广角地震勘探在鄂尔多斯盆地超深层中的应用  

Application of wide-angle seismic exploration in ultra-deep layers of the Ordos Basin

作　　者：王泓然 程晨 朱同 张永佳 WANG Hong-ran;CHENG Chen;ZHU Tong;ZHANG Yong-jia(Department of Earth Science and Engineering,Xi'anShiyouUniversity,Xi'an 710065,China)

机构地区：[1]西安石油大学地球科学与工程学院,陕西西安710300

出　　处：《地下水》2023年第1期162-164,共3页Ground water

摘　　要：随着油气资源勘探力度的不断加大,地震勘探也逐渐由浅、中层向深层、超深层转变。面对地质条件复杂的探区,常规的地震勘探无法获取超深储层的有效反射信息,难以获取信噪比高、成像效果好的地震资料,地震剖面无法清晰刻画出工区的地质构造。论文根据野外采集要求,结合地质任务,选择采用广角地震反射观测系统,进行超深储层地震资料的采集工作。结果表明:采用广角地震勘探方法可以获得较强能量的远偏移距处弱反射地震信号,有效的解决超深层弱反射的问题,提高地震资料的信噪比。对野外采集资料效果分析发现,相对于常规地震叠加剖面,广角反射地震叠加剖面品质得到明显改善,同相轴连续,构造部位清晰可见,地震成像效果良好。理论和实践都证明,广角地震勘探对超深层油气勘探具有重要的应用效果。With the continuous increase of oil and gas resource exploration,seismic exploration has gradually changed from shallow and middle layers to deep and ultra-deep.In the face of complex geological conditions,conventional seismic exploration cannot obtain effective reflection information of ultra-deep reservoirs,it is difficult to obtain seismic data with high signal-to-noise ratio and good imaging effect,and the seismic profile cannot clearly depict the geological structure of the work area.According to the field collection requirements and combined with the geological task,the paper selects the wide-angle seismic reflection observation system to collect seismic data of ultra-deep reservoirs.The results show that the wide-angle seismic exploration method can obtain the weak reflection seismic signal at the long offset distance with strong energy,effectively solve the problem of ultra-deep weak reflection,and improve the signal-to-noise ratio of seismic data.The analysis of the effect of field data collection found that compared with the conventional seismic superposition profile,the quality of the wide-angle reflection seismic superposition profile was significantly improved,the in-phase axis was continuous,the structural parts were clearly visible,and the seismic imaging effect was good.Both theory and practice have proved that wide-angle seismic exploration has an important application effect on ultra-deep oil and gas exploration.

关 键 词：广角地震 地震采集技术 超深储层 观测系统设计 

分 类 号：P631.425[天文地球—地质矿产勘探]