提高S油田目的层成像质量的措施  

Measures to Improve the Imaging Quality of Target Layers in S Oilfield

作　　者：刘励云 鲍祥生 任宪涛 LIU Liyun;BAO Xiangsheng;REN Xiantao(China National Offshore Oil International Co.,Ltd.,Beijing 100028,China;.2.School of Petroleum Engineering,Guangdong University of Petrochemical Technology,Maoming 525000,China)

机构地区：[1]中国海洋石油国际有限公司,北京100028 [2]广东石油化工学院石油工程学院,广东茂名525000

出　　处：《广东石油化工学院学报》2025年第1期30-34,共5页Journal of Guangdong University of Petrochemical Technology

基　　金：中国海洋石油有限公司“十四五”重大科技项目(KJGG2022-0903,KJGG2022-0904)。

摘　　要：S油田前期采集的三维资料经过多次重处理,但处理后的地震资料有利油气存在区域存在大片模糊带,且断层成像不清晰,严重影响油田后续勘探开发方案的合理部署。前期通过研究已认识到模糊带、断层成像不清晰可能与观测系统采集参数设计不合理、局部低速带认识不足有较大的关系,但它们究竟对成像有怎样影响,目前认识比较模糊,难以对后续观测系统采集参数设计和处理给予实质性指导。为提高对后续S油田采集和处理的指导性,结合解释的井震数据、地质资料和专家经验构建二维地质模型,以正演模拟为手段,开展面元尺寸等不同采集参数和不同低速带速度的成像质量分析。研究指出,为获得高质量的地震资料,在获得可靠低速带速度基础上,建议S油田气枪的震源容量采用与2495 cuin接近比较合适,面元尺寸采用12.5 m、炮点距采用100 m、最大偏移距采用5 km以上为宜。The 3D data collected in the early stage of S oilfield have been reprocessed many times,but the seismic data after processing have large fuzzy zones in the favorable oil and gas areas,and the tomography imaging is not clear,which seriously affects the reasonable deployment of the follow-up exploration and development plan of the oilfield.Through previous studies,it has been recognized that fuzzy zone and unclear tomography may be related to insufficient understanding of unreasonable design of observation system acquisition parameters and local low speed zone insufficient understanding.However,how they affect imaging is fuzzy,and it is difficult to give substantive guidance to the design and processing of subsequent observation system acquisition parameters.To improve the guidance of subsequent S oilfield acquisition and processing,a two-dimensional geological model is constructed by combining interpretation seismic data,geological data,and expert experience,to analyze the imaging quality of different acquisition parameters,such as bin size,and different speed of low-speed zone.It is suggested to use the source capacity of gas gun close to 2,495 cuin,bin size using 12.5 m,shot point distance using 100 m and the maximum offset distance above 5 km to obtain high quality seismic data based on obtaining reliable low-speed belt speed.

关 键 词：断层成像 模糊带 低速带 采集参数 最大偏移距 

分 类 号：TE37[石油与天然气工程—油气田开发工程]