奥里诺科重油带MPE-3区块Oficina组辫状河三角洲沉积相定量刻画
- 1. 中国石油大学(华东)地球科学与技术学院, 山东青岛 266580;
- 2. 中国石油勘探开发研究院, 北京 100083
基金项目:
国家科技重大专项（2016ZX05031001-001-003）
作者简介:
林承焰,男,1963年出生,博士,教授,油气藏开发地质,E-mail:lincy@upc.edu.cn
- 收稿日期:
2018-05-09
- 修回日期:
2018-06-28
- 刊出日期:
2019-06-10
摘要: 委内瑞拉盆地奥里诺科重油带MPE-3区块Oficina组辫状河三角洲沉积相定量刻画难度大，是制约该区块水平井高效开发的关键地质因素。在区域沉积背景研究的基础上，利用岩芯描述和分析化验资料，确定该地区为辫状河三角洲沉积，区内主要发育辫状河三角洲平原和三角洲前缘亚相，心滩、复合心滩坝、辫状河道、决口扇/溢岸、泛滥平原、水下分流河道、分流间湾、席状砂和潮汐砂坝等微相。综合利用地震和测井资料、现代沉积测量类比和经验公式等三种方法，实现了研究区主要沉积微相的定量刻画，认为辫状河河道带宽度介于1~5 km，水下分流河道宽度在1 km左右，建立了心滩宽与心滩长、心滩宽与辫状河道宽度、水下分流河道单河道宽度与深度之间关系的经验公式，进一步阐明了Oficina组沉积时期辫状河三角洲沉积演化规律，为提高研究区超重油油藏采出程度提供了重要地质依据。
Quantitative Description of the Braided River Delta Sedimentary Facies of the Oficina Formation in MPE-3 Block of the Orinoco Heavy Oil Belt
- 1. School of Geosciences, China University of Petroleum(East China), Qingdao, Shandong 266580, China;
- 2. Research Institute of Petroleum Exploration and Development, Petro China, Beijing 100083, China
Funds:
National Science and Ttechnology Major Project,No.2016ZX05031001-001-003
- Received Date:
2018-05-09
- Rev Recd Date:
2018-06-28
- Publish Date:
2019-06-10
Abstract: Quantitative description of braided river delta sedimentary facies of the Oficina Formation in MPE-3 block of the Orinoco heavy oil belt in Venezuela Basin is difficult, which is the key geological factor restricting the efficient development of horizontal wells in this block. Based on the study of regional sedimentary background, it shows that the braided river delta deposits dominates this area which is determined by core description and analysis of laboratory data,mainly developing the subfacies of braided river delta plain and delta front and microfacies such as the mid-channel bar, composite mid-channel bar, braided channel, splay/overflow, flood plain, underwater distributary channel, interdistributary bay, sand sheet and tidal sand bar. Quantitative characterization of major sedimentary microfacies in the study area has been achieved by using three methods:seismic and logging data, analogy of modern sedimentary surveys and empirical formulas. The results suggest that the width of braided channel ranges from 1 km to 5 km, and the width of underwater distributary channel is about 1 km. Empirical formulas between the width and length of the heart beach, the width of the heart beach and the braided channel, the width and depth of the single channel of the underwater distributary channel are established, and the evolution law of the braided river delta during the deposition of the Oficina Formation is further clarified. The research results provide an important geological basis for improving the recovery degree of super heavy oil reservoirs in the study area.
林承焰, 程盼, 任丽华, 张静, 李宗奇, 刘书亭, 黄文松. 奥里诺科重油带MPE-3区块Oficina组辫状河三角洲沉积相定量刻画[J]. 沉积学报, 2019, 37(3): 610-622. doi: 10.14027/j.issn.1000-0550.2018.147
LIN ChengYan, CHENG Pan, REN LiHua, ZHANG Jing, LI ZongQi, LIU ShuTing, HUANG WenSong. Quantitative Description of the Braided River Delta Sedimentary Facies of the Oficina Formation in MPE-3 Block of the Orinoco Heavy Oil Belt[J]. Acta Sedimentologica Sinica, 2019, 37(3): 610-622. doi: 10.14027/j.issn.1000-0550.2018.147
| Citation: |
LIN ChengYan, CHENG Pan, REN LiHua, ZHANG Jing, LI ZongQi, LIU ShuTing, HUANG WenSong. Quantitative Description of the Braided River Delta Sedimentary Facies of the Oficina Formation in MPE-3 Block of the Orinoco Heavy Oil Belt[J]. Acta Sedimentologica Sinica, 2019, 37(3): 610-622. doi: 10.14027/j.issn.1000-0550.2018.147
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