基于叠加速度谱建立速度模型方法在X开发区的应用  

Application of velocity model based on superimposed velocity spectrum in X development zone

作　　者：孙丹[1] SUN Dan(No.4 Oil Production Company of Daqing Oilfield Company Ltd.,Heilongjiang Daqing 163511,China)

机构地区：[1]大庆油田有限责任公司第四采油厂,黑龙江大庆163511

出　　处：《非常规油气》2023年第5期30-37,47,共9页Unconventional Oil & Gas

基　　金：国家科技重大专项“大型油气田及煤层气开发——杏六区东部水驱控水提效示范区”(2016ZX05054-002)。

摘　　要：为了直观、真实描述X开发区构造特征,形成高质量深度域地震资料,针对X开发区现有速度建模方法在断层边部转换精度不高和井间速度场异常等问题,开展了海量数据整理,基于叠加速度谱空间速度属性建模等方面研究,充分发挥密井网的优势,利用声波时差测井资料获得单井速度,与叠加速度谱融合,构建高精度速度模型。结果表明:X开发区构造复杂,断层交错,且井资料仅在萨葡高油层为密井网资料,因此将地震资料纵向上分为3段进行速度属性优化融合,实现地震体时深转换后相对误差不超过0.2%;井断点均在深度域地震剖面的明显断裂痕迹上,且与深度域断层解释结果吻合。结合以上成果认识,对提高X开发区井震结合研究的精度及应用效率具有一定的指导意义。In order to intuitively and realistically describe the structural characteristics of the X development zone and form high-quality depth-domain seismic data,in view of the problems of low conversion accuracy at the fault edge and abnormal velocity field between wells in the existing velocity modeling methods developed in the X development zone,a large amount of data has been carried out.Data sorting,research based on spatial velocity attribute modeling of superimposed velocity spectrum,et al:give full play to the advantages of tight well network,use acoustic time difference logging resources to obtain single well velocity,and integrate with superimposed velocity spectrum to construct a high-precision velocity model.The results show that the structure of the X development zone is complex,the faults are staggered,and the well data is only dense well pattern data in the Sapugao oil layer.Therefore,the seismic data is divided into three longitudinal sections for optimization and fusion of velocity attributes,so as to realize the relative error after the time-depth conversion of the seismic body.The error is within 0.2%;The well breakpoints are all on the obvious fracture traces of the seismic section in the depth domain,and are consistent with the fault interpretation results in the depth domain.Combined with the above results,it has a certain effect on improving the accuracy and application efficiency of the well-seismic combination research in the X development zone.

关 键 词：时深转换 平均速度 叠加速度 速度模型 

分 类 号：TE122[石油与天然气工程—油气勘探]