新疆石油地质

›› 2016, Vol. 37 ›› Issue (2): 1-1.doi: 10.7657/XJPG20160210

• 论文 •    

基于辫状河露头几何模型的小层对比方法及应用——以珠江口盆地A油田恩平组为例

居字龙1，唐辉1，刘伟新1，戴宗1，陈程2，李庆明1   

  1. (1.中海石油 深圳分公司研究院,广州 510240;2.中国地质大学 能源学院,北京 100083)
  • 出版日期:2019-01-01 发布日期:1905-07-13

SubLayer Correlation Method and Application Based on Braided River Outcrop Geometric Model: A Case Study of Enping Formation in Oilfield A, Pearl River Mouth Basin

JU Zilong1, TANG Hui1, LIU Weixin1, DAI Zong1, CHEN Cheng2, LI Qingmin1   

  1. (1. Shenzhen Branch Research Institute, CNOOC, Shenzhen, Guangdong 510240, China; 2. School of Energy, China University of Geosciences, Beijing 100083, China)
  • Online:2019-01-01 Published:1905-07-13

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摘要： 北京门头沟区军庄镇中侏罗统后城组露头存在辫状河分流河道横截面由河道中心向翼部逐渐减薄的现象，结合河道变迁体制，总结出分流河道横截面的几何模型:河道中心向两翼逐步减薄，呈非对称的“顶平底凸”半椭圆形。分别应用几何模型和传统的“砂对砂，泥对泥”的小层对比方法,对珠江口盆地A油田辫状河沉积体系的恩平组进行单砂体小层对比。研究结果表明，基于几何模型的小层对比方法，能通过辫状河河道的空间展布特征来解释等时地层横向井间砂体个数和砂体厚度的差异，及纵向上沉积中心的演化规律，较传统对比方法更适用于以辫状河为代表的复杂沉积体系。

Abstract: From the braided river outcrops of Houcheng formation of Middle Jurassic at Junzhuang town, Mentougou region in Beijing, it is observed the cross?section of the braided river distributary channel is characterized by gradual thinning of thickness from channel center to channel wings. Considering the channel changing system, this paper presents the geometric model of the cross?section is that besides the thinning feature, it appears the unsymmetric semi?ellipse with flat top and swell bottom. Using the geometric model and the conventional “sand to sand and shale to shale”sub?layer correlation methods, the correlation of single sand body sublayer of the Enping formation in oilfield?A braided river sedimentary system in Pearl River Mouth basin is conducted. The result shows that the geometric model?based sublayer correlation method can be applied to explain the lateral difference between sand body number and sand thickness of interwells and longitudinal evolution pattern of the sedimentary center through the spatial distribution characteristics of braided river channels, and is more applicable in study of complicated sedimentary system like braided river, compared with conventional sub?layer correlation method

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