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沿断层布置的二维地震测线,往往由于反射波,断面波和绕射波的相互干涉,无法查清断层两侧的构造形态。沿断层布置的宽线剖面,有利于查清断层两侧构造形态,因为宽线剖面有较高的信噪比,便于波的空间分解。对宽线剖面作进一步的处理和解释,可获得地下反射点的平面位置、埋深、地层走向及真倾角等信息,并给出断层附近的构造形态。在多年勘探没有进展的 Y 区,采用宽线剖面后,查清了构造形态,获得了高产油流。根据该区勘探经验,作者提出四线六次覆盖的宽线剖面简易施工及资料解释方法,并指出应用宽线技术研究复杂地质构造的前景。
The two-dimensional seismic survey line along the fault may not be able to find out the structural forms on both sides of the fault due to the mutual interference of the reflection wave, the section wave and the diffraction wave. The wide line profile along the fault is conducive to the identification of structural patterns on both sides of the fault, because of the high signal-to-noise ratio of the wide line profile, which facilitates the spatial decomposition of the wave. For further processing and interpretation of the wide-line profile, the information such as the plane position, burial depth, formation strike and true dip angle of the underground reflection point can be obtained, and the tectonic morphology near the fault is given. After years of exploration, there is no progress in the Y zone, using a wide line profile, identified the structural morphology, obtained high oil flow. Based on the exploration experience in this area, the authors propose a simple construction and data interpretation method for wide-line profile with four-line and six-fold coverage, and point out the prospect of applying complex line technology to study complex geological structures.