GEOPHYSICAL CHARACTERISTICS AND EXPLORATORY SIGNIFICANCE OF THE DEPOSITIONAL SYSTEMS IN THE HALF-GARBEN BASIN:TAKING THE MIDDLE OF WULIYASITAI DEPRESSION AS AN EXAMPLE

Geoscience ›› 2005, Vol. 19 ›› Issue (Suppl): 101-104.

• Engineering Geology and Environmental Geology • Previous Articles Next Articles

GEOPHYSICAL CHARACTERISTICS AND EXPLORATORY SIGNIFICANCE OF THE DEPOSITIONAL SYSTEMS IN THE HALF-GARBEN BASIN:TAKING THE MIDDLE OF WULIYASITAI DEPRESSION AS AN EXAMPLE

SHI Shu-ling¹，ZHANG Hai-feng¹，ZHANG Qing-de², WANG Yu-sheng¹

1China University of Geosciences, Beijing100083，China;
2International Project Department, Petrochina Well Logging Company Limited,Xi'an，Shaanxi 710021,China

Received:2004-09-17 Revised:2004-11-05 Online:2005-03-20 Published:2013-04-08

Abstract

Abstract:

The middle Wuliyasitai faulted depression is taken as an example of half-garben, the depositional systems of which include braided channel delta, lowstand wedge, basin-floor fan and nearshore fan. The spatial distribution of depositional systems is controlled by a slope break zone. It is found that a basin floor fan is deposited in the depression margin followed by a near shore fan in a steep slope. A braided fan delta and lowstand wedge and basin floor fan are deposited in a gentle slope and a depression margin. The characteristics of depositional systems are generalized with well logging responses and sesimic reflections.The depostional systems are deposited in the gentle slope and depression margins collocated with the maximum flooding surfaces to form effective source-reservoir-cap rock assemblages.

Key words: Erlian basin, Wuliyasitai depression, depositional system, slope break zone, seismic reflection characteristic, well logging response

CLC Number:

T631

SHI Shu-ling，ZHANG Hai-feng，ZHANG Qing-de, WANG Yu-sheng. GEOPHYSICAL CHARACTERISTICS AND EXPLORATORY SIGNIFICANCE OF THE DEPOSITIONAL SYSTEMS IN THE HALF-GARBEN BASIN:TAKING THE MIDDLE OF WULIYASITAI DEPRESSION AS AN EXAMPLE[J]. Geoscience, 2005, 19(Suppl): 101-104.

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GEOPHYSICAL CHARACTERISTICS AND EXPLORATORY SIGNIFICANCE OF THE DEPOSITIONAL SYSTEMS IN THE HALF-GARBEN BASIN:TAKING THE MIDDLE OF WULIYASITAI DEPRESSION AS AN EXAMPLE

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