Mobil

About: Mobil is a based out in . It is known for research contribution in the topics: Catalysis & Zeolite. The organization has 7085 authors who have published 10642 publications receiving 237497 citations. The organization is also known as: Socony-Vacuum Oil Company & Standard Oil Company of New York.

Catalytic dewaxing process

Abstract: Hydrocarbon feedstocks such as distillate fuel oils and gas oils are dewaxed by isomerizing the waxy components over a zeolite beta catalyst. The process may be carried out in the presence or absence of added hydrogen. Preferred catalysts have a zeolite silica:alumina ratio over 100:1.

Model for the combined-flow origin of hummocky cross-stratification

Abstract: Many shallow marine sandstones are characterized by gently dipping trough cross-stratification. There appear to be significant similarities between this low-angle cross-stratification and typical hummocky cross-stratification, and it is proposed that much of what is currently recognized as hummocky cross-stratification is related to low-relief megaripple bed forms that are equilibrium structures for fine-grained sand under combined wave surge and unidirectional currents. The geometry that obtains when these bed forms migrate is low-angle trough cross-stratification. High rates of sedimentation from incipient suspension and limited lateral migration of individual bed forms promote preservation of convex-upward depositional surfaces (hummocks) between troughs. Highly unsteady flow leads to abundant internal scour and drape surfaces. Neither random scour and drape nor oscillatory currents seem sufficient to generate hummocky bed forms.

Method of recovering hydrocarbons from oil shale

Abstract: A method is described for recovering hydrocarbons from an oil-shale formation by in situ retorting A well penetrating the formation is heated and gas is injected until a pressure buildup within the well is reached, due to a decrease in the conductivity of naturally occurring fissures within the formation The well is then vented, in order to produce spalling of the walls This results in the formation of an enlarged cavity containing rubberized oil shale A hot gas then is passed through the rubberized oil shale in order to retort hydrocarbons and these hydrocarbons are recovered from the well (11 claims)

Models for generation of carbonate cycles

Abstract: Computer modeling provides a quantitative approach to a better understanding of actual carbonate cyclic sequences. To model carbonate cycles, the authors can use water-depth-dependent sedimentation rate for each facies, an initial lag time, linear subsidence, tidal range, and period and amplitude of sea-level oscillation about a horizontal datum. Tidal-flat-capped cycles up to a few meters thick result from low-amplitude sea-level oscillation of a few meters and short lag times. Nonerosive caps reflect sea-level lowering being balanced by subsidence, and basinward migration of the shoreline not exceeding tidal-flat progradation rate. When higher amplitude sea-level oscillations occur, the tidal flats are abandoned on the inner shelf during sea-level fall, because seaward movement of the strandline outpaces progradation rate of flats. Increased amplitude also results in sea-level falling faster than flats can subside, so that disconformities with thick vadose profiles develop. High-amplitude (100 m or more) oscillations result in incipient drowning of platforms and juxtaposition of deep-water facies against shallow-water facies within cycles. Sea level falls before the platform can build to the sea-level highstand, and the shoreline migrates much more rapidly than tidal flats can prograde; thus, cycles are disconformity-bounded and lack tidal-flat caps. 10 references.

A New Geochemical-Sequence Stratigraphic Model for the Mahakam Delta and Makassar Slope, Kalimantan, Indonesia

Abstract: The generally accepted geochemical-stratigraphic model for the Mahakam-Makassar area downgrades the potential for commercial deep-water hydrocarbon accumulations on the outer shelf, yet fails to explain recent discoveries in this area. According to this model, effective middle Miocene coaly source rocks are restricted to updip shelfal areas, whereas age-equivalent rocks on the outer shelf are thermally postmature for generating oil and buried too deeply to preserve good reservoir quality. Our revised geochemical-stratigraphic model upgrades the potential of the outer shelf and directly influenced recent oil and gas condensate discoveries in this area. The middle Miocene source rock interval is not buried as deeply as was previously believed and is now within the oil window based on our regional seismic reinterpretation and source-specific kerogen kinetics. Genetically distinct petroleum accumulations are charged from local kitchens between anticlinal structural trends aligned parallel to the coastline. High-resolution geochemistry confirms that crude oil samples from these different trends (e.g., Handil-Nilam-Badak, Bekapai-Tunu-Attaka, Perintis-Sisi-Ragat) are genetically distinct. Two major (1, 2) and two minor (3, 4) petroleum systems dominated by terrigenous type III organic matter are recognized. The highstand, lowstand 1, lowstand 2, and transgressive systems tract oils account for about 46, 31, 15, and 8%, respectively, of the 61 oil samples and about 45, 32, 11, and 12%, respectively, of the estimated ultimate recoverable reserves from the fields represented by these samples. These fields account for about 13 of the 16 BBOE (billion bbl of oil equivalent) estimated ultimate recoverable reserves in the entire Kutei basin. (1) Waxy highstand oils (e.g., Handil, Nilam) occur mainly onshore in middle Miocene-Pliocene reservoirs. These oils originated from middle-upper Miocene coal and shale source rocks deposited in coastal-plain highstand kitchens now near the peak of the oil window. (2) Less waxy lowstand 1 oils (e.g., Perintis, Sisi, Ragat) occur offshore in middle-upper Miocene reservoirs. These oils originated from middle-upper Miocene coaly source rocks deposited in deep-water lowstand kitchens now mostly in the early oil window. (3) Lowstand 2 oils (e.g., Semberah 037) are similar to the lowstand 1 oils but occur mainly onshore in lower-middle Miocene reservoirs. These oils generally are more mature than lowstand 1 oils and originated from lower-middle Miocene coaly source rocks. (4) Nonwaxy transgressive oils (e.g., Badak) occur mainly onshore in middle-upper Miocene reservoirs. These oils were generated at low thermal maturity from middle Miocene suboxic marine shales deposited near maximum flooding surfaces. Our three-dimensional geochemical-stratigraphic models for highstand and lowstand source rocks indicate that less fractional conversion of the kerogen occurred than had been predicted by the generally accepted stratigraphic model and classic type III kerogen kinetics; furthermore, two-dimensional fluid flow modeling supports independent geochemical evidence for commingling of oils in the Tunu field from highstand and lowstand kitchens to west and east, respectively. Finally, our model successfully predicted that oil and gas, rather than gas only, End page 12---------------- would be discovered at the recently drilled deep-water Merah Besar and West Seno fields. Geochemical analyses of oils from the Merah Besar field confirm that they belong in the lowstand 1 oil group.