城区高密度三维地震资料保真处理技术及其效果

Fidelity Processing for High Density 3D Seismic Data and Its Effects in the Urban Areas

萨尔图油田高密度三维地震是国内外首次在有着近五十年开采史的老油区和大面积现代化城区开展的高密度三维地震项目。针对油区、城区的复杂多变的表层条件、多种类型的油田设施干扰、城区小药量采集造成的子波、能量差异大以及地质要求高等特点,形成了以高精度的静校正、叠前噪音去除、相对保持振幅及各向异性叠前偏移为基础的高精度处理技术,取得了理想的效果。

High density 3D seismics in Saertu Oilfield is the first high density 3D seismic project which are developed both in a maturing oil region with 50 years of production history and in the large modern urban areas at home and abroad.According to the complicated surface conditions in the oil regions and urban areas,various interferences from oilfield facilities,the wavelets caused by small charge acquisitions in the urban areas,big energy differences and high geologic requirements,the high accuracy processing technique are developed based on high accuracy static corrections,pre-stack noise removing,relative preserved amplitude and anisotropic pre-stack migrations,and good results are obtained.