基于储层构造和沉积等时格架的储层静态建模实例研究

Reservoir characterization based on structural and depositional isochronous framework:a case study

储层静态建模不仅是油藏工程师认识储层和提高采收率的关键环节,也是地球物理工程师努力追求的目标。由于地质成因的复杂性和不同地球物理数据间的差异性,储层静态建模在实际应用中面临较大的挑战,其中最主要的难题是如何联合应用地震空间分辨率和测井垂向分辨率进行储层静态建模。为此,本文提出基于储层构造和沉积等时格架的储层静态建模方法,其要点有:基于地震和测井分辨率相同部分的储层构造等时格架解释、基于层序地层学的地震和测井储层沉积等时格架解释,以及基于储层构造和沉积等时格架的测井插值建模和基于建模结果的等时切片单砂体解释等。该方法在中国西部准噶尔盆地西北缘的逆掩断层下盘薄互储层研究中进行了应用,得到了开发信息的验证,从而解决了该油田面临的开发非均质高含水问题。

Reservoir static modeling(RSM)is one of the key points for reservoir engineers to further understand beds and enhance reservoir recovery,which is also the pursuing goal of geophysicists.However great challenges often occur in RSM practical applications due to complexity of geological genesis and diversity of geophysical data.And one of the most critical problems is the integration of the spatial resolution of seismic data and the vertical resolution of well logging data in reservoir model build-ing.Here a new RSM method based on the structural and isochronous stratigraphic frameworks is proposed.The following key techniques are involved:isochronous structural framework interpretation based on the same resolution of seismic and well logging data,isochronous framework interpretation based on seismic sequence stratigraphy and well logging reservoir deposition,reservoir static interpolating modeling with the constraints of structural and depositional isochronous stratigraphic frameworks,and single sand-body interpretation based on modeling result.The proposed approach has been successfully applied to thin inter-bed reservoirs located at the lower wall of overthrusting faults in Junggar Basin,Western China,and its validity has been proved by the oil and gas development in the field.