地震特殊处理资料在万安盆地储层预测中的应用
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摘要
位于印支地块上的万安盆地属一走滑拉张盆地,其内主要发育始新世以来的新生代沉积,最大沉积厚度可达12500 m,盆地内发育众多类型各异的局部构造。就目前我国对万安盆地的勘探研究现状,要评价盆地局部构造的储层特征只有通过多种特殊处理地震资料的联合解释来实现。文章针对万安盆地①号构造特征,探讨了利用地震特殊处理资料预测万安盆地局部构造储层的可行性,并利用地震孔隙度异常、道积分、瞬时振幅、DIPOG等多种特殊处理资料,结合地震速度、地震相—沉积相分析,提取各类地震、地质信息,预测地层岩性,解释判断了地层中储层的发育状况及储集层类型,为万安盆地局部构造无井储层预测建立了一条行之有效的地震特殊处理资料综合评价方法。
Wan’an Basin being located on Indosinian landmass is a strike-slip-tension basin,in which there are mainly the Cenozoic (beginning at Eocene)deposits with maximum sedimentary thick of being up to 12500 m and many various local structures. Only by a comprehensive interpretation of various specially processing seismic data, can the evaluation of reservoir characteristics of the local structures in Wan’an Basin be realized according to the current situation of the exploration and investigation of the basin.In light of the features of structure No.1 in the basin, the feasibility of predicting the reservoirs in local structures in the basin by use of the specially processing seismic data is discussed in the paper.By applying several specially processing data as seismic porosity anomaly, trace integration, instantaneous amplitude and DIPOG, etc., and in combination with the seismic velocity and seismic facies-sedimentary facies analyses, various kinds of the seismic and geologic messages can be extracted, the formation lithology may be predicted, and the development circumstances and types of reservoirs can be interpreted and identified, thus providing an effective comprehensive evaluation method for the without-drilling-data reservoir prediction of the local structures in the basin.
Wan’an Basin being located on Indosinian landmass is a strike-slip-tension basin,in which there are mainly the Cenozoic (beginning at Eocene)deposits with maximum sedimentary thick of being up to 12500 m and many various local structures. Only by a comprehensive interpretation of various specially processing seismic data, can the evaluation of reservoir characteristics of the local structures in Wan’an Basin be realized according to the current situation of the exploration and investigation of the basin.In light of the features of structure No.1 in the basin, the feasibility of predicting the reservoirs in local structures in the basin by use of the specially processing seismic data is discussed in the paper.By applying several specially processing data as seismic porosity anomaly, trace integration, instantaneous amplitude and DIPOG, etc., and in combination with the seismic velocity and seismic facies-sedimentary facies analyses, various kinds of the seismic and geologic messages can be extracted, the formation lithology may be predicted, and the development circumstances and types of reservoirs can be interpreted and identified, thus providing an effective comprehensive evaluation method for the without-drilling-data reservoir prediction of the local structures in the basin.
引文
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