西湖凹陷古近系沉积环境分析———以微体古生物化石为主要依据

doi:10.3969/j.issn.1673-8926.2011.01.012

Lithologic Reservoirs ›› 2011, Vol. 23 ›› Issue (1): 74-78.doi: 10.3969/j.issn.1673-8926.2011.01.012

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Sedimentary environment of Paleogene in Xihu Sag：Microfossil as the main foundation

JIANG Haijun^1，²，HU Mingyi ^1，3，HU Zhonggui^1，3，KE Ling¹，XU Yanxia¹，WU Lianqian¹

1. School of Geosciences， Yangtze University， Jingzhou 434023， China； 2. Northwest Oilfield Company， Sinopec， Urumqi 830011， China； 3. Key Laboratory of Exploration Technologies for Oil and Gas Resources， Ministry of Education， Yangtze University， Jingzhou 434023， China

Online:2011-02-20 Published:2011-02-20

Abstract

Abstract:

The group of Paleogene in Xihu Sag in Donghai Basin contains Huagang Formation，Pinghu Formation and Baoshi Formation，which not only are the important layers but also the layers where hydrocarbon source rocks developed well. Predecessors made a great deal of studies on sedimentary environment in Xihu Sag， but different people have different view-point to Pinghu Formation. Through the study on themicrofossil data （spore and pollen，calcareous nannofossils， ostracods，oraminifera， pediastrum，marine dinoflagellates etc.） in BS- 1，CHX- 1，TWT- 1， DQ- 1，PH- 1 and NB2- 1- 1 well in Xihu Sag, it is believed that Huagang Formation should be terrestrial deposit, with marine deposit in middle and lower part and terrestrial deposit in the upper part, and Baoshi Formation should be terrestrial deposit. It is deduced that Paleogene should be the subtropical climate.

Key words: imbibition, capillary pressure, matrix, wettability, rock, pore

JIANG Haijun，HU Mingyi，HU Zhonggui，KE Ling，XU Yanxia，WU Lianqian. Sedimentary environment of Paleogene in Xihu Sag：Microfossil as the main foundation[J].Lithologic Reservoirs, 2011, 23(1): 74-78.

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