基于地震岩石物理分析与叠前地质统计学反演技术的齐家地区致密薄储层预测

发布时间：2018-05-18 09:28

本文选题：致密砂岩油 + 地震岩石物理分析　；参考：《石油物探》2017年06期

【摘要】：松辽盆地北部齐家地区青山口组钻遇致密砂岩油,但储集层岩石的矿物组成复杂、物性差,薄互层砂泥岩声阻抗叠置,井间薄储层地震预测因此难以开展,进而制约了致密油"甜点"区优选和水平井目标钻探的优化设计。针对上述问题,通过岩心声学测试及测井资料岩石物理分析,建立了适用于研究区地质特点的岩石物理模型,明确了不同岩性和"甜点"在纵波阻抗-纵横波速度比岩石物理解释图版中的弹性参数特征,为叠前反演统计分析和储层解释提供了基础资料。基于岩石物理分析,将叠前AVO反演和地质统计学建模相结合,采用高分辨率叠前地质统计学反演技术进行了致密薄储层预测及水平井优化设计,部署实施的5口水平井油砂钻遇率平均95%以上,表明基于地震岩石物理分析的叠前地质统计学反演技术是致密薄储层预测的有效手段。
[Abstract]:The Qingshankou formation in Qijia area, northern Songliao Basin, is drilled with tight sandstone oil, but the mineral composition of reservoir rock is complex, the physical property is poor, the acoustic impedance of thin interbedded sand and mudstone is superimposed, so it is difficult to carry out seismic prediction of thin reservoir between wells. Thus, the optimal selection of dense oil and the optimum design of horizontal well target drilling are restricted. In view of the above problems, a rock physical model suitable for the geological characteristics of the study area is established by means of core acoustic testing and log data rock physics analysis. The characteristics of elastic parameters of different lithology and "desserts" in the lithophysical interpretation plate of P-wave impedance to P-S wave velocity ratio are clarified, which provides basic data for pre-stack inversion statistical analysis and reservoir interpretation. Based on the petrophysical analysis, the prestack AVO inversion and geostatistical modeling are combined to predict the tight and thin reservoir and to optimize the horizontal well design by using the high-resolution pre-stack geostatistical inversion technique. The average drilling rate of oil sand in 5 horizontal wells is over 95% which indicates that the pre-stack geostatistical inversion technique based on seismic petrophysical analysis is an effective method for predicting tight and thin reservoirs.
【作者单位】：大庆油田有限责任公司勘探开发研究院;大庆油田有限责任公司第六采油厂;
【分类号】：P618.13

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