Methods and apparatus to characterize stock-tank oil during fluid composition analysis

A technology for degassing crude oil and fluids, applied in earthwork drilling, wellbore/well components, construction, etc., which can solve problems such as maintaining state and difficult samples

Inactive Publication Date: 2008-07-30
PRAD RES & DEV LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In fact, when it is retrieved and / or moved to the surface, it is very difficult to keep the sample in the same state as it was downhole

Method used

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  • Methods and apparatus to characterize stock-tank oil during fluid composition analysis
  • Methods and apparatus to characterize stock-tank oil during fluid composition analysis
  • Methods and apparatus to characterize stock-tank oil during fluid composition analysis

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Embodiment Construction

[0036] As described in more detail below, by using such as the Schlumberger ModularFormation Dynamics Tester (MDT TM ) sampling tool to make determinations about hydrocarbon-bearing geological formations. To facilitate compositional analysis of collected fluids, the sample means may enable and / or include measuring and / or utilizing the absorption of light at one or more wavelengths of interest (e.g., in the visible and / or near infrared (NIR) That is, the optical density) module. The collection of optical densities for one or more wavelengths of interest is often referred to as an "absorption spectrum." Example modules include, but are not limited to, the Schlumberger Optical Fluid Analyzer (OFA TM ), Schlumberger LiveFluid Analyzer (LFA TM ), and / or Schlumberger Composition FluidAnalyzer (CFA TM). Details of example sampling tools and / or example sampling fluid analyzers can be found in commonly owned U.S. Patent Nos. 3,859,851 to Urbanosky, 4,860,581 and 4,936,139 to Zimme...

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Abstract

Methods and apparatus to characterize stock-tank oil during fluid composition analysis are disclosed. A disclosed example method to characterize a fluid associated with an underground geological formation comprises obtaining a sample of the fluid associated with the underground geological formation, determining, in a borehole associated with the underground geological formation, a stock-tank oil type for the sample of the fluid associated with the underground geological formation, and determining a property of the fluid associated with the underground geological formation based on the stock-tank oil type.

Description

[0001] References to related applications [0002] This patent claims priority to U.S. Provisional Application Serial No. 60 / 886,400, filed January 24, 2007, entitled "Characterize Stock Tank Oil Using Optical Signals to Improve Downhole Fluid Composition Analysis," and is hereby incorporated by reference in its entirety here. technical field [0003] The present disclosure relates generally to methods and apparatus for determining hydrocarbon-bearing geological formations, and more particularly to methods and apparatus for characterizing surface degassed crude oil during fluid composition analysis. Background technique [0004] Mine wells are typically drilled into the surface to discover natural deposits of hydrocarbons and / or other desired materials trapped in geological formations in the Earth's crust. Using drilling equipment on the earth's surface, mine shafts are drilled into the surface and / or directed at targeted geological locations and / or geological formations. ...

Claims

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Application Information

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IPC IPC(8): E21B49/08
CPCE21B47/113E21B49/087
Inventor 董成利彼特·S·亨格曼
Owner PRAD RES & DEV LTD
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