Shallow boreholes are boreholes up to approx. 300 m.

The investigation of these boreholes, which primarily serve exploration targets in the field of hydrogeology and water management, also comprises an equally important business area. In addition to logging work, in connection with exploration measures, borehole geophysics has gained considerably in importance in recent years with regard to environmental protection tasks. Thus, geological and hydraulic borehole investigations support the preliminary investigation and planning of contaminated site remediation.

The concrete tasks within the above mentioned business field usually result from the specific requirements of the industry sector and require a high flexibility in the use of measuring equipment in order to be able to respond to the problem at any time in a targeted manner.
The individual measurement methods can be combined according to the tasks in hand in such a way that a comprehensive and reliable evaluation of the respective object (borehole, water well, measuring point, etc.) can be carried out.

BLM GmbH can offer the use of a range of methods, whereby they can be used optionally in an open hole or also in a developed cased hole, measuring points and similar structures.

Our methods:

  • Caliper (CAL-3 or CAL-4)
  • Casing Collar Locator (CCL)
  • Gamma Ray Log (GR)
  • Spectral Gamma Ray Log (SGR)
  • Resistivity measurements (focused [FEL] or inductive [IL], small/large resistivity standards [EL-KN/EL-GN])
  • Borehole deviation (BA)
  • Magnet log (MAL)
  • Density Log (GG.D)
  • Neutron Log (NN)
  • Photoelectric Density (PDT)
  • Imaging methods (camera inspections [TV], acoustic scanners [ABF], optical scanners [OPTV])
  • Full Wave Sonic / Cement Bond Log (FWS / CBL)
  • Conductivity / temperature of the fluid (SAL/TEMP)
  • Milieu parameters (MIL: pH, redox, O2)
  • Flowmeter (FLOW)
  • Turbidity Log (FMT)
  • Liquid density (FD)

Other measurement methods