基于波形分析技术的WZ油田流三段储层预测研究

Application of Waveform Analysis in Predicting Reservoir in Liu-3 Member of WZ Oilfield

基于WZ油田流三段的复杂性,运用波形分析技术对其进行了储层预测。对目标区的波形进行了分类,结合波形分析结果与已钻井储层物性相比较,最后利用波形分析结果进行地震相分析。研究表明,以强波峰波谷、强波谷为主的波形所对应的已钻井储层物性较差,以弱复波和弱半峰半谷为主、以强复波为辅的波形所对应的已钻井储层物性较好;WZ油田目标区北侧以强半峰半谷、强波谷为代表的波形,在地震相上反映为扇三角洲平原,向南在弱复波、弱半峰半谷和强复波为主的波形,在地震相上反映为扇三角洲前缘;目标区中部以强半峰半谷、强波谷为主的波形,在地震相上反映为水下分流河道间沉积-前扇三角洲-滨浅湖泥沉积;目标区南侧以弱复波、弱半峰半谷为主的波形,在地震相上反映为扇三角洲前缘。

Based on the complexity of Liu-3Member of the WZ oilfield,the technique of waveform analysis was used for its reservoir prediction.The waveform in the target zone was classified first,and its result is compared with the physical property of drilled holes.The obtained result is used for a seismic analysis.The result indicates that the physical properties of the strong wave crest and waveform based on the strong wave crest were poorer,the physical properties were good for the strong half wave crest half trough type and strong trough type.In the north of the WZ Oilfield,the waveforms are strong half wave crest half trough type and strong trough type,it shows the fan delta plain in the seismic facies,the waveforms change to weak complex wave type,weak half wave crest half trough type and strong complex wave type southward,it shows the fan delta front;In the middle of the work area where the waveforms are strong half wave crest and half trough type and strong trough type,it shows the subaqueous distributary channel deposits-front fan delta-shore shallow lake mud deposition;In the south of the work area where the waveforms are weak complex wave type and weak half wave crest half trough type,it shows the fan delta front.