一种基于OVT域的地震储层预测方法  

A Seismic Reservoir Prediction Based on OVT Domain

作　　者：李红星[1] Li Hongxing(Institute of Exploration and Development of PetroChina Daqing Oilfield Limited Company,Daqing,Heilongjiang 163712,China)

机构地区：[1]中国石油大庆油田有限责任公司

出　　处：《特种油气藏》2019年第4期52-57,共6页Special Oil & Gas Reservoirs

基　　金：国家科技重大专项“大型油气田及煤层气开发”(2016ZX05054)

摘　　要：针对全叠加地震数据局部储层预测精度低的问题,以地震沉积学为基础,由叠前地震资料入手,获取河道砂体的地震反射信息,采用分组优选最佳方位角和炮检距叠加窗口方法,对OVT道集进行部分叠加,进行储层预测工作,并将研究成果应用于大庆长垣油田北一二排西区块储层刻画中,结果表明:方位角和炮检距窗口成像方法能够得到叠前道集中所包含的随方位角、炮检距变化的储层信息,能够有效识别部分全叠加数据不能预测的河道砂体,河道形态更加清晰。最佳方位角和炮检距叠加数据与全叠加数据相比,地震储层预测精度有明显提高,对长垣油田新一轮次的储层精细刻画工作具有很好的指导意义。In order to improve the local reservoir prediction with fully stack seismic data,the pre-stack seismic data was used to obtain the seismic reflection information of channel sandbody based on seismic sedimentology.Grouping azimuth optimization and offset stack window were used to partially stack the OVT gathers and predict reservoirs.This study was applied to the western block reservoir characterization in the North1st and 2nd of Changyuan Oilfield in Daqing.Result indicates that the azimuth and offset stack window mapping method could gain the reservoir information in the pre-stack gathers that changes with azimuth and offset.The channel sandbodies that cannot be predicted by partial full-stack data can be effectively identified,which shows a more distinct channel shape.Comparing with the interpretation with full-stack data,the seismic reservoir prediction resolution has been increased by the stack data between optimal azimuth and offset.This research could provide certain guidance for the round of fine reservoir characterization in Changyuan Oilfield.

关 键 词：OVT域 方位角 炮检距 叠前道集 叠加窗口 长垣油田 

分 类 号：TE122.2[石油与天然气工程—油气勘探]