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随着金湖凹陷油气勘探难度的不断加大,如何提高勘探的精度成为一个亟待解决的问题。金湖凹陷三河地区古近系戴南组(E_2d)勘探程度较低,却是金湖凹陷最具勘探潜力的目的层,但缺乏成熟理论作为指导,地震波传播规律不清楚,地下地质体地震响应特征不明确,成为金湖凹陷E_2d隐蔽型圈闭识别的制约因素。地震正演模拟技术可以用来研究地震波传播规律和明确地下地质体的地震响应特征,是提高勘探精度的有效途径。同时,砂泥岩的划分对油气的找寻也十分关键,明确砂泥岩区分的敏感参数可为正演研究提供参数依据,而测井资料岩性解释与岩石物理分析可以很好地进行地层砂泥岩分析。基于金湖凹陷三河地区的测井、钻井及地质资料,通过上述方法评价了该区的岩性及地震响应特征,为后续勘探工作提供了可靠资料。
With the increasing difficulty of oil and gas exploration in Jinhu depression, how to improve the accuracy of exploration becomes an urgent problem to be solved. However, exploration of E_2d in Paleogene of Sanhe area, Jinhu depression, is the most potential exploration target in Jinhu Sag. However, lack of mature theory as a guideline, the propagation law of seismic waves is unclear. The seismic response of underground geological bodies The characteristics are not clear, and become the restrictive factor of E 2 d concealed trap identification in Jinhu Sag. Seismic forward modeling technology can be used to study the law of seismic wave propagation and to clarify the seismic response characteristics of underground geological bodies, which is an effective way to improve exploration accuracy. At the same time, the division of sandstone and mudstone is also very crucial for the search of oil and gas. It is clear that the sensitive parameters of sandstone shale division can provide the basis for the forward research, while the lithology interpretation and petrophysical analysis of well logging data can well analyze the formation sandstone and mudstone . Based on the logging, drilling and geological data in Sanhe area of Jinhu depression, the lithology and seismic response characteristics of the area were evaluated by the above methods, which provided reliable data for subsequent exploration.