Download Field Methods for Petroleum Geologists: A Guide to by Fakhry A. Assaad PDF

By Fakhry A. Assaad

Provides an creation to petroleum exploration equipment, concerning either geophysical and geochemical suggestions and the logistics of assorted drilling ideas and good logging equipment for oil and fuel exploration. the second one a part of the ebook specializes in utilizing those equipment for petroleum exploration in the context of northern Africa. The geology of northern Africa is defined and automatic lithographic correlation charts are offered and utilized to petroleum exploration goals from the region.

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Extra resources for Field Methods for Petroleum Geologists: A Guide to Computerized Lithostratigraphic Correlation Charts Case Study: Northern Africa

Sample text

E) Formation fluid received during the test can be removed from the drill pipe by reverse circulation before the pipe is removed from the borehole. This reversal is performed by closing the blowout preventers and pumping mud down the annulus; the mud then enters the drill pipe through the reversing ports, thereby displacing any formation fluids in the pipe. The recovered fluids may be sampled as they are discharged at the surface (step #6). to get the accurate interpretation of test results. Fig.

2) The rotary drilling method, started by a French civil engineer in 1863, is the most common method that performs a rotary grinding action; some cable tool rigs are still working in parts of Europe as well as in the USA. Rotary drilling methods are much more effective in drilling shallow, unconsolidated sands than the cable tool operations. A cable tool rig is a percussion drilling apparatus consisting of the drill string, which is mainly composed of the drill bit, made of a heavy steel bar; the drill stem, a cylindrical steel bar screwed directly above the bit; jars of heavy steel links, to produce a sharp upward blow on the tools; and tool joints that connect these parts.

Salt concentrations neutralize the electric charge on dispersed bentonite particles, allowing the formation of particle aggregates which are larger than colloidal size (flocculation). , in offshore drilling, and in swamp and seaside locations). In general, the difference between freshwater and saltwater muds is the type of clay used in the gel-forming phase. In offshore drilling operations, seawater, which is more economically used as the base fluid for the salt-mud system, is also effective in drilling shallow offshore domes.

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