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鄂尔多斯盆地马岭地区长81段主要发育长811、长8312套砂体,砂体薄、横向变化快。利用地震相分析技术,在地震正演分析的基础上,分别采用自组织神经网络波形分类及分频解释技术进行地震相分析,并将2种分析方法的结果进行补充印证,对马岭地区长811砂体、长831砂体地震相进行划分。在此基础上,对地震相单元中的钻井资料进行单井微相分析,并依此建立长811砂体、长831砂体地震相与沉积相的对应关系,将地震相转换为沉积相,研究砂体的分布特征及横向变化规律,对储层进行预测。在该区的实际应用中已取得较好效果。
Chang 81 section of Maling area in the Ordos Basin has a main development length of 811 and 8312 sets of sand bodies with thin sand bodies and rapid horizontal changes. Based on seismic forward analysis, seismic facies analysis was used to analyze the seismic facies by adopting the waveform classification and frequency division interpretation techniques of self-organizing neural networks respectively. The results of two kinds of analytical methods were supplemented and confirmed. 811 sand body, long 831 sand body seismic facies division. Based on this, single well microphase analysis of drilling data in seismic facies unit is established, and corresponding relationship between seismic facies and sedimentary facies of Chang 811 sandbody and Chang 831 sandstone is established, the seismic facies is converted into sedimentary facies, Research sandstone distribution characteristics and lateral variation, the prediction of the reservoir. In the practical application of the district has achieved good results.