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FE 02-16K Oil Show Evaluation

1.Take a mud sample, aside from the regular sample or bottoms up sample, when there are significant gas shows. If a significant gas peak arrives in between sampling intervals, a spot sample is caught along with a mud sample.

2.Pour mud sample into a shallow dish and observe under UV light. If nothing is seen, water is added to the mud and the mixture is stirred. Again the sample is observed under UV light.

ppt 36 trang xuanthi 28/12/2022 2720
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Nội dung text: FE 02-16K Oil Show Evaluation

  1. Oil Show Evaluation • Solid Hydrocarbons and Dead Oil • Oil show description • Hydrocarbon Odor • Oil Staining • Natural Fluorescence • Solvent Cut Fluorescence • Other Tests
  2. Sample Examination Procedure For HC Shows 3. The unwashed sample is also observed under UV light. 4. For the lithological samples, smell the sample first before observing it under the microscope. Observe sample under microscope for staining / bleeding. 5. Place some oil-stained cuttings, if any, into some of the depressions on the spot plate. Observe under microscope.
  3. Observing a Sample Under the UV Box
  4. Observing Mud Samples • Mud samples are poured into a container and observed under UV light • If no droplets of oil is seen, water may be added to reduce the viscosity and the solution is stirred
  5. Hydrocarbon Odor • Always check the sample for petroliferous odor • Odor may range from heavy, characteristic of low gravity oil, to light and penetrating, for condensate. • Use general terms for describing hydrocarbon odor: faint, moderate or strong
  6. Bleeding Core Sample
  7. Fluorescence
  8. Mineral Fluorescence Rock Type Fluorescence Color Dolomite, Sandy Limestone yellow, yellowish brown Some Limestones (magnesian) brown Chalk, chalky limestones purple Paper Shale yellow to coffee brown, greyish Fossils yellow-white to yellow-brown Marl, Clay Marl yellowish to brownish grey Anhydrite grey brown, greyish, blue
  9. Do’s and Don’t’s • Carbon Tetrachloride is a cumulative poison and should not be used • Proper ventilation is needed when petroleum ether is used • Petroleum ether and acetone must be kept away from open flame • Do not store chemicals in plastic bottles • Test solvent under UV light before using them • Always work with small quantities in a well-ventilated area • Remember to wash your hands after using them. Do not eat without washing your hands after handling them.
  10. “Cut” • A “cut” is the hydrocarbon extracted by the solvent
  11. How To Do A Solvent Cut Test 1. Place a few drops of solvent, enough to immerse the sample, on the sample in the depression in the spot plate or the test tube. 2. Observe the following: 1. Cut speed 2. Cut nature 3. Cut color fluorescence and intensity 4. Cut color intensity 5. Residue color and intensity
  12. Samples Immersed In Solvent
  13. Cut Speed • This is an indication of both the solubility of the oil and the permeability of the sample. The speed can vary from instantaneous to very slow.
  14. Cut Color Fluorescence and Intensity • Observe the color and the intensity of the oil in the solvent under both UV and natural lights. The cut color observed under UV light could be called a cut color fluorescence
  15. Residue Color and Intensity • Residue color observed in natural light is the true color of the oil
  16. Acetone-Water Test • The test is done if the presence of oil or condensate is suspected, and provided no carbonaceous or lignitic matter is present in the rock sample
  17. End of Topic
  18. THE END