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Copyright of Boletin de Geologia is the property of Universidad Industrial de Santander and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Introduction: Diesel oil-based drilling fluids (OBM), while expensive, are highly advantageous for drilling in geological complexities. However, the high hydrocarbon content turns its residues (drilling cuts) into a pollutant with great difficulty for its treatment and final disposal. Objective: To evaluate the drilling waste contaminated with diesel potential for its reuse in cement industry to clinker manufacture as a final disposal alternative. Materials and Methods: In the drilling cuts evaluation as raw material for cement clinker conformation, they were characterized in terms of content of total hydrocarbons, fat and oils, aromatic hydrocarbons, caloric power and flash point. Industrial-type tests were carried out with different mixing ratios between dry cutting and wet cutting with marl and Ferritic soil. Results and Discussion: It was show that with Ferritic soil and dry cutting mixture a lower aromatic fraction content is obtained, which does not affect the clinker quality. Conclusions: Obtained results showed that it is technically feasible, economically sustainable and environmentally friendly; given by cuts contaminated with diesel, generated during oil drilling reuse, and its energy use in cement clinker manufacture. [ABSTRACT FROM AUTHOR]

The recovery of ecosystems contaminated with hydrocarbons using microorganisms offers a practical and viable solution. The objective of the research work was to evaluate the degradation capacity of a bacterial consortium, composed of four strains (Pseudomonas sp. B10, Alcaligenes sp. F10S1, Bacillus sp. F9S and Bacillus sp. RFA) isolated from coastal areas of Cuba. A microcosm test was designed using crude oil and petroleum derivatives (kerosene, diesel, gasoline, Jet A1) as carbon sources. The cultures were incubated with shaking at 130 rpm and a temperature of 300 C for 90 days. During the trial, the viability of the consortium was evaluated at 0, 21, 45 and 90 days by counting on plates of cultivable aerobic bacteria (CFU/mL). The Infrared Spectroscopy (IR) technique for crude oil, diesel, kerosene and Jet A1, Gas Chromatography was used for gasoline and Total Hydrocarbons (HCT) determined the degradation efficiency of the consortium for diesel, kerosene and Jet A1. The saturated, aromatic, resin and asphaltenes (SARA) components of crude oil were determined at the beginning and end of the trial by the EPA, 2020 procedures. The consortium remained viable in cultivation with crude oil and derivatives, indicating that was able to use these compounds as a source of carbon and energy. The consortium was able to partially degrade the components of crude oil: saturated (38.46%), resins (89.5%) and asphalt (19.42 %), it also degraded diesel hydrocarbons (14.22 %), Kerosene (41.69 %) and Jet A1 (59.68 %), transformed the gasoline with the greatest influence on olefins (100 %) and paraffin (66.37 %). The consortium proved to be efficient in the degradation of crude oil and different petroleum derivatives, its application in bioaugmentation processes can be a viable alternative for the sanitation of ecosystems impacted by oil. [ABSTRACT FROM AUTHOR]

Copyright of Boletin de Geologia is the property of Universidad Industrial de Santander and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

The provinces of Holguin and Las Tunas have potential gas and oil resources which have not yet been fully discovered. Therefore, an assessment is completed to identify potential areas for hydrocarbon prospection based on the geological and geomorphological methods and supported by geophysical methods. Numerous proofs of the existence of oils in the surface and gas being reported in the petroleum wells are sufficient elements to think that there is an active petroleum system in the area. The analysis is supported by information given on the geological surface maps on scale of 1:100 000, satellite and radar images, information of surface occurrence of hydrocarbons, drilled wells and recent field work and geophysical interpretation results. The main results include the identification of two areas for petroleum exploration: the Maniabón-La Farola is identified as the most potential area and the second one is to the north of the Picanes well 1x. Neotectonic processes are identified to have a strong influence on the first area, which allowed delimitating petroleum system elements through geological and geomorphological methods. [ABSTRACT FROM AUTHOR]

The bay of Santiago from Cuba has been object of numerous investigations, where the contamination is approached by hydrocarbons, but it is not reported the level of contamination of the same one quantitatively. For what the objective of this research is to evaluate the concentration of hydrocarbons in samples of water of the bay of Santiago de Cuba starting from its chemical determination for the method of Partition Gravimeter. Several samplings were made, in two stages, the first one in the months of April and May of 2013. The second stage in March and April of 2014. The seawater was studied in nine stations of the bay and two effluents of identified sources as pollutants. Being that, the level of contamination is high for all the stations and the values of concentration of total hydrocarbons, fats and oils don't fulfill that settled down in the Cuban Norms. [ABSTRACT FROM AUTHOR]

The presence of hydrocarbons in the State Farm Los Clavelitos has a negative impact on the environment. For that reason, the elements contributing to this effect are identified and evaluated by applying the Buroz Integrated Relevant Criteria method. It was demonstrated that the presence of hydrocarbons in the state farm is owed to natural emissions known as Menes. The elements that are affected in the physical environment are the soil, the water and the air and in the biological environment are the flora and fauna. Lab test works were performed which included testing samples of water and soil. The test results showed that most of the parameters tested were within the permissible limits established by the Venezuelan regulations. According to the method applied, the most impacted components were those of the physical environment in the air factor with an environmental impact value of 5,7 with a moderate probability of occurrence while the environmental impact value for the biological environment in the fauna factor was 6,2 with a high probability of occurrence. Finally, it is proposed to implement a group of corrective and remediating measures taking into account the impacts identified. [ABSTRACT FROM AUTHOR]