三角洲前缘滑塌型重力流沉积特征及控制因素——以松辽盆地大安地区青一段为例

doi:10.12108/yxyqc.20210118

岩性油气藏 ›› 2021, Vol. 33 ›› Issue (1): 198–208.doi: 10.12108/yxyqc.20210118

三角洲前缘滑塌型重力流沉积特征及控制因素——以松辽盆地大安地区青一段为例

符勇¹, 李忠诚², 万谱³, 阙宜娟³, 王振军², 吉雨², 黄礼⁴, 罗静兰¹, 鲍志东³

1. 西北大学地质学系/大陆动力学国家重点实验室, 西安 710069;
2. 中国石油吉林油田分公司勘探开发研究院, 吉林松原 138001;
3. 中国石油大学(北京)地球科学学院, 北京 102249;
4. 中国石油塔里木油田分公司, 新疆库尔勒 841000

收稿日期:2020-09-16 修回日期:2020-10-27 出版日期:2021-02-01 发布日期:2021-01-25
第一作者:符勇(1995-),男,西北大学在读博士研究生,研究方向为油气地质与勘探。地址:(710069)陕西省西安市碑林区西北大学(太白校区)。Email:fuyong1995@foxmail.com
通信作者: 罗静兰(1957-),女,教授,博士生导师,主要从事碎屑岩储层沉积学、成岩作用以及火山岩岩相学、储层地质学方面的教学与研究工作。Email:jlluo@nwu.edu.cn。
基金资助:
国家科技重大专项“典型盆地深层—超深层流体动力场与输导层地质模型研究”（编号：2017ZX05008-004-004）资助

Sedimentary characteristics and controlling factors of slump gravity flow in delta front: a case study of Qing 1 member in Da'an area,Songliao Basin

FU Yong¹, LI Zhongcheng², WAN Pu³, QUE Yijuan³, WANG Zhenjun², JI Yu², HUANG Li⁴, LUO Jinglan¹, BAO Zhidong³

1. Department of Geology/State Key Laboratory of Continental Dynamics, Northwest University, Xi'an 710069, China;
2. Research Institute of Exploration and Development, PetroChina Jilin Oilfield Company, Songyuan 138001, Jilin, China;
3. College of Geosciences, China University of Petroleum(Beijing), Beijing 102249, China;
4. PetroChina Tarim Oilfield Company, Korla 841000, Xinjiang, China

Received:2020-09-16 Revised:2020-10-27 Online:2021-02-01 Published:2021-01-25

摘要/Abstract

摘要： 重力流砂体是烃源岩内生储组合的重要部分，具有较大的勘探开发潜力。综合利用岩心、三维地震、粒度分析、测井及录井资料，结合区域地质背景，系统分析了松辽盆地大安地区青一段三角洲前缘滑塌型重力流类型、识别标志、沉积特征、形成及分布控制因素和勘探开发潜力。结果表明：研究区青一段主要发育滑动-滑塌、砂质碎屑流及浊流3种滑塌型重力流，这3种重力流在垂向上相邻或相间分布，平面上依次演化。坡折带和基准面变化对这3种重力流的形成和分布具有控制作用，滑动-滑塌、砂质碎屑流及浊流分别分布于斜坡坡脚、斜坡与盆地平原。基准面上升期与下降期砂质碎屑流表现出不同的沉积特征和流体性质。基准面上升期是重力流砂体发育的有利时期，砂质碎屑流呈席状分布，发育完整的重力流沉积序列；基准面下降早期重力流砂体发育规模较小，砂质碎屑流表现出了河道的分布形态，且具有牵引流和重力流的双重流体性质。砂质碎屑流及浊流砂层厚度较薄，但因其常与湖相烃源岩伴生而形成岩性圈闭，单井产量往往较高。

关键词: 滑塌型重力流, 流体性质, 青山口组, 上白垩统, 大安地区, 松辽盆地

Abstract: Gravity flow sand body is an important part of the source-reservoir assemblage in source rocks and has great potential for exploration and development. Based on the data of cores,3D seismic,grain size analysis, wire-logging and mud-logging,combined with regional geological background,the types,identification marks, sedimentary characteristics,formation and distribution controlling factors,and exploration and development potential of slump gravity flow in delta front of the first member of Qingshankou Formation in Da'an area of Songliao Basin were analyzed systematically. The results show that there are three types of slump gravity flow developed in Qing 1 member in the study area,including sliding-slump,sandy debris flow and turbidity flow,which are distributed adjacently or alternately distributed in the vertical direction,and evolve sequentially in the plane. Slope break zone and base level change have a controlling effect on the formation and distribution of these three types of gravity flow. Sliding-slump,sandy debris flow and turbidity flow are distributed at the foot of slope, slope and basin plain,respectively. The sandy debris flow shows different sedimentary characteristics and fluid properties during base level rising and falling period. The base level rising period is a favorable period for the development of gravity flow sand body,and the sandy debris flow is distributed in a sheet shape,with completely developed gravity flow sedimentary sequence. In the early stage of base level falling,the distribution of gravity flow sand bodies is relatively restricted,and the sandy debris flow shows a river channel distribution pattern that is of dual fluid properties of traction flow and gravity flow. The sandy debris flow and turbidite sand layer are relatively thin and often associated with lacustrine source rocks to form lithologic traps,and the single well production often tends to be higher.

Key words: slump gravity flow, fluid properties, Qingshankou Formation, Upper Cretaceous, Da'an area, Songliao Basin

中图分类号:

TE121

符勇, 李忠诚, 万谱, 阙宜娟, 王振军, 吉雨, 黄礼, 罗静兰, 鲍志东. 三角洲前缘滑塌型重力流沉积特征及控制因素——以松辽盆地大安地区青一段为例[J]. 岩性油气藏, 2021, 33(1): 198–208.

FU Yong, LI Zhongcheng, WAN Pu, QUE Yijuan, WANG Zhenjun, JI Yu, HUANG Li, LUO Jinglan, BAO Zhidong. Sedimentary characteristics and controlling factors of slump gravity flow in delta front: a case study of Qing 1 member in Da'an area,Songliao Basin[J]. Lithologic Reservoirs, 2021, 33(1): 198–208.

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三角洲前缘滑塌型重力流沉积特征及控制因素——以松辽盆地大安地区青一段为例

Sedimentary characteristics and controlling factors of slump gravity flow in delta front: a case study of Qing 1 member in Da'an area,Songliao Basin

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