| 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 |
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| 引用本文： | 刘江艳,张昌民,朱锐,杨波,陈立欣.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[J].古地理学报,2015,17(4):565-572. |
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| 作者姓名： | 刘江艳 张昌民 朱锐 杨波 陈立欣 |
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| 作者单位： | 1.油气资源与勘探技术教育部重点实验室,长江大学地球科学学院,湖北武汉 430100;2.中国石化江汉油田采油厂,湖北潜江 433124 |
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| 基金项目： | 国家自然科学基金项目(编号:41302096)资助 |
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| 摘 要： | 江汉盆地为中国东部典型的中、新生代盐湖盆地,近些年在新沟油田古近系新沟嘴组发现致密油藏,储集层主要为与盐韵律相关的白云岩和粉砂岩层。为了探究盐韵律的发育特征及其意义,作者以岩心精细观察为基础,结合测录井、分析化验资料,根据盐矿物种类、剖面结构和厚度,对新沟嘴组盐韵律发育规模进行了不同级别的划分,对各级韵律的剖面特征进行了描述,并对其形成机理进行了分析。在此基础上,从古气候及油气2个角度探讨了盐韵律的地质意义。盐韵律的形成是湖平面上升—下降不断变化的直接响应。新沟嘴组盐韵律中广泛发育广温相盐类矿物白云石、方解石,指示江汉盆地古近系新沟嘴期的气候特征为古温度介于寒冷和炎热之间的过渡型半干旱—干旱气候;一个完整的盐韵律可以形成一个生储盖组合,对油气生成、储集和保存具有重要意义。
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| 关 键 词： | 盐韵律 多级划分 新沟嘴组 古近系 新沟油田 江汉盆地 |
| 收稿时间： | 09 December 2014 |
Multi-stage salt rhythms division and its geological significance of the Xingouzui Formation in Xingou Oilfield,Jianghan Basin |
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| Liu Jiangyan,Zhang Changmin,Zhu Rui,Yang Bo,Chen Lixin.Multi-stage salt rhythms division and its geological significance of the Xingouzui Formation in Xingou Oilfield,Jianghan Basin[J].Journal of Palaeogeography,2015,17(4):565-572. |
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| Authors: | Liu Jiangyan Zhang Changmin Zhu Rui Yang Bo Chen Lixin |
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| Institution: | 1.Key Laboratory of Exploration Technologies of Oil and Gas Resources of Ministry of Education, School of Geosciences,Yangtze University,Wuhan 430100,Hubei;2.Oil Production Plant in Jianghan Oilfield,SINOPEC,Qianjiang 433124,Hubei |
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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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| Keywords: | salt rhythms multi-stage rhythms identification Xingouzui Formation Paleogene Xingou Oilfield Jianghan Basin |
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