吉尔嘎朗图凹陷吉东地区腾二段地震储层预测

下白垩统腾格尔组二段为吉尔嘎朗图凹陷吉东地区主要含油气层之一，该区断裂发育，腾二段储层受断裂控制，横向连通性差。通过对地震、地质和测井等资料的对比分析，在精细构造解释的基础上，提取并优选出地震反射强度、均方根振幅 、平均能量、平均峰值振幅、振幅变化共5种地震属性，同时对腾二段进行地震波阻抗反演和伽马属性反演，综合地震属性和地震反演结果，对腾二段储层的几何形态和空间展布进行预测，并结合圈闭分布特征认为:LIN20井南和JI86井南为吉东地区腾二段油气勘探较有利地区；JI67井南部腾二段砂体分布范围和厚度相对较大，且砂泥岩匹配关系良好，应是地层岩性油气藏勘探有利地区。

APPLICATION OF SEISMIC TECHNIQUES TO RESERVOIR PREDICTING IN THE SECOND MEMBER OF TENGGEER FORMATION IN THE EASTERN JIERGALANGTU SAG, THE ERLIAN BASIN

One of the main oil-bearing layers in the eastern Jiergalangtu sag was found in the Lower Crataceous second member of the Tenggeer formation,which was restricted by faults with bad horizontal connectivity due to the developed faults here.Through comparative analysis on seismic,geologic and logging data and based on meticulous structure elucidation,this paper extracts and optimizes five kinds of seismic attributes,i.e.,seismic reflection strength,root mean square(RMS)amplitude,average energy,average peak amplitude and variance in amplitude,and completes seismic wave impedance inversion and gamma attribution inversion.Combining the results from inversion and the above-mentioned five seismic attributes,we predicted the geometry and space distribution of reservoirs in the second member of Tenggeer formation and according to the traps pattern here we concluded that the southern area to the well LIN20 and JI86 is favorable for oil and gas exploration,and the south to the well JI67 is favorable area for lithologic hydrocarbon reservoirs because there are relatively wider range of sand bodies with bigger thickenss and better matching relationship between sandstones and mudstones.