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GEOREF RECORD

Emplacement of intrusions of the Tarim flood basalt province and their impacts on oil and gas reservoirs; a 3D seismic reflection study in Yingmaili fields, Tarim Basin, northwest China

Gao Zhongbo, Tian Wei, Wang Lei, Shi Yongmin and Pan Mao
Emplacement of intrusions of the Tarim flood basalt province and their impacts on oil and gas reservoirs; a 3D seismic reflection study in Yingmaili fields, Tarim Basin, northwest China
Interpretation (Tulsa) (May 2017) 5 (3): SK51-SK63

Abstract

A basaltic dike-sill network is emplaced into the shallow subsurface of the Yingmai-2 dome, northern Tarim Basin, northwest China. The 3D seismic reflection imaging suggests that these dikes and sills are fed from an intrusion at the focal area of the dome. This basaltic intrusion has a width of approximately 3000 m and thickness of approximately 1000 m, and it is connected with a much larger Early Permian igneous body in the northern Tarim Basin. An unconformity between the Permian basalt lava flows and the base Triassic conglomerates truncates the dome, meaning that the dome must have developed prior to the Triassic. The basaltic intrusion that emplaced beneath the dome likely pushed the surrounding middle Cambrian salts away and instigated uplift of the overlying upper Cambrian to the lower Permian strata. In most cases, igneous activity plays a negative role on formation of oil and gas reservoirs. However, in the Yingmai-2 case, intrusive magmatic activity has caused "forced folding" of the overburdened strata and controlled the formation of a large commercial oil trap. We suggest that the magmatic activity thus also acts as a positive role on the local formation of a producing petroleum system.


ISSN: 2324-8858
EISSN: 2324-8866
Serial Title: Interpretation (Tulsa)
Serial Volume: 5
Serial Issue: 3
Title: Emplacement of intrusions of the Tarim flood basalt province and their impacts on oil and gas reservoirs; a 3D seismic reflection study in Yingmaili fields, Tarim Basin, northwest China
Affiliation: Peking University, School of Earth and Space Sciences, China
Pages: SK51-SK63
Published: 201705
Text Language: English
Publisher: Society of Exploration Geophysicists, Tulsa, OK, United States
References: 42
Accession Number: 2017-074495
Categories: Economic geology, geology of energy sourcesIgneous and metamorphic petrology
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. sects., sketch maps
N36°00'00" - N40°19'60", E76°00'00" - E92°19'60"
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Reference includes data from GeoScienceWorld, Alexandria, VA, United States. Reference includes data supplied by Society of Exploration Geophysicists, Tulsa, OK, United States
Update Code: 201739
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