地震资料极性判别与道积分技术在渤中M油田的应用

渤中M油田的主力油层段埋藏较深，且地震资料主频较低,常规的反演技术应用效果较差。针对这些实际情况，结合储层均为砂、泥岩薄互层的特点，充分利用道积分技术不受钻井及构造解释影响、最大限度尊重原始地震资料的优势，更好地研究了M油田的储层展布。基于子波极性的精细分析及合成地震记录的验证，得到了与已钻井吻合度较高、能反映主要目的层段储层物性及厚度的道积分数据体；优选了该层段基于道积分数据体的正振幅之和作为敏感属性，准确预测了主力油层段储层的平面展布规律、调整井的储层厚度及油层厚度；在浅层通过优选基于道积分数据体的最小振幅属性，发现了一个成藏条件较好的河道砂体。经过井轨迹优化兼探该潜力砂体，新发现290×10⁴m³探明石油地质储量，在该砂体上投产的4口井使M油田的产量翻番，实现了油田的立体高效开发。

In Bozhong M Oilfield,the target reservoir is deep buried,and the frequency of the seismic data is low;the conventional inversion technology is less effective.For these facts,taking into account the thin interbedded sandstone-shale reservoir,make full use of the advantages of the trace integral technique respecting the original seismic data,we further study the reservoir distribution.Based on the polarity analysis of the seismic data and verification of synthetic seismogram,it gets a trace integral data volume which agrees well with the drilled wells and can reflect the property and thickness of the main reservoirs.It optimizes the attributes of sum of positive amplitude,accurately forecasts the distribution of the main reservoir and the reservoir thickness of the infill wells.In the shallow,by optimizing the attributes of minimum amplitude,a good channel sand body is discovered,and the proven oil geological reserve is 290×104 m3.In this new discovered sand body,4 wells doubled the oil production,and realized stereo efficient development of M oilfield.