Patent ID: 11906691
Assignee: SCHLUMBERGER TECHNOLOGY CORPORATION
Field: Measurement (Instruments)
Classification: CPC G  E | IPC E  G

Claim 0:
1. A method for improving neutron interpretations in a subsurface formation comprising:
deploying a neutron tool directly in a borehole traversing the formation;
logging the formation using the neutron tool;
estimating mineral concentrations and kerogen concentrations at one or more depths in the subsurface formation;
estimating kerogen properties at the one or more depths in the subsurface formation;
calculating mineral properties at the one or more depths in the subsurface formation by summing a plurality of individual mineral abundances solved by infrared spectroscopy, wherein each of the plurality of individual mineral abundances is multiplied by a respective mineral property;
calculating a neutron-based log response to a rock matrix based upon, at least in part, the kerogen properties and the mineral properties at the one or more depths in the subsurface formation by subtracting a contribution from the rock matrix associated with the kerogen properties and the mineral properties from a total neutron response measured by the neutron tool when logging the formation; and
generating and delivering an output to a reservoir tool to alter operation of the reservoir tool, wherein the generated output is based at least in part on an interpretation of the neutron-based log response.