基于波形指示反演的窄薄储层定量预测

针对渤海湾KL油田古近系沙三段单砂层厚度薄、砂体变化快、薄互层沉积、储层预测精度低等难题，提出利用地震高频段的波形信息代替变差函数，优选出能够反映岩性的敏感参数参与储层模拟，有效提升储层反演的纵、横向分辨率，更精确地刻画砂体的空间展布形态及范围，实现了波形指示反演下的窄薄储层预测。开发井实钻表明：砂体识别厚度达到5 m以下，储层符合率提高至85.7%。该方法有效提高了窄薄储层预测精度，对海上稀井网条件下窄薄储层的预测具有一定的指导意义。

In order to solve the problems of thin single sand layer, fast sand body change, thin interbedded sedimentation and low reservoir prediction accuracy in the third member of Shahejie Formation of Paleogene in Bohai KL Oilfield, it is proposed to replace the variation function with the waveform information in the high-frequency seismic section, and select the sensitive parameter that can reflect the lithology to participate in the simulation, which effectively improves the vertical and horizontal resolution of reservoir inversion, and more accurately depicts the spatial distribution form and range of the sand body. The narrow and thin reservoir prediction under waveform indication inversion is realized. The actual drilling of development wells shows that the identification accuracy of thin interbeds by seismic waveform indication inversion is less than 5 m, and the coincidence rate between inversion results and actual drilling is 85.7%. Seismic waveform indication inversion can effectively improve the prediction accuracy of narrow and thin reservoirs, providing a reference for the identification of narrow and thin reservoirs under the condition of offshore wide well spacing.