地震反演数据体约束的储层地质建模方法研究

Research on reservoir geological modeling method constrained by seismic inversion data volume

SN东部过渡带区块井资料少、井距大,难以对储层进行精细的描述,不利于过渡带外扩寻找有利区。地震资料具有横向分辨率高、横向信息丰富的特点能够约束储层平面的非均质性和不确定性。综合测井数据纵向高分辨率和地震数据横向高分辨率的优势,以测井数据为硬数据,地震反演数据体作为软数据协同约束建立沉积相模型。结果表明采用地质统计学反演和建模相结合进行储层三维表征,在无井区砂体空间展布形态、接触关系、边界位置更加精准,更加忠实于原始地质特征,对于井位稀少的区域效果尤其明显,实现了油气储层的精细建模,降低了储层建模中的不确定性,为目标区潜力井位优选提供了依据。

There are few well data and large well spacing in the eastern transition zone of Sanan,so it is difficult to describe the reservoir in detail,which is not conducive to the expansion of the transition zone and the search for favorable areas.Seismic data with high lateral resolution and rich lateral information can restrain the heterogeneity and uncertainty of reservoir plane.Combining the advantages of high vertical resolution of integrated logging data and high horizontal resolution of seismic data,the sedimentary facies model is established with the logging data as hard data and seismic inversion data as soft data.Results show that the combination of geostatistical inversion and modeling for 3D reservoir characterization,and in the absence of wellblock sand body space form,contact relation,boundary location are more accurate,more faithful to the original geological characteristics,the effect is particularly obvious for well populated area,realize the fine oil and gas reservoir modeling,reduce the uncertainty of reservoir modeling,It provides a basis for optimizing potential well location in the target area.