基于精细三维地质模型的压裂裂缝参数优化

Optimization Design of Integral Fracturing Parameters Based on Fine 3-D Geology Model

基于均质地质模型或概念模型的整体压裂裂缝参数优化方法未能考虑储层非均质性和砂体展布的影响,优化结果与储层匹配性较差。针对这一问题,开展了运用储层精细三维地质模型进行压裂裂缝参数优化的研究,采用精细地质建模技术,考虑储层物性和砂体展布在平面和纵向上变化,建立了储层精细三维地质模型,以地层系数和层系分布为依据对储层类型进行划分,针对不同类型储层,结合产量模型和经济评价模型进行了整体压裂裂缝参数优化,最终建立了整体压裂裂缝参数指导图版。由于在优化过程中将优化对象进行了细分,因此区块的最优裂缝参数并非常数,而是随储层类型的变化发生改变,优化结果更加符合实际。研究成果对于指导区块整体压裂设计具有重要的指导意义。

Based on the optimization method of integral fracturing parameter of the homogeneous geological model or con- ceptual model, in which the reservoir heterogeneity and distribution of sand bodies are not considered, hence, there is a poor match between optimization results and reservoir. To solve the problem, a fine reservoir 3-D geology model was applied to conduct fracture-parameter-optimization research. By the fine geological modeling technology with consideration of the change of reservoir properties and sand body distribution in the plane and longitudinal direction, the fine 3-D geology model has been established. According to the formation coefficient and the layer distribution, reservoir types have been divided. For different types of reservoirs, the optimization of integral fracturing parameters was conducted which was combined with production mod- els and economic evaluation mode. Finally guiding plates for integral fracturing parameters have been built. Because the object was subdivided, the optimal fracture parameters of the block is not constant which alters with the change of reservoir types and the results is more realistic. The achievement of this research is of great importance to the guidance of integral fracturing design.