| 摘要 |
A method for determining a property of earth formations surrounding a bor ehole, including the following steps: isolating a region of the borehole, an d obtaining a sample of borehole fluid from the isolated region; and impleme nting measurements, dowhole, of the Raman scattering of electromagnetic ener gy directed at the fluid sample; the property of the earth formations being determinable from the measurements. In a disclosed embodiment, the steps of isolating a region of the borehole and obtaining a sample of borehole fluid from the isolated region include: providing a logging device in the borehole in sealing engagement with the isolated region, causing formation fluid fro m the isolated region to flow in a flow line of the logging device, and prov iding a measurement cell in the logging device which receives the sample of formation fluid via the flow line.
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