小波变换在砂砾岩体期次划分中的应用——以胜利油田盐22块为例

盐家油田盐22块储层为典型砂砾岩储层,期次划分是储层研究难点.据小波变换基本原理、地质学意义及砂砾岩体储层特点,优选二进制dbn系列小波,对中子测井数据开展连续小波分析,利用岩心成像资料及不同尺度小波系数曲线,综合分析确定其小波变换尺度因子,最终开展砂砾岩储层期次划分.钻井及动态资料证实了期次划分的可靠性.

Application of Wavelet Transformation Method to the Depositional Stage Division of Glutenite Bodies:Taking Block Yan22 of Shengli Oilfield for Example

The reservoirs of Block Yan22 in Yanjia Oilfield are classic glutenite and it becomes the hard point for reservoir study to divide the depositional stage.Based on the fundamental principle and its geological meanings of wavelet transformation and the characteristics of glutenite researvoirs,the binary wavelet of dbn series are given preference to.Continuous wavelet analysis is carried out to neutron well logging data.Make use of core image data and wavelet parameter curves with different scale to accomplish comprehensive analysis and confirm the scale factor of wavelet transformation,and for the last step,to divide the depositional stage of glutenite bodies,and the well drilling and dynamic data indicate that the depositional stage division in this way is reliable.