塔里木盆地亚肯北三维浮动基准面解释建模技术

Interpretation and modeling technology based on 3d floating datum, northern Yaken, Tarim Basin

范伟峰 李春雷 蒋进勇

Fan Weifeng Li Chunlei Jiang Jinyong

中国石油化工股份有限公司 西北油田分公司 勘探开发研究院,乌鲁木齐 830011

Research Institute of Petroleum Exploration and Production, SINOPEC Northwest Oilfield Company, Urumqi, Xinjiang 830011, China

塔里木盆地亚肯北三维地震工区地表起伏大，速度预测难度大。采用新开发的切片堆积法浮动基准面速度建模技术进行了一系列改进。基于浮动基准面建模避免迁移误差，利用压实速度规律填充速度谱浅部空白段，利用平均层速度计算层厚度补偿平均速度偏大情况，基于等时速度切片剔野值、平滑避免对解释层位的依赖，新技术解释深度对井误差标准偏差为123 m，相对误差为2.19%。新推导的平均静校正量法浮动基准面计算公式表明，替换速度偏大致浮动基准面高于地表，基准面补偿至地表（长波长静校正）后对井误差标准偏差降为46 m，相对误差降为1.59%。基于新编制的构造图落实了亚肯北1号构造。

In the northern Yaken of the Tarim Basin, the surface of 3d work area fluctuates obviously, making it difficult for velocity prediction. Improvements have been made with the newly-designed velocity modeling technology based on floating datum. Migrating error is avoided. The regularity of compaction velocity is used to fill the gap for velocity spectrum data in the shallow. The use of average interval velocity to calculate thickness avoids the problem of bigger average velocity. Ticking outliers based on isochronous speed sliced, the dependence on interpretation layer is avoided smoothly. The interpretation depth with the new method has a standard deviation of 123 m from well, which is 2.19% of relative error. The new-derived equation shows that a larger replacement velocity causes floating datum higher than surface. After the floating datum is compensated to the surface (long wavelength static correction,) the standard deviation decreases to 46 m and the relative error is 1.59%. The new technology implements the structure of Ykb1.

https://doi.org/10.11781/sysydz2013S1004