Skip to Main Content
GEOREF RECORD

Key seismic exploration techniques for foreland thrust belt; a case from the complex deep subsalt structure of Kuqa, Tarim Basin, western China

Yang Ping, Sun Longde and Qi Jiafu
Key seismic exploration techniques for foreland thrust belt; a case from the complex deep subsalt structure of Kuqa, Tarim Basin, western China
Interpretation (Tulsa) (August 2016) 4 (3): T337-T346

Abstract

The Kuqa area of the Tarim Basin is a typical foreland thrust belt. Abundant petroleum resources are stored in the complex subsalt structures at depths greater than 6500 m. The extremely rugged surface, the severely deformed gypsum-salt cap above the reservoir, and the large burial depth of the overthrust target make it difficult to accurately delineate the target structures. Those geologic challenges translate into geophysical difficulties of complex seismic wavefields, low signal-to-noise ratio (S/N), and poor imaging accuracy, which compound the exploration challenge in the Kuqa area. To meet the exploration challenge, a research campaign has been conducted since 2005 to integrate seismic acquisition, processing, and interpretation. After almost a decade of research effort and pilot applications, a set of techniques, comprised of wide-line large-array acquisition, anisotropic prestack depth migration under rugged topography, complex structure modeling, and structure mapping with varying velocities, was developed. The use of these techniques has much improved the S/N, imaging accuracy, subsequent interpretation, and well placement. As a result, the success ratio of exploration drilling has increased from less than 25% to more than 64% in the Kuqa area of the Tarim Basin.


ISSN: 2324-8858
EISSN: 2324-8866
Serial Title: Interpretation (Tulsa)
Serial Volume: 4
Serial Issue: 3
Title: Key seismic exploration techniques for foreland thrust belt; a case from the complex deep subsalt structure of Kuqa, Tarim Basin, western China
Affiliation: China National Petroleum Corporation, Zhuozhou, China
Pages: T337-T346
Published: 201608
Text Language: English
Publisher: Society of Exploration Geophysicists, Tulsa, OK, United States
References: 12
Accession Number: 2017-002800
Categories: Economic geology, geology of energy sourcesApplied geophysics
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. sects., 1 table, sketch maps
N40°00'00" - N44°49'60", E68°00'00" - E96°00'00"
N41°00'00" - N42°25'00", E80°30'00" - E85°00'00"
N36°00'00" - N40°19'60", E76°00'00" - E92°19'60"
Secondary Affiliation: China University of Petroleum, CHN, China
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: 201703
Close Modal
This Feature Is Available To Subscribers Only

Sign In or Create an Account

Close Modal
Close Modal