Method and system for pore pressure prediction

A technology of formation pore pressure and pressure coefficient, which is applied in the field of pore pressure prediction technology and above the domain 120, can solve the problems of delaying oilfield operations, reducing wellbore size, economic losses, etc.

Inactive Publication Date: 2009-08-19
PRAD RES & DEV LTD
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

Inserting the casing string prematurely can delay oilfield operat...

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  • Method and system for pore pressure prediction
  • Method and system for pore pressure prediction
  • Method and system for pore pressure prediction

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Embodiment Construction

[0025] Specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. For the sake of consistency, the same parts in the various figures are indicated by the same reference numerals. Also, "ST" is used to represent "step".

[0026] In the following detailed description of the embodiments of the present invention, various specific details are presented to provide a more comprehensive understanding of the present invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced without these specific details. In other instances, well known features have not been described in detail in order not to unnecessarily complicate the description.

[0027] In general, embodiments of the present invention provide methods and systems for obtaining an optimal well design. Specifically, a formation pore pressure model is generated by a formation temperature model. In one or more emb...

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Abstract

A method for performing an oilfield operation at a wellsite having a drilling rig configured to advance a drilling tool into a subsurface formation. The method includes generating a borehole temperature model for an area of interest using water depth information and a vertical stress model, generating a formation temperature model using the borehole temperature model, generating a mud-weight pressure model using the formation temperature model and pressure coefficients, generating a formation pore pressure model using the mud-weight pressure model, and adjusting the oilfield operation based on the formation pore pressure model.

Description

[0001] Cross References to Related Applications [0002] This application claims U.S. Provisional Patent Application No. 60 / 836,099, entitled "Method, Apparatus, and System for Pore Pressure Prediction from Temperature and Vertical Stress," filed August 7, 2006 in the names of Colin Michael Sayers and Lennert David den Boer Priority of the application, the entire content of which is hereby incorporated by reference, and the claimed application entitled "Method and system for pore pressure prediction" filed on August 6, 2007 in the names of Colin Michael Sayers and Lennert David den Boer ” of U.S. Nonprovisional Patent Application No. 11 / 834,554. Background technique [0003] Accurate estimation of formation pore pressure is a critical requirement for safe and economical drilling in overpressured sediments. Traditional methods of predicting pre-drilling pore pressures are based on seismic wave velocities and velocity-to-pore-pressure conversions calibrated to compensate well d...

Claims

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Application Information

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IPC IPC(8): E21B43/01
CPCE21B7/04E21B47/06E21B49/00E21B47/07
Inventor L·D·登布尔C·M·塞耶斯
Owner PRAD RES & DEV LTD
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