浅水三角洲前缘亚相储层沉积特征及沉积模式——以大庆长垣萨北油田北二区萨葡高油层为例

doi:10.12108/yxyqc.20220101

岩性油气藏 ›› 2022, Vol. 34 ›› Issue (1): 1–13.doi: 10.12108/yxyqc.20220101

• 油气地质 • 下一篇

浅水三角洲前缘亚相储层沉积特征及沉积模式——以大庆长垣萨北油田北二区萨葡高油层为例

刘宗堡¹, 李雪¹, 郑荣华², 刘化清³, 杨占龙³, 曹松⁴

1. 东北石油大学地球科学学院, 黑龙江大庆 163318;
2. 中国石油华北油田分公司勘探开发研究院, 河北任丘 062552;
3. 中国石油勘探开发研究院西北分院, 兰州 730020;
4. 中国石油华北油田分公司第五采油厂, 河北辛集 052360

收稿日期:2021-07-25 修回日期:2021-10-18 出版日期:2022-01-01 发布日期:2022-01-21
第一作者:刘宗堡(1982-),男,博士,教授,主要从事储层沉积学及油气成藏机理等方面的教学与研究工作。地址:(163318)黑龙江省大庆市高新技术产业开发区学府街99号。Email:lzbdqpi@163.com。
基金资助:
国家自然科学基金项目“基于储层构型理论解析的三角洲相致密砂岩储集性多级次表征研究”（编号：42172161）和黑龙江省优秀青年科学基金项目“基于构型理论的三角洲相致密砂岩储层储集性多尺度表征”（编号：YQ2020D001）联合资助

Sedimentary characteristics and models of shallow water delta front subfacies reservoirs: A case study of Sapugao oil layer in north-Ⅱ block of Sabei oilfield, Daqing placanticline

LIU Zongbao¹, LI Xue¹, ZHENG Ronghua², LIU Huaqing³, YANG Zhanlong³, CAO Song⁴

1. College of Geoscience, Northeast Petroleum University, Daqing 163318, Heilongjiang, China;
2. Research Institute of Exploration and Development, PetroChina Huabei Oilfield Company, Renqiu 062552, Hebei, China;
3. PetroChina Research Institute of Petroleum Exploration & Development-Northwest, Lanzhou 730020, China;
4. No.5 Oil Production Plant, PetroChina Huabei Oilfield Company, Xinji 052360, Hebei, China

Received:2021-07-25 Revised:2021-10-18 Online:2022-01-01 Published:2022-01-21

摘要/Abstract

摘要： 浅水三角洲前缘亚相储层是中国主力油田增储稳产的主要对象，为了深入探究储层砂体分布特征，以大庆长垣萨北油田北二区萨葡高油层为例，采用密井网资料对65个时间单元沉积微相进行研究，分别建立了该区物源供给充足和物源供给不充足2种情况下浅水三角洲前缘亚相储层砂体沉积模式。结果表明：①萨葡高油层发育大型浅水三角洲前缘亚相，具有岩性细、砂泥互层、间断正韵律、垂向相序不完整、水下分流河道为骨架和河口坝不发育的特征。②萨葡高油层三角洲内前缘亚相水下分流河道分为近岸宽带型、中岸窄带型和远岸断枝型，沿物源方向分流角逐渐增加、分叉角先增加后减小和宽厚比逐渐减小。③萨葡高油层三角洲外前缘亚相受控于物源供给和波浪改造，席状砂分为厚而稳定型、厚而不稳定型、薄而稳定型和薄而不稳定型等4类，远砂坝分为厚而宽带型和薄而窄带型等2类。④萨葡高油层经历了湖平面早期高频振荡、中期缓慢下降和晚期快速上升的沉积演化序列；⑤物源供给充足时，水下分流河道延伸远且密度大、席状砂规模大、远砂坝发育；物源供给不充足时，水下分流河道延伸近且密度小、席状砂规模小、远砂坝不发育。该研究成果对指导类似岩性油气藏的勘探与开发具有借鉴意义。

关键词: 浅水三角洲前缘, 沉积特征, 沉积模式, 萨葡高油层, 萨北油田, 松辽盆地

Abstract: Shallow water delta front subfacies reservoir is an important research field for reservoir increase and production stabilization in China's main oil fields. In order to further explore the distribution characteristics of reservoir sand bodies,the sedimentary microfacies of 65 units of Sapugao oil layer in north-Ⅱ block of Sabei oilfield,Daqing placanticline were studied by using dense well pattern data,the sedimentary models of shallow water delta front subfacies reservoirs were established under the conditions of sufficient and insufficient provenance supply respectively. The results show that:(1) The Sapugao oil layer develope large shallow water delta front subfacies,which are characterized by fine lithologies,interbedded sand and mud,discontinuous positive rhythm,incomplete vertical facies sequence,subaqueous distributary channel as framework and undeveloped mouth bar. (2) The subaqueous distributary channels can be divided into nearshore broad-band type,middle shore narrowband type and far shore broken branch type. The distributary angle gradually increases,the bifurcation angle first increases and then decreases,and the width to thickness ratio gradually decreases along the provenance direction. (3) The outer front subfacies are controlled by source supply and wave transformation. The sheet sands were divided into thick and stable type,thick and unstable type,thin and stable type,thin and unstable type. The distal sand bars were divided into thick and wide band type,thin and narrow band type.(4) The Sapugao oil layer experienced a sedimentary evolution sequence of high-frequency oscillation in the early stage,slow decline in the middle stage and rapid rise in the late stage.(5) When the source supply is sufficient,the subaqueous distributary channel extends far and has high density,and the sheet sand scale is large and the distal sand bar is developed. When the source supply is insufficient,the subaqueous distributary channel extends near and has low density,and the sheet sand scale is small and the distal sand bar is undeveloped. The research results have reference significance for guiding the exploration and development of similar lithologic reservoirs.

Key words: shallow water delta front, sedimentary characteristics, sedimentary model, Sapugao oil layer, Sabei oilfield, Songliao Basin

中图分类号:

TE122.2

刘宗堡, 李雪, 郑荣华, 刘化清, 杨占龙, 曹松. 浅水三角洲前缘亚相储层沉积特征及沉积模式——以大庆长垣萨北油田北二区萨葡高油层为例[J]. 岩性油气藏, 2022, 34(1): 1–13.

LIU Zongbao, LI Xue, ZHENG Ronghua, LIU Huaqing, YANG Zhanlong, CAO Song. Sedimentary characteristics and models of shallow water delta front subfacies reservoirs: A case study of Sapugao oil layer in north-Ⅱ block of Sabei oilfield, Daqing placanticline[J]. Lithologic Reservoirs, 2022, 34(1): 1–13.

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浅水三角洲前缘亚相储层沉积特征及沉积模式——以大庆长垣萨北油田北二区萨葡高油层为例

Sedimentary characteristics and models of shallow water delta front subfacies reservoirs: A case study of Sapugao oil layer in north-Ⅱ block of Sabei oilfield, Daqing placanticline

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