Document 423509

Features & Benefits

This log can provide full wave monopole and
dipole data even in unconsolidated, low
velocity formations

Deliverables can be customized depending
on the application
Operation
MPAL is combinable with other services, with
multiple conveyance methods available.
Specifications
Measure
This type of log is designed for:
 Determination of rock mechanical properties,
 Seismic data correlation, and
 Azimuthal anisotropy mapping to determine
the stress around the borehole
It is capable of obtaining an extended range
of slowness measurement: 40 – 300 µs/m
[or 131 – 984 µs/ft], and provides full acoustic
data in both open-hole or cased-hole
environments
Borehole
A p p l i c a t i on s

Tool
The MPAL is a system consisting of one
monopole transmitter, two sets of cross dipole
transmitter, and one tetra-pole transmitter along
with a total of 32 receivers. It is capable of
acquiring data in the following modes:
 Fullwave monopole—to measure AC24 & TT
 Inline dipole—to measure P-wave, S-wave
and mechanical properties Y, B, P
 Cross
dipole—to
measure
oriented
anisotropy and stress direction
 Stoneley—to measure Permeability Index
 Near borehole wavelets
Data sets of P-wave, S-wave and Stoneley wave
are directly extracted and used in geological
evaluation of the reservoir.
Length—Active
18m
Diameter
90 mm [3.54”]
Weight
< 290 kg
Max. Temperature
175⁰C
Max. Pressure
140 MPa [20 kpsi]
Min. Hole Diameter
114.3 mm [4.5”]
Max. Hole Diameter
533.4 mm [21”]
Range
131—984 μs/m ]
Accuracy
± 3.28 µs/m
Open-hole Logging
M P A L — M u l t i - P o l e A r r a y A c o u s t ic L o g