Response of a Gulf Coast Drilling Mud to Chemicals, Temperature and Heat-treatment

Fancher, George H.; Whiting, Robert L.

doi:10.2118/943233-g

Cited by 2 publications

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“…The motion of grain boundaries is controlled by their mobility and the applied driving force . As was predicted theoretically [1,2] and shown by numerous experiments [3][4][5][6][7][8], the rate of boundary migration is proportional to the acting driving force =…”

Section: Introductionmentioning

confidence: 77%

Motion of Grain Boundaries: Experiments on Bicrystals

Molodov

2015

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Recent research on grain boundary migration is reviewed. Novel in-situ measuring techniques based on orientation contrast imaging and the experimental results obtained on specially grown bicrystals are presented. Particularly, the investigated faceting and migration behavior of low angle grain boundaries under the curvature force in aluminum bicrystals was addressed. In contrast to the pure tilt boundaries, which remained straight/flat and immobile during annealing at elevated temperatures, mixed tilt-twist boundaries readily assumed a curved shape and steadily moved under the capillary force. Computational analysis revealed that this behavior is due to the inclinational anisotropy of grain boundary energy, which in turn depends on boundary geometry. The migration of planar grain boundaries induced by a magnetic field was measured in bismuth and zinc bicrystals. Various structurally different boundaries were investigated. The results revealed that grain boundary mobility essentially depends on the misorientation angle and the inclination of the boundary plane. Stress driven boundary migration in aluminium bicrystals was observed to be coupled to a tangential translation of the grains. The activation enthalpy of high angle boundary migration was found to vary non-monotonously with misorientation angle, whereas for low angle boundaries the migration activation enthalpy was virtually the same. The motion of the mixed tilt-twist boundaries under stress was observed to be accompanied by both the translation of adjacent grains parallel to the boundary plane and their rotation around the boundary plane normal.

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Section: Introductionmentioning

confidence: 77%

Motion of Grain Boundaries: Experiments on Bicrystals

Molodov

2015

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“…In all, 26 cores of Third Bradford sand, 5 of Bartlesville sand, 4 of Illinois Siggins sand, and one I8-in. core from the Franklin mine sand have been flooded with tap water, with treated fresh input waters taken from a Bradford lease, with Bradford field brines, and with artificial brines.…”

Section: Simple Laboratory Experimentsmentioning

confidence: 99%

Advantages of Brines in Secondary Recovery of Petroleum by Water-flooding

Hughes¹,

Pfister²

1947

Transactions of the AIME

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THE necessity for getting more water into sands of low permeability in any secondaryrecovery water-flood operation in order to recover all the available oil always has been a major problem. In the early days of waterflooding the addition of soda ash and caustic soda to fresh input waters was recommended and tried without success in the Bradford field. The most frequent difficulty was sand plugging. The use of natural and artificial brines often has been suggested for water-flooding, in the belief that laboratory observations of decreasing fresh-water throughput rates in measuring water permeabilities of consolidated sand cores might be partially explained by swelling of clays.A review of available literature bearing on the subject and related laboratory experiments are presented herein, offering an explanation for failure in use of soda ash-and caustic soda waters and supporting the recent concept that every water used for input purposes -in the secondary recovery of oil should possess such physical and chemical characteristics as to keep the clay content of the producing sands in a permanently flocculated condition. Produced brines meet this requirement. Their use is recommended as a means of increasing intake rates of tight sands and oil recoveries, as a solution to brine-disposal prol;>lems, and as a means of conserving a natural resource.

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Response of a Gulf Coast Drilling Mud to Chemicals, Temperature and Heat-treatment

Cited by 2 publications

References 0 publications

Motion of Grain Boundaries: Experiments on Bicrystals

Motion of Grain Boundaries: Experiments on Bicrystals

Advantages of Brines in Secondary Recovery of Petroleum by Water-flooding

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