Fracture monitoring and characterisation

A fissure and surface technology, applied in measuring devices, geophysical surveys, seismology for logging records, etc., can solve problems such as increasing signal attenuation

Inactive Publication Date: 2015-03-18
PRAD RES & DEV LTD
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

At the same time, however, terrestrial and/or shallow arrays are susceptible to increased ...

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  • Fracture monitoring and characterisation
  • Fracture monitoring and characterisation
  • Fracture monitoring and characterisation

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Embodiment Construction

[0040] Specific details are given in the following description to provide a thorough understanding of the embodiments. However, one of ordinary skill in the art would understand that the embodiments may be practiced without these specific details. For example, well-known circuits, procedures, algorithms, structures and techniques may be shown without unnecessary detail in order not to obscure the embodiments.

[0041] Also, note that embodiments may be described as processes that are depicted as flowcharts, flow diagrams, dataflow diagrams, structure diagrams, or block diagrams. Although a flowchart may describe operations as a sequential process, many operations may be performed in parallel or simultaneously. Additionally, the order of operations can be rearranged. A process terminates when its operations are complete, but the process may have additional steps not included in the figures. A procedure may correspond to a method, function, procedure, subroutine, subroutine, ...

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Abstract

Hydraulic fracturing conditions intended to induce tensile crack opening or compressional crack closure of a fracture responsible for a microseismic event in the Earth formation are selected 210 and a hydraulic fracturing operation is performed using the selected conditions to cause tensile crack opening or compressional crack closure of the fracture responsible for a microseismic event in the Earth formation 220. Induced motion data from the microseismic event is received 230 using a plurality of receivers, and the received data is analysed 250 to track the development of the fracture responsible for the microseismic event and/or to track a proppant distribution within the fracture. Another aspect relates to characterising fracture networks wherein the microseismic event is represented in the model that relates induced motion to the event by a moment tensor that only has two types of component and wherein the two types of component are double couple components and tensile or compressional crack components.

Description

Background technique [0001] The present disclosure relates generally to the monitoring of fracturing operations, and to the characterization of fracture networks in Earth formations. [0002] Characterization of subsurface formations is important for identifying, accessing, and managing reservoirs. For example, the depth and orientation of such formations can be determined through seismic surveys. This is typically performed by delivering energy to the surface at one or more seismic source locations, eg, by controlled explosions, mechanical input, or the like. The returned energy is then measured at ground receiver locations at various distances and azimuths from the source location. The travel time of energy from the source to the receiver, via reflection and refraction from the interface of the subsurface formation, indicates the depth and orientation of the formation. [0003] Microseismic measurements can be described as deformations of earthquakes. In traditional seis...

Claims

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Application Information

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IPC IPC(8): G01V1/28G01V1/24
CPCG01V2210/646E21B43/26G01V2210/123G01V1/288G01V2210/1234G01V1/40E21B49/00E21B43/267G01V1/282G01V1/30
Inventor A·金J·德罗什I·布拉德福德
Owner PRAD RES & DEV LTD
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