岩性折剖面自识别可视化算法在安塞油田的应用

The Application of Automatically Identified and Visual Algorithm for Folded Lithologic Cross-section in Ansai Oil Field

针对低渗透油气藏精细化描述对三维可视化的精准度要求高的问题,以鄂尔多斯盆地安塞油田XX加密区低渗透油层组为例,研究岩性折剖面的自识别可视化控制算法,解决可视化精度问题。利用纹理映射和质量控制的方法,将岩性符号准确、平滑地渲染到安塞油田XX加密区的油藏剖面上,划分对比油层剖面,完善油藏的精细描述。研究结果表明,文中方法可以自动识别油藏建模中的剖面多边形,同时对岩性纹理映射进行双方向控制,有效解决岩性符号变形与拉伸的问题,准确表达安塞油田剖面的不同岩性。研究成果对低渗透油藏建模和勘探开发具有重要意义。

As the requirement on accuracy of 3D visualization from the fine description of low permeability reservoirs, the low permeability oil zones in XX infilled drilling block in Ansai Oil Field, Ordos Basin, are used as examples to investigate automatically identified and visual controlling algorithm for folded lithologic cross-section and solve the accuracy of visualization. Texture mapping and quality control methods are used to render the lithologic symbols accurately and smoothly on the reservoir profile of XX infilled drilling block in Ansai oil field, classify and compare profile of oil zones and complete fine description of the reservoir. The investigation results show that these methods can automatically identify the profile polygons in reservoir modelling, achieve dual direction control on lithologic texture mapping, effectively solve the issues of lithologic symbol deformation and stretching and accurately express different lithology on the profile of Ansai oil field. The research results are important to the modelling, exploration and development of low permeability reservoirs.