Seismic Reflection, Distribution, and Potential Trap of Permian Volcanic Rocks in the Tahe Field

Permian Kaipaileicike （开派雷兹克） volcanic rocks approximately 0-200 m thick are drilled in the Tahe （塔河） field. The distribution of volcanic rocks and their potential to form hydrocarbon reservoirs are discussed based on the integrated interpretation of log and 3D seismic data. The volcanic rocks, main...

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Bibliographic Details
Published in:Journal of earth science (Wuhan, China) China), 2012-08, Vol.23 (4), p.421-430
Main Author: 蒲仁海 张云龙 罗静兰
Format: Article
Language:English
Subjects:
Basalt
Biogeosciences
Cambrian
Carboniferous
Craters
Earth and Environmental Science
Earth science
Earth Sciences
Geochemistry
Geology
Geotechnical Engineering & Applied Earth Sciences
Hydrocarbons
Ordovician
Permian
Reflection
Reservoirs
Rocks
Seismic engineering
Seismic phenomena
Seismology
Triassic
Volcanic rocks
Volcanoes
三维地震资料
二叠系
分配
地震反射波法
塔河油田
火山岩地层
火山角砾岩
陷阱
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Summary:Permian Kaipaileicike （开派雷兹克） volcanic rocks approximately 0-200 m thick are drilled in the Tahe （塔河） field. The distribution of volcanic rocks and their potential to form hydrocarbon reservoirs are discussed based on the integrated interpretation of log and 3D seismic data. The volcanic rocks, mainly consisting of dacites and basalts, are sandwiched between the Lower Triassic and Lower Carboniferous and bounded by top and bottom unconformities. The dacites accumulated in a mound shape around volcanic craters, whereas the basalts are deposited in tabular or trough-fill ge- ometries. Permian volcanic craters mainly located at the northwest corner of the Tahe field are identi- fied from volcanic rock thickening, occurrence of volcanic breccias, structural arch of the top Permian, seismic attribute anomalies, and fault （piercing conduit） reflections. Along the northwest wing of a Carboniferous salt dome, a stratigraphic trap is formed by a northeast updip pinch-out of Permian volcanic rock. Oil indications within the trap are found in numerous wells. The reservoir volcanic rocks are mainly of the fracture-pore pattern and covered by the caprock of a Lower Triassic mudstone. The hydrocarbon reservoir, which can potentially be a medium-sized oil pool, is connected to Camhrian-Ordovician source rocks through normal faults along the salt dome boundary.
ISSN:1674-487X
1867-111X
DOI:10.1007/s12583-012-0265-2