Scholarlink

<p>During exploration and development of coalbed methane (CBM) reservoirs, seismic resolution is critical for accurate reservoir characterization. This study addresses seismic resolution requirements for CBM and proposes three complementary high-resolution processing techniques. In the pre-stack stage, an offset-dependent absorption-compensation procedure is applied to Common Reflection Point (CRP) gathers to correct offset-related frequency and amplitude variations induced by seismic absorption. Building on this, a multi-dimensional constrained Dynamic Time Warping (DTW) algorithm is used to reduce offset-dependent discrepancies in reflection travel time and reflection waveform caused by velocity errors and waveform stretching in CRP gathers. In the post-stack stage, a spatially reflective-structure-regularized multichannel deconvolution scheme is implemented to suppress noise amplification during deconvolution and to improve recovery of high-frequency signal components. These techniques were applied to field seismic data from the Ordos Basin; results show enhanced resolution and improved seismic characterization of CBM reservoirs.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Seismic data processing key technology for coalbed methane reservoir

  • 期刊论文

  • 发表日期：

    2026年1月29日

查看全文
  • Ming Zhang,
  • Bao-yin Zhao,
  • Zhi-fang Ran,
  • Wen-wu Shi,
  • Hao Li,
  • Kai-long Wu,
  • Gen-yang Tang

摘要

During exploration and development of coalbed methane (CBM) reservoirs, seismic resolution is critical for accurate reservoir characterization. This study addresses seismic resolution requirements for CBM and proposes three complementary high-resolution processing techniques. In the pre-stack stage, an offset-dependent absorption-compensation procedure is applied to Common Reflection Point (CRP) gathers to correct offset-related frequency and amplitude variations induced by seismic absorption. Building on this, a multi-dimensional constrained Dynamic Time Warping (DTW) algorithm is used to reduce offset-dependent discrepancies in reflection travel time and reflection waveform caused by velocity errors and waveform stretching in CRP gathers. In the post-stack stage, a spatially reflective-structure-regularized multichannel deconvolution scheme is implemented to suppress noise amplification during deconvolution and to improve recovery of high-frequency signal components. These techniques were applied to field seismic data from the Ordos Basin; results show enhanced resolution and improved seismic characterization of CBM reservoirs.