临兴地区致密砂岩储层地震正演模型响应研究  

Study on Response Characteristics of Seismic Forward Modeling of Tight Sandstone Reservoir in Linxing Area

作　　者：崔哲 邢文军 张昊 张军林 逄建东 石雪峰 郭飒飒 CUI Zhe;XING Wen-jun;ZHANG Hao;ZHANG Jun-lin;PANG Jian-dong;SHI Xue-feng;GUO Sa-sa(Engineering Technology Branch,CNOOC Energy Technology&Services Limited,Tianjin 300452,China)

机构地区：[1]中海油能源发展股份有限公司工程技术分公司,天津300452

出　　处：《科技和产业》2021年第12期70-76,共7页Science Technology and Industry

基　　金：中海油能源发展重大专项资助项目(E-J613D002)。

摘　　要：地震正演模拟在油气勘探的工作中十分重要,可以将复杂的地质问题进行简化分析。对临兴地区实际地层发育特征建立模型进行地震正演响应分析,并建立等效模型及流体替换模型进行对比分析。结果表明:①最终显示的地震波形是不同反射界面数据的叠加,在较高分辨率时,多套砂岩层的反射相互独立;较低分辨率时,多套砂岩层的反射波开始叠加,只能反映包络信息。②从等效砂岩模型看出,砂泥岩等效模型与原模型基本一致,导致通过地震数据解释砂泥岩存在较大的多解性。③高产气层的存在仅会导致波形的位置发生变化,从剖面上看只是深度发生变化,这在实际工作中也很难有效判断是否为气层。研究结果可以指导今后地震资料解释与反演结果解释,提高储层预测符合率及含油气储层的钻遇率。Seismic forward modeling has significant importance in oil and gas exploration,which can simplify the analysis of complex geological problems.The results show that:①The final seismic waveform is the superposition of different reflection interface data.When the resolution is higher,the reflection of multiple sets of sandstone is independent.When the resolution is lower,the reflection of multiple sets of sandstone is independent When the waves begin to stack,they can only reflect the envelope information.②From the equivalent sandstone model,it can be seen that the equivalent model of sandstone and mudstone is basically consistent with the original model,which leads to the existence of multiple solutions in the interpretation of sandstone and mudstone by seismic data.③The existence of high-yield gas reservoir will only change the position of the waveform,but only the depth from the profile,which is difficult to effectively judge whether it is a gas reservoir in practical work.It can guide the interpretation of seismic data and inversion results,improve the coincidence rate of reservoir prediction and the drilling rate of oil and gas bearing reservoirs.

关 键 词：鄂尔多斯盆地 临兴地区 正演模拟 等效模型 流体替换 

分 类 号：P631.4[天文地球—地质矿产勘探]