叠前深度偏移在复杂地区的应用

Application of prestack depth migration in complex areas

1. 南京理工大学,江苏南京210014;2. 中国石化石油勘探开发研究院南京石油物探研究所,江苏南京210014

1. Nanjing University of Science & Technology, Nanjing 210014, China;2. Institute of Geophysical Prospecting, SINOPEC Research Institute of Petroleum Exploration and Development, Nanjing 210014, China

简要介绍了叠前深度偏移 (PSDM)的方法技术, 主要包括叠前深度偏移成像, 旅行时计算和速度模型建立3个部分。将叠前深度偏移技术应用于 3个有代表性的复杂构造地区, 其结果在断层显示的清晰度、断块识别的准确度以及高速盐体的边界成像精度等方面均有明显的提高。

Prestack depth migration (PSDM) is briefly described, which consists of prestack depth migration imaging, traveltime calculation and construction of velocity model. The PSDM was applied to three complex structure regions, which resulted in a clearer and more accurate image for faults and higher imaging precision for high velocity salt boundary. The PSDM results allowed for high precise geologic and structural interpretation in complex regions.