Characterization of reservoir rocks and fluids by surface electromagnetic transient methods

• Main Authors: Hoekstra, P., Blohm, M.W. ), Stoyer, C.H. ), James, B.A. )
• Language: unknown
• Published: 2009
• Subjects: 02 PETROLEUM; ELECTROMAGNETIC SURVEYS; RESERVOIR ROCK; ALGORITHMS; DISPLACEMENT FLUIDS; ENHANCED RECOVERY; EXPERIMENTAL DATA; FINITE ELEMENT METHOD; MATHEMATICAL MODELS; MONITORING; PETROLEUM; PROGRESS REPORT; RESERVOIR FLUIDS; SITE SELECTION; THEORETICAL DATA; TWO-DIMENSIONAL CALCULATIONS; DATA; DOCUMENT TYPES; ELECTRICAL SURVEYS; ENERGY SOURCES; FLUIDS; FOSSIL FUELS; FUELS; GEOPHYSICAL SURVEYS; INFORMATION; MATHEMATICAL LOGIC; NUMERICAL DATA; NUMERICAL SOLUTION; SURVEYS; permafrost
• Online Access: http://www.osti.gov/servlets/purl/7296641; https://www.osti.gov/biblio/7296641; https://doi.org/10.2172/7296641

The objectives of this research are to improve the interpretations of transient electromagnetic (TEM) measurements over two-dimensional subsurface structures. TEM is a surface electromagnetic method employed in fossil energy reservoir exploration and characterization. Electrical measurements find application in (i) assisting in fossil energy exploration mainly in areas where seismic methods yield inadequate data quality, such as volcanic covered terrain, permafrost areas, and the Rocky Mountain overthrust; (ii) mapping contacts between hydrocarbon and brines in shallow producing horizons, and (iii) in monitoring enhanced oil recovery processes which cause zones of lower resistivity. Accomplishments for this past year are presented for the following tasks: (1) site selection and acquisition of high density, 3-component TEM data set over test site; (2) finite element forward modeling; and (3) TEM 2-D subsurface imaging.