多井约束三维地震伽玛波阻抗反演在新场气田砂体描述中的运用

The Application on the Reverse Demonstration of Multi-well Restrictions-Three Dimentional Seismic Gamma-Wave Impedance to the Description of Xinchang Oil-Gas Field

多井约束三维地震反演是岩性勘探常采用的处理手段 ,三维地震数据体在井的约束下 ,通过反演可获取具有岩层物属性特征 (如岩性、孔隙度、伽玛值 )含意和油气意义的数据体 ,在此基础上建立地质解释模型 ,可以较准确的获取岩层相应参数体空间展布。运用Jason反演技术 ,生成伽玛岩性数据体和波阻抗数据体 ,清理出了新场气田沙溪庙组厚度≥ 5m ,展布面积≥ 0 3km2的 13层次砂体 ,并从沉积微相 。

The reverse demonstration of multi-well restrictions-three dimensional seismic gamma-wave impedance is a familiar way in lithology prospecting, and the data body of three dimensional seismic restricted by multi-well may educe the data body bearing the stratum physical attribute (i.e. lithology, porosity and gamma values) and the oil-gas significance. Geological Interpretative models established on the basis of the data body that can accurately afford the spacial distribution of relevant parameter in the strata. The data bodies of the gamma lithology and the wave impedance are acquired by applying the technique of Jason reverse demonstration, and 13 layers of sub-sandstone bodies with the thickness≥5m and distributed area≥0.3 are sorted out in the Shaqimiao formation of Xinchang oil-gas field, and the studies on gas-bearing capacity in the aspects of the sedimentary microfacies and wave impedance grades of stratum physical attribute are conducted.