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A three-dimensional modeling method of reservoir fractures,

A technology of three-dimensional modeling and cracks, which is applied in special data processing applications, instruments, electrical digital data processing, etc., can solve the problem of low accuracy and reliability of small-scale fracture models, lack of guidance on small-scale fracture distribution models, and inability to meet small-scale fracture models. Scale crack model accuracy requirements and other issues, to achieve the effect of meeting the accuracy requirements, high accuracy and reliability

Active Publication Date: 2019-02-26
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology

However, the main disadvantage of the existing medium- and small-scale fracture modeling methods is that there is a lack of guidance on the distribution model of small-scale fractures in the modeling process, which generally differs greatly from the actual geological laws of small-scale fracture distribution, resulting in the accuracy and reliability of the small-scale fracture model. The precision of the small-scale fracture model is not high enough to meet the accuracy requirements of the fine-scale development decision-making process of oil and gas reservoirs

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  • A three-dimensional modeling method of reservoir fractures,
  • A three-dimensional modeling method of reservoir fractures,
  • A three-dimensional modeling method of reservoir fractures,

Examples

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specific Embodiment

[0050] In this embodiment, a well group in block Z of an onshore oilfield in my country is taken as an example to establish a three-dimensional geological model of small-sized fractures in the target interval of a single well. The reservoirs of Group H, the main production layer in Block Z, are shallow water delta facies, with an average porosity of less than 12%. The average permeability is less than 3.2mD (milli-Darcy), which is a low-porosity and ultra-low-permeability reservoir. The reservoir 1 of Group H, the main production layer in Block Z, mainly develops near S-N (north-south) direction, and a small amount of near E-W (east-west) direction. Small size cracks. This example takes natural small-sized fractures near the S-N direction in this area as an example to illustrate the practical application of the three-dimensional modeling method for reservoir fractures based on multi-point geostatistics in this area, including the following steps:

[0051] According to the geo...

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Abstract

The invention discloses a three-dimensional modeling method of reservoir fractures, which is characterized in that the method comprises the following steps: establishing an isochronous stratigraphic framework model of a hydrocarbon reservoir, a sedimentary microfacies model and a lithofacies model; Identify and describe the geological parameters of small and medium-scale fractures in the target reservoir, and classify the small-scale fractures in the target reservoir according to the formation mechanism of small-scale fractures. The geological parameters of all kinds of small-scale fractures in the target reservoir are counted to obtain the distribution characteristics of the geological parameters of all kinds of small-scale fractures and to determine the main controlling factors of the development of all kinds of small-scale fractures. Establish three-dimensional distribution model of various rock mechanics layers; According to the three-dimensional distribution model of various rockmechanics layers, Combined with the training images corresponding to the distribution of various small-scale fractures, the 3D geological model of various small-scale fractures is established by usingmulti-point geostatistical method, taking the well-point fracture data of each single well target interval as hard data and the prediction results of the plane distribution trend of various small-scale fractures as constraint conditions.

Description

technical field [0001] The invention relates to a three-dimensional modeling method for reservoir fractures, belonging to the field of oil and gas geological exploration and development. Background technique [0002] The method and application of reservoir structural fracture evaluation have always been one of the important links in the process of oil and gas field exploration and development. From the perspective of oil and gas field development, the research on the characteristics of reservoir structural fractures is an important means to increase oil recovery and improve development effects. Therefore, in the process of exploration and development of fossil energy, the study of reservoir structural fractures is very important. Reservoir structural fractures can be roughly divided into the following three categories according to their scale levels: large-scale fractures, small-scale fractures and micro-fractures. The length scale of large-scale fractures is generally at ...

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/20G06F2119/06
Inventor 赵向原胡向阳张文彪
Owner CHINA PETROLEUM & CHEM CORP
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