The Geology of Petroleum and Natural Gas |
Other editions - View all
Common terms and phrases
A. A. P. G. Bull accumulation alteration amount anhydrite anticline Appalachian asphaltic barrels Bartlesville Basin Baume beds calcareous California cap rock capillary carbon cement character clay close coal compounds considered containing Creek deposits depth Devonian dolomite drilling eastern Eocene fault feet folds formation gases geologic geologist gravity gray Gulf gypsum hydrocarbons igneous importance indicate kerogen lime limestone liquid Lower Cretaceous major material matter Mexia Mexico miles Miocene Mountain movement occur oil and gas Oil Fields Oil Shale Oklahoma Oligocene Ordovician origin outcrops Paleozoic paraffin Pennsylvanian period Permian petroleum pore space porosity porous portion present pressure probably producing horizon productive area salt domes sand bodies sandstone sandy shale sections sediments seepages strata structure sulphur surface synclinal Tertiary Texas theory thickness tion Triassic types U. S. G. S. Bull Unconformity uplift upper vertical yield zone
Popular passages
Page 111 - Production Over 70 No oil or gas with rare exceptions. 65-70 Usually only "shows" or small pockets. No commercial production. 60-65 Commercial pools rare but oil exceptionally high grade when found. Gas wells common but usually isolated rather than in pools. 55-60 Principal fields of light oils and gas of the Appalachian fields.
Page 394 - By ebullition and evaporation these solutions became concentrated until, saturation resulting, precipitation commenced, forming the necklike masses of salt, gypsum, and dolomite now encountered. With the cooling of the intrusive masses and the choking of the vents the process practically ceased. A period of subsidence followed, during which the coastal...
Page 111 - In regions where the progressive devolatilization of the organic deposits in any formation has passed a certain point, • marked in most provinces by 65 to 70 per cent of fixed carbon (pure coal basis) in the associated or overlying coals, commercial oil pools are not present in that formation nor in any other formations normally underlying it, though commercial gas pools may occur in a border zone of higher carbonization.
Page 394 - By contact with the molten instrusives, vast quantities of gas were generated from the reduction of metallic sulphides and the distillation of lignites and organic substances. These gases, accompanied by steam under tremendous pressure, forced their way to the surface through the unconsolidated sands...
Page 394 - Fault blocks resulted, thrust up by Intrusive masses of igneous material in the form of laccoliths at great depth. Owing to the nature of the Tertiary deposits, yielding clays, marls and quicksands, the faulting proper was confined to the deeplying indurated lower Cretaceous and Carboniferous rocks. In the unconsolidated materials of the overlying Tertiary and upper Cretaceous dome-like structure resulted, due to the vertical thrust of the fault blocks pushed up by 'the intrusive masses in tne form...
Page 111 - Wherever the regional alteration of the carbonaceous residues passes the point marked by 65% or perhaps 70% of fixed carbon in the (pure) coals, the light distillates appear, in general, to be gases at rock temperatures. Occluded oils may, in some cases, have escaped volatilization.
Page 111 - In general, the oils found in successively underlying formations are progressively higher in rank. (7) In regions where the progressive devolatilization of the organic deposits in any formation has passed a certain point (usually...
Page 156 - Limestones, boulder limestones, oolites, shell beds, sandy limestones, calcareous sandstones, sands, marls, sandy clays, and clays ; limestones predominate in the upper beds, sands in the middle, and clays in the lower ; the thick clay series (ito m.) contains layers of tufaceous sands at base.
Page vi - American Association of Petroleum Geologists, American Institute of Mining and Metallurgical Engineers...
Page 111 - ... per cent fixed carbon) commercial oil pools are not present in that or underlying formations, although gas may occur. (8) Wherever the regional alteration of the carbonaceous residues passes the point marked by 65 to 70...