江汉盆地新沟油田新沟嘴组盐韵律多级划分及其地质意义

doi:10.7605/gdlxb.2015.04.046

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Abstract

Jianghan Basin is a typical saline lacustrine basin during the Mesozoic-Cenozoic in the eastern China. Recently,a tight oil reservoir has been found in the Xingouzui Formation of Xingou Oilfield in Jianghan Basin,and the lithology of the reservoir is dolostone and siltstone associated with salt rhythms. Based on core observation,the data of logging and all kinds of test,we have researched the characteristics of the salt rhythms and its geological significance. The scale of the salt rhythms can be divided into different levels according to the types of salts,the structure and thickness of profile. The profile characteristics of each level and their formation mechanism are analyzed. And the geological significance of salt rhythms from the perspective of palaeoclimate and oil and gas is investigated. Salt rhythms are a direct response to the lake-level variation. The wide development of eury-thermal saline minerals such as calcite and dolomite,indicates that the palaeoclimate was arid to semi-arid in Jianghan Basin during the deposition of Xingouzui Formation in Paleogene. A complete salt rhythm can form a source-reservoir-seal assemblage,which has an important meaning for hydrocarbon generation, accumulation and preservation.

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	Articles by authors
	Liu Jiangyan
	Zhang Changmin
	Zhu Rui
	Yang Bo
	Chen Lixin

Key words： salt rhythms multi-stage rhythms identification Xingouzui Formation Paleogene Xingou Oilfield Jianghan Basin

Received: 09 December 2014 Published: 01 August 2015

ZTFLH:

P588.24＋7

About author: Liu Jiangyan,born in 1988,is a Ph.D. candidate in Yangtze University. Now she is mainly engaged in sedimentology. E-mail: jiangyan19880312@163.com.

Cite this article:

Liu Jiangyan,Zhang Changmin,Zhu Rui et al. Multi-stage salt rhythms division and its geological significance of the Xingouzui Formation in Xingou Oilfield,Jianghan Basin[J]. JOPC, 2015, 17(4): 565-572.

URL:

http://journal09.magtechjournal.com/gdlxb/EN/10.7605/gdlxb.2015.04.046 OR http://journal09.magtechjournal.com/gdlxb/EN/Y2015/V17/I4/565

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