基于地震速度谱的深水区地层压力预测
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摘要
针对目前深水区油气勘探缺乏足够钻井资料的问题,提出利用地震速度谱数据结合等效深度法进行地层压力预测的方法。与传统的利用地层层速度预测地层压力的方法不同,该方法使用地震瞬时层速度进行地层压力预测,不仅可以反映地层压力的横向展布趋势,同时还能刻画在一套地层内部的压力垂向变化。孟加拉扇深水区X区块的应用效果表明,该方法可以达到预期的地层压力预测要求。
In view of the lack of enough drilling data of the exploration in the deep-water area, the method for formation pressure prediction using seismic velocity spectrum data combined with equivalent velocity was proposed in the paper. Different from the traditional methods of formation pressure prediction by formation interval velocity, formation pressure was predicted by seismic instantaneous interval velocity, which could not only reflect the horizontal distribution tendency of formation pressure, but also portray the vertical changes ofinterior pressure in a suit of formations. The application results of X Block in the deep-water area of Bengal showed the method could meet the prospective demand of predicting formation pressure.
In view of the lack of enough drilling data of the exploration in the deep-water area, the method for formation pressure prediction using seismic velocity spectrum data combined with equivalent velocity was proposed in the paper. Different from the traditional methods of formation pressure prediction by formation interval velocity, formation pressure was predicted by seismic instantaneous interval velocity, which could not only reflect the horizontal distribution tendency of formation pressure, but also portray the vertical changes ofinterior pressure in a suit of formations. The application results of X Block in the deep-water area of Bengal showed the method could meet the prospective demand of predicting formation pressure.
引文
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[2]W.R.Fillippone.Estimation of formation parameters and the prediction of overpressure from seismic data.Presented at the SEG Research Symp.Geopressure studies.Paper R1.41982.10:17～21
[3]张蓉,徐群洲,帕尔哈提等.对提高地层压力预测精度的探讨——声波测井层速度与地震层速度的关系.石油天然气学报(江汉石油学院学报),2010,32(2):274～276
[4]卞从胜,柳广弟.异常地层压力的综合预测方法及其在营尔凹陷的应用.地质科技情报,2009,28(4):1～6
[5]李新宁,梁浩,黄卫东等.异常地层压力地震预测方法及应用研究.石油天然气学报(江汉石油学院学报),2007,29(3):387～390
[6]陈学国.三维地层压力预测方法及应用研究.石油钻探技术,2005,33(3):13～15
[7]张卫华,何生,郭全仕.地震资料预测压力方法和展望.地球物理学进展,2005,20(3):814～817
[8]陆基孟.地震勘探原理.山东东营:石油大学出版社,2001:252～254
[9]张传进.地震层速度预测地层压力研究.石油钻采工艺,1998,20(2):14～17
[10]云美厚.地震地层压力预测.石油地球物理勘探,1996,31(4):57～58
[11]刘震.储层地震地层学.北京:地质出版社,1997,206～217
[12]赵文智,柳广弟,苗继军等译.异常地层压力成因与预测.北京:石油工业出版社,2004:100～131
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