Nuclear tool
AssigneeSchlumberger Technology Corporation
InventorsMichael Evans, Christian Stoller
Life of this patent
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Abstract
A nuclear measurement tool for determining properties of a formation penetrated by a borehole fluid. The tool comprising: a nuclear source for irradiating the formation and a a plurality of nuclear sensors each operating with a different depth of investigation into the formation. The tool further comprising processing means for receiving the data from the nuclear sensors and based thereon determining the properties of the formation by taking into account the penetration of the borehole fluid.
Claims26
A nuclear measurement tool for determining at least one property of a formation penetrated by a borehole fluid, the tool comprising:
- a nuclear source for irradiating the formation;
- a plurality of nuclear sensors each operating with a different depth of investigation into the formation;
- and
- processing means for receiving data from the nuclear sensors and based thereon:
- a) determining a level of penetration of the borehole fluid into the formation;
- and, b) determining the at least one property of the formation taking into account the level of penetration of the borehole fluid.
A nuclear measurement nuclear tool for determining an invasion profile of penetration of a borehole fluid into a formation, the tool comprising:
- a nuclear source for irradiating the formation;
- a plurality of nuclear sensors each operating with a different depth of investigation into the formation;
- and
- processing means for receiving data from the nuclear sensors and based thereon determining the invasion profile;
- wherein at least one of the plurality of nuclear sensors is a gamma ray detector and the gamma ray detector is positioned below the nuclear source.
Dependencies are inferred from the claim text.