A comparative study of  sequence characteristics of intraplatform shoal reservoirs of Ordovician Yingshan Formation in Keping Area, Tarim Basin: Taking the Shihuiyao and Dawangou sections as  examples

Earth Science Frontiers ›› 2011, Vol. 18 ›› Issue (3): 339-346.

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A comparative study of sequence characteristics of intraplatform shoal reservoirs of Ordovician Yingshan Formation in Keping Area, Tarim Basin: Taking the Shihuiyao and Dawangou sections as examples

1. School of Energy Resources, China University of Geosciences (Beijing), Beijing 100083, China
2. Key Laboratory of Marine Reservoir Evolution and Hydrocarbon Accumulation Mechanism, Ministry of Education, China University of Geosciences (Beijing), Beijing 100083, China
3. State Key Laboratory of Geological Processes and Mineral Resources, China University of Geosciences, Beijing 100083, China

Received:2011-01-20 Revised:2011-03-10 Online:2011-05-22 Published:2011-05-20

Abstract

Abstract:

Carbonate reefbank reservoirs have been the current hot spot of oil and gas exploration in Tarim Basin. Taking the Shihuiyao and Dawangou outcrop profiles in Keping Area of Tarim Basin as the examples, the intraplatform shoal petrographic constitute and sequence stratigraphic features in Ordovician Yingshan Formation are deeply compared, based on which, the controlling factors of intraplatform shoal strata development are analyzed. The results show that: (1)There are some differences on Yingshan Formation development in Shihuiyao and Dawangou Areas. Shihuiyao section mainly develops thin grain limestone and mudstone, while Dawangou section deposits thick layered grain limestone. (2)The sequence characteristics of retrogradation in Shihuiyao Area and aggradation in Dawangou Area reflect that the sealevel change has different control actions in different microtopography fields. The sealevel rising inhibited the limestone development of Shihuiyao Area in the lower topography field, but promoted the limestone development of Dawangou Area in the high topography field. (3) The two intraplatform shoal sedimentary styles of Yingshan Formation in Keping Area may become the favorable targets for oil and gas exploration.

Key words: intraplatform shoal, sequence characteristics, Yingshan Formation, Shihuiyao section, Dawangou section, Keping Area, Tarim Basin

CLC Number:

TE122.23

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A comparative study of sequence characteristics of intraplatform shoal reservoirs of Ordovician Yingshan Formation in Keping Area, Tarim Basin: Taking the Shihuiyao and Dawangou sections as examples

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