Abstract: A method is provided for transferring spectral information, comprising spectral images, from a source spectrometer to a target spectrometer in order that chemometric models can be transferred among spectrometers.

Abstract: Oil shale is well mixed and efficiently, effectively, and economically retorted in a special gravity flow retorting process and system which utilizes novel arrangements of internal baffles in a static mixer.

Abstract: Oil shale is well mixed and efficiently, effectively, and economically retorted in a special gravity flow retorting process and system which utilizes novel arrangements of internal baffles in a static mixer.

Abstract: Oil shale is well mixed and efficiently, effectively, and economically retorted in a special gravity flow retorting process and system which utilizes novel arrangements of internal baffles in a static mixer.

Abstract: A flame front is ignited and passed through an underground oil shale retort to produce shale oil. The flame front is supported by a specially blended feed gas consisting essentially of air, steam and retort off gases. Product yield and quality are increased by varying the volumetric ratio of air, steam and retort off gases in the feed gas during retorting in proportion to the oil yield, or the relative richness, leanness and kerogen content of the oil shale being heated by the flame front, or in proportion to the amount of carbon residue on the retorted shale being combusted.

Abstract: A process is provided for forming an in situ oil shale retort which minimizes channeling, explosion gas turbulence and flame front tilting. In the process, explosives are detonated in an underground formation of oil shale to blast the oil shale into a permeable rubblized mass defining a retort, and gases emitted from the explosion are symmetrically vented. In the preferred form, the gases are vented through vertical vent holes and blast holes which extend through the top of the retort, as well as through a lateral access tunnel which extends into the bottom of the retort.

Abstract: Disclosed is a method for providing communication with a subterranean oil shale retort. This method can be used to provide a means of introducing fluids, such as a slurry of spent oil shale in water, into a retort. The method for providing lateral communication with a subterranean oil shale retort containing a rubblized retortable mass of oil shale, said retort being substantially surrounded by a mass of unmined formation comprises drilling at least one hole through the unmined formation adjacent to the retort; and providing communication between at least one of said holes and an adjacent retort; so that said drill hole can be used to communicate fluids to said retort. Fluids can be introduced into a spent retort which will form a supporting structure within said retort.