西南石油大学学报(自然科学版) ›› 2019, Vol. 41 ›› Issue (2): 10-22.DOI: 10.11885/j.issn.1674-5086.2018.01.10.01

• 地质勘探 • 上一篇    下一篇

磨溪-高石梯区块断层对裂缝分布的控制作用

徐珂, 戴俊生, 冯建伟, 任启强   

  1. 中国石油大学(华东)地球科学与技术学院, 山东 青岛 266580
  • 收稿日期:2018-01-10 出版日期:2019-04-10 发布日期:2019-04-10
  • 通讯作者: 徐珂,E-mail:xukee0505@163.com
  • 作者简介:徐珂,1991年生,男,汉族,四川遂宁人,博士研究生,主要从事储层构造裂缝预测与地应力方面的研究工作。E-mail:xukee0505@163.com;戴俊生,1958年生,男,汉族,山东寿光人,教授,博士生导师,主要从事构造地质学方面的教学与研究工作。E-mail:Daijsh3@163.com;冯建伟,1979年生,男,汉族,山东临朐人,副教授,博士,主要从事构造地质学方面的教学与研究工作。E-mail:linqu_fengjw@163.com;任启强,1990年生,男,汉族,安徽宿州人,博士研究生,主要从事储层构造裂缝预测的研究工作。E-mail:rqq1990@126.com
  • 基金资助:
    国家自然科学基金(41572124);国家科技重大专项(2016ZX05047003-003)

Fault System and Its Controlling Effect on Fracture Distribution in Moxi-Gaoshiti Block, Sichuan Basin, China

XU Ke, DAI Junsheng, FENG Jianwei, REN Qiqiang   

  1. School of Geoscience, China University of Petroleum(East China), Qingdao, Shandong 266580, China
  • Received:2018-01-10 Online:2019-04-10 Published:2019-04-10

摘要: 为了查明磨溪-高石梯区块断层展布与裂缝分布特征,以地质力学理论为指导,利用地震、测录井、岩芯及相关实验测试资料,识别不同断层类型,划分断层级别,开展裂缝定量预测工作,建立断层与裂缝分布关系模式。结果表明,磨溪-高石梯区块断层在纵向上规模大,延伸长,断开层位多,具有明显的分层性,可划分为3个构造层,且在平面上具有显著的分区性和分带性。不同规模、走向及性质的断层对裂缝的分布影响显著,裂缝密度普遍在1.5~5.0条/m,最高为7.0条/m,高值区主要分布于断层及其周缘。裂缝开度在断层发育带最高可达3 mm。磨溪-高石梯区块是一套断层-裂缝共生系统,主断裂控制次级断裂及裂缝的发育,次级断层控制局部裂缝发育。

关键词: 断层分析, 裂缝分布, 数值模拟, 龙王庙组, 磨溪-高石梯区块

Abstract: In order to determine the fault and fracture distribution characteristics of the Moxi-Gaoshiti block, faults were classified into different types and levels based on geomechanical theory and seismic, logging, core, and relevant experimental data. Fractures were quantitatively predicted, and the relationship between the distributions of faults and fractures was established. The results showed that the faults in the Moxi-Gaoshiti block have a large scale in the vertical direction, long extensions, a large number of disconnected layers, and obvious delamination. They can be divided into 3 structural layers, and have significant plane partitioning and banding. Faults with different scales, directions, and characteristics have significant influences on fracture distribution. Fracture density is generally 1.5~5.0/m with a maximum of 7.0/m. Zones with high values are primarily distributed in the fault and its periphery. The maximum fracture opening in the fault development zone can reach 3 mm. The Moxi-Gaoshiti block is a fault-fracture symbiotic system. The primary fault controls the development of secondary faults and fractures, and the secondary fault controls the development of local fractures.

Key words: fault analysis, fracture distribution, numerical simulation, Longwangmiao formation, Moxi-Gaoshiti block

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