准噶尔盆地低幅度背斜圈闭识别方法——以盆5井区圈闭为例
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摘要
随着准噶尔盆地勘探的深入,圈闭识别的难度越来越大,低幅度背斜圈闭的识别已成为人们关注的对象。以准噶尔盆地盆5井区圈闭识别为例,根据钻井结果和地震解释引发的矛盾,精细分析表层速度特征、地震速度资料,建立速度模型:利用模型正演和速度拟合以及速度模型建场方法,对盆5井区进行了重新构造成图研究。研究结果表明,盆5井区闭合面积应为40km2,闭合度应为40m,而不是5.6km2和12m,高点位置偏移4km,这一研究成果已被钻井所证实。
The stratigraphic trap identification is becoming more and more difficult with progressing petroleum exploration in Junggar basin. How to find the low-amplitude traps in it? Taking P-5 Wellblock in Junggar basin as an example, this paper examines the inconsistence between drilling and seismic interpretation for its low-amplitude trap identification, and includes the detailed analysis of subsurface velocity feature and seismic velocity data and the development of the velocity model. With the model showing forward modeling and velocity field modeling, remapping of the structure in P-5 Wellblock is made. The result shows that the existing trapping area becomes larger than before, and high spot moves four km toward southwest, which has been confirmed by drilling.
引文
[1]博蒙特AA,福斯特N H.油气圈闭勘探[M].刘德来,译. 北京:石油工业出版社,2002.
    [2]信荃麟,刘泽容.含油气盆地构造岩相分析[M].北京:地 质出版社,1993.
    [3]张厚福,张万选.石油地质学[M].北京:石油工业出版社, 1997.

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