中国西部D区块二维地震资料处理方法  

2Dseismic data processing methods in the Block D, West China

作　　者：张高成[1] 周刚[2] 司卫[1] 张娟[1] 杨丹[1] 

机构地区：[1]中国石化河南油田分公司石油物探技术研究院,河南郑州450018 [2]中国石化西北油田分公司勘探开发研究院,新疆乌鲁木齐830011

出　　处：《石油地球物理勘探》2013年第A01期31-35,202+5,共5页Oil Geophysical Prospecting

摘　　要：为提高中国西部D区块地震资料的成像精度,本文首先采用了层析静校正技术,信号多次重构(LIFT)法去除面波,多域联合法去除线性干扰,高精度拉东变换去除多次波;然后采用常相位旋转统一相位,地表一致性处理技术解决井震资料及由地表原因引起的子波非一致性问题;最后通过建立精确速度模型,采用克希霍夫叠前时间偏移提高了该区复杂构造偏移成像精度。处理结果表明,最终成果剖面信噪比得到大幅提高,成像准确,波组特征清楚,地层接触关系明确,各种构造形态清楚。This paper discusses some seismic data processing methods in the Block D of West China.In order to improve seismic data imaging,first we use to mographic static correction,apply multi signal reconstruction to eliminate the surface waves and multi-domain combination to remove linear noise,and adopt high-precision Radon transform to remove multiples.Then,using constant phase rotation and surface-consistent approach,we perform wavelet shaping due to different seismic source such as dynamite and vibroseis.For enhancing the precision of migrated imaging,we build accurate velocity model,and use Kirchhoff prestack time migration.On final seismic sections,the signalto-noise ratio is greatly improved,the imaging is accurate,and both wave group characteristics and various structural shapes are clear.

关 键 词：层析静校正 叠前去噪 子波一致性处理 叠前时间偏移 

分 类 号：P631[天文地球—地质矿产勘探]