Rock physical model construction method for hydrate reservoir and processing terminal

A technology of rock physical model and construction method, which is applied in the construction method of rock physical model of hydrate reservoir and the field of processing terminal

A technology of rock physical model and construction method, which is applied in the construction method of rock physical model of hydrate reservoir and the field of processing terminal

CN111859632AActive Publication Date: 2020-10-30GUANGZHOU MARINE GEOLOGICAL SURVEY
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  • Rock physical model construction method for hydrate reservoir and processing terminal
  • Rock physical model construction method for hydrate reservoir and processing terminal
  • Rock physical model construction method for hydrate reservoir and processing terminal

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Embodiment Construction

[0029] specific implementation plan

[0030] Below, in conjunction with accompanying drawing and specific embodiment, the present invention is described further:

[0031] Before introducing the specific realization of model construction, the related background technology of geological model is introduced first. At present, it is generally believed that the underground sedimentary layer is composed of solid rocks, pores and fluids in the pores. Among them, the solid rocks include gas hydrate (referred to as hydrate, the same below), quartz and most of the mudstone, and the fluids include water and gas. The present invention is also a model construction method proposed based on the above-mentioned theory.

[0032] Such as Figure 1-Figure 4 As shown, a petrophysical model construction method for hydrate reservoirs includes the following steps:

[0033] Step 1: Generate the initial self-consistent approximate medium, which includes mudstone and hydrate, and calculate the bulk...

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Abstract

The invention relates to a rock physical model construction method for a hydrate reservoir and a processing terminal, and the method comprises the following steps: 1, generating an initial self-consistent approximate medium, and calculating the bulk modulus and shear modulus of the self-consistent approximate medium according to a formula; 2, generating a solid-phase rock, and calculating the bulkmodulus and the shear modulus of the solid-phase rock according to a formula; 3, calculating the bulk modulus and the shear modulus of the dry rock; and 4, adding a two-phase fluid to generate a rockphysical model, and calculating attenuation factor parameters of the rock physical model according to a formula. According to the method, the adaptive theory, the equivalent difference theory, the effective medium theory and the spot saturation model are fused and adopted, the rock physical model for the stratum rich in argillaceous natural gas hydrate in the sea area is established, and hydratereservoir attenuation research of a subsequent earthquake frequency band can be effectively carried out according to the rock physical model.

Description

technical field [0001] The invention relates to the technical field of natural gas hydrate exploration, in particular to a method for building a petrophysical model of a hydrate reservoir and a processing terminal. Background technique [0002] With the increase of hydrate content, it will often cause the increase of compressional wave and shear wave velocity, and also cause the change of attenuation. Therefore, the analysis of velocity dispersion and attenuation characteristics of hydrate-containing sedimentary layer is helpful estimate. The petrophysical model based on the hydrate sedimentary layer (that is, the reservoir) can analyze the velocity dispersion and attenuation characteristics of the hydrate, but the existing petrophysical model of the mud-rich and high-porosity hydrate reservoir in the sea area is not in the Studies in the seismic frequency band (low frequency, less than 500 Hz) are missing or underestimated and inaccurate. Existing studies on petrophysical...

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Application Information

Patent Timeline
30 Oct 2020
Publication
CN111859632A
IPC
G06F30/20; G01V99/00; G06F113/08; G06F119/14
CPC
G06F30/20; G06F2113/08; G06F2119/14; G01V20/00
Inventors
张如伟; 张宝金