Reservoirs Document

BCGS reservoirs documented in the literature may either be single, isolated sand accumulations or vertically stacked sands that are several thousands of feet thick (Law 1984a,b, 1985, 1995). These reservoirs are most often composed of a sandstone lithology and are Cretaceous age or older (Masters 1979, 1984, 2000). Note that the absence of any documented carbonate BCGS reservoirs probably does not preclude their existence. 

The data from Miletree Run Reservoir document the presence of nearly a century of input of atmospherically transmitted coal-combustion products. In contrast to the situation at Hinkel Reservoir, we cannot identify a nearby (<25 km) anthropogenic source for this material. The likely sources are bituminous coal-fired power plants located approximately 50 km to the south and 60-70 km to the west of the site, with the sites to the west being on-average upwind from the study area. 

Correlations on paper panels are made easier if a type log has been creafed of a fypical and complete sequence of the area. If this log is available as a transparency, it can be easily compared against the underlying paper copy. Type logs are also handy if the reservoir development has to be documented in reports or presentations. 

PVA Particles. Dispersions were prepared in order to examine stabilization for a core polymer having a glass transition temperature below the dispersion polymerization temperature. PVA particles prepared with a block copolymer having M PS) x 10000 showed a tendency to flocculate at ambient temperature during redispersion cycles to remove excess block copolymer, particularly if the dispersion polymerization had not proceeded to 100 conversion of monomer. It is well documented that on mixing solutions of polystyrene and poly(vinyl acetate) homopolymers phase separation tends to occur (10,11), and solubility studies (12) of PS in n-heptane suggest that PS blocks with Mn(PS) 10000 will be close to dissolution when dispersion polymerizations are performed at 3 +3 K. Consequently, we may postulate that for soft polymer particles the block copolymer is rejected from the particle because of an incompatibility effect and is adsorbed at the particle surface. If the block copolymer desorbs from the particle surface, then particle agglomeration will occur unless rapid adsorption of other copolymer molecules occurs from a reservoir of excess block copolymer. 

It is a viral hemorrhagic fever normally found in Africa. The natural reservoir is unknown. Other than humans, the disease has only been documented in primates, with a similar clinical picture. This is a biosafety level 4 agent. 

In principle, the recovery of LNAPL is similar in mechanical operation to production of a low-pressure, water-driven reservoir. Almost all documented petroleum remediations have been characterized by subsurface conditions under water table conditions (i.e., the top surface of the fluids are at atmospheric pressure). Few cases of confined aquifer situations have been reported in the literature, and although the mechanical recovery procedures are slightly different, the economic considerations are similar. 

Document that the reservoir conforms to purchase specification and invoice. Verify and document that the vessel meets or exceeds the pressure rating (vacuum) specified in the purchase specifications. Perform vacuum hold tests on the tank and document. Acceptance ID tests will vary with the size of the system. A positive pressure test is often done in order to find leaks. Perform and document cleaning procedures used prior to placing the vessel in service. This completes the normal testing done on the tank prior to joining it to the vacuum system. 

The 8 UGS candidates were chosen among other oil and gas fields because these sites (with some variation) are well documented (e.g. 2D seismic surveys and a number of wells) and the reservoirs has a proven seal, which has been able to withhold a gas overpressure for million of years. This is important both for safety reasons and for operating the gas storage without risks of gas leaking away in the substrata. 

The biodegradation of crude oils in their reservoirs is well documented (M, 22). It occurs in the presence of meteoric water which supplies dissolved oxygen and nutrients including phosphate and fixed nitrogen. Microenvironments may exist in which aerobic and anaerobic activities occur in close proximity so that intermediates of aerobic metabolism may become substrates for anaerobic bacteria. In reservoirs, microbes are most active at the oil-water interface and at temperatures between about 20° and 60 to 75°C. 

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