摘要
针对高石梯地区(灯影组四段)灯四段储层地震响应特征不明及前期识别的“宽波谷+‘亮点’”地震模式适用性问题,在研究区背景地层地震反射特征分析的基础上,研究了储层地震响应差异的影响因素并建立了相应的正演模型,然后结合实际资料总结了灯四段储层的地震识别模式,最后分析了平面地震振幅属性所表征的储层特征。结果表明,储层性质的相似性是储层地震响应多解性的重要来源;储层组合特征是储层地震响应差异性的成因依据;灯四段顶部储层地震响应主要为震顶波峰减弱或下拉,灯四2储层可通过上亚段中部“亮点”与底部波峰特征进行识别,灯四1储层主要识别依据为单独珠状反射;通过实际地震响应特征建立起了高石梯地区灯四段储层的5种地震成因识别模式,高石1井区中均方根振幅属性与储层厚度具有一定的对应关系,准确提取该属性能够为研究区储层的有效预测提供参考依据。
In view of the uncertain seismic response characteristics of the fourth member of Sinian Dengying Formation(Z_(2)dn_(4))in Gaoshiti area and the low applicability of the“wide trough+bright spots”seismic model identified in the early stage,a series of studies based on the analysis of seismic reflection characteristics of background strata in the study area were carried out.Firstly,the influencing factors of the difference in reservoir seismic response were studied,and the corresponding forward model was established.Then,the seismic identification mode of reservoir in Z_(2)dn_(4) was summarized based on the actual data.Finally,the reservoir characteristics represented by plane seismic amplitudeattribute were analyzed.The results show that the similarity of reservoir properties is an important source of multiple solutions of reservoir seismic response.Reservoir combination characteristics are important genetic basis for reservoir seismic difference.The seismic response of the reservoir at the top of Z_(2)dn_(4) is mainly the weakening or pull-down of the peak,the reservoir in Z_(2)dn^(2)_(4) can be identified by the characteristics of the middle bright spots and the bottom wave peaks of the upper submember,and the main identification basis of reservoir in Z_(2)dn^(1)_(4) is single bead reflection.Based on the actual seismic response characteristics,five seismic genetic identification models of reservoir in Z_(2)dn_(4) in Gaoshiti area have been established.The RMS amplitude attribute in GS1 well area has a certain corresponding relationship with the reservoir thickness,and accurate extraction of this attribute can provide a great reference for the effective prediction of reservoir in the study area.
作者
翁雪波
潘仁芳
胡明毅
蒋裕强
罗群
朱正平
WENG Xuebo;PAN Renfang;HU Mingyi;JIANG Yuqiang;LUO Qun;ZHU Zhengping(chool of Geosciences,Yangtze University,Wuhan 430100,Hubei;School of Geosciences,Southwest University of Petroleum,Chengdu 610500,Sichuan;Energy and Geoscience Institute,China University of Petroleum(Beijing),Beijing,102249)
出处
《长江大学学报（自然科学版）》
2022年第2期47-55,共9页
Journal of Yangtze University(Natural Science Edition)
基金
国家自然科学基金项目“川中地区埃迪卡拉系微生物白云岩成岩作用及储层孔隙定量演化”(42072171)
国家科技重大专项“致密储层地震属性解析预测技术研究”(2016ZX05047)
国家科技重大专项“地震预测及有利目标描述”(2016ZX05061)。
关键词
四川盆地
高石梯地区
灯影组
正演模拟
地震响应
地震成因识别模式
Sichuan Basin
Gaoshiti area
Sinian Dengying Formation
forward modeling
seismic response
identification mode of seismic genesis
