following steps: firstly, confirming the basic characteristics of an actual physical model; secondly, carrying out sediment compounding; thirdly, carrying out sediment pretreatment; fourthly, stirring and mixing a hydrate and the compound and pretreated sediment at low temperature; fifthly, manually pressing a rock core; finally, demoulding the pressed iron core. The pressing method has the benefit of better ensuring that the basic characteristics of the pressed methane hydrate containing rock core sample are basically consistent with those of a target reservoir.

Description

technical field [0001] The invention belongs to the technical field of petroleum and natural gas, and relates to a method for pressing rock core samples containing methane hydrate. Background technique [0002] Limited by the source of cores, the research on key physical parameters of gas hydrates (mainly including mechanics, acoustics, electricity, thermophysics, and permeability) has progressed slowly. Man-made hydrate-bearing sediment cores are one of the important means of gas hydrate simulation experiments. Sample preparation is particularly critical to carry out research on the determination of physical parameters of hydrate-containing sediments. At present, there are two main methods for preparing samples in the laboratory: in situ generation method and hybrid compression method. Different preparation methods will lead to different physical models of hydrate-containing sediments, which will lead to large differences in the measured physical parameters. There is a h...

Claims

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Application Information

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IPC IPC(8): G01N1/28
Inventor 孟庆国刘昌岭陈强胡高伟
Owner QINGDAO INST OF MARINE GEOLOGY
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