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    • 4. 发明授权
    • Method, system and apparatus for determining rock strength using sonic logging
    • 使用声波测井确定岩石强度的方法,系统和装置
    • US07526385B2
    • 2009-04-28
    • US11821451
    • 2007-06-22
    • Colin M. Sayers
    • Colin M. Sayers
    • G01V1/40G06G7/48
    • G01V1/50
    • A method is disclosed for determining a rock strength of an Earth formation, including: receiving a signal representing a measured variation of velocities or slownesses as function of radius from and azimuth around a borehole; generating predictions from a Mechanical Earth Model (MEM) representing predictions of a variation of stress and hence velocity as a function of distance from, and azimuth around, the borehole, the MEM including a rock strength model adapted for generating a further prediction representing a predicted variation of velocities or slowness; changing the rock strength in the rock strength model of the Mechanical Earth Model until the further prediction substantially matches the measured variation in velocity around and from the borehole; and generating a set of parameters, wherein the parameters are used to populate the MEM and are used in subsequent calculations.
    • 公开了一种用于确定地球岩石的岩石强度的方法,包括:接收表示测量的速度变化或速度变化的信号,作为围绕钻孔的半径和方位角的函数; 产生来自机械地球模型(MEM)的预测,其表示应力的变化的预测,并且因此表示作为距钻孔的距离和方位角的函数的预测,所述MEM包括适于生成代表预测的另外的预测的岩石强度模型 速度变化或缓慢; 改变机械地球模型的岩石强度模型中的岩石强度,直到进一步的预测基本上与测量的围绕和从钻孔的速度变化相匹配; 以及生成一组参数,其中所述参数用于填充所述MEM并用于随后的计算。
    • 5. 发明授权
    • Method and system for pre-drill pore pressure prediction
    • 预钻孔压力预测方法与系统
    • US07299132B2
    • 2007-11-20
    • US11499931
    • 2006-08-07
    • Colin M. SayersRichard A. Birchwood
    • Colin M. SayersRichard A. Birchwood
    • E21B44/00G01V9/00
    • G01V1/284G01V1/30G01V1/306
    • A method for pore pressure prediction. The method includes obtaining a stress sensitivity coefficient, obtaining a compressional wave (P-wave) velocity and a shear wave (S-wave) velocity for a pre-drill location and obtaining a first predicted pore pressure. Further, the method includes iteratively performing calculating a total stress value associated with the pre-drill location using the first predicted pore pressure associated with the pre-drill location, and calculating a second predicted pore pressure associated with the pre-drill location using a stress-pressure relationship equation, a stress-velocity relationship equation, the stress sensitivity coefficient, a reference location, and at least one selected from a group consisting of the P-wave velocity and the S-wave velocity for the pre-drill location, and adjusting a drilling operation associated with the pre-drill location, based on the second predicted pore pressure.
    • 一种孔隙压力预测方法。 该方法包括获得应力灵敏度系数,获得预钻孔位置的压缩波(P波)速度和剪切波(S波)速度,并获得第一预测孔隙压力。 此外,该方法包括使用与预钻井位置相关联的第一预测孔隙压力迭代地执行计算与预钻井位置相关联的总应力值,以及使用应力计算与预钻井位置相关联的第二预测孔隙压力 压力关系式,应力 - 速度关系式,应力灵敏度系数,参考位置,以及从由钻前位置的P波速度和S波速度组成的组中选择的至少一个,以及 基于第二预测孔隙压力来调整与钻前位置相关联的钻孔操作。
    • 6. 发明授权
    • Method and system for pre-drill pore pressure prediction
    • 预钻孔压力预测方法与系统
    • US07617051B2
    • 2009-11-10
    • US11844303
    • 2007-08-23
    • Colin M. SayersRichard A. Birchwood
    • Colin M. SayersRichard A. Birchwood
    • E21B44/00G01V9/00
    • G01V1/284G01V1/30G01V1/306
    • In general, the invention relates to a method for pore pressure prediction. The method includes obtaining a compressional wave (P-wave) velocity and a shear wave (S-wave) velocity for a pre-drill location, calculating an effective stress at the pre-drilling location using a stress-velocity relationship equation, the compressional wave (P-wave) velocity and the shear wave (S-wave) velocity, obtaining a total stress at the pre-drill location, calculating a predicted pore pressure, at the pre-drill location, using the effective stress, the total stress and a stress-pressure relationship equation, and adjusting a drilling operation associated with the pre-drill location, based on the predicted pore pressure.
    • 通常,本发明涉及一种用于孔隙压力预测的方法。 该方法包括获得预钻井位置的压缩波(P波)速度和剪切波(S波)速度,使用应力 - 速度关系方程计算预钻井位置处的有效应力,压缩 波(P波)速度和剪切波(S波)速度,在钻前位置获得总应力,在钻前位置计算预测的孔隙压力,使用有效应力,总应力 和应力 - 压力关系式,并且基于预测的孔隙压力来调整与钻前位置相关联的钻孔操作。