【摘要】 四川盆地中部白庙地区须家河组在钻探中油气显示频繁,勘探潜力巨大,对白庙地区须家河组须二段、须四段开展油气检测研究十分必要。通过双相介质中流体检测原理与流程:即,根据地下双相介质的地震响应存在"低频共振、高频衰减"的现象,检测研究区目的层有利含油气范围的分布。研究区目的层地震资料波形完整、无切值无截频现象,地震资料品质较好;须二段和须四段储层地震响应特征表现为弱振幅,连续性好、频率低。根据双相介质流体检测流程对研究区29条总长890km的二维地震测线的须二段、须四段实施油气检测;应用须二段、须四段2个目的层在各条地震测线上做出的检测结果,再分别制作平面图,从而确定有利勘探区域。该技术对扩大勘探领域、寻找新的勘探区具有重要的现实意义。更多还原

【Abstract】 The Xujiahe Formation in Baimiao area in the middle part of Sichuan Basin has frequent oil and gas shows in drilling and it indicates tremendous exploration potential.It is important to develop the study of oil-gas detection in the Second Member and the Forth Member of Xujiahe Formation.The detection of distribution of favorable oil and gas range in the target strata is based on the fluvial detection principle and flow in two-phase medium,i.e.,based on the phenomenon of "low frequency resonance and high frequency attenuation" of seismic response of underground two-phase medium.The wiggles of seismic data are intact and complete.There are no phenomena of cut value and cutoff frequency,and the quality of seismic data is good.The seismic response of reservoirs of the Second Member and the Forth Member of Xujiahe Formation represents weak amplitude,good continuity and low frequency.According to the fluvial detection flow in two-phase medium,the oil-gas detection has been realized on 29 two-dimentional seismic profiles in the total thickness of 890km of the Second Member and the Forth Member of Xujiahe Formation in the study area.Implementing the oil-gas detecting result of two-target strata of the two members on every seismic profile,final plane figures are separately completed,so that the favorable exploration area is determined,which is of actual significance in expanding the exploration realm and in searching for new exploration areas.更多还原