储层参数优化识别技术及其在松南地区的应用

Optimal discrimination of reservoir parameters and its application in the south part of Songliao Basin

中国石化石油勘探开发研究院南京石油物探研究所 江苏南京2100014

Institute of Geophysical Prospecting, SINOPEC Research Institute of Petroleum Exploration and Development, Nanjing 210014, China

地震参数判别是储层预测的重要手段之一,但地震属性参数本身也和原始地震数据一样会受各种因素的干扰而影响最终判别效果。储层判别往往要用到众多的属性参数,因此优化储层参数对于进一步提高判别精度很有必要。储层参数优化识别技术的基本思路是首先要对提取的地震参数进行相关,然后根据其特征向量消除或削弱某些地震属性参数的影响,达到优化储层参数的目的。具体做法是,用地震属性形成特征向量,再将各属性参数值投影到第一主分量,接近第一主分量的属性参数将得以保留,而有偏差的将得到程度不同的削弱。将该方法应用于松南地区的储层预测,取得了较好的效果。

Discrimination of seismic attributes is an important way to reservoir prediction. However, the seismic attributes like original seismic data suffer frommany factors, which impairs discriminating effect. In generalmany attributes shall be used in the identification of reservoirs. The optimization of seismic attributes will lead to improvement of discrimination precision. An optimizationmethod for seismic attributes and its application in the south part of Songliao Basin are presented. The extracted seismic attributes are correlated to determine the contributions of different attributes in the discrimination. This can be done as follows. First a feature vector is formed with the seismic attributes. Then the feature vector is projected to the first principal component. Finally the attributes that are close to the principal component are retained, and others are discarded.