白55块储层预测研究方法及应用效果

The reservoir prediction method and application in block Bai 55 in Dongpu depression

(1.中国石化中原油田分公司勘探开发科学研究院，河南濮阳 457001；2.中国地质大学，北京 100083)

(1.Exploration and development science research institute , ZPEB, SINOPEC, Puyang 457001, China;2.China University of Geosciences, Beijing 100083, China)

从白55块砂泥岩薄互层的地层特点出发，研究了该区储层地球物理特征，分析了砂、泥岩的地震属性差异，如速度、波阻抗差异等，确定以砂组为单位进行储层预测。为了减少误差和多解性，对所使用的测井、地震资料进行了预处理。基于地震波阻抗反演理论，提出了相对波阻抗反演思路；采用最小二乘法子波反演GLI技术进行了层位标定；在精细构造解释的基础上，使用分形和波形相似内插方法构建复杂储层的地质模型；采用信息融合技术把地质、测井、地震等信息统一到同一模型中；采用全局寻优的快速反演算法进行了波阻抗反演；然后进行了相对波阻抗反演，并提取了相对波阻抗属性。最后对沙三中2砂组和3砂组储层分布进行了预测，并进行了有利储层检测。储层预测结果较好地反映了储层沉积规律。

This paper described reservoir prediction research methods from stratum character thin sand-shale alternating beds in Bai 55 block . We researched geophysical character of this area , analysed sand-shale seismic attribute difference, such as velocity 、impedance difference and carried through reservoir prediction according to sand group. Log and seismic data was preprocessed for reducing errors and multi-solution. We put forward novel impedance inversion way with seismic impedance inversion thoery , finished marking of horizon with wavelet inversion GLI technique of least square method , set up complex reservoir geological model with fractal and waveform similarity interpolation method on basis of fine construction interpretation and unified this model with multivariate geological information of geology 、log and seismic by information introjection technique , then finished impedance inversion with global optimization rapid inversion arithmetic and relative impedance inversion . to pick up relative impedance attribute , predict reservoir distribution of 2 and 3 sand groups in middle of S3 , then we worked in available reservoir prediction. The conclusion reflect reservoir sediment rule well .