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→Exploratory Drilling
The data collected from the geologic and geophysical surveys will conclude to a possibility of oil resources location. However, the conclusion is not definite enough before petroleum is now to be existed in the trap, and the quantity is sufficient to make the production activity economical. The only way to provide a definite answers is to drill and test exploratory well(s).
The data collected from the geologic and geophysical surveys will conclude to a possibility of oil resources location. However, the conclusion is not definite enough before petroleum is now to be existed in the trap, and the quantity is sufficient to make the production activity economical. The only way to provide a definite answers is to drill and test exploratory well(s).
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UGM_Petroleum_Exploration_Fig_9.png|{{figure number|9}}Standard cable tool drilling system (Source: Assaad, 2009 courtesy AIME)
UGM_Petroleum_Exploration_Fig_10.png|{{figure number|10}}Well log obtained from wireline logging (Source: usgs.gov)
</gallery>
The exploratory well location is determined by geologists and geophysicists. Samples of the rock cuttings obtained from exploratory drilling are collected and examined to identify the type of formation and the presence of hydrocarbon materials within the rock based on sample’s composition.
The exploratory well location is determined by geologists and geophysicists. Samples of the rock cuttings obtained from exploratory drilling are collected and examined to identify the type of formation and the presence of hydrocarbon materials within the rock based on sample’s composition.
Besides rock cutting examination, well logging are also run. Well logging will provide information about rock and fluid properties based on type of logging operated. The tools are placed to the well using electric cable (wireline). There are various type of wireline logging: radioactive log, consists of Gamma Ray, Neutron, and Density; electric log, consists of SP and resistivity; acoustic log; image log; and sampling. Logging will provide information of rock or fluid properties versus depth.
Besides rock cutting examination, well logging are also run. Well logging will provide information about rock and fluid properties based on type of logging operated. The tools are placed to the well using electric cable (wireline). There are various type of wireline logging: radioactive log, consists of Gamma Ray, Neutron, and Density; electric log, consists of SP and resistivity; acoustic log; image log; and sampling. Logging will provide information of rock or fluid properties versus depth.
The data provided by one exploratory well may not be sufficient, so additional exploratory drilling is needed to provide better information of the petroleum system. Along with seismic section, well logs will provide data to calculate volume of hydrocarbon stored and conclude whether the production will be economically feasible.
The data provided by one exploratory well may not be sufficient, so additional exploratory drilling is needed to provide better information of the petroleum system. Along with seismic section, well logs will provide data to calculate volume of hydrocarbon stored and conclude whether the production will be economically feasible.