克拉2气田稀井网储层精细三维地质建模
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摘要
塔里木盆地克拉2气田在开发方案设计阶段仅有5口探井和评价井,井距3～6km,难以满足建立常规储层精细三维地质模型的要求。为此,在充分研究该气田地面露头地质特征的基础上,纵向上利用测井的分辨率,横向上利用地震的分辨率,使用随机模拟方法,对该气田储层物性空间分布的非均质性进行了细致描述,对储层参数的空间分布进行估计或模拟;在远离井点控制的地方,采用地震导向方法找出井和地震数据间的关系;进而结合储层建模方法优选,建立了符合该气田气藏地质特征的三维地质模型,模型的符合程度超过90%。为该气田开发方案的制定及优化奠定了基础,形成了稀井网条件下储层精细建模特色技术。
Only 5 exploratory and appraisal wells have been drilled in the Kela-2 gas field in the Tarim basin and they can not meet the requirements of conventional fine 3D geologic modeling of reservoirs due to their wide spacing of 3-6 km.Based on detailed observation of the reservoir outcrops in the gas field,the high vertical resolution of log data and the high lateral resolution of seismic data are integrated to perform fine description of the heterogeneity of spatial distribution of reservoir physical properties through probabilistic simulation.The spatial distributions of reservoir parameters are estimated or simulated.In areas far away from well control,seismic guidance can significantly enhance accuracy and resolution,and reveal the relationship between well and seismic data.The optimal reservoir modeling methods are selected to build up 3D geologic models suitable for the geologic features of this gas field.The coincidence rate of the models is over 90%.They provide a robust basis for development planning and optimization.
Only 5 exploratory and appraisal wells have been drilled in the Kela-2 gas field in the Tarim basin and they can not meet the requirements of conventional fine 3D geologic modeling of reservoirs due to their wide spacing of 3-6 km.Based on detailed observation of the reservoir outcrops in the gas field,the high vertical resolution of log data and the high lateral resolution of seismic data are integrated to perform fine description of the heterogeneity of spatial distribution of reservoir physical properties through probabilistic simulation.The spatial distributions of reservoir parameters are estimated or simulated.In areas far away from well control,seismic guidance can significantly enhance accuracy and resolution,and reveal the relationship between well and seismic data.The optimal reservoir modeling methods are selected to build up 3D geologic models suitable for the geologic features of this gas field.The coincidence rate of the models is over 90%.They provide a robust basis for development planning and optimization.
引文
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