发明名称 |
Method to estimate pore pressure uncertainty from trendline variations |
摘要 |
Disclosed is a method for estimating a pore pressure of an earth formation penetrated by a borehole and an associated uncertainty. The method includes: conveying a carrier through the borehole; performing formation measurements relating to porosity at a plurality of depths in the borehole using a downhole tool coupled to the carrier; defining a first depth interval and a second depth interval deeper than the first depth interval, the first depth interval comprising a first set of formation measurement points and the second depth interval comprising a second set of formation measurement points; establishing a plurality of trendlines of depth versus porosity-related measurements using a processor with each trendline in the plurality of trendlines extending from a point in the first depth interval through a point in the second depth interval; and calculating a pore pressure line and associated uncertainty using the plurality of trendlines. |
申请公布号 |
US8788208(B2) |
申请公布日期 |
2014.07.22 |
申请号 |
US201113229212 |
申请日期 |
2011.09.09 |
申请人 |
Baker Hughes Incorporated |
发明人 |
Wessling Stefan;Pei Jianyong |
分类号 |
G01V1/40 |
主分类号 |
G01V1/40 |
代理机构 |
Cantor Colburn LLP |
代理人 |
Cantor Colburn LLP |
主权项 |
1. A method for estimating a pore pressure of an earth formation penetrated by a borehole and an associated uncertainty, the method comprising:
conveying a carrier through the borehole; performing formation measurements relating to porosity at a plurality of depths in the borehole using a downhole tool coupled to the carrier; defining a first depth interval and a second depth interval deeper than the first depth interval, the first depth interval comprising a first set of formation measurement points and the second depth interval comprising a second set of formation measurement points; establishing a plurality of trendlines of depth versus porosity-related measurements using a processor with each trendline in the plurality of trendlines extending from a point in the first depth interval through a point in the second depth interval; and calculating a pore pressure line and associated uncertainty using the plurality of trendlines. |
地址 |
Houston TX US |