| 摘要 |
<p>A nuclear imaging probe 1 for measuring the density of a subsurface formation GF in a limited zone surrounding a well-bore hole WBH, the probe comprises:
- a pad 2 having a face arranged so as to be positioned in contact with a well-bore wall WBW,
- at least one radioactive source 4 arranged within the pad for transmitting incident photons PI towards the well-bore wall,
- at least one sensor 5 spaced away from the radioactive source and isolated from the radioactive source by a shield 6 arranged into the pad for receiving photons scattered PS by the limited zone. The sensor 5 is a diamond sensor coupled to an electronic arrangement 3, the electronic arrangement being arranged to polarize the diamond sensor and to determine density of the subsurface formation based on scattered photons measured by the diamond sensor.</p> |
