Reservoir rocks in the crystalline basement of Tataria
The discovery of underdense zones in crystalline basement became known only as a result of superdeep, deep-parametric, and exploration drilling crystalline and Riphean-Vendian sedimentary formations, carried out in recent years on the Kola Peninsula and in Tataria. Recently in Tataria, the drilling of more than 10 deep wells has been completed, exposing rocks of the crystalline basement at a depth of a few hundred up to 3250 m (Minnibayevo DH 20,000). The drilling data from these wells indicates the presence at a significant depth (down to 3200 m) in the basement sequence of permeable fissured reservoir zones, along which gas-saturated fluids freely circulate. As the drilling of Minnibayevo DH 20,000 has shown, the number of gas-saturated zones increases with depth, and the significant saturation of the subsurface waters in hydrocarbon gases and bituminous substances, suggests the fractured, cavernous, and brecciated sectors of the basement have some petroleum potential. The authors report significantly porosity in basement rocks and suggest methods of well-logging and drill-stem testing that can be used to investigate such unconventional targets. 7 references.
- OSTI ID:
- 6962093
- Journal Information:
- Int. Geol. Rev.; (United States), Vol. 29:9; Other Information: Translated from Geologiya Nefti I Gaza; No. 7, 30-34(1987)
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
BASEMENT ROCK
POROSITY
PETROLEUM DEPOSITS
EXPLORATION
USSR
CALIPER LOGGING
CARBONACEOUS MATERIALS
DEPTH 1-3 KM
DRILL STEM TESTING
GAMMA LOGGING
GAS SATURATION
GEOLOGIC FISSURES
HYDROCARBONS
NEUTRON-GAMMA LOGGING
PERMEABILITY
RECOMMENDATIONS
SONIC LOGGING
SOURCE ROCKS
WELL DRILLING
WELL LOGGING
ASIA
DEPTH
DIMENSIONS
DRILLING
EASTERN EUROPE
EUROPE
GEOLOGIC DEPOSITS
GEOLOGIC STRUCTURES
MATERIALS
MINERAL RESOURCES
NEUTRON LOGGING
ORGANIC COMPOUNDS
RADIOACTIVITY LOGGING
RESOURCES
SATURATION
TESTING
020200* - Petroleum- Reserves
Geology
& Exploration