Oil and gas supply chain consists of four
main phases: 1) Extraction and Exploration, 2) Refining, 3) Transportation,
and 4) Distribution and Marketing. In the context of cost reduction,
exploration is the act of minimizing the expenses associated with finding
commercial oil and gas deposits. These expenses increases from the mentioned
main elementary activities satellite Infrared /Radar/Microwave Surveying, Aerial
Imaging, Geo Botany prospecting and Geo chemical Exploration; Aerial magnetic, Electromagnetic
& Gravity Surveying, Seismic Surveying and Exploratory wells.
The technology applied in oil
and gas exploration is Data Mining that can create cost reductions and
bring about considerable financial benefits. By applying the advanced
techniques, such as pattern recognition, and particular identification to a
more comprehensive set of data collected during seismic acquisition, Geologists
may be able to identify potentially productive seismic trace signatures that
have been overlooked in newly acquired or archived data. Application of data
mining in oil and gas exploration is in the experimental stage with much of the
efforts focused on data-intensive computing. Oil and Gas Companies, Business Analytics
service providers and Academic institutions are working on various
applications. The categories are: structural geology and reservoir
property-issues.
In oil and gas exploration process, Structural
Geology is accurately surveying the top, bottom and lateral extent of
geological structures is important as these structures might produce
hydrocarbons. This locating, in presence of oil and gas, assists in determining
the thickness of the hydrocarbon bearing (rock) layers and consequentially in
deciding the economic viability of the reserve. Furthermore, using accurate
mapping, by the optimal placement of the wells, production in multi-layered
reservoirs, where shale and sand layers are laminated, can be carried out from
and combined into a single well, and, therefore, result in cost savings.
Reservoir Property-Issues The earliest
discoveries of oil and gas deposits were based on determining the structural
traps. But now a different type of trap became important, that is stratigraphic
traps. Stratigraphic traps are one must go beyond the structure and deduce
possible lithology (identifying rock layers in the subsurface) and probable
presence of oil and gas. Horizontal lithological analysis is known as
lithofacies analysis.