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美国怀俄明、内布拉斯加、南达科他三个州之间的东粉河盆地内明路沙层的中段,新发现了几处莱奥砂岩产油层。这些有经济价值的砂岩体,重新引起人们对该区的勘探兴趣。垂直地震剖面和模型研究表明,能测量到的地震振幅异常通常与莱奥I组厚砂岩透镜体有关。为了证明这一说法,在相隔19公里远的二口井之间,布置了地震连井试验测线。其中一口井存在有工业价值的莱奥I组砂岩,另一口井莱奥I组是无油的薄砂岩。已知存在厚砂岩透镜体的那口井,地震剖面上预测有振幅异常显示。连井地震剖面上另外两处也出现莱奥I组砂岩振幅异常,这些异常预示存在有另外的砂岩透镜体。
In the middle of the Mingluosha Formation in the East Powder River Basin between the states of Wyoming, Nebraska and South Dakota in the United States, several Leo sandstone oil reservoirs have been newly discovered. These economically valuable sandstone bodies have rekindled interest in exploration in the area. Vertical seismic profiles and modeling studies show that the anomalies of seismic amplitude that can be measured are usually related to the Leo I thick sandstone lenses. To prove this, seismic well-well test lines are arranged between two wells 19 km apart. One of the wells has industrial value of the Leo I sandstone and the other well of the Leo I group is oil-free thin sandstone. Well known to exist thick sandstone lenses, the seismic profile predicted amplitude anomalies. The sandstone anomalies in the Leo I Formation also occur at two other locations in the continuous seismic section, indicating the presence of additional sandstone lenses.