测井组合识别-地震联合反演法预测薄层生物灰岩——以沾化凹陷孤北斜坡区沙一段底部为例
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摘要
陆相湖盆中的薄层生物灰岩是一个被忽视的油气勘探的重要领域。由于层薄、横向变化大以及埋藏深,用单一、常规的方法难以预测。通过对孤北斜坡区薄层生物灰岩的预测实践,提出了利用测井组合和地震反演联合预测薄层生物灰岩的方法——测井组合识别-地震联合反演法,其基本思路是:首先利用钻井、录井资料建立测井组合曲线综合识别薄层生物灰岩的判别模式,其次将判别模式识别出生物灰岩的井参与高精度的岩性反演,从井出发依据生物灰岩在反演剖面上的表现特征向四周延伸追踪,由此可获得薄层生物灰岩的平面展布特征。
The thin biolimestone was an important petroleum exploration area that was ignored in continental deposit basin.Because of thin layer,big lateral changes and deep burial,it was difficult to be predicted by using unique conventional method.By predicting the bio-limestones in thin layers of Gubei slope area,it is proposed that the method of logging combination-joint seismic inversion is used to predict the biolimestones.Its basic idea is that drilling and log data are first used to establish a pattern for judging the biolimestone with logging curve combination,and then the parameter of biolimestones obtained by pattern recognition is inverted with high precision lithology;based on the characters of the biolimestone on the inversion profile,it extends circumferentially,by which the areal distributive characteristics of the biolimestones in thin layers are obtained.
The thin biolimestone was an important petroleum exploration area that was ignored in continental deposit basin.Because of thin layer,big lateral changes and deep burial,it was difficult to be predicted by using unique conventional method.By predicting the bio-limestones in thin layers of Gubei slope area,it is proposed that the method of logging combination-joint seismic inversion is used to predict the biolimestones.Its basic idea is that drilling and log data are first used to establish a pattern for judging the biolimestone with logging curve combination,and then the parameter of biolimestones obtained by pattern recognition is inverted with high precision lithology;based on the characters of the biolimestone on the inversion profile,it extends circumferentially,by which the areal distributive characteristics of the biolimestones in thin layers are obtained.
引文
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