Strata反演技术在柳屯洼陷沙三^(2-3)亚段储层描述中的应用

THE APPLICATION OF STRATA SEISMIC INVERSION TECHNIQUE TO THE DESCRIPTION OF S^(2-3) RESERVOIRS IN LIUTUN SAG OF DONGPU DEPRESSION

地震波阻抗反演技术已日益成为油气藏勘探、开发中储集层横向预测的重要手段。柳屯洼陷沙三2 -3 亚段同时发育浊积砂体和厚层盐岩 ,横向相变剧烈。笔者论述了Strata反演的原理及其在该区的应用 ,在大量统计的基础上建立了不同岩性与波阻抗之间的解释标准。通过对反演剖面的解释 ,明确了深水浊积扇向盐湖相的渐变关系 ,做出了各体系域的砂体等厚图 。

The seismic wave impedance inversion technique is becoming an increasingly important tool in carrying out reservoir prediction for oil exploration and development. There exist both turbidite sand and thick-bedded halite in S 2-3 formation of Liutun sag. The lithofacies vary greatly in transverse direction. The application of the Strata inversion technique in this area is discussed according to the data processing order, which mainly includes well logging data correction, wavelet extraction, correlation of the synthetic records with the seismic profile, establishment of the initial model, and the constraint inversion. Ideal results are achieved showing the gradual modification from the deep turbidite fan to the salt lake face. The contour map of the sand body in each system tract is made, so the spatial distribution of the reservoir is characterized.