【摘要】 地质统计学反演是一种基于波阻抗反演提高纵向分辨率的反演方法。它将随机模拟与地震反演相结合,以地震数据为约束,通过模拟储层的空间分布特征来预测储层分布规律,是量化预测的有效工具。以什邡气田A区块为例,利用地震、测井资料和地质理论,在稀疏脉冲波阻抗反演的基础上进行地质统计学反演,得到一套高分辨率的岩性反演体。对比得知,预测结果与钻井吻合较好,预测精度得到明显提高。这为后续天然气储量计算、开发井产能建设奠定了基础。更多还原

【Abstract】 Geostatistical inversion,an inversion method,has improved vertical resolution on the basis of wave impedance.It combines stochastic simulation with seismic inversion,constrained by seismic data,and then predicts the distribution law of reservoir by simulating reservoir’s spatial distribution characteristics.The method is an effective tool for quantitative prediction.Taking a block of Shifang gas field as an example,to perform geostatistical inversion based on sparse spike inversion of wave impedance and get a set of high-resolution lithological inversion body from the integrating seismic data and well data with geological data.According to comparison of the application for field data,it demonstrates that the prediction results coincide well with drilling,and prediction accuracy is improved obviously.In addition,the results of inversion provide a basis for subsequent calculation of gas reserves and production capacity building of development well.更多还原