The application of finite difference methods to normal resistivity logs

Conference · Sun Jan 01 04:00:00 EST 1984

OSTI ID:6622830

Yuratich, M A; Meger, W J

Measurements made using a multiple=spaced normal resistivity tool should be capable of yielding a resistivity profile defining the extent and nature of the invaded zone as well as giving accurate values for Rt. This paper outlines the development of a suitable tool, a digital data transmission system, and the mathematical analysis used to extract the required information. A modelling technique based on finite difference analysis is used to predict the borehole measurements in any given section of formation, taking into account both vertical and radial variations of resistivity. Optimisation techniques are then employed which operate on the model by varying resistivity profiles until the prediction agrees with the measured values. Alternative strategies, and the practical problems involved in their implementation in computer software, will also be discussed.

• Research Organization: Tesel PLC, Basingstoke, Hants
• OSTI ID: 6622830
• Report Number(s): CONF-8406110-
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020200* -- Petroleum-- Reserves
Geology
& Exploration
03 NATURAL GAS
030200 -- Natural Gas-- Reserves
Geology
& Exploration
99 GENERAL AND MISCELLANEOUS
990220 -- Computers
Computerized Models
& Computer Programs-- (1987-1989)
COMPUTER CODES
COMPUTERIZED SIMULATION
DATA TRANSMISSION SYSTEMS
DIGITAL SYSTEMS
ELECTRIC CONDUCTIVITY
ELECTRIC LOGGING
ELECTRICAL PROPERTIES
EQUIPMENT
EXPLORATION
FINITE DIFFERENCE METHOD
GEOLOGIC DEPOSITS
GEOLOGIC MODELS
GEOPHYSICS
ITERATIVE METHODS
MINERAL RESOURCES
NATURAL GAS DEPOSITS
NUMERICAL SOLUTION
PETROLEUM DEPOSITS
PHYSICAL PROPERTIES
RESERVOIR ROCK
RESISTIVITY LOGGING
RESOURCES
SIMULATION
WELL LOGGING
WELL LOGGING EQUIPMENT