Measurements in deep boreholes
Under deep boreholes we understand boreholes from approx. 300 m.
An important business field of BLM GmbH is the surveying of deep wells drilled for the purpose of exploration, development of deposits or monitoring of underground geological or hydrodynamic conditions.
Concrete economic objectives are currently mostly the extraction of solid mineral resources (salts and ores) and thermal waters (geothermal energy) from greater depths.
An important business field of BLM GmbH is the surveying of deep wells drilled for the purpose of exploration, development of deposits or monitoring of underground geological or hydrodynamic conditions.
Concrete economic objectives are currently mostly the extraction of solid mineral resources (salts and ores) and thermal waters (geothermal energy) from greater depths.
BLM GmbH offers the following services for the execution of the measurements:
- Statements on the state of the borehole
- Lithological classification of the drilled rock
- Determination of joint boundaries in the rock
- Detection and quantification of inflows
- Evaluation of technical installations within wells, borehole integrity
Our equipment
The available equipment of BLM GmbH includes the following methods:
Caliper measurement
CAL-4, CAL-6
Gamma Ray Log
GR
Magnet log
MAL
Resistance measurements
focused [FEL] or inductive [IL], small/large resistivity standards [EL-KN/EL-GN]
Photoelectric Density
PDT
Segmented Cement Bond Log
SCBL (16 segments)
Milieu parameters
MIL: pH, redox, O2
Liquid density
FD
Multifinger
MFC-24, MFC-40
Spectral Gamma Ray Log
SGR
Density Log
GG.D
Imaging methods
camera inspection [TV], acoustic scanner [ABF], optical scanner [OPTV].
Pulsed Neutron Gamm
ING
Acoustic wall thickness scanner
ACI
Flowmeter
FLOW
Casing Collar Locator
CCL
Borehole deviation
BA
Neutron Log
NN
Electromagnetic wall thickness measurement / defectoscopy
EMDS (up to 600 mm pipe diameter)
Full Wave Sonic / Cement Bond Log
EWS / CBL
Conductivity / temperature of the fluid
SAL / TEMP
Turbidity log
FMT
Geotechnics
With consideration of further measuring methods a complex evaluation of the existing
rock is possible
read more
Shallow wells
The investigation of these boreholes, which primarily serve exploration targets in the
field of hydrogeology and water management
read more
Under pressure
“Under pressure” refers to the condition that there is gas overpressure in the riser of
production probe installations or that water wells are highly artesian.
read more
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