摘要
在富煤地区煤下储层预测难度大,尤其是在煤层呈现薄互层特征的情况下,薄煤互层会影响下部储层的真实地震反射特征,或者与下部储层一起形成复杂地震反射特征,增加储层预测难度。只有真实反映出煤下储层的展布特征,提高薄煤互层下储层预测精度,才能为后续开发井有效部署提供强有力的支撑。该文根据相控迭代地质统计学反演的思路进行了研究探索,建立了煤相约束叠前地质统计学反演流程,并在东海盆地某研究区进行应用,取得良好效果,储层预测精度高于常规反演方法。该技术思路和流程也适用于类似地质条件及其他特殊岩性发育区的储层预测。
It is very difficult to predict the reservoir under the coal.Due to the limit of seismic resolution,thin inter-bedded coal can affect the real seismic reflection characteristics of lower reservoir or generate complex seismic responses intermixed with the lower reservoir,which increase the difficulty of reservoir prediction.Only by truly reflecting the distribution characteristics of the sub-coal reservoir and improving the prediction accuracy of the reservoir under the thin coal interbed,we can provide strong support for the effective deployment of subsequent development wells.In this paper,based on the study of geo-statistics inversion,the coal facies constrained pre-stack geo-statistical inversion process has been established and applied in some area of the East China Sea basin.Good application results achieve and the reservoir prediction accuracy is higher than the conventional inversion method.This technique is also suitable for reservoir prediction under similar geological conditions and other special lithologic areas.
作者
刘江
李炳颖
包全
刘晓晖
陈易周
LIU Jiang;LI Bingying;BAO Quan;LIU Xiaohui;CHEN Yizhou(Shanghai Branch of CNOOC Ltd.,Shanghai 200335,China)
出处
《海洋石油》
CAS
2020年第2期1-8,共8页
Offshore Oil
关键词
薄煤互层
叠前地质统计学反演
煤相约束
储层精细预测
thin inter-bedded coal
pre-stack geo-statistics inversion
coal facies constraints
accurate reservoir prediction
