摘要
L气田为南海获得的又一个自营深水中型以上天然气发现,进一步夯实了"南海万亿大气区"的储量基础。在储量计算过程中,由于该气田钻井较少,优质砂体分布位置处于海底坡折带转折端,水深变化异常剧烈,坡折带下方速度异常明显,并且目的层速度横向变化异常剧烈,构造落实难度大。针对上述问题,首先对工区已有的速度体进行优选,利用中值滤波对优选的速度体进行进一步优化去除速度噪音,进而利用井控及层控技术构建高精度速度模型,较好地解决了海底坡折带及目的层强非均质性对速度的影响,为储量合理计算提供有力支持。
L gas field is another self-operated above-medium-scale deepwater gas field in the South China sea.Its discovery has made it more promising to build"the trillion South China sea gas zone".Reserves calculation in the process,because the gas drilling is less,quality sand located in the end of seabed slope,with severe water depth changes and significant velocity change below slop have all made it challenging to confirm the structure.In response to these questions,firstly select the best velocity volume in gas fields.Secondly use median filter to remove the velocity noise.Thirdly,use well control and horizon control to construct the high precision velocity model.Solved the submarine slope break belt and strong purpose layer heterogeneity influence on speed and provided a strong support for further gas volume evaluation.
作者
张亮
刘巍
秦明
邓海东
ZHANG Liang;LIU Wei;QIN Ming;DENG Haidong(Zhanjiang Branch of CNOOC Ltd.,Zhanjiang 524057,China)
出处
《物探化探计算技术》
CAS
CSCD
2018年第5期601-606,共6页
Computing Techniques For Geophysical and Geochemical Exploration
基金
国家"十三五"重大专项(2016ZX05024-005)
关键词
海底坡折带
速度模型
储层预测
储量评价
seabed slope
velocity model
reservoir prediction
reserve evaluation
作者简介
第一作者:张亮(1986-),男,硕士,工程师,主要从事油气田勘探、开发地球物理研究工作,E-mail:zhangliang7@cnooc.com.cn。
