岩性油气藏 ›› 2018, Vol. 30 ›› Issue (6): 98–108.doi: 10.12108/yxyqc.20180612

• 技术方法 • 上一篇    下一篇

塔河油田蓬莱坝组异常地震特征及地质成因分析

苑雅轩1,2, 樊太亮1,2, 苑学军3, 张赫航1,2, 汪佳蓓1,2, 罗成1,2, 闫昕宇1,2   

  1. 1. 中国地质大学(北京) 能源学院, 北京 100083;
    2. 海相储层演化与油气富集机理教育部重点实验室, 北京 100083;
    3. 中国石油集团东方地球物理公司 海洋物探处, 天津 300280
  • 收稿日期:2018-02-26 修回日期:2018-04-03 出版日期:2018-11-16 发布日期:2018-11-16
  • 第一作者:苑雅轩(1994-),女,中国地质大学(北京)在读硕士研究生,研究方向为层序地层学与油气田开发地质。地址:(100083)北京市海淀区学院路29号中国地质大学(北京)。Email:yuan_yaxuan@163.com
  • 通信作者: 樊太亮(1961-),男,博士,教授,博士生导师,主要从事层序地层学与油藏描述方面的教学和科研工作。Email:fantl@cugb.edu.cn。
  • 基金资助:
    国家重大科技专项“塔里木盆地深层超深层寒武系层序地层与源盖分布”（编号：2017ZX05005002-003）和“深层碳酸盐岩储层发育动力学机制”（编号：2017ZX05009-002）、中国石化科技部科技攻关项目“塔河油田深层储层成因、成藏规律与目标优选”（编号：P15030）资助

Characteristics and geological genesis of anomalous seismic facies of Penglaiba Formation in Tahe Oilfield

YUAN Yaxuan1,2, FAN Tailiang1,2, YUAN Xuejun3, ZHANG Hehang1,2, WANG Jiabei1,2, LUO Cheng1,2, YAN Xinyu1,2   

  1. 1. School of Energy, China University of Geosciences, Beijing 100083, China;
    2. Key Laboratory of Marine Reservoir Evolution and Hydrocarbon Enrichment Mechanism, Ministry of Education, Beijing 100083, China;
    3. Department of Offshore Geophysical Prospecting, Bureau of Geophysical Prospecting, China National Petroleum Corporation, Tianjin 300280, China
  • Received:2018-02-26 Revised:2018-04-03 Online:2018-11-16 Published:2018-11-16

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摘要： 为寻找塔河油田奥陶系蓬莱坝组优质白云岩储层，利用三维地震资料与正演模拟开展了异常地震特征识别，并进行了地质成因分析。结果表明：①蓬莱坝组异常地震特征表现为多层、短连续的强反射，外部形态为块状或层状，分布于断裂单侧或双侧，纵向受层位约束，多终止于蓬莱坝组顶部不整合面之下；②强反射地震相总体上发育于构造主体部位，平面上呈3个有利区带，其中在塔河油田中北部与西北部均较发育，展布方向与深大断裂一致，呈NE与NNW向；③强反射地震相的主要成因机制为断裂-热液作用，其宏观上受控于构造格局，发育于构造高部位，深大断裂是热液流体的主要运移通道，向上终止于上覆的致密盖层。因此，蓬莱坝组优质白云岩储层为热液成因，强反射特征为该套优质白云岩储层在地震上的重要识别标志。

关键词: 强反射地震相, 深大断裂, 热液白云岩, 蓬莱坝组, 塔河油田

Abstract: In order to find high-quality dolomite reservoirs of the Ordovician Penglaiba Formation in Tahe Oilfield, three-dimensional seismic data and forward modeling were used to identify the anomalous seismic features, and geological genesis analysis was carried out. The results show that: (1)the anomalous seismic facies of Penglaiba Formation are characterized by multi-layered, short-continuous strong reflection, massive or layered external forms, distributed on one or both sides of faults, longitudinally constrained by horizon, and mostly terminated under the unconformity surface at the top of Penglaiba Formation. (2)The strong reflection seismic facies generally developed in the main part of the structure, and there are three favorable zones on the plane, which are relatively developed in the north-central and northwestern Tahe Oilfield. The distribution direction is consistent with deepfaults, showing NE and NNW directions. (3)Fault-hydrothermal process is the main genetic mechanism of the strong reflection seismic facies which is macroscopically controlled by tectonic framework and developed in the high part of structure. The deep faults are the main transport channels of hydrothermal fluids and terminate upwards in the overlying tight caprock. Therefore, high-quality dolomite reservoirs developed in Penglaiba Formation are of hydrothermal genesis, and the strong seismic reflection is an important seismic identification mark for high-quality dolomite reservoirs.

Key words: strong reflection seismic facies, deep faults, hydrothermal dolomite, Penglaiba Formation, Tahe Oilfield

中图分类号: 

  • P613.4
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