【摘要】 提出一种基于单点算法假设的三维上覆岩层压力计算方法,能够利用三维密度数据准确计算三维上覆岩层压力。首先,利用测井约束地震反演技术求取三维密度数据体;然后,以单点算法和空间插值为基础利用密度反演数据逐点计算上覆岩层压力梯度;最后,再次借助空间插值技术重构三维上覆岩层压力体。该算法将单井约束和地质分层信息相结合,有效提高三维上覆岩层压力场的计算精度。根据三维上覆岩层压力计算方法编制相应的计算机程序,以酒东盆地营尔凹陷的一地震勘探区域为例计算该区域的三维上覆岩层压力梯度,并与该区域上的已钻井的单井上覆岩层压力梯度进行对比分析。对比结果证明该方法计算精度较高,可以满足工程需要。更多还原

【Abstract】 This paper presents a new model for 3D overburden pressure estimation,which is based on single point algorithm hypothesis.In this model,the 3D seismic data is combined with drilled well information and geological stratification information,greatly improves the calculation precision of 3D overburden pressure field.This model consists of three steps:first,3D density volume is obtained by logging constrained seismic inversion;second,overburden pressure data is calculated from inversion density data point by point,on basis of single algorithm and spatial interpolation;finally,3D overburden pressure volume is rebuilt by spatial interpolation calculation.A computer program is developed,and a seismic zone of the Yinger depression in Jiudong basin is taken as a calculation example.Compared with the overburden pressure of drilled wells in this zone,the results proved the accuracy and applicability of this model.更多还原