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| 陕北地区延长组坳陷湖盆浅湖与深湖亚相的识别特征 | |
| 引用本文： | 庞军刚,李文厚,肖丽.陕北地区延长组坳陷湖盆浅湖与深湖亚相的识别特征[J].兰州大学学报(自然科学版),2009,45(6). |
| 作者姓名： | 庞军刚 李文厚 肖丽 |
| 作者单位： | 1. 西北大学,地质学系/大陆动力学国家重点实验室,西安,710069;西安石油大学,油气资源学院,西安,710065 2. 西北大学,地质学系/大陆动力学国家重点实验室,西安,710069 3. 中国石油化工股份有限公司胜利油田分公司地质科学研究院,山东,东营,257015 |
| 基金项目： | 国家重点基础研究发展计划(973计划)项目，长江学者和创新团队发展计划项日 |
| 摘 要： | 通过岩心、测井曲线等资料的研究,对延长组长7沉积相进行了专项研究.认为浅湖和深湖沉积在岩性、沉积构造、生物化石、测井曲线、沉积序列等方面均具有明显的区别.根据这些特征,确定了长7各个油层段的深湖线.在古地理演化过程中,长7_3湖盆达到鼎盛,深湖区范围最大,东北部达吴起-甘泉-富县-洛川一线,西南部达镇原-泾川-长武-旬邑一线,从长7_3-长7_2-长7_1,深湖线逐渐向深湖区收缩.浅湖区三角洲前缘砂体及深湖区湖底扇砂体均逐渐发育. |
| 关 键 词： | 深湖 浅湖 延长组 沉积相 识别特征 |
Identifying characteristics of shallow lake and deep lake of Yanchang formation depressed type lacustrine basin in Shanbei area |
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| PANG Jun-gang,LI Wen-hou,XIAO Li.Identifying characteristics of shallow lake and deep lake of Yanchang formation depressed type lacustrine basin in Shanbei area[J].Journal of Lanzhou University(Natural Science),2009,45(6). | |
| Authors: | PANG Jun-gang LI Wen-hou XIAO Li |
| Abstract: | According to data such as core and logging curve, etc, sedimentary fades in Yanchang formation were studied. The result shows that deposit of shallow lake is different from that of deep lake in lithology,sedimentary structure, paleo-biology fossil, sedimentary sequence, etc. Deep lake lines during oil layer group of Chang-7 were recognized under the guidance discussed above. During the paleo-geography evolution of Chang-7 group, lake basin was at its best during Chang-7_3, and deep lake range was also at its best,reaching Wuqi-Ganquan-Fuxian-Luochuan in north-east, and reaching Zhenyuan-Jingchuan-Changwu-Xunyi in south-west. From Chang-7_3, Chang-7_2 to Chang-7_1, deep lake line gradually moved to the lake center and sandstones formed by delta front in shallow lake and turbidite in deep lake gradually better developed. |
| Keywords: | deep lake shallow lake Yanchang formation sedimentary facy identifying characteristics |
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