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Fault analysis system

A technology for analyzing systems and faults, applied in seismic signal processing, geophysical measurement, instruments, etc., can solve problems such as well abandonment, expensive drilling mud loss, and circulation loss

Inactive Publication Date: 2012-03-07
ROCK DEFORMATION RES
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  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

Open and permeable faults in established reservoirs can cause severe circulation losses during drilling operations
Loss of drilling mud can be costly and dangerous and can lead to well abandonment

Method used

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Examples

Experimental program
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Embodiment Construction

[0068] figure 1 An overview 1 of the system according to the invention is shown. Input data 3 from one or more wells is provided; this may include well log data such as Vshale and Vclay as well as data identifying the geometry of reservoir units, top seals and traps. The data is processed 5 to create data files that build stratigraphic scenarios and calculate fault rock properties with defined uncertainties. The data volumes are prisms displaying data on depth, drop and formation variations. Multiple data volumes can be created by varying the input variables and applying different mathematical and statistical algorithms to the input data.

[0069] The fault plane properties viewer 7 provides a physical mapping of the data volume across the fault geometry. In other words, use maps of actual faults to interrogate data volumes by defining data consistent with the physical location of faults.

[0070] figure 2 The Graphical User Interface (GUI) of the system according to the...

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Abstract

A fault seal analysis system with a data input which receives data pertaining to one or more physical parameters of a rock stratigraphy at or near a fault and means for analysing the data by applying one or more algorithm to create a model of the geometry and physical properties of the rock at or near the fault, the analysis means further comprising a user input which allows a user to vary input parameters of the one or more algorithm and creating one or more data volume or model of the geometric and physical parameters. The analysed data is represented on a fault plane property viewer having at least one fault property diagram of a fault and a software module adapted to interrogate the data volume to map data from the data volume onto the diagram to show the sealing properties of the fault.

Description

technical field [0001] The present invention relates to a fault analysis system for determining the characteristics of geological faults, especially geological faults associated with fluid reservoirs, such as oil and gas reservoirs. Background technique [0002] Geological faults associated with fluid reservoirs can act as transmitters or barriers to fluid flow and pressure transmission by keeping hydrocarbons in the reservoir or providing pathways for hydrocarbons to flow out of the reservoir. [0003] Sealing faults are the primary controls on traps in many hydrocarbon reservoirs, but they can also convert larger and continuous hydrocarbon reservoirs into multiple compartments that appear as a collection of smaller reservoirs. A seal fault occurs if the fault intersects different lithologies and places the permeable reservoir quality rock relative to the less permeable rock. [0004] Fault seals can also form where a fault occurs in a single lithology and the rock that fo...

Claims

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Application Information

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IPC IPC(8): G01V1/30G01V11/00
CPCG01V1/50
Inventor S·R·弗里曼S·D·哈里斯R·J·奈普
Owner ROCK DEFORMATION RES
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