岩性油气藏 ›› 2015, Vol. 27 ›› Issue (1): 115–121.doi: 10.3969/j.issn.1673-8926.2015.01.017

• 技术方法 • 上一篇    下一篇

柴达木盆地某油气聚集区电性结构研究

彭勇辉,李帝铨   

  1. 中南大学 地球科学与信息物理学院 , 长沙 410083
  • 出版日期:2015-02-03 发布日期:2015-02-03
  • 作者简介:彭勇辉( 1989- ),男,中南大学在读硕士研究生,研究方向为电磁法油气勘探。 地址:( 410083 )湖南省长沙市岳麓区中南大学本部逸夫楼 302B 。 E-mail : xbbh_cs@hotmail.com
  • 基金资助:

    中国石油重大科技专项“柴达木盆地建设千万吨油气田综合配套技术研究”(编号: 2012A-104 )资助

Study on electric structure in a hydrocarbon accumulation area, Qaidam Basin

  PENG YonghuiLI Diquan

    

  1.  School of Earth Science & Info-physics ,Central South University ,Changsha 410083 , China
  • Online:2015-02-03 Published:2015-02-03

摘要:

柴达木盆地某油气聚集区地质条件复杂,地震勘探效果不明显。 在该区布设了 5 条广域电磁法测线,采用 2 n 序列伪随机信号发射源和广域电磁法油气目标识别技术,研究了该区电性结构特征。 结果表明,该区存在 5 个主要电性层,产气层为高电阻率特征,产气层反演电阻率是非产气层的 2 倍以上。 反演
结果与钻井及地震资料对比证明,广域电磁法对油气层识别较有效。 由于施工简单,成本低,广域电磁法有一定的推广应用价值。

关键词: 泥页岩, 破裂压力, 压裂施工, 水化应力, 水力压裂, 岩石力学

Abstract:

The geological conditions in a hydrocarbon accumulation area of Qaidam Basin are complex, and the seismic exploration effect is not obvious. By applying wide field electromagnetic method, this paper conducted field experiment with five survey lines and studied the electric structure of the study area by a continuous periodic 2n sequence pseudo-random signal. The results show that five main electric layers exist and the gas layers perform relatively high electrical resistivity. The inversion resistivity values of the gas layers are two times more than that of non-gas layers. Comparing with the well drilling and seismic data, the wide field electromagnetic method is effective for oil and gas identification. Due to the simple field work and low costs, the value of wide field electromagnetic method is tremendous in popularization and application in Qaidam Basin.

Key words:  shale, fracture pressure, fracturing operation, hydration stress, hydraulic fracturing, rock mechanics



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