PT GEOSERVICES offers geological services covering a wide range of geological investigative survey at various map scales and well site geologist, in accordance with the geology and mining exploration objectives.

The objectives of geological mapping are to determine the location, attitude, and extend of the coal bearing strata, if not of the coal seams themselves, and the relation of these beds to other rock units in the area. Field mapping can also be used to reveal the nature and location of any igneous intrusions, faults, or other features that may affect seam continuity and mining condition. The geological investigation and research start with an initial geological reconnaissance stage and extend to the most advanced stage of mineral, fuel and solid fuel resources/reserves exploration study.

Field work may include measurement of stratigraphic section and sedimentologic features, tectonic structures and sampling (by pitting or augering if necessary) of rocks or other material for a variety of purposes: biostratigraphy, sedimentology, hard-rock and sedimentary petrography, petroleum or mineral geochemistry, geophysical properties, coal testing, geohydrology and geotechnics.

Our geologists have worked extensively in the resource industry with both small and large mining companies. We offer a strong background in natural resources such as metallic mineral, industrial mineral, coal and coal bed methane, and oil and gas exploration projects. Project work has included detailed diamond drilling, surface and underground mapping, project research, data assessment, ore deposit modeling and resource estimation, and assessment of large scale open pit mining plans. Our professional team has extensive experience with Surpac block modeling of Resources and Reserves, including specific experience with data validation, quality assurance and quality control, and technical reporting to Directorate General Mining of Public, Department of Mining and Energy standards.

Geological Mapping & Mineral Petrography
Field geological mapping may cover general geological data or extend to detail structural, stratigraphic, lithologic, and mineralogical/petrological information. This data can also be used in drilling applications (e.g. pore pressure determination, rock strength calculations, and borehole stability analysis) and in geophysical applications (e.g. time-to-depth, seismic correlation, synthetic seismogram and AVO analysis), with the services are including for:

  • Coal exploration
  • Mineral exploration
  • Petroleum exploration
  • Geothermal exploration
  • Cement raw materials and other industrial mineral exploration

Wellsite Geology
The main objective of a Wellsite Geology is to determine what rock formations of rock cuttings and core are being drilled into and how drilling should be proceed. They identify critical strata from core samples and rock-cutting data and build up knowledge of the structure being drilled. The services including for:

  • Coal & mineral exploration
  • Cement raw materials exploration
  • Groundwater exploration

Our Wellsite Geologists are experienced geologists, deciding when specialized tests should be carried out and, ultimately, when to stop drilling. They send reports and logs of completed drilling to the operations geologist and offer geological advice to oil company representatives. They also incorporate health and safety requirements in daily geological operations.

Wellsite geologists also liaise with drilling engineers, petroleum engineers and mudloggers during the course of projects, with the work is based entirely on-site and usually involves the following tasks:

  •  Evaluating offset data before the start of drilling;
  • Analyzing, evaluating and describing formations while drilling, using cuttings, gas, FEMWD (formation evaluation measurement while drilling) and wireline data;
  • Comparing data gathered during drilling with predictions made at the exploration stage;
  • Advising on drilling hazards and drilling bit optimization;
  • Taking full responsibility for making decisions about suspending or continuing drilling;
  • Advise operations personnel on-site and in the operations office;
  • Supervise for mudlogging, FEMWD and wireline services personnel and monitoring quality control in relation to these services;
  • Keep the detailed records, writing reports, completing daily, weekly and post-well reporting logs and sending these to appropriate departments;
  • Maintaining up-to-date knowledge of MWD (measuring while drilling) tools, such as gamma and resistivity;
  • Communicating regularly with onshore operations offices.

Geochemical Sampling Field Work
The Geochemical Sampling is intended for:

  • Oil & gas exploration
  • Mineral exploration
  • Environmental study

Coal Exploration

Mineral Exploration

Petroleum Exploration

Geothermal Exploration

Cement Raw Materials and Other Industrial Mineral Exploration

Wellsite Geology

Geochemical Sampling Field Work & Supervision

Bandung Office
Address : Jl. Bungur No. 39 Bandung 40153
Phones : (022) 2031689, 2031670
Fax : (022) 2038091
Contact person : Nurmansyah Munir, Sukarya Sanusi
Email :