There are large, heavy oil reserves in Block X of the Xinjiang oilfields, China. Due to its large burial depth (1300 m) and low permeability (26.0 mD), traditional steam-injection technology cannot be used obtain effective development benefits. This paper conducts experimental simulation research on feasibility mechanism CO2-energized fracturing horizontal wells N2 foam huff-n-puff deep reservo...

The recovery ratio is an important indicator to evaluate the effectiveness and performance of oilfield development. In order clarify key factors in stage super-high water cut, 9 dynamic indicators 12 blocks are analyzed heavy oil reservoir eastern China application engineering principles statistical analysis methods. results show that four well density, producing wells injecting wells, net cumu...

Strong foam can be generated in porous media containing oil, resulting in incremental oil recovery; however, oil recovery factor is restricted. A large fraction of oil recovered by foam flooding forms an oil-in-water emulsion, so that costly methods may need to be used to separate the oil. Moreover, strong foam could create a large pressure gradient, which may cause fractures in the reservoir. ...

The ultimate aim of any oil recovery operation at sea is to collect as much floating oil as is reasonably and economically possible. However, a review of past spills shows that rarely is more than 10% of spilled oil recovered from the sea surface. Although many methods of mechanical containment and recovery exist, each has its own limitations which affect the overall success of a recovery opera...

The major sources of heavy metal pollution in Estonia are oil shale industry and oil shale combustion. There is an utmost need to monitorsoil pollution with heavy metals in this region. Earthworms are good accumulators of heavy metals and can be used as bioindicators. Endogeic species Aporrectodea caliginosa and Aporrectodea rosea as well as anecic species Lumbricus terrestris are good bioindic...

ABSTRACT: Aqueous enzymatic extraction of oil from pistacia khinjuk was performed using cellulase. The central composite design was used to optimize the parameters that are significant to the process. The influence of three regressors on the percentage of oil recovery from seed was evaluated using second-order polynomial multiple regression model. Analysis of variance showed a high coefficient ...

In this paper, the potentials of using particles, especially nanoparticles, in enhanced oil recovery is investigated. The effect of different nanoparticles on wettability alteration, which is an important method to increase oil recovery from oil-wet reservoirs, is reviewed. The effect of different kinds of particles, namely solid inorganic particles, hydrophilic or hydrophobic nanoparticles, an...

The present feature describes for the first time the application of spores from Aspergillus sp. IMPMS7 to break out crude oil-in-water emulsions (O/W). The fungal spores were isolated from marine sediments polluted with petroleum hydrocarbons. The spores exhibited the ability to destabilize different O/W emulsions prepared with medium, heavy or extra-heavy Mexican crude oils with specific gravi...