A model for predicting the density of oil-based muds at high pressures and temperatures

Journal Article · Fri Jun 01 04:00:00 EDT 1990 · SPE (Society of Petroleum Engineers) Drilling Engineering; (USA)

DOI:https://doi.org/10.2118/18036-PA· OSTI ID:7090878

Peters, E J; Chenevert, M E ^[1]; Zhang, C ^[2]

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1. Univ. of Texas (US)
2. Karaway Petroleum Technical School (CN)

A compositional material-balance model was used to predict the densities of diesel- and mineral-oil-based muds at elevated pressures and temperatures. The authors measured the densities of diesel oil, two mineral oils, and calcium chloride solutions from 78 to 350{degrees}F and from 0 to 15,000 psig. The measured densities were used in an existing compositional material-balance model to predict the densities of 11- and 17-lbm/gal oil-based muds. The authors also measured the densities of these muds at elevated pressures and temperatures and compared them with the predicted values. The results show excellent agreement between measured and predicted densities. The experimental density data were used to predict downhole densities and static wellbore pressures for the oil-based muds. Results show that the mineral-oil muds are not only more compressible than the diesel-oil muds, but also more susceptible to thermal expansion. Therefore, all the oil-based muds tend to give essentially the same static-wellbore-pressure profile.

• OSTI ID: 7090878
• Journal Information: SPE (Society of Petroleum Engineers) Drilling Engineering; (USA), Journal Name: SPE (Society of Petroleum Engineers) Drilling Engineering; (USA) Vol. 5:2; ISSN 0885-9744; ISSN SDENE
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
023000 -- Petroleum-- Properties & Composition
42 ENGINEERING
420400 -- Engineering-- Heat Transfer & Fluid Flow
ALKALINE EARTH METAL COMPOUNDS
BOREHOLES
CALCIUM CHLORIDES
CALCIUM COMPOUNDS
CALCIUM HALIDES
CAVITIES
CHEMICAL COMPOSITION
CHLORIDES
CHLORINE COMPOUNDS
DATA
DENSITY
DIESEL FUELS
DRILLING FLUIDS
EXPANSION
EXPERIMENTAL DATA
FLOW MODELS
FLUID FLOW
FLUIDS
HALIDES
HALOGEN COMPOUNDS
HIGH PRESSURE
HIGH TEMPERATURE
INFORMATION
MATHEMATICAL MODELS
MINERAL OILS
NUMERICAL DATA
OIL WELLS
OILS
ORGANIC COMPOUNDS
OTHER ORGANIC COMPOUNDS
PETROLEUM PRODUCTS
PHYSICAL PROPERTIES
THERMAL EXPANSION
WELLS