地统计分析在海底管道路由三维地质建模中的应用  

Application of geostatistical analysis in 3D geological modeling of submarine pipeline route

作　　者：杨肖迪 淳明浩 徐爽 罗小桥 YANG Xiaodi;CHUN Minghao;XU Shuang;LUO Xiaoqiao(CNPC Research limited company of Engineering Technology,Tianjin 300451,China;CNPC Key Laboratory of Marine Engineering,Tianjin 300451,China)

机构地区：[1]中国石油集团工程技术研究有限公司,天津300451 [2]中国石油集团海洋工程重点实验室,天津300451

出　　处：《石油工程建设》2023年第2期1-6,19,共7页Petroleum Engineering Construction

基　　金：中国石油天然气集团有限公司科学研究与技术开发项目(2021DJ2505)——海底管道智能施工与质量安全监测评价技术研究。

摘　　要：随着智慧管道工程的持续推进,对海底管道检测成果的表现形式也提出了新的要求。构建海底管道路由区三维地质模型可直观显示路由区地层结构以及海底管道与地层的空间关系,对海底管道管理具有重要意义。采用地统计分析方法,利用高斯半变异函数计算了海底水深点、地层数据点的块金值、基台值、偏基台值、变程。根据块金值、偏基台值和变程采用克里金模型生成预测海底和地层的预测曲面,通过交叉验证评估了预测精度。结果表明,海底管道路由区海底地形复杂,插值形成的海底面拟合精度0.1 m;地层面整体较平滑,插值形成的地层面拟合精度优于0.04 m。构建的海底管道路由区三维地质模型能够精确反映地层结构以及海底管道与地层的空间关系。With the continuous advancement of the smart pipeline project,new requirements have been put forward for the manifestation of the subsea pipeline inspection results.Building a three-dimensional(3D)geological model of the submarine pipeline routing area can directly display the stratum structure and the spatial relationship between the submarine pipeline and the stratum,which is of great significance to the management of the submarine pipeline.In this paper,the nugget,sill,partial sill and the range of the seabed water depth point and the stratum data point were calculated by using the Gaussian semivariogram and geostatistical analysis methods.According to the nugget,partial sill and range,the Kriging model was used to generate the prediction surface of seabed and stratum,and the prediction accuracy is was evaluated through cross validation.The results show that the seafloor topography in the submarine pipeline routing area is complex,and the fitting accuracy of the interpolated seabed surface is 0.1m;and the stratigraphic surface is relatively smooth,and the fitting accuracy of the interpolated stratigraphic surface is superior to 0.04m.The 3D geological model of submarine pipeline routing area is constructed,which can accurately reflect the stratum structure and the spatial relationship between submarine pipeline and stratum.

关 键 词：半变异函数 高斯模型 克里金模型 交叉验证 海底管道 

分 类 号：TE973.92[石油与天然气工程—石油机械设备]