| 彭军.构造成图时深转换方法[J].地质与勘探,2020,56(2):411-417 |
| 构造成图时深转换方法 |
| Time-depth conversion methods in preparation of structural maps |
| 投稿时间：2018-10-15 修订日期：2019-09-05 |
| DOI：10.12134/j.dzykt.2020.02.015 |
| 中文关键词: 时深转换 时深对 拟合 速度体 剥层 |
| 英文关键词: time to depth conversion , time depth pair , fitting , velocity body , layer-stripped |
| 基金项目:科技重大专项南海西部海域低渗透油藏甜点储层识别与描述研究（编号：2016ZX05024-006-002）资助 |
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| 中文摘要: |
| 绝大多数地震资料构造解释是在时间域完成的，而地质人员使用的资料为深度域资料，因此时深转换方法就必不可少。时深转换有多种方法，不同方法应用范围不同，复杂程度各异。对各类时深转换方法流程进行了详细叙述，并对常用时深转换方法适用的地质条件进行了阐述。通过对实际油田时深转换方法的运用,时深拟合法对浅层速度横向变化较小的地层进行时深转换所得构造相对误差小于2‰，表明时深拟合法对该类地层时深转换精度高；对于有速度异常地层、速度横向变化较大地层时深转换时选择合适的方法也能有效提高构造成果准确度。描述了各类时深转换方法优缺点，由于地震资料本身分辨率及速度精度的限制，根据不同的地质情况，选择合适的时深转换方法，才能提高构造成果的精度，减少地质认识风险。 |
| 英文摘要: |
| Most of structural interpretations of seismic data are made in the time domain, while data used by geologists are in the depth domain, so time-depth conversion of data is essential. There are many methods for time-depth conversion, which have different application ranges and varied degrees of complexity. This paper presents commonly used time-depth conversion methods and their geological conditions applicable. The application of the time-depth conversion methods in an oil field shows that the relative error of time-depth fitting method is less than 2‰ and the time-depth conversion accuracy is high, which can also be effectively improved by selecting appropriate methods for strata with velocity anomalies strata and large lateral velocity variation. The advantages and disadvantages of each method are described. In order to improve the precision of the structural maps and reduce the risk in geologic interpretation, suitable time depth conversion methods should be chosen according to the different geological conditions due to the limitations of the resolution and velocity accuracy of seismic data itself. |
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