时频电磁法(Time and Frequency Electric Method,简称TFEM)作为一种新的勘探技术已逐渐应用于实际生产,它对油气有利区预测、钻井成功率提高等方面具有重要的促进作用。为了提高TFEM方法解释的可靠性,降低勘探的风险,在以往的极化率电...时频电磁法(Time and Frequency Electric Method,简称TFEM)作为一种新的勘探技术已逐渐应用于实际生产,它对油气有利区预测、钻井成功率提高等方面具有重要的促进作用。为了提高TFEM方法解释的可靠性,降低勘探的风险,在以往的极化率电阻率(Induced Polarizability and Resistivity,简称IPR)解释系统的基础上,加入振幅(Amplitude)和相位(Phase),形成了幅相-极化率电阻率(Amplitude and Phase–Induced Polarizability and Resistivity,简称AP-IPR)解释系统。该新系统不仅丰富了解释参数,提高了油气指向性;而且它规范了解释流程,缩短了解释周期,提高了解释的准确性,赢得了更大的应用范围。展开更多
In an effort to reduce the shale gas exploration risks and costs, we applied the wide-field electromagnetic method （WFEM）, because of its strong anti-interference capability, high resolution, ability to conduct expl...In an effort to reduce the shale gas exploration risks and costs, we applied the wide-field electromagnetic method （WFEM）, because of its strong anti-interference capability, high resolution, ability to conduct exploration at large depths, and high efficiency, to the Bayan Syncline in the South Huayuan block, Hunan Province. We collected rock samples and analyzed their resistivity and induced polarization （IP） and built A series of two-dimensional models for geological conditions to investigate the applicability of WFEM to different geological structures. We also analyzed the correlation between TOC of shale and the resistivity and IP ratio to determine the threshold for identifying target formations. We used WFEM to identify the underground structures and determine the distribution, depth, and thickness of the target strata. Resistivity, IP, and total organic carbon were used to evaluate the shale gas prospects and select favorable areas （sweet spots） for exploration and development. Subsequently, drilling in these areas proved the applicability of WFEM in shale gas exploration.展开更多
文摘时频电磁法(Time and Frequency Electric Method,简称TFEM)作为一种新的勘探技术已逐渐应用于实际生产,它对油气有利区预测、钻井成功率提高等方面具有重要的促进作用。为了提高TFEM方法解释的可靠性,降低勘探的风险,在以往的极化率电阻率(Induced Polarizability and Resistivity,简称IPR)解释系统的基础上,加入振幅(Amplitude)和相位(Phase),形成了幅相-极化率电阻率(Amplitude and Phase–Induced Polarizability and Resistivity,简称AP-IPR)解释系统。该新系统不仅丰富了解释参数,提高了油气指向性;而且它规范了解释流程,缩短了解释周期,提高了解释的准确性,赢得了更大的应用范围。
基金financially supported by the Thirteenth Five-Year-Plan Major Project "Marine Shale Gas Exploration and Evaluation over Laifengxianfeng and Hefeng Block"(No.2016ZX05034004-004)China Huadian Engineering Co.,LTD(No.CHEC-KJ-2014-Z10)
文摘In an effort to reduce the shale gas exploration risks and costs, we applied the wide-field electromagnetic method （WFEM）, because of its strong anti-interference capability, high resolution, ability to conduct exploration at large depths, and high efficiency, to the Bayan Syncline in the South Huayuan block, Hunan Province. We collected rock samples and analyzed their resistivity and induced polarization （IP） and built A series of two-dimensional models for geological conditions to investigate the applicability of WFEM to different geological structures. We also analyzed the correlation between TOC of shale and the resistivity and IP ratio to determine the threshold for identifying target formations. We used WFEM to identify the underground structures and determine the distribution, depth, and thickness of the target strata. Resistivity, IP, and total organic carbon were used to evaluate the shale gas prospects and select favorable areas （sweet spots） for exploration and development. Subsequently, drilling in these areas proved the applicability of WFEM in shale gas exploration.
