应用水平井的储层地质建模方法研究

发布时间：2018-05-24 19:41

本文选题：水平井区 + 地质知识库　；参考：《西安石油大学》2015年硕士论文

【摘要】：奥里诺科重油带M区Morichal段储层为砂质辫状河沉积,以水平井为主要开发方式。水平井测井资料具有横向的地质信息,与直井测井资料相比,其可以描述储层岩性及物性参数在平面上的变化特征。水平井测井资料在空间上的分布及同一地层内的数据量与直井有较大差别,基于此,论文对如何应用水平井测井资料进行地质建模展开研究。首先,利用测井资料、地震资料、现代露头沉积测量描述研究区辫状河沉积相分布特征。在沉积相分布特征的基础上,应用基于目标的模拟方法建立具有数字化特征的辫状河沉积模式。其次,基于井震结合的建模思想,论文采用多点地质统计学的建模方法,通过三维地震波阻抗数据体约束沉积相模型。基于相控建模的思想,论文采用序贯高斯的建模方法,通过沉积相模型约束储层物性参数模型。最后,通过多种模型验证方法检验模型的合理性及精度。由于水平井数据具有地层横向确定的地质信息,在描述地层横向地质特征方面较直井数据有很大优势。但是,由于水平井钻井过程中应用地质导向技术规避泥岩,水平井数据会导致地质建模结果失真。针对应用水平井数据进行地质建模的两个困难点,论文提出了相应的解决办法。在沉积相建模的过程中,应用地震数据体约束沉积相趋势,保证沉积相在平面上和纵向上的分布趋势正确。在属性建模的过程中,利用只用直井数据变差函数分析的结果约束属性参数分布趋势,保证属性参数的分布趋势和连续性与物源方向一致。通过多种模型验证方法检验模型的结果表明,论文所建立的水平井开发区的沉积相模型和渗透率模型不确定性小,模型精度较高。因此论文提出的针对应用水平井数据进行地质建模的方法可靠性高,对同类型水平井开发区的地质建模工作具有重要借鉴意义。
[Abstract]:The reservoir of Morichal member in M area of Orinoco heavy oil belt is sandy braided river deposit, and horizontal well is the main development mode. The horizontal well logging data have horizontal geological information, which can describe the variation characteristics of reservoir lithology and physical parameters in the plane compared with the straight well logging data. The spatial distribution of horizontal well logging data and the amount of data in the same formation are quite different from that in the vertical well. Based on this, this paper studies how to use the horizontal well logging data for geological modeling. Firstly, the distribution characteristics of braided river sedimentary facies in the study area are described by logging data and seismic data. Based on the characteristics of sedimentary facies distribution, a model of braided river deposition with digital characteristics is established by means of object-based simulation. Secondly, based on the idea of combining well and earthquake, this paper adopts the modeling method of multi-point geostatistics, and uses three-dimensional seismic wave impedance data to constrain sedimentary facies model. Based on the idea of facies control modeling, this paper adopts sequential Gao Si modeling method and constrains reservoir physical parameters model by sedimentary facies model. Finally, the rationality and accuracy of the model are verified by various models. Because horizontal well data have geological information of horizontal determination of formation, it has a great advantage over straight well data in describing horizontal geological characteristics of formation. However, due to the application of geological guidance technology to avoid mudstone during horizontal well drilling, the horizontal well data will lead to the distortion of geological modeling results. Aiming at the two difficult points of applying horizontal well data to geological modeling, the corresponding solutions are put forward in this paper. In the process of sedimentary facies modeling, seismic data bodies are used to constrain the sedimentary facies trend to ensure the correct distribution trend of sedimentary facies on the plane and longitudinally. In the process of attribute modeling, the distribution trend of attribute parameters is restricted by using the result of variation function analysis of vertical well data to ensure that the distribution trend and continuity of attribute parameters are consistent with the direction of source. The results show that the sedimentary facies model and permeability model of horizontal well development zone established in this paper have less uncertainty and higher precision. Therefore, the method of geological modeling based on horizontal well data proposed in this paper has high reliability, and has important reference significance for geological modeling work of the same type horizontal well development zone.
【学位授予单位】：西安石油大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TE243;P628.3

【参考文献】