In 1985, 2.9 billion tonnes of oil and condensate worldwide. In 1960, about 30% of oil was produced were produced worldwide. Production increased 2.7 in the USA (including the known offshore fields of times in the 25 year period 1961-1985, due to success- the Gulf of Mexico), 15% in the Socialist countries ful exploration and development of new petroleum and 6% in the Persian Gulf; but in 1985, 25% of provinces and basins, or re-evaluation of the earlier production was in the Socialist countries and 17% in estimates. According to Halbouty (l984), there are the Persian Gulf. In 1984, offshore production now 600 known petroliferous basins in the world; 160 accounted for 38% of the total. It is evident that a of them produce oil and gas, 240 are partially rapid increase in production is always connected with explored but do not produce commercial amounts of exploration success in large new petroleum provinces, oil and gas, and about 200 have been poorly studied but the old producing regions have also made a great or not studied at all. The total area of the basins is contribution to the total volume of production. 77.7 million km2, of which 5 1.2 million km2 are The last 25 years have been characterized by the onshore and 26.5 million km2 on continental shelves growth of prospecting and exploration drilling 1.5 and margins. Oil and gas prospects have been iden- times, primarily in the USA, Canada, the USSR and tified in all the continents except the Antarctic, and South-East Asia; about 1 1 % of drilling takes place a prediction has been made for this area also. offshore and in the continental margins. In the old Depressions have been found in the Antarctic producing regions, drilling growth depends on the offshore, and available data suggest that they are improvement of prospecting efficiency due largely to worth studying and should be considered prospective. resources development (accumulated and proved h blished estimates (WEC, P. Burollet, 1984) reserves). A considerable amount of drilling and geoassess world ultimate petroleum resources at 300-350 graphical activity is concentrated in difficult areas of billion tonnes; 61.4 billion tonnes have been prr3- the Arctic and Africa, and offshore (Fig. 1). duced, and about 100 billion tonnes are proved reser- The development of continental shelves, increased ves. The predicted undiscovered resources, including well depth in old areas, improvements in exploration resources in some unstudied parts of discovered fields technology (geophysical methods and drilling techas well as in undiscovered fields of basins with iden- niques), and the expansion of activities in severe tified and unidentified oil prospects, are estimated at Arctic conditions have all increased finding and 140-1
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PA 6 Present and Future Trends in Exploration
N. A. Krylov;
N. A. Krylov
Institute of Geology and Exploitation of Combustible Fuels
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Paper presented at the 12th World Petroleum Congress, Houston, Texas, USA, April 1987.
Paper Number:
WPC-22015
Published:
April 26 1987
Citation
Semenovich, V. V., Krylov, N. A., Zolotov, A. N., and N. N. Lisovsky. "PA 6 Present and Future Trends in Exploration." Paper presented at the 12th World Petroleum Congress, Houston, Texas, USA, April 1987.
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