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Title: The Sredne-Amursky basin: A migrating cretaceous depocenter for the Amur river, eastern Siberia

Recently acquired seismic, well, and regional geological data imply favorable conditions for the accumulation of oil and gas in the 20,000 km[sup 2] Sredne-Amursky basin. Major graben and northeast-trending sinistral wrench-fault systems are recognized in the basin. Lower and Upper Cretaceous sediments are up to 9000 and 3000 m thick, respectively. Paleogeographic reconstructions imply that during the Late Triassic-Early Cretaceous the Sredne-Amursky basin was part of a narrow marine embayment (back-arc basin), which was open to the north. During the Cretaceous, the region was part of a foreland basin complicated by strike-slip, which produced subsidence related to transtension during oblique collision of the Sikhote-Alin arc with Eurasian margin. Contemporaneous uplift also related to this collision migrated from south to north and may have sourced northward-directed deltas and alluvial fans, which fed northward into the closing back-arc basin between 130 and 85 Ma. The progradational clastic succession of the Berriasian-Albian and the Late Cretaceous fluvial, brackish water and paralic sediments within the basin may be analogous to the highly productive late Tertiary clastics of the Amur River delta in the northeast Sakhalin basin. Cretaceous-Tertiary lacustrine-deltaic sapropelic shales provide significant source and seal potential and potential reservoirs occur in the Cretaceous andmore » Tertiary. Structural plays were developed during Cretaceous rifting and subsequent strike-slip deformation. If the full hydrocarbon potential of the Sredne-Amursky basin is to be realized, the regional appraisal suggests that exploration should be focused toward the identification of plays related to prograding Cretaceous deltaic depositional systems.« less
Authors:
; ;  [1]
  1. (Intera Information Technologies, Henley-on-Thames (United Kingdom))
Publication Date:
OSTI Identifier:
6916227
Report Number(s):
CONF-9310237--
Journal ID: ISSN 0149-1423; CODEN: AABUD2
Resource Type:
Conference
Resource Relation:
Journal Name: AAPG Bulletin (American Association of Petroleum Geologists); (United States); Journal Volume: 77:9; Conference: American Association of Petroleum Geologists (AAPG) mid-continent section meeting, Amarillo, TX (United States), 10-12 Oct 1993
Country of Publication:
United States
Language:
English
Subject:
02 PETROLEUM; 03 NATURAL GAS; HYDROCARBONS; BUILDUP; RUSSIAN FEDERATION; EXPLORATION; SEDIMENTARY BASINS; RESOURCE POTENTIAL; SHALES; SOURCE ROCKS; CRETACEOUS PERIOD; GEOLOGIC HISTORY; GEOLOGY; NATURAL GAS DEPOSITS; PETROLEUM DEPOSITS; RESERVOIR ROCK; RIVER DELTAS; SEISMIC SURVEYS; SIBERIA; WELL LOGGING; ASIA; COASTAL REGIONS; EASTERN EUROPE; EUROPE; GEOLOGIC AGES; GEOLOGIC DEPOSITS; GEOLOGIC STRUCTURES; GEOPHYSICAL SURVEYS; MESOZOIC ERA; MINERAL RESOURCES; ORGANIC COMPOUNDS; RESOURCES; ROCKS; SEDIMENTARY ROCKS; SURVEYS 020200* -- Petroleum-- Reserves, Geology, & Exploration; 030200 -- Natural Gas-- Reserves, Geology, & Exploration