Formation evaluation using measurements recorded while drilling
Conference
·
OSTI ID:6605539
Two of the measurements recorded while drilling (MWD), gamma ray and resistivity, are traditionally formation evaluation measurements. However, their primary user thus far has been the drilling engineer. The authors believe that MWD will have increasing importance in formation evaluation, and that a good understanding of MWD resistivity and gamma ray logs will be needed by the log analyst. MWD gamma ray and resistivity logs are similar to their wireline counterparts, but there are significant differences. The differences stem from different invasion (or lack of invasion) development for MWD as opposed to open hole wireline; drill collar influence on both the resistivity and gamma ray (GR) measurements - this influence is both positive and negative; and logging speed (drilling rate for MWD) is much slower for MWD and can vary erratically. The MWD logs presented in this paper demonstrate the value of using MWD logs. Emphasis is placed on both the qualitative and quantitative techniques available to the log analyst to help him get maximum benefit from the MWD logs.
- Research Organization:
- NL Technology Systems - MWD, NL Industries, Inc.
- OSTI ID:
- 6605539
- Report Number(s):
- CONF-8406110-
- Country of Publication:
- United States
- Language:
- English
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·
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·
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Related Subjects
02 PETROLEUM
020200* -- Petroleum-- Reserves
Geology
& Exploration
03 NATURAL GAS
030200 -- Natural Gas-- Reserves
Geology
& Exploration
440400 -- Well Logging Instrumentation
47 OTHER INSTRUMENTATION
ACTINIDES
ALKALI METALS
ALLOYS
COMPARATIVE EVALUATIONS
DRILLING EQUIPMENT
DRILLS
ELECTRIC LOGGING
ELECTROMAGNETIC RADIATION
ELEMENTS
EQUIPMENT
EXPLORATION
FREQUENCY RANGE
FUNCTIONS
GAMMA LOGGING
GEOLOGIC DEPOSITS
GEOPHYSICS
IRON ALLOYS
IRON BASE ALLOYS
MEASURING METHODS
METALS
MHZ RANGE
MHZ RANGE 01-100
MINERAL RESOURCES
MWD SYSTEMS
NATURAL GAS DEPOSITS
PERFORMANCE
PETROLEUM DEPOSITS
POTASSIUM
RADIATIONS
RADIOACTIVITY LOGGING
RESERVOIR ROCK
RESISTIVITY LOGGING
RESOURCES
RESPONSE FUNCTIONS
SLEEVES
STEELS
THORIUM
URANIUM
WELL LOGGING
020200* -- Petroleum-- Reserves
Geology
& Exploration
03 NATURAL GAS
030200 -- Natural Gas-- Reserves
Geology
& Exploration
440400 -- Well Logging Instrumentation
47 OTHER INSTRUMENTATION
ACTINIDES
ALKALI METALS
ALLOYS
COMPARATIVE EVALUATIONS
DRILLING EQUIPMENT
DRILLS
ELECTRIC LOGGING
ELECTROMAGNETIC RADIATION
ELEMENTS
EQUIPMENT
EXPLORATION
FREQUENCY RANGE
FUNCTIONS
GAMMA LOGGING
GEOLOGIC DEPOSITS
GEOPHYSICS
IRON ALLOYS
IRON BASE ALLOYS
MEASURING METHODS
METALS
MHZ RANGE
MHZ RANGE 01-100
MINERAL RESOURCES
MWD SYSTEMS
NATURAL GAS DEPOSITS
PERFORMANCE
PETROLEUM DEPOSITS
POTASSIUM
RADIATIONS
RADIOACTIVITY LOGGING
RESERVOIR ROCK
RESISTIVITY LOGGING
RESOURCES
RESPONSE FUNCTIONS
SLEEVES
STEELS
THORIUM
URANIUM
WELL LOGGING