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<p>In the correction of Bouguer gravity anomaly data, the density of the intermediate stratum is the most important parameter for calculating the Bouguer gravity anomaly. Whether the selected density of the intermediate stratum is appropriate determines the degree of eliminating the influence of the intermediate stratum and the quality of the obtained Bouguer gravity anomaly data. This article focuses on the difficult problem of correcting the intermediate stratum of strongly heterogeneous surfaces under complex geological conditions. Starting from geological data and obtaining formation density data from logging data, a variable density intermediate stratum correction method for strongly heterogeneous surfaces is developed. The article explains the method of correcting the intermediate stratum of strongly heterogeneous surface. Based on the distribution of age strata in different surface areas in geological data, density zones are divided, and the density values for correcting the intermediate stratum are determined based on the density logging data corresponding to the age strata. The corrected Bouguer anomaly data removed the influence of inter-stratum heterogeneity. Through example verification, the removal of Bouguer anomalies affected by heterogeneous intermediate stratum provides reliable basic data for the separation of gravity anomaly information in the middle and deep stratum.</p>

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Variable Density Intermediate Stratum Gravity Correction Method for Heterogeneous and Complex Surface

  • 期刊论文

  • 发表日期：

    2025年7月1日

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  • Wentao Li,
  • Lili Zhang,
  • Guihong Xu,
  • Yuezao Liu,
  • Degen Lu,
  • Yun Cai,
  • Hewen Zhu,
  • Tongzhou Ji

摘要

In the correction of Bouguer gravity anomaly data, the density of the intermediate stratum is the most important parameter for calculating the Bouguer gravity anomaly. Whether the selected density of the intermediate stratum is appropriate determines the degree of eliminating the influence of the intermediate stratum and the quality of the obtained Bouguer gravity anomaly data. This article focuses on the difficult problem of correcting the intermediate stratum of strongly heterogeneous surfaces under complex geological conditions. Starting from geological data and obtaining formation density data from logging data, a variable density intermediate stratum correction method for strongly heterogeneous surfaces is developed. The article explains the method of correcting the intermediate stratum of strongly heterogeneous surface. Based on the distribution of age strata in different surface areas in geological data, density zones are divided, and the density values for correcting the intermediate stratum are determined based on the density logging data corresponding to the age strata. The corrected Bouguer anomaly data removed the influence of inter-stratum heterogeneity. Through example verification, the removal of Bouguer anomalies affected by heterogeneous intermediate stratum provides reliable basic data for the separation of gravity anomaly information in the middle and deep stratum.