Multi-rate flowing Wellbore electric conductivity logging method
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.
- Research Organization:
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
- Sponsoring Organization:
- USDOE Director. Office of Science. Basic Energy Sciences. Geoscience Program, Department of Energy Office of Environmental Management, Office of Science and Technology (EM-50) (US)
- DOE Contract Number:
- AC03-76SF00098
- OSTI ID:
- 823206
- Report Number(s):
- LBNL-52518; WRERAQ; R&D Project: 468111; TRN: US200415%%271
- Journal Information:
- Water Resources Research, Vol. 39, Issue 12; Other Information: Journal Publication Date: 12/2003; PBD: 22 Apr 2003; ISSN 0043-1397
- Country of Publication:
- United States
- Language:
- English
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