Practical guide for testing and maintenance of high temperature drilling fluids during drilling, coring, logging, and cementing wellbores

Technical Report · Fri Feb 01 00:00:00 EST 1991

DOI:https://doi.org/10.2172/6106340· OSTI ID:6106340

Carney, L L; Guven, N ^[1]

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1. Texas Tech Univ., Lubbock, TX (USA). Dept. of Geosciences

Control of mud weight, fluid rheology, and loss of fluids from the mud system are the most important parameters that must be monitored and controlled during any drilling operation on a mud system. Also, alkalinity control is of paramount importance of systems where the pH is kept below 10.0 because of the differences in the chemical reactions on clays and precipitation of carbonates. Ideally, one must be able to duplicate down-hole conditions of temperature, pressure, shear stress and differential pressure between the column of fluid and the formation. Unfortunately, the instrumentation for monitoring the above is either very scarce, nonexistent, or does not completely duplicate downhole conditions. Therefore, a thorough working knowledge and understanding of chemical reactions from laboratory studies that will take place in a given system under downhole conditions is helpful. There should be a sound scientific foundation established for any phenomenon before attempting to apply it in field procedures and utilization. During the past several years the authors have conducted detailed research on a variety of clay minerals for use as a primary viscosifier for water base drilling fluids. The following is a review of their findings. 6 refs., 6 figs., 3 tabs.

• Research Organization: Sandia National Lab. (SNL-NM), Albuquerque, NM (United States); Texas Tech Univ., Lubbock, TX (USA). Dept. of Geosciences
• Sponsoring Organization: USDOE; USDOE, Washington, DC (USA)
• DOE Contract Number: AC04-76DP00789
• OSTI ID: 6106340
• Report Number(s): SAND-88-7114; ON: DE91009097
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
DRILLING FLUIDS
CHEMICAL PROPERTIES
CHEMICAL REACTIONS
WELL DRILLING
PROCESS CONTROL
ATTAPULGITE
BENTONITE
CALCIUM
CARBONATE MINERALS
CHEMICAL COMPOSITION
CLAYS
DENSITY
EVALUATION
GELS
HYDROGEN SULFIDES
ION EXCHANGE
LOST CIRCULATION
MAGNESIUM
MEASURING INSTRUMENTS
MEASURING METHODS
MONITORING
PH VALUE
POLYMERS
POTASSIUM
PRECIPITATION
RECOMMENDATIONS
RESERVOIR PRESSURE
RESERVOIR TEMPERATURE
RHEOLOGY
SEPIOLITE
SHEAR PROPERTIES
SODIUM
SOLUBILITY
SWELLING
VISCOSITY
WATER POLLUTION
WEIGHT
ALKALI METALS
ALKALINE EARTH METAL COMPOUNDS
ALKALINE EARTH METALS
CHALCOGENIDES
COLLOIDS
CONTROL
DISPERSIONS
DRILLING
ELEMENTS
FLUIDS
HYDROGEN COMPOUNDS
MAGNESIUM COMPOUNDS
MAGNESIUM SILICATES
MECHANICAL PROPERTIES
METALS
MINERALS
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
POLLUTION
SEPARATION PROCESSES
SILICATE MINERALS
SILICATES
SILICON COMPOUNDS
SULFIDES
SULFUR COMPOUNDS
422000* - Engineering- Mining & Underground Engineering- (1980-)