浅层河道砂体的地震准确识别与精细刻画  

ACCURATE SEISMIC IDENTIFICATION AND FINE CHARACTERIZATION OF SHALLOW CHANNEL SANDBODIES

作　　者：龙隆[1] 杨瑞召[1] 刘颖[1] 尚优优 张凯淞 赵争光[1] 

机构地区：[1]中国矿业大学地球科学与测绘工程学院

出　　处：《大庆石油地质与开发》2014年第3期146-150,共5页Petroleum Geology & Oilfield Development in Daqing

基　　金：国家重大基础研究计划(2009CB219300)

摘　　要：准确刻画河道的空间展布是浅层气勘探研究的前提.因此,将由河道沉积的地质背景、测井曲线特征确定的茂兴工区四方台组地震反射特征作为“种子点”,通过三维地震数据体上的河道形态自动追踪得出河道沉积的空间展布规律.再依据钻井解释的河道沉积厚度修正其空间形态,提高了河道形态的刻画精度.研究结果表明,该区发育5条河道沉积,连续的地层切片展示出不同沉积时期河道的形成、变迁以及消失过程,强振幅区域为气藏发育区.Accurate characterize the spatial distribution of the river channels is the prerequisite for shallow gas ex- ploration and research. So taking the seismic reflection characteristics of Formation Sifangtai in Maoxing site as ＂ seed point＂ , which are determined by the geological background and logs＂ characteristics of the channel deposits, the spatial distributions of the channel deposits are derived by means of the automatic tracking technology of the channel configurations in 3D seismic data. And moreover, according to the corrected spatial configurations of the channel sedimentary thickness by the drilling interpretation, the characterized precision of the forms is improved. The study results show that there are five channels developed and deposited in the region, the continuous strati- graphic slices demonstrate the process of the formation, change and the disappearance of the channels during different sedimentary periods. The strong amplitude areas reflects the blocks of well-developed gas reservoirs.

关 键 词：茂兴地区 三维地震 反射特征 河道砂体 种子点 三维可视化 沿层切片 

分 类 号：P631[天文地球—地质矿产勘探]