松辽盆地苏家屯次洼初始裂陷期扇三角洲沉积特征

doi:10.12108/yxyqc.20200406

岩性油气藏 ›› 2020, Vol. 32 ›› Issue (4): 59–68.doi: 10.12108/yxyqc.20200406

松辽盆地苏家屯次洼初始裂陷期扇三角洲沉积特征

杨文杰^1,2, 胡明毅^1,2, 苏亚拉图³, 刘昌⁴, 元懿^1,2, 李金池^1,2

1. 长江大学地球科学学院, 武汉 430100;
2. 油气资源与勘探技术教育部重点实验室, 武汉 430100;
3. 中国石油华北油田公司二连分公司, 河北任丘 062550;
4. 兰州大学地质科学与矿产资源学院, 兰州 730000

收稿日期:2019-09-19 修回日期:2019-11-25 出版日期:2020-08-01 发布日期:2020-06-16
第一作者:杨文杰(1996-),男,长江大学在读硕士研究生,研究方向为储层沉积学与层序地层学。地址:(430100)湖北省武汉市蔡甸区大学路特1号长江大学。Email:201871273@yangtzeu.edu.cn
通信作者: 胡明毅(1965-),男,博士,教授,博士生导师,主要从事沉积学与层序地层学方面的教学与研究工作。Email:humingyi65@163.com。
基金资助:
国家科技重大专项“中国大型气田形成条件、富集规律及目标评价”（编号：2016ZX05007-002）、油气资源与勘探技术教育部重点实验室开放基金项目“断陷湖盆深层储层主控因素及分布规律研究”（编号：K2017-16）和长江大学优秀博士、硕士学位论文培育计划资助项目“梨树断陷苏家屯地区深部断陷发育期沉积体系与砂体分布研究”（编号：YS2018006）联合资助

Sedimentary characteristics of fan delta during initial rifting stage in Sujiatun sub-depression,Songliao Basin

YANG Wenjie^1,2, HU Mingyi^1,2, SUYA Latu³, LIU Chang⁴, YUAN Yi^1,2, LI Jinchi^1,2

1. School of Earth Sciences, Yangtze University, Wuhan 430100, China;
2. Key Laboratory of Exploration Technologies for Oil and Gas Resources, Ministry of Education, Yangtze University, Wuhan 430100, China;
3. Erlian Branch, PetroChina Huabei Oilfield Company, Renqiu 062550, Hebei, China;
4. School of Earth Sciences, Lanzhou University, Lanzhou 730000, China

Received:2019-09-19 Revised:2019-11-25 Online:2020-08-01 Published:2020-06-16

摘要/Abstract

摘要： 扇三角洲沉积砂砾岩体作为良好的油气储层，一直备受重视。为了深化对断陷盆地初始裂陷期扇三角洲沉积特征的认识，以松辽盆地苏家屯次洼火石岭组为研究对象，综合运用岩心、测井、三维地震资料和古地貌恢复技术，对初始裂陷期扇三角洲的发育规律、沉积特征和控制因素展开深入研究，建立了断陷湖盆初始裂陷期扇三角洲沉积模式。结果表明：①苏家屯次洼初始裂陷期发育东西双断的地堑式断陷湖盆，区内地形高差较大、构造运动活跃，沉积物源主要来自次洼西北、西南和东部等3个方向；②火石岭组形成时期广泛发育扇三角洲沉积体系，岩性以厚层杂色、灰色砂砾岩夹薄层灰色泥岩为主，测井曲线多呈高幅箱形或钟形，在地震剖面上多表现为斜交前积反射、楔状或丘状杂乱反射结构；③沉积体系展布受控盆断裂和古地貌控制，形成"中部凹陷带湖相、东西断阶带扇三角洲相"的沉积格局以及"中部生烃、两侧储集"的生储配置关系；④初始裂陷期构造活动是控制扇三角洲体系发育的主导因素，控盆断裂不仅控制着沉积相带和储层砂体的分布，也持续影响着断陷湖盆的沉积充填演化。该研究成果可为陆相盆地断陷深部的油气勘探提供地质依据。

关键词: 扇三角洲, 初始裂陷期, 沉积特征, 火石岭组, 松辽盆地

Abstract: As a kind of good oil and gas reservoir,sandy conglomerate bodies of fan delta have been paid more attention. In order to deepen the understanding of the sedimentary characteristics of the fan delta during the initial rifting stage in the fault basin,taking Huoshiling Formation in Sujiatun sub-depression of Songliao Basin as an example,the development rules,sedimentary characteristics and controlling factors of fan delta in the initial rifting stage were studied by using core,well logging,three-dimensional seismic data and paleogeomorphic restoring technology. The fan delta sedimentary model in the initial rifting stage of the faulted lacustrine basin was established. The results show that:(1)During the initial rifting stage of Sujiatun sub-depression,there was a grabentype faulted lake basin with EW double faults developed,the terrain height difference was large within the area, the tectonic movement was active,and the sediment source were mainly from the northwest,southwest and east of the sub-depression.(2)During the formation stage of Huoshiling Formation,fan delta sedimentary system was widely developed. The lithology was dominated by thick bedded variegated and gray sandy conglomerate with thin bedded gray mudstone. The logging curves were mostly box or bell shaped with high amplitude. The fan delta deposits are characterized by oblique progradation reflection,wedge-shaped or mound shaped disordered reflection structure on the seismic section.(3)The distribution of the sedimentary system was mainly controlled by basin faults and paleogeomorphology,forming the sedimentary pattern of "lacustrine facies across the central sag,fan delta facies in the east-west fault terrace" and the source reservoir assemblage of "hydrocarbon generation in the center and reservoirs on both sides".(4)The structural activity in the initial rifting stage is the main controlling factor for the development of fan delta system. The basin-controlling fault not only controls the distribution of sedimentary facies belt and reservoir sand bodies,but also continuously affects the sedimentary filling evolution trend of faulted lacustrine basins. The research results could provide a geological basis for oil and gas exploration in deep strata of fault depression of continental basin.

Key words: fan delta, initial rifting stage, sedimentary characteristics, Huoshiling Formation, Songliao Basin

中图分类号:

TE121.3

杨文杰, 胡明毅, 苏亚拉图, 刘昌, 元懿, 李金池. 松辽盆地苏家屯次洼初始裂陷期扇三角洲沉积特征[J]. 岩性油气藏, 2020, 32(4): 59–68.

YANG Wenjie, HU Mingyi, SUYA Latu, LIU Chang, YUAN Yi, LI Jinchi. Sedimentary characteristics of fan delta during initial rifting stage in Sujiatun sub-depression,Songliao Basin[J]. Lithologic Reservoirs, 2020, 32(4): 59–68.

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松辽盆地苏家屯次洼初始裂陷期扇三角洲沉积特征

Sedimentary characteristics of fan delta during initial rifting stage in Sujiatun sub-depression,Songliao Basin

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