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Methods for Analyzing Seismic Data

A microseismic and geological structure technology, applied in seismology, seismic signal processing, geophysical measurement, etc., can solve problems such as fracturing mechanics model fitting

Inactive Publication Date: 2018-12-04
WESTERNGECO SEISMIC HLDG LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, it seems impossible to fit the fracture mechanics model to real world data

Method used

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  • Methods for Analyzing Seismic Data
  • Methods for Analyzing Seismic Data
  • Methods for Analyzing Seismic Data

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Embodiment Construction

[0050] The following description provides preferred exemplary embodiments only and is not intended to limit the scope, applicability or configuration of the invention. Rather, the following description of the preferred exemplary embodiment will provide those skilled in the art with an enabling description for implementing the preferred exemplary embodiment of the invention. It being understood that various changes may be made in the function and arrangement of elements without departing from the spirit and scope of the invention as set forth in the appended claims.

[0051] In the following description specific details are given to provide a thorough understanding of the embodiments. However, it will be understood by those of ordinary skill in the art that the described embodiments may be practiced without these specific details. For example, circuits may be shown in block diagrams in order not to obscure the embodiments in unnecessary detail. In other instances, well-known ...

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Abstract

The present invention provides a method of analyzing measured microseismic events obtained from monitoring induced hydraulic fracturing of a subterranean geological formation, said method involving (a) knowledge based on material properties requiring said geology, starting points, and fitting A fracture propagation model that assumes at least two measured microseismic events for the fracture trajectory, assuming the locations of evolving planar fractures with temporal and spatial trajectories; (b) assessing whether the additional measured microseismic events are close enough to be considered as the said temporal and spatial trajectory of said propagating portion of said fracture occurring; (c) determining whether said putative fracture trajectory is statistically significant by comparing the number of sufficiently close microseismic events to a statistical baseline number; (d ) repeating steps (a) to (c) as necessary until at least one plausible fracturing plane consistent with said measured event is found.

Description

technical field [0001] Embodiments of the invention relate to methods of analyzing microseismic data obtained from monitoring induced hydraulic fracturing of subterranean oilfield geological formations. Background technique [0002] Hydraulic Fracture Monitoring ("HFM") is used in subsurface oil and gas wellbores to provide (among other things) an understanding of the geometry of hydraulic fractures, enabling better completion design, reliable production forecasts and real-time operational decisions. [0003] Hydraulic fracturing involves the injection of fluids into geological formations with the purpose of inducing fractures in the formation. These fractures tend to propagate in vertical planes due to the arrangement of stresses in these subterranean locations. Fluid-formation interaction can induce the propagation of fractures in the formation, resulting in microseismic activity. However, measured microseismic data can contain a large degree of dispersion and uncertain...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01V1/28G01V1/30
CPCG01V1/288G01V1/301G01V2210/1234G01V2210/646G01V2210/65G01V1/282G01V1/30
Inventor M·J·威廉姆斯
Owner WESTERNGECO SEISMIC HLDG LTD