油田开发方案设计阶段储集层地质模型的建立

Building reservoir model at the design phase of oilfield development plan.

储集层地质模型是油藏描述工作的最终成果 ,在开发方案设计阶段 ,建立概念模型向静态模型过渡的地质模型已成为一种发展方向。油田开发初期由于钻井较少 ,仅仅依靠测井资料难以建立准确的地质模型 ,因此提出综合利用地震、地质和测井信息并应用地质统计学油藏描述软件GRIDSTAT建立储集层地质模型的方法 ,将地质认识定量化。其步骤是先将地震纯波数据体直接反演成孔隙度数据体 ,再以地震得到的孔隙度数据体为背景 (“软数据”)、以井点实测孔隙度值为“硬数据” ,应用地质统计方法将软、硬数据以及地质家对储集层分布的认识 (储集层沉积相 )相结合 ,建立精细的储集层孔隙度模型。给出了应用该方法建立渤海南堡 3 5 2油田储集层地质模型的实例。图 5参

Reservoir model is the final result of reservoir description, which is the basis of numerical reservoir simulation. The more precise conceptual model can be built in designation phase of field development plan. There are only few wells in this phase, so it is very difficult to build very accurate reservoir model just by log data. This paper presents a novel method used to build reservoir model, which can integrate seismic data, log data and geology data using geostatistics software GRIDSTAT. First, seismic data volume were directly inverted to porosity. Second,“hard data” (log data),“soft data” (seismic data) and the geologist's view to reservoir distribution (reservoir sedimentary faces) are integrated to build reservoir model by geostatistics method. Integrating all kinds of geological information of reservoir distribution to build reservoir model is the apparently merit of this method, which provides more precise reservoir model to reservoir engineering, quantifies the geological conception, and is useful for making field development plan. The reservoir model of Nanpu35 2 oil field was built by this method, which accurately described the reservoir distribution and met the need of reservoir simulation and designation of field development plan.