| 塔东南坳陷侏罗系杨叶组沉积相特征及古环境研究 |
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| 引用本文：陈骥,姜在兴,姜正龙,邱海峻,姜鹍鹏,符文康,毕彩芹.2015.塔东南坳陷侏罗系杨叶组沉积相特征及古环境研究[J].地球学报,36(3):344-352. |
| DOI：10.3975/cagsb.2015.03.09 |
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| 基金项目:国家“十二五”科技重大专项重点油气勘探新领域储层地质与评价“薄互层-细粒储层地质与评价”(编号: 2011ZX05009-002) |
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| 中文摘要:沉积环境影响着烃源岩的发育情况, 因而研究侏罗系杨叶组沉积时的古环境对塔东南坳陷的勘探开发及有利区块的优选有着重要意义。本文根据区内已有钻井的岩心观察结果、岩电组合特征、分析化验资料和野外露头及古生物特征, 对区内侏罗系杨叶组的沉积相特征及古环境进行了分析研究, 指出了该区沉积相主要发育有辫状河三角洲沉积和湖泊沉积。其沉积环境为陆相淡水环境, 具有较强的还原性; 古气候为温暖半潮湿亚热带气候。提出该区优质烃源岩形成的最有利相带的浅湖-半深湖湖湾环境。通过对沉积相和古环境的研究, 总结了沉积相平面展布特征和四大控制因素。 |
| 中文关键词:塔里木盆地 杨叶组 沉积相特征 古环境 有利烃源岩展布区 |
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| Sedimentary Facies Characteristics and Palaeoenvironment of Jurassic Yangye Formation in the Southeastern Depression of the Tarim Basin |
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| Abstract:Depositional environment is directly related to the development of source rock, and hence the study of the depositional environment has important significance for optimizing the favorable exploration blocks. The authors studied sedimentary facies characteristics and palaeoenvironment of Jurassic Yangye Formation on the basis of core observation, lithologic-electric logging features, test data, outcrop and palaeontological features. It is pointed out that the study area has developed two types of sedimentary facies: braided delta river facies and lake facies. The palaeoenvironment was a terrestrial freshwater environment characterized by strong reducibility. The paleoclimate was in a warm-humid climate background. A viewpoint confirmed by the field investigation is given, arguing that the optimum sedimentary facies were the shallow to half-deep lakes. Based on investigating the source rock sedimentary facies and palaeoenvironment, the authors have summarized the flat facies characteristics and the four main controlling factors. |
| keywords:Tarim Basin Yangye Formation sedimentary characteristics paleoclimate beneficial hydrocarbon source rock exhibition area |
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