Method and system for correlating survey logs with predictive logs

A technology of measuring well logging and well logging, applied in the field of methods and systems, capable of solving problems such as non-economic feasibility

Inactive Publication Date: 2016-10-19
LANDMARK GRAPHICS CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

outside the target zone, although some oil and gas extraction is possible, such extraction is not economically viable in most cases

Method used

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  • Method and system for correlating survey logs with predictive logs
  • Method and system for correlating survey logs with predictive logs
  • Method and system for correlating survey logs with predictive logs

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Embodiment Construction

[0016] Symbols and Terminology

[0017] Certain terms are used throughout the following description and claims to refer to particular system components. Those skilled in the art will appreciate that oilfield service companies may refer to components by different names. This document does not intend to distinguish between components that differ in name but not function. In the following discussion, as well as in the claims, the terms "comprises" and "comprises" are used in an open-ended manner and should therefore be interpreted to mean "including, but not limited to...". Also, the terms "coupled" or "connected" are intended to mean either an indirect or direct connection. Thus, if a first device couples to a second device, that connection may be through a direct connection or through an indirect electrical connection.

[0018] "Measured log" shall mean a series of values ​​each representing a measured parameter of the formation at a location along the borehole. The survey ...

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PUM

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Abstract

Correlating measured logs with predictive logs. At least some illustrative embodiments are methods comprising: plotting values ​​of the survey log relative to a vertical axis and a horizontal axis and plotted in a first pane; plotting relative to the vertical axis and the horizontal axis displaying the value of the predictive log; selecting an inflection point of the predictive log; moving the horizontal position of the inflection point relative to the measured log in response to a pointing device; changing the structure based on the relative position of the inflection point model the inclination of at least one modeled surface; recalculate the predictive log based on the change in inclination, and the recalculation creates a revised predictive log; and then plot the revised predictive log. In some cases, the method may also include adding a fixed X, Y, Z point to the at least one modeled surface based on the position of the inflection point.

Description

technical field [0001] The present application relates to the field of well logging, in particular to a method and system for correlating measurement logging and predictive logging. Background technique [0002] Advances in horizontal drilling have increased the ability to economically extract hydrocarbons from hydrocarbon-bearing formations. However, the placement of horizontal boreholes (also known as laterals) requires special precision. For example, shale formations may be thousands of feet below the surface, and the shale formations themselves may be approximately 1000 feet thick. Of the exemplary 1000-foot thickness, only a few relatively thin zones (each on the order of tens of feet thick) would be suitable locations (ie, target zones) to place lateral wells and extract hydrocarbons. Outside the target zone, while some hydrocarbon extraction is possible, such extraction is not economically viable in most cases. [0003] In addition, physical phenomena such as fault...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B47/09E21B7/04G01V11/00
CPCG01V11/00E21B47/09E21B7/046G06T17/05
Inventor 威廉·C·罗斯理查德·J·兰根瓦尔特
Owner LANDMARK GRAPHICS CORP
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