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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。
The Xujiahe Formation in the Baimiao area in the central part of Sichuan Basin shows frequent oil and gas during drilling and has great potential for exploration. Therefore, it is necessary to carry out oil and gas exploration and study on the Xujiahe and Xujiahe formations of the Xujiahe Formation in the Baimiao area. Through the principle and flow of fluid detection in two-phase media: That is, according to the seismic response of underground two-phase medium, there exists the phenomenon of “low frequency resonance and high frequency attenuation”, and the distribution of favorable hydrocarbon-bearing range in the target area of the study area is detected. The seismic data in the target layer of the study area have complete waveform, no cut-off and no cut-off phenomenon, and the seismic data are of good quality. The seismic response characteristics of the second and the fourth member of the Xujiahe Formation show weak amplitude, good continuity and low frequency. According to the test flow of two-phase medium fluid, 29 sections of 2-D seismic survey line with total length of 890km in the study area shall be subjected to oil and gas exploration. Four sections of XS section 2 and 4 sections shall be used in each seismic survey line On the test results made, and then make a plan, respectively, to determine the favorable exploration area. This technology has important practical significance for expanding exploration area and finding new exploration area.