陆相地震沉积学砂体识别技术

IDENTIFYING TECHNIQUE OF THE SANDBODIES BY CONTINENTAL SEISMIC SEDIMENTOLOGY

为了解决松辽盆地扶余油层陆相薄互层砂体识别的难题,发展完善了地震沉积学方法,形成了陆相地震沉积学砂体识别与沉积微相解释技术。在井-震联合精细标定的基础上,通过开展河流相地层小层对比保证了层序对比的等时性;采用基于参考标准层的层位拉平的精细地震层位解释提高了四级层序界面的解释精度;在最佳时窗地震子体内提取、优选有效地震属性,恢复相对古地貌分析沉积演化,基于地震属性开展井震联合地震沉积微相解释,实现了真正意义上的大比例尺沉积微相工业制图。

In order to solve the problem of recognizing the continental thin-interbedded sandbodies in Fuyu oil res- ervoirs of Songliao Basin, the seismic sedimentology is developed and improved, thus the techniques of continental seismic-sedimentology-sandbody identification and sedimentary microfacies interpretation are established. On the basis of fine calibration by well-seismic combination, the isochronism of the sequence correlation is ensured by means of the comparison of fluvial-facies individual layer correlation; and furthermore with the help of the fine in- terpretation of the seismic horizons leveled by the reference standard zones, the interpretation precision of the fourth-order sequence interfaces is enhanced; based on the extraction of the optimal time window seismic daughter, the optimization of the effective seismic attributes, the recovery of relative palaeogeomorphology, the analysis of the sedimentary evolution and moreover the seismic sedimentary microfacies explanation made by the integration of well and seismic data according to the seismic attributes, a true sense of the large-scale sedimentary microfacies industri- al mapping is realized.