地震资料储层预测反演方法应用研究  

RESEARCH ON THE INVERSION METHODS OF SEISMIC RESERVOIR PREDICTION

作　　者：吴大奎[1] 唐必锐[2] 覃发兰[2] 吴彦玮 黄花香[2] 雷雪[2] 

机构地区：[1]四川石油管理局 [2]四川石油管理局地质调查处

出　　处：《天然气工业》2004年第10期38-40,i022,共4页Natural Gas Industry

摘　　要：地震资料储层预测反演方法存在的主要问题有反演结果要么受地震频带限制,分辨率低,要么受约束条件影响大,多解性强,不易得到满意的结果;这些反演方法大多是基于褶积模型的,因而离不开传统意义上的子波,不能避免子波相位、长度的不确定及子波纵横向的不稳定性;只能反演速度或波阻抗;此外,实际资料往往不能满足方法的先决条件,如测井资料误差、地震资料信噪比低和分辨率低、地质条件复杂等。文章提出了该方法在应用中必须注意分析方法的局限性和资料本身存在的问题,测井、地震资料要尽可能满足条件,对反演结果要结合方法本身和资料情况进行分析。同时指出,要研究适应性更强的非线性反演方法。最后,文章根据实例提出了具体问题和相应的解决办法。The major problems existing in the inversion methods of seismic reservoir prediction include that a satisfactory inversion result was not easy to be obtained because of either the low resolution caused by seismic frequency bands or the strong multi-solvability affected deeply by constraints; most of the inversion methods were based on the convolution model, thus being unable to leave out the conventional wavelets and to avoid the uncertainty of wavelet phase and length and the longitudinal-transversal unstability of wavelets; and only the velocity or impedance could be in-versed. In addition, the preconditions couldn't be always satisfied by the practical data, such as low-quality log data, low signal-to-noise ratio and low resolution, and complicated geological conditions, etc. The following problems, to which it is necessary to pay attention in applying the methods, are proposed in the paper, i. e. the limitations of the methods and the shortcomings of the data themselves should be analyzed; the log and seismic data should satisfy the demand of the conditions as far as possible; and the inversion results should be analyzed in combination with the method itself and the quality of data. Meanwhile it is pointed out that the nonlinear inversion method, which is of stronger adaptability, should be studied. Finally, some concrete problems and relevant resolved ways are put forward in the paper according to a case.

关 键 词：地震资料 反演方法 子波 储层预测 褶积模型 测井资料 波阻抗 文章 实际 具体问题 

分 类 号：P631.4[天文地球—地质矿产勘探]