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Title: Determining the True Residence Time Distribution Curve of Phase I System

Previous engineering analysis of the Br82 tracer experiments failed to account for the fact that the fluid was being recirculated during these tests. Thus, the concentration vs. volume curves shown in the Run Segments 4 and 5 reports and elsewhere are not really the response of the system to a pulse of tracer. These data are complicated by the fact that at later times most of the tracer being measured was not the original pulse, but the tracer on its second or third pass through the reservoir. When this recirculation effect is subtracted out of the original concentration vs. volume curves, the true residence time distribution (RTD) for the Phase I system indicates that the "long tail" on these curves is not caused by dispersion but results almost entirely from recirculation. The RTD curve for this system cannot be modeled precisely using a one parameter model, but can probably be described by a combination of hydrodynamic and turbulent dispersion in a single fracture. Alternatively, flow through multiple fractures could easily result in the RTD curves determined during Run Segments 4 and 5.
Authors:
 [1]
  1. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Publication Date:
OSTI Identifier:
1241595
Report Number(s):
LA-UR--15-28998-03
DOE Contract Number:
AC52-06NA25396
Resource Type:
Technical Report
Research Org:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
02 PETROLEUM; 97 MATHEMATICS AND COMPUTING Energy Sciences