Dense sandstone reservoir outcrop porosity characterization method based on high-spectrum technology

A porosity and hyperspectral technology, applied in permeability/surface area analysis, suspension and porous material analysis, measurement devices, etc., can solve problems such as inaccuracy, limited core sampling positions, and few interpolation results of core data, etc., to achieve The effect of simple process, convenient operation and accurate data

Inactive Publication Date: 2016-06-01
CHINA UNIV OF PETROLEUM (EAST CHINA)
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Problems solved by technology

At present, the common method for characterizing the surface porosity of the outcrop is: take several cores on the surface of the outcrop, measure the porosity of the cores, and interpolate to obtain the porosity data of the entire outcrop surface. The problem of inaccurate results cannot quickly obtain macroscopic, quantitative and accurate porosity data of reservoir outcrops

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  • Dense sandstone reservoir outcrop porosity characterization method based on high-spectrum technology
  • Dense sandstone reservoir outcrop porosity characterization method based on high-spectrum technology
  • Dense sandstone reservoir outcrop porosity characterization method based on high-spectrum technology

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Embodiment

[0015] The specific process of realizing the porosity characterization of the tight sandstone reservoir outcrop in this embodiment is as follows:

[0016] 1. Field outcrop data collection and rock sample sampling

[0017] First, the Austrian rigel-vz400 was selected as the ground laser scanner to collect the three-dimensional point cloud of the outcrop surface, the scanning distance was 27 meters, and the scanning point spacing was 1mm; ExtendedVNIR, as a ground hyperspectral imager, has a spectral range of 600nm-1600nm, 213 wave bands, a data interval of 4.7nm, and an image resolution of 320×256 pixels; then sampled typical sandstones of different layers, a total of Collect 17 sandstone samples;

[0018] 2. Establish a porosity prediction model indoors

[0019] (1) Determination of porosity data:

[0020] The 17 sandstone samples collected were taken as cores, the diameter of the cores was 2.509-2.536cm, and the length was 1.324-5.963cm, and the cores were routinely clean...

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Abstract

The invention belongs to the field of application of a high-spectrum technology to oil gas fine geology, and relates to a based dense sandstone reservoir outcrop porosity characterization method based on the high-spectrum technology. The method comprises the steps of acquiring field outcrop information by utilizing a ground laser radar technology and a ground high-spectrum imaging technology; establishing a high-precision digital outcrop surface layer model; and based on the digital outcrop model, predicting the porosity by utilizing high-spectrum data to realize macroscopic characterization of dense sandstone reservoir outcrop porosity. The method has the advantages of simple process, convenience for operation and accurate data, and can quickly obtain macroscopic, quantitative and accurate porosity data of a reservoir outcrop.

Description

Technical field: [0001] The invention belongs to the application field of hyperspectral technology in fine oil and gas geology, and relates to a method for characterization of outcrop porosity of tight sandstone reservoirs based on hyperspectral technology, which has good application prospects in oil and gas exploration and development and geological applications. Background technique: [0002] The outcrop is the true description of the underground reservoir. On the basis of establishing the digital model of the outcrop, the quantitative characterization of the physical parameters of the outcrop reservoir can be used to establish a geological model of the underground reservoir more accurately and effectively. Porosity can reflect the ability of rock to store fluid, and is an important index for evaluating reservoirs. At present, the common method for characterizing the surface porosity of the outcrop is: take several cores on the surface of the outcrop, measure the porosity ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N15/08
CPCG01N15/088
Inventor 盛洁刘展曾齐红张友焱邢学文谢兴刘松张强于世勇申晋利
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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