发明名称 |
METHOD FOR DETECTING DRILLING FLUID IN THE ANNULUS OF A CASED WELLBORE |
摘要 |
A method for logging a cased well to determine the quantity and location of any barite weighted drilling fluid in the annulus between the casing and the wall of the wellbore. A tool assembly having a neutron generator and a gamma scintillation detector is used to log the zone of interest. The neutrons introduced into the well by the neutron generator convert a portion of the barium-138 in the drilling fluid to barium-137m. The magnitude of the gamma photon peak charactristic of the decayof barium-137 is used to identify the quantity of drilling fluid present in the annulus as a function of depth. This method is especially useful identifying the existence of channels in a cemented wellbore annulus. |
申请公布号 |
AU8284287(A) |
申请公布日期 |
1988.06.23 |
申请号 |
AU19870082842 |
申请日期 |
1987.12.21 |
申请人 |
EXXON PRODUCTION RESEARCH CO. |
发明人 |
MARK EDWARD JORDAN;RICHARD CARL HAUT;WILLIAM EDWARD KLINE |
分类号 |
E21B47/10;G01N23/222 |
主分类号 |
E21B47/10 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|