地震驱动的油藏模型建立及分析

发布时间：2018-04-14 18:34

本文选题：地震驱动建模方法 + 岩石物理分析　；参考：《中国石油大学(华东)》2015年硕士论文

【摘要】：目前油气田的勘探开发程度越来越高,如何综合利用地质、地震、测井等多学科多尺度数据资料建立起更高分辨率的三维储层模型,从而实现对储层分布规律及其非均质的精细描述,进而指导新油气田的勘探开发及老油区剩余油的稳产和增产,具有十分重要的意义。地震驱动建模方法作为的一种新近提出的井震联合建模方法,其在建模过程中将井数据作为硬数据的同时提出地震数据同样是硬数据,充分整合利用地震数据,回避地质统计学中对井信息依赖程度高的变差函数的求取,利用地震数据的空间相关性求取加权系数,从而大大降低了井网稀疏、井距大以及储层非均质性较强条件下井间物性估计的不确定性。经过近几年的不断研究发展,地震驱动建模已经能够综合先验的地质认识,沉积模式,建立起纵向上与井分辨率一致横向上与地震数据变化一致的高精度三维油藏地质模型,但目前还不能直接应用到油藏数值模拟,需要进一步将其转化为油藏模型。本文基于地震驱动建模建立的地质模型,针对地质模型转化为油藏模型的常规流程,引入地震油藏闭合循环的思想。通过建立岩石物理模型,在常规的时深转换和模型粗化转换过程中尝试引入地球物理信息。以实际地质模型为基础,分析时深转换和模型粗化过程中的合成地震响应变化及其与观测地震响应的差异,进而分析评价、约束更新转化过程,形成一套地质模型转化到油藏模型的地震油藏闭合循环新流程,从而使转化后油藏模型依然保持原始地震的整体响应,为后期油藏数值模拟打下了坚实的基础。
[Abstract]:At present, the degree of exploration and development of oil and gas fields is getting higher and higher. How to make comprehensive use of multi-disciplinary and multi-scale data such as geology, seismology, logging and so on to establish a higher resolution 3D reservoir model,It is of great significance to realize the fine description of reservoir distribution law and its heterogeneity, and to guide the exploration and development of new oil and gas fields and the stable production and production increase of remaining oil in the old oil area.Seismic driving modeling method is a newly proposed joint modeling method for well and earthquake. In the process of modeling, well data are regarded as hard data and seismic data are also hard data, so seismic data is fully integrated and utilized.Avoiding the calculation of variation function which is highly dependent on well information in geostatistics, the weighted coefficient is obtained by using the spatial correlation of seismic data, thus greatly reducing the well pattern sparsity.Uncertainty of cross-well physical property estimation under the condition of large spacing and strong reservoir heterogeneity.Through the continuous research and development in recent years, seismic driving modeling has been able to integrate a prior geological understanding, sedimentary model, and establish a three-dimensional reservoir geological model with high accuracy, which is consistent with the vertical and well resolution and the change of seismic data horizontally.But at present, it can not be directly applied to reservoir numerical simulation, which needs to be further converted into reservoir model.Based on the geological model established by seismic driving modeling, this paper introduces the idea of closed cycle of seismic reservoir according to the routine flow of transforming geological model into reservoir model.Through the establishment of rock physical models, geophysical information is introduced into the conventional time-depth conversion and model coarsening process.Based on the actual geological model, the variation of synthetic seismic response in the process of time-depth conversion and model coarsening is analyzed, and the difference between synthetic seismic response and observed seismic response is analyzed.A new process of closed circulation of seismic reservoir is formed which is transformed from geological model to reservoir model, so that the whole response of the original earthquake can be maintained by the transformed reservoir model, which lays a solid foundation for the later reservoir numerical simulation.
【学位授予单位】：中国石油大学(华东)
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P631.4;P618.13

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