镇北地区前侏罗纪古地貌特征与油气富集规律研究
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摘要
综合运用钻井岩心、测井及测试分析等资料,采用地层厚度印模法,恢复了鄂尔多斯镇北地区前侏罗纪古地貌形态,在此基础上,对前侏罗纪古地貌形态与中下侏罗统砂体展布特征及油气成藏关系进行了探讨。研究表明:镇北地区前侏罗纪发育高地、古河谷、斜坡、河间丘、古阶地等5种古地貌单元;下侏罗统富县组—延10段辫状河沉积沿古河谷发育,深切河谷为油气提供了良好的运移通道和储集空间,为古地貌控制明显的斜坡-河流相成藏模式;经过早期的填平补齐,延9期发育三角洲沉积,油气多在有效储盖配置的构造高部位聚集成藏,为河间丘-三角洲前缘成藏模式。
Comprehensive use of drilling, core, logging and test analysis data, Northern Zhenyuan Area′ s pre-Jurassic palaeogeomorphology was reconstructed by the method of formation thickness impression. Based on this, the relationship between the pre-Jurassic palaeogeomorphology and the distribution features of the middle and lower Jurassic sandstone and hydrocarbon accumulation are discussed. Research shows that: five palaeogeomorphic patterns in Northern Zhenyuan Area developed, highland,incised valley, slope, mound, ancient terrace; the braided river deposits of the lower Jurassic Fuxian Formation Yan 10 developed along the ancient valley, deep valley provided good migration channel and storage space for oil and gas, the slope-river phase accumulation model developed, which was controlled by palaeogeomorphology obviously; after an early filling up, delta deposit developed during the Yan 9 period, oil and gas usually accumulated in the high part of the structure, where there are effective reservoirs. Generally, mound-delta front phase accumulation model formed.
Comprehensive use of drilling, core, logging and test analysis data, Northern Zhenyuan Area′ s pre-Jurassic palaeogeomorphology was reconstructed by the method of formation thickness impression. Based on this, the relationship between the pre-Jurassic palaeogeomorphology and the distribution features of the middle and lower Jurassic sandstone and hydrocarbon accumulation are discussed. Research shows that: five palaeogeomorphic patterns in Northern Zhenyuan Area developed, highland,incised valley, slope, mound, ancient terrace; the braided river deposits of the lower Jurassic Fuxian Formation Yan 10 developed along the ancient valley, deep valley provided good migration channel and storage space for oil and gas, the slope-river phase accumulation model developed, which was controlled by palaeogeomorphology obviously; after an early filling up, delta deposit developed during the Yan 9 period, oil and gas usually accumulated in the high part of the structure, where there are effective reservoirs. Generally, mound-delta front phase accumulation model formed.
引文
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[11]宋凯,吕剑文,凌升阶,等.鄂尔多斯盆地定边—吴旗地区前侏罗纪古地貌与油藏[J].古地理学报,2003,5(4):497-507.
[12]朱静,李文厚,韩永林,等.陇东地区前侏罗纪古地貌及油藏成藏规律研究[J].沉积学报,2010,28(6):1229-1236.
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[14]邓南涛,张枝焕,任来义,等.鄂尔多斯盆地南部延长组油页岩地球化学特征及分布规律[J].石油实验地质,2013,35(4):432-437.
[2]何自新.鄂尔多斯盆地演化与油气[M].北京:石油工业出版社,2003:239-247.
[3]袁珍,李文厚,朱静.鄂尔多斯盆地陇东地区侏罗系古地貌恢复及其对石油聚集的影响[J].地质通报,2013,32(11):1806-1814.
[4]孙肇才,谢秋元.叠合盆地的发展特征及其含油性:以鄂尔多斯盆地为例[J].石油实验地质,1980,2(1):13-21.
[5]赵虹,党犇,郑小杰,等.安塞油田前侏罗纪古地貌特征及其与油气富集关系[J].西北大学学报:自然科学版,2012,42(2):270-275.
[6]张纪智,陈世加,肖艳,等.鄂尔多斯盆地华庆地区长8致密砂岩储层特征及其成因[J].石油与天然气地质,2013,34(5):679-684.
[7]郭正权,张立荣,楚美娟,等.鄂尔多斯盆地南部前侏罗纪古地貌对延安组下部油藏的控制作用[J].古地理学报,2008,10(1):63-71.
[8]毛飞跃,侯长冰,苟幸福,等.鄂尔多斯盆地镇原油田侏罗系古地貌与油成藏关系分析[J].岩性油气藏,2013,25(5):44-48.
[9]李凤杰,王多云,刘自亮,等.鄂尔多斯盆地华池地区中侏罗统延安组延9油层组河流沉积及演化[J].古地理学报,2009,11(3):275-283.
[10]于雷,王维斌,车飞,等.鄂尔多斯盆地吴旗油区下侏罗统古地貌特征与油气富集关系[J].断块油气田,2014,21(2):147-151.
[11]宋凯,吕剑文,凌升阶,等.鄂尔多斯盆地定边—吴旗地区前侏罗纪古地貌与油藏[J].古地理学报,2003,5(4):497-507.
[12]朱静,李文厚,韩永林,等.陇东地区前侏罗纪古地貌及油藏成藏规律研究[J].沉积学报,2010,28(6):1229-1236.
[13]黄俨然,文志刚,何文祥,等.姬塬前侏罗纪侵蚀古地貌对油藏分布的影响[J].特种油气藏,2008,15(6):38-44.
[14]邓南涛,张枝焕,任来义,等.鄂尔多斯盆地南部延长组油页岩地球化学特征及分布规律[J].石油实验地质,2013,35(4):432-437.