Method and equipment for underground characteristics of stratum fluid

A characterization, fluid technology that can be used in earth-moving drilling, wellbore/well components, etc., to solve problems such as difficulties

Inactive Publication Date: 2009-10-28
PRAD RES & DEV LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In fact, it is difficult to maintain the sample in the state it was in downhole when the sample was taken to the surface

Method used

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  • Method and equipment for underground characteristics of stratum fluid
  • Method and equipment for underground characteristics of stratum fluid
  • Method and equipment for underground characteristics of stratum fluid

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Embodiment Construction

[0026] As described in more detail below, in-situ determinations regarding hydrocarbon-bearing geological formations are made through the use of sampling tools such as the Schlumberger Modular Dynamic Formation Tester (MDT). The downhole data obtained with the sampling tool is used to perform a compositional analysis of the reservoir fluid, and the compositional analysis of the reservoir fluid involves a model of the thermodynamic behavior of the fluid; that is, the mass fractions of the fluid components are determined by Used as input to the Equation of State (EOS) to predict the phase state of the fluid. Fluid production parameters, transport properties, and commercially useful indicators of the reservoir fluid are calculated for the reservoir fluid characterized with respect to the thermodynamic behavior of the reservoir fluid. For example, the thermodynamic model can provide a phase envelope that can be used to iteratively vary the collection rate of the sample in order to...

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Abstract

The invention discloses a method and equipment for detecting a hydrocarbon-containing geological stratum by passing through a well hole, in particular to a characteristic instantiation method for obtaining a fluid sample correlated to an underground geological stratum from fluid correlated to the underground geological stratum. In the characteristic instantiation method, the chemical composition and the thermal physical property of the fluid sample are measured in the well hole correlated to the underground geological stratum, a mathematical model which expresses the fluid sample is selected on the basis of at least one of the chemical composition or the thermal physical property, a parameter of the mathematical model is regulated on the basis of at least one of the chemical composition or the thermal physical property to generate a regulated mathematical model, and then the property of the fluid correlated to the underground geological stratum is determined on the basis of the regulated mathematical model.

Description

[0001] related application [0002] This application is a continuation-in-part of U.S. Application No. 11 / 388,274, filed March 24, 2006, which is a continuation-in-part of U.S. Application No. 10 / 309,849, filed December 3, 2002 (currently issued as US Patent No. 7,081,615), the disclosures of all of the above documents are hereby incorporated by reference in their entirety. [0003] This application is also related to commonly owned U.S. Patent Nos. 6,465,775 to G. Fujisawa, et al., entitled "Method for Chemical Composition Analysis in a Downhole Environment" and to O. Mullins et al., entitled "Method and Apparatus for the Downhole Compositional Analysis of Formation Gases", co-owned U.S. Patent No. 5,859,430, both of which are hereby incorporated by reference in their entirety. technical field [0004] The present invention generally relates to methods and apparatus for in situ determinations with respect to in situ determinations of hydrocarbon-bearing geological formations...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B49/08
Inventor 安东尼·罗伯特·霍尔摩斯·古德温彼得·S·亨格曼许凯董成利
Owner PRAD RES & DEV LTD
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