Donald G. Hill, Ph.D., 

R.Gp., R.G., R.P.G.

Consulting Petrophysicist

"The World is my District"


California Registered Geophysicist No. 170

California Registered Geologist No. 6043

Kentucky Registered Professional Geologist No. 1624

Texas Licensed Professional Geophysicist No. 6289


Formation Water Salinity is critical to Estimating Hydrocarbon Volumetrics  



The formation water salinity model above is from a fresh-water lacustrine depositionial environment, with immature hydrocarbon reserves.  Knowing the correct formation water salinity was critical to estimating hydrocarbon reserves in this situation.  Evaluation was accomplished by first building water salinity models, such as the one above to identify anomalous "fresh-water sands" for evaluation and providing the appropriate water resistivities for the evaluation.

Do You Have a Difficult Formation Evaluation Problem, Which Requires a Non-Traditional Approach?

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Contact:  Donald G. Hill at: Cell/Business Phone:  +(925) 437-5748,   FAX:   +(309) 420-7354,   Home Phone:  +(925) 947-1541  


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