Oil and gas prospecting and exploration is a complex, drawn-out process taking place in several stages and involving numerous scientific disciplines, including primarily geology, geophysics, geochemistry, petrophysics, micropaleontology, sedimentology, etc.
MND employs a team of experts trained in exploration geology, seismic data processing, petrophysics, reservoir engineering and production technology. We also cooperate with a number of specialized companies and scientific facilities both at home and abroad.
The initial phase of exploration focuses on extensive review which involves the processing of all existing geological documentation available for the given area.
This is followed by project development and the completion of seismic surveys covering the most promising parts of the area. Seismic surveying is a non-invasive method. It utilizes minor seismic vibrations to generate seismic waves which propagate through the ground in different ways due to the different properties of the rock environment.
MND hires reputable foreign companies to perform these surveys. At present, the majority of seismic surveys are carried out in the form of 3D seismics, where each survey is conducted in a defined network of receiver points (seismic sensor nodes) which make it possible to develop a three-dimensional model of the subsurface geologic structure.
The next step involves numerical processing of the field seismic data. In addition to standard processing techniques, we also employ state-of-the-art methods such as DMO stacking, post-stack migration (POSTM), pre-stack migration (PreSTM), amplitude versus offset (AVO) analysis, seismic inversion (STRATA) and checkshot processing.
Further processing of the obtained data includes their geological-geophysical interpretation and the construction of models of the rock environment and petroleum systems, which form the basis for the design of exploration wells.
Exploration well drilling and completion represents the final stage in hydrocarbon prospecting. Drilling operations are conducted based on a carefully prepared and approved exploration project. The drilling period varies according to the character of each well, its depth and the geological program and can range from 1 to 2 months.
If hydrocarbons are encountered, the well is cased to perform a flow test, which can also significantly vary in duration. The objective is to verify the character and size of hydrocarbon accumulation, to determine whether or not it can be commercially produced and also to obtain data for production technology design.
Another task of the geological team is to evaluate the size of the hydrocarbon reserves. To do this, we apply the standard, widely used PRMS (Petroleum Resource Management System) as well as other methods that are in line with Czech statutory requirements.