摘要
针对喇嘛甸油田河流-三角洲相的储层,基于井数据外推井间储层预测存在着很大不确定性的难题,在精细地震资料处理的基础上,输出高精度的三维地震数据体,并通过井震精细标定,建立井震时深关系,利用地震属性切片,融合多元回归关系,实现薄互储层定量精细描述。结果表明:地震处理后地震资料横向分辨率和纵向分辨率得到了显著提高,易于横向砂体边界的识别;研究区地震与井合成记录相关系数大于0.5的井,主要分布在背斜顶部比较平缓的地方;将最大振幅、均方根振幅、平均振幅及能量强度进行了多元逐步回归得到预测砂体厚度分布图,与测井解释砂岩厚度结果相比,该描述方法可有效提高井间砂体描述精度,打破了长期以来砂体大规模连片的现象,展现了该方法在该区良好的应用前景。
In view of the reservoir of fluvial delta facies in Lamadian oilfield, there was a problem of big uncertainty in the prediction of inter well reservoir based on well data extrapolation. Based on the fine seismic data processing, high-precision 3D seismic data sets were outputted, the time-depth relationship of vertical well earthquake was built through fine calibration of well earthquake, quantitative fine description of thin inter reservoir was realized using seismic attribute slice and integrating multiple regression relationship. The results showed that after seismic processing, the horizontal and vertical resolutions of seismic data were significantly improved, which was easy to identify the boundary of horizontal sand body. The wells whose correlation coefficient of seismic and well composite records in the study area was greater than 0.5 was mainly distributed in relatively gentle place on the top of anticline;the maximum amplitude, root mean square amplitude, average amplitude and energy intensity were obtained by multiple stepwise regression, and they were compared with the result of logging interpretation of sandstone thickness. This method can effectively improve the accuracy of inter well sand body description, break the phenomenon of large-scale sand body connection, and show a good application prospect in this area.
作者
董海波
DONG Hai-bo(Development Department of Yanchang Oilfield Co.,Ltd.,Xi’an 716000,China)
出处
《当代化工》
CAS
2021年第2期395-398,共4页
Contemporary Chemical Industry
基金
国家自然科学基金,基于多点统计学的天然裂缝系统随机模拟方法研究与并行实现(项目编号:41502311)。
关键词
定量描述
薄互层
多元回归
地震
测井曲线
Quantitative description
Thin interbed
Multiple regression
Seismic
Logging curve
