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辫状河道沉积砂体是一类常见的油藏储集层,砂体构造规律性差,油水关系复杂,油藏预测困难。利用地震道的子波分解来重构地震道,通过把地震道分解成一系列不同属性子波,用这些不同属性子波表述的地震道就可以得到不同的地层反射。由匹配追踪得到的地震信号具有很高的瞬时谱聚焦性,使得时—频分解技术完全重构地震信号非常简单。采用匹配追踪时—频分解技术对垦东701井区地震资料进行了解释,极大地改善了油藏储层的可解释性,使得地震资料反射特征和井资料相关性较好。基于该技术的处理结果,对垦东701井区明化镇和馆陶组地层的辫状河道沉积砂体的分布进行了预测,预测的储层分布辫状河道特征十分明显,并利用预测结果部署了3口井位,预测结果和钻遇结果完全吻合。
The braided channel sedimentary sand body is a common type of reservoir, with poor regularity of sand body structure and complicated oil-water relationship, which makes reservoir prediction difficult. Using the wavelet decomposition of the seismic traces to reconstruct the seismic trace, different seismic reflections can be obtained from the seismic traces expressed by these different attribute wavelets by decomposing the seismic trace into a series of different attribute wavelets. Seismic signals obtained from matching pursuit have very high instantaneous spectral focusing, making it very easy to completely reconstruct seismic signals by the time-frequency decomposition technique. Mathematic tracking time-frequency decomposition technique is used to interpret the seismic data of well 701 in Kendong area, which greatly improves the interpretability of reservoir and makes the correlation between seismic reflection features and well data better. Based on the processing results of this technology, the distribution of braided channel sedimentary sand bodies in the Minghua and Guantao formations in the well of Kendong 701 was predicted. The predicted braided channel characteristics of the reservoir are very obvious. Based on the prediction results Deployed three wells, the predicted results and drilling results exactly match.