公开(公告)号：US06956204B2

公开(公告)日：2005-10-18

申请号：US10249274

申请日：2003-03-27

申请人： Chengli Dong ,  Peter S. Hageman ,  Oliver C. Mullins ,  Go Fujisawa ,  Soraya S. Betancourt ,  Julian Pop ,  Andrew L. Kurkjian ,  Toru Terabayashi ,  Hani M. Elshahawi

发明人： Chengli Dong ,  Peter S. Hageman ,  Oliver C. Mullins ,  Go Fujisawa ,  Soraya S. Betancourt ,  Julian Pop ,  Andrew L. Kurkjian ,  Toru Terabayashi ,  Hani M. Elshahawi

IPC分类号： E21B47/10 ,  G01N21/35 ,  G01N21/53 ,  G01N33/28 ,  G01V5/00

CPC分类号： G01N21/359 ,  E21B47/10 ,  E21B47/102 ,  G01N21/3504 ,  G01N21/3577 ,  G01N33/2823

摘要： A method for determining properties of a formation fluid including obtaining data related to an optical density at a methane peak and an optical density at an oil peak for a fluid sample at a plurality of times, calculating an apparent gas-oil-ratio of the sample fluid from the optical density of the fluid sample at the methane peak to the optical density of the fluid sample at the oil peak at each of the plurality of times based on the data, selecting a power function of a sampling parameter for a buildup of the apparent gas-oil-ratio, calculating an exponential constant of the power function based on the data, and determining at least one selected from the group consisting of a contamination free gas-oil-ratio and a percent contamination.

摘要翻译： 一种用于确定地层流体性质的方法，包括获得与多个次数相关的甲烷峰值的光密度和油峰值处的光密度相关的数据，计算样品的表观瓦斯油比 基于数据，在多个时间点从甲烷峰值处的流体样品的光密度到处于油峰处的液体样品的光密度的流体，选择用于积累的样品的取样参数的功率函数 基于该数据计算功率函数的指数常数，并且确定从由无污染的瓦斯油比和污染百分比组成的组中选择的至少一个。