准噶尔盆地玛湖1井区高密度三维OVT域裂缝预测的应用  

Fracture prediction with the high-density 3D OVT domain in the Well Mahu 1 area,Junggar Basin

作　　者：林娟[1] 娄兵[1] 张淑萍[1] 潘龙[1] 贺陆明[1] 郑鸿明[1] 

机构地区：[1]中国石油新疆油田分公司勘探开发研究院地球物理研究所,新疆乌鲁木齐830013

出　　处：《石油地球物理勘探》2017年第A02期146-152,共7页Oil Geophysical Prospecting

摘　　要：近年来准噶尔盆地陆续开展了多个区块高密度宽方位地震勘探。数据量的提升极大丰富了波场信息,宽方位观测方式为叠前各向异性研究及裂缝预测、叠前反演提供了更为理想的基础资料。针对高密度宽方位配套技术的OVT域处理,其数据子集具有较好一致性,在噪声压制、叠前偏移等处理中取得了较好的效果,特别是OVT域道集具有丰富的炮检距和重要的方位角信息、叠前资料包含丰富的地质信息,为储层预测、裂缝识别提供了一条有效的途径。以玛湖1井区三维资料为例,进行了OVT域裂缝预测的前期处理。裂缝预测及叠前反演等结果表明,OVT域道集可提高裂缝预测精度和预测结果的可靠性。In recent years,a few of wide-azimuth and high-density seismic surveys have been carried out in Junggar Basin.This big amont seismic data enriches greatly wavefield information.The wide-azimuth and high-density seismic data acquisition provides a more ideal datasets for prestack anisotropy,prestack inversion,and fracture prediction.The offset vector tile(OVT)domain processing for wideazimuth and high density datasets achieves good noise suppression and prestack migration because this kind of datasets has better consistency.A novel effective way for reservoir prediction and fracture identification is provided as OVT gathers have rich and important offset azimuth information and prestack data contains abundant geological information.Taking the Mahu1 high-density 3D survey as an example,this paper introduces data processing for OVT,anisotropy correction,prestack inversion,and fracture prediction with the OVT domain gathers.Our application results show that the OVT domain gathers can improve both the reliability and the accuracy of fracture prediction.

关 键 词：高密度宽方位 OVT技术 各向异性校正 叠前裂缝检测 

分 类 号：P631[天文地球—地质矿产勘探]