Multi-rate flowing Wellbore electric conductivity logging method

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The flowing wellbore electric conductivity logging method involves the replacement of wellbore water by de-ionized or constant-salinity water, followed by constant pumping with rate Q, during which a series of fluid electric conductivity logs are taken. The logs can be analyzed to identify depth locations of inflow, and evaluate the transmissivity and electric conductivity (salinity) of the fluid at each inflow point. The present paper proposes the use of the method with two or more pumping rates. In particular it is recommended that the method be applied three times with pumping rates Q, Q /2, and 2Q. Then a combined ... continued below

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Tsang, Chin-Fu & Doughty, Christine April 22, 2003.

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The flowing wellbore electric conductivity logging method involves the replacement of wellbore water by de-ionized or constant-salinity water, followed by constant pumping with rate Q, during which a series of fluid electric conductivity logs are taken. The logs can be analyzed to identify depth locations of inflow, and evaluate the transmissivity and electric conductivity (salinity) of the fluid at each inflow point. The present paper proposes the use of the method with two or more pumping rates. In particular it is recommended that the method be applied three times with pumping rates Q, Q /2, and 2Q. Then a combined analysis of the multi-rate data allows an efficient means of determining transmissivity and salinity values of all inflow points along a well with a confidence measure, as well as their inherent or far-field pressure heads. The method is illustrated by a practical example.

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  • Journal Name: Water Resources Research; Journal Volume: 39; Journal Issue: 12; Other Information: Journal Publication Date: 12/2003

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  • Report No.: LBNL--52518
  • Grant Number: AC03-76SF00098
  • DOI: 10.1029/2003WR002308 | External Link
  • Office of Scientific & Technical Information Report Number: 823206
  • Archival Resource Key: ark:/67531/metadc788869

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  • April 22, 2003

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  • Dec. 3, 2015, 9:30 a.m.

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  • April 4, 2016, 4:22 p.m.

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Tsang, Chin-Fu & Doughty, Christine. Multi-rate flowing Wellbore electric conductivity logging method, article, April 22, 2003; Berkeley, California. (digital.library.unt.edu/ark:/67531/metadc788869/: accessed November 14, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.