论文详情
传统河流相复合砂体构型界面建模方法多基于多井解释和沉积模式分析,丰富的三维空间地震信息未能有效地参与约束建模过程。因此提出了一种基于三维地震数据构型界面建模方法,该方法首先提取目的层油藏位置与构型界面相关的地震平面属性,将平面属性转换成二维图形,利用数学形态学将条状的构型界面转化成线状界面,再通过人工或霍夫变换方法拾取线段性界面,实现界面的数字化,然后将这些二维线段插入到油藏模型中,最终建立含构型界面模型。海上高品质地震资料为该方法的应用提供了数据支持。所构建的构型界面为垂直界面,简化了实际界面的空间产状,提供了一种新的建模思路。以渤海Q油田为例,详细阐述了构型界面建模的过程。基于三维地震数据的构型界面建模方法为非均质复合砂体油藏渗流机理研究和剩余油分布预测提供了一种新的研究思路。
Architecture interfaces are widely developed between complex fluvial sand units.These interfaces have low permeability and prevent the mobility of the fluid,thereby causing strong heterogeneity in reservoirs.The occurrence of such interfaces is one of the main reasons prventing the development of the remaining oil.Reservoir modeling that accounts for architecture interfaces and fluid simulations is an effective tool for understanding the flow mechanism and predicting the remaining oil.The traditional approach to model architecture interfaces is primarily based on the interpretation of multiple well data and the analysis of the sedimentary pattern;however,this approach does not consider three-dimensional (3D) seismic information.In this study,a novel approach was proposed to model architecture interfaces by incorporating 3D seismic data.First,seismic attributes related to the architecture interfaces were extracted and converted into a two-dimensional pixel map.The strip-shaped architecture interfaces in the map were then converted into pixel lines through an erosion process that is utilized in mathematical morphology.The interface lines were then automatically picked by the Hugh transform or manually modified and stored for reservoir modeling.High-quality offshore seismic data are a suitable input for the proposed approach.The approach was applied in the Baohai Q oilfield to demonstrate the modeling steps in detail.In summary,the proposed approach only relies on 3D seismic data,and provides new insights into the fluid flow mechanism and remaining oil prediction.
国家资源科学基金面上项目(41874167)和海洋石油高效开发国家重点实验室开放基金项目(2018OT-JY09)共同资助。