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Shale-gas horizontal-well network crack modeling method based on microseism events

A modeling method and micro-seismic technology, applied in 3D modeling, image data processing, special data processing applications, etc., can solve the problems of cognition that does not conform to the fracture shape, poor matching, difficult to visualize fracture models, etc. Practical significance, high practicability, good effect of history matching

Inactive Publication Date: 2017-09-29
王欣 +1
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Problems solved by technology

Therefore, it is currently difficult to form a visual fracture model through conventional methods. The fracture model established by conventional methods is poorly matched with actual monitoring data, and does not conform to technicians' cognition of fracture morphology.

Method used

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  • Shale-gas horizontal-well network crack modeling method based on microseism events
  • Shale-gas horizontal-well network crack modeling method based on microseism events
  • Shale-gas horizontal-well network crack modeling method based on microseism events

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Embodiment Construction

[0047] A certain well (hereinafter referred to as Wei x‐1 well) in Weiyuan area is taken as an example below to illustrate the implementation process of the present invention.

[0048] A shale gas horizontal well network fracture modeling method based on microseismic events, such as figure 1 shown, including the following steps:

[0049]1. Prepare the data required for modeling. The required data include single well trajectory data, single well fracturing segmentation data and perforation data of Well Wei x‐1, and microseismic monitoring data of fracturing in the process of horizontal well stimulation.

[0050] The well trajectory data of a single well refers to the data describing the wellbore trajectory and azimuth such as the well deviation, azimuth, XY coordinates, and altitude depth of a single well. Data of point AB: point A refers to the point where the kickoff section of the well trajectory ends and the horizontal section begins; point B refers to the point where the...

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Abstract

The invention relates to the technical field of oil-and-gas-field geologic modeling, in particular to a shale-gas horizontal-well network crack modeling method based on microseism events. The method includes the steps that 1, data is prepared and imported; 2, a main crack model of shale-gas network cracks is established; 3, in combination with fractured microseism monitoring data, a gridding microseism-event density model and a network crack density model are generated; 4, a branch crack model of the shale-gas network cracks is established; 5, a contact crack model of the shale-gas network cracks is established; 6, the main crack model, the branch crack model and the contact crack model are combined to form a discrete crack model of shale-gas horizontal-well fractured network cracks. According to the shale-gas horizontal-well network crack modeling method based on the microseism events, by establishing the fractured crack models of different levels, the shale-gas horizontal-well complex network crack model is formed, has good fitting effects, and has relatively high practical significance to the development of shale gas.

Description

technical field [0001] The invention relates to the technical field of oil and gas field geological modeling, in particular to a method for modeling fractures in a shale gas horizontal well network based on microseismic events. Background technique [0002] The practice of oil and gas field development at home and abroad shows that for thin reservoirs, low permeability, and heavy oil reservoirs, horizontal well development is the best development method. For oil and gas reservoirs with poor formation conditions, low permeability, large seepage resistance, poor connectivity, and difficult exploitation, hydraulic fracturing is generally used for reservoir reconstruction, and artificial fractures are used to increase the permeability of oil and gas reservoirs and improve recovery. effects and economic benefits. For shale gas reservoirs, the staged fracturing technology of shale gas horizontal wells has gradually matured in recent years. In China’s Jiaoshiba, Weiyuan, Changning...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F19/00G06T17/00G06Q50/02
CPCG06Q50/02G06T17/00G16Z99/00
Inventor 王欣
Owner 王欣
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