Interpretation of logging diagrams for shaly, gas-bearing sandstones using hand carried calculators

Journal Article · Mon Jan 01 00:00:00 EST 1979 · Log Anal.; (United States)

OSTI ID:6378966

Wu, C H; Krug, J

An appropriate program for HP-97 and HP-67 (Hewlett Packard) calculators is presented which includes a schematic of the program, instructions for use and examples of use. The program uses analytical methods for calculating the effective porosity and shaliness on the basis of relations between the value of the cubic weight of the rocks and the size of the porosity from neutron logging. With a substantive influence of hydrocarbons, the readings of GK or PS are used for introduction of the appropriate corrections. In the first stage of calculation, the porosity and shaliness are determined, and in the subsequent, the water saturation. The program is tested in the evaluation of the gas saturation of dense sandstones with low penetrability. The obtained results are in agreement with the data from interpretation according to the SARABRAND program.

• OSTI ID: 6378966
• Journal Information: Log Anal.; (United States), Vol. 20:3
• Country of Publication: United States
• Language: English

Related Subjects

03 NATURAL GAS
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
NEUTRON LOGGING
COMPUTER CALCULATIONS
DATA PROCESSING
SANDSTONES
GAS SATURATION
POROSITY
CALCULATORS
NATURAL GAS DEPOSITS
S CODES
SHALES
WATER SATURATION
COMPUTER CODES
GEOLOGIC DEPOSITS
MINERAL RESOURCES
PROCESSING
RADIOACTIVITY LOGGING
RESOURCES
ROCKS
SATURATION
SEDIMENTARY ROCKS
WELL LOGGING
030200* - Natural Gas- Reserves
Geology
& Exploration
440100 - Radiation Instrumentation