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利用地震属性预测砂岩储集层厚度及含油饱和度 被引量:31

Predicting the sandstone reservoir thickness and oil saturation by using seismic attributes
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摘要 二连盆地阿南凹陷蒙古林油田下白垩统腾格尔组一段砂岩的非均质性很严重,油水分布十分复杂,为已投入开发的该油田进一步滚动勘探开发带来困难。应用该油田连片处理后的三维地震资料,精细制作了2口较深井的合成地震记录,经80余口井验证,准确确定了腾一段油层顶面地震反射层位,进行油层顶面构造形态精细解释。在此基础上,先应用Landmark自动解释系统,单道分时窗提取出四大类(振幅谱类,复地震道类,谱类,地层层序类)20种地震属性;再对它们进行相关分析,选出3种属性(最大波谷振幅,平均瞬时频率,正负值样点数比值)进行聚类分析,得到反映低频、高振幅的黑色地震属性点平面图;然后将所需井点的储集层参数与这3种属性参数进行多项式回归分析,得到不同地震属性所代表的储集层厚度和含油饱和度分布。将预测结果和实钻结果对比,砂岩厚度误差为1~2m,含油饱和度误差为1%~5%,预测结果可靠而直观,为蒙古林油田北部滚动勘探开发中的扩边工作部署提供了依据。 During progressive exploring and developing Menggulin oil field of Erlian basin, some difficulties arisen: the sand from Tengger Group of Lower Cretaceous is extremely heterogeneous and the distribution of oil and water is very complex. To solve this problem, by using re processed 3D data of the entire area, we created synthetic seismograms of two deeper wells, which were then verified by more than 80 wells. Then these seismograms were used to accurately define the strata, and detailed structure interpretation of top reservoir was performed. On the basis of the interpretation, we use Landmark interactive system to extract 20 seismic attributes, which can be grouped 4 classes: amplitude spectrum, duplicated seismic trace, spectrum and stratigraphy sequence. Through correlation analysis, three attributes (maximum amplitude of trough, mean instant frequency, ratio of positive sample to minus sample) can be selected to be used in polymerization analysis. Then a white seismic attribute distribution plane map reflecting low frequency and high amplitude can be gained. After that, combining the reservoir parameters of needed wells with the three attributes described above to perform polynomial regression analysis, then to get the depth of the reservoir and oil bearing saturation distribution. Comparing the predicted result to drilled result, the sand depth error is between 1 2 m, and the saturation error is between 1% 5%. From that, the authers think the predicted result reliable and visualized. This research result provides basis for further progressive exploration and development project of Menggulin oil field.
出处 《石油勘探与开发》 SCIE EI CAS CSCD 北大核心 2000年第1期92-94,共3页 Petroleum Exploration and Development
关键词 地震属性 砂岩 储集层厚度 含油饱和度 油气勘探 D seismic interpretation, Seismic data processing, Reservoir correlation, Prediction, Reservoir thickness, Oil saturation, Menggulin oil field, Progressive exploration and development
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  • 1Learning Poststack.PAL and RAVE Training Manual[]..1996

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