PERMFILE52709

• Permit No: M1999002
• IBM Index Class Name: Permit File
• Doc Date: 6/18/1999
• Doc Name: OBJECTORS EXHIBITS
• Media Type: D
• Archive: No

•
A sketch of a Cement Bond tool is portrayed on the left side of Fig. 16. The signal indicated
in "A" is that of free pipe with the total [ravel rime for five and one-half-inch casing and showing
the width and posi[ion of the electronic gate. "B" is a signal where formation transit time greater
than pipe time is experienced. The casing to cement and cement to formation bond is good quality
resulting in the signal taking on the transit time of the formation. 'C" represents a signal where
formation transit lime is less than pipe. The resultant is a transit time slightly lower than pipe
with low amplitude. "D" indicates [he signal resulting from formation transi[ time considerably
less than pipe. The resultant is a transit time much lower [han pipe time and the amplitude of the
sinusoidal wave coming under the electronic gate indicates high amplitude. Here, there at first
appears to be conflicting information for the interpretation of the Cement Bond log. Experience,
however, has shown chat a good cement bond does exist when these conditions are indicated by the
log.
PIPE BONDED
TO IgLMA710N TILWSn 71ME (MICROSECONDS)
i
F',ure to
O
O
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An example of a Gamma Ray-Neutron and Cement Bond Log are presen[ed in Fig. 17. Curve
N 1 is a Gamma Ray, A 2 a Casing Collar Locator, and =.' 3 a Neutron tog. Curve N 4 is the Transi[
Time Curve in microseconds per foot. The dotted line is transit time for ten and three-fourth-
inch casing. In the poor bond section the recorded transit time is very close to pipe time. The
casing collars are apparent in the poor bond section. Curve a 5 represents [he amplitude recorded
under the electronic gate. Note the casing collars indicated at 2, 074, 2, 115, and 2, 134 feet in the
poor bond section.
One of the logs used in the oil and gas industry that has not, up to this time, been used in the
solution brine well industry is the Salinometer Log. The log shows a continuous recording of the
mud resistivity in the well bore. Measurements are made on the inside of the tool where only the
mud resistivity can influence the reading of [he four electrodes. The product is the mud resistiv-
ity in values of ohms per me[er cubed.
An example of the use of the Salinometer Log is shown in Fig. 18. These logs were taken
for the Atomic Energy Commission under field supervision of Fenix & Scisson at the request of
United States Geological Survey for use in geological and hydrological interpretation as part of
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