20 research outputs found
A cognitive methodology to improve EOR/IOR choice process: from applied approaches to more generic ones
No full textNumerical Evaluation of the Combined Effect of Wettability and Heterogeneity on Waterflood Performance
No full textWater Shutoff by Relative Permeability Modifiers: Lessons from Several Field Applications
No full textApplication of the DDFN (Discrete and Deformable Fracture Network) Method Within an Integrated Unconventional Reservoir Study Workflow
No full textFlow modelling of unconventional shale reservoirs using a DFM-MINC proximity function
No full textInternational audienceDue to their initial low permeability, unconventional plays can be economical only through hydraulic fracturing. This process, in order to be controlled needs to rely on a solid representation of the natural fracture geometry, an accurate stimulation model which considers the interaction with natural lineaments, and a physical reservoir model which can account for the different flow regimes occurring during production. The stimulated volume drainage can be evaluated using either Decline Curves Analysis/Rate Transient Analysis (DCA/RTA) techniques or reservoir simulation. In both cases, the geometry of the final Discrete Fracture Network (DFN) issued from the natural characterization and the stimulation, is very important, and for practical purposes is either overly idealized (Warren & Root approach) or oversimplified (Bi-wing). The models have shown their limitations when confronted with measurements in the field, opening up ways to use DFN geometries within integrated reservoir studies.The present work addresses some of the issues above, developing a hierarchical Discrete Fracture Model (DFM) based on the “filtering” of a stimulated DFN, realistically obtained by the characterization step and the stimulation process. This leads to a triple-continuum representation, consisting of: (1) the matrix media, (2) a high conductive stimulated fracture network and (3) a low conductive stimulated fracture network.The method consists in homogenizing low conductive networks, keeping a user defined backbone of high conductive fractures as the main “reservoir” DFN. One of the main advantages of this DFM relies on the way we compute the well-known Multiple Interacting Continua (MINC) approach, using a “proximity function” formalism, able to simulate transient effects. Using practical examples, this paper demonstrates applicability capacities of this method, enabling the integration of more complex geometries within a “quick” simulation framework
Long-Term Risks and Short-Term Regulations: Modeling the Transition from Enhanced Oil Recovery to Geologic Carbon Sequestration
No full textRecent policy debates suggest that geologic carbon sequestration (GS) likely will play an important role in a carbon-constrained future. As GS evolves from the analogous technologies and practices of enhanced oil recovery (EOR) operations to a long-term, dedicated emissions mitigation option, regulations must evolve simultaneously to manage the risks associated with underground migration and surface tresspass of carbon dioxide (CO2). In this paper, we develop a basic engineering-economic model of four illustrative strategies available to a sophisticated site operator to better understand key deployment pathways in the transition from EOR to GS operations. All of these strategies focus on whether or not a sophisticated site operator would store CO2 in a geologic formation. We evaluate these strategies based on illustrative scenarios of (a) oil and CO2 prices; (b) leakage estimates; and (c) transportation, injection, and monitoring costs, as obtained from our understanding of the literature. Major results reveal that CO2 storage in depleted hydrocarbon reservoirs after oil recovery is associated with the greatest net revenues (i.e., the “most-preferred” strategy) under a range of scenarios. This finding ultimately suggests that GS regulatory design should anticipate the use of the potentially leakiest, or “worst,” sites first.carbon sequestration, enhanced oil recovery, leakage, regulatory design, risk management
Unconventional Production Forecast Needs Integration of Field Hydraulic Stimulation Data Through Fracture Model Calibration and Optimized Numerical Scheme
No full textThe left-wing road to fascism : an investigation of the influence of 'socialist' ideas upon the political ideology of the British Union of Fascists.
No full textThe primary conclusion drawn by the thesis is that the political ideology of the BUF clearly exhibited a left-wing strand which is described as the BUF's brand of fascist
'socialism'. This strand (whilst a travestic and heretical form of socialism) considered the BUF to be more radical and virile than the Labour movement and, alone amongst political movements, capable of bringing about a national revolution which would contain a socio-economic reorientation of the country along classic socialist lines - an end to poverty, the building of houses and job creation - with Trade Unions taking a central role, within the framework of the Corporate State, in the industrial decision making process. It is not suggested that this strand was a self-contained concept within the BUF. The thesis has simply taken the heuristic step of grouping together these ideas in order to highlight
the presence of an identifiable strand within the BUF's political ideology. The thesis supports the school of academic thought which believes that fascism must be taken seriously as a genuine political ideology if it is to be understood. Fascism is viewed as an eclectic political
ideology containing a clear potential (although one not
necessarily realised) to exhibit a strand of thought which was at base a fascistic revision of socialism. In
regards to the methodology adopted by the thesis, the generic theories of fascism devised by Griffin, Sternhell, Eatwell and Payne, it was concluded that in tile context of this thesis all proved capable of predicting the potential
inherent in fascist ideology to grow from left-wing roots and exhibit a brand of fascist 'socialism'. In terms
of the theories' use as research tools it is Griffin's which stands out, due to its combination of profundity and
lucidity, which gives his theory an operational simplicity,
flexibility and heuristic quality
Tehnici de comunicare şi PR politic în Şcoala lui Dimitrie Gusti. Carol al II-lea, „regele ţăranilor şi al tineretului”: Political PR and Communication Techniques within The School of Dimitrie Gusti. King Karl II, “The King of the Peasants and of the Youth”
No full textWhen the common belief was that „everything had been said” about the Sociological School of Dimitrie Gusi (1925-1940), researcher Zoltán Rostás released his research project regarding Gusti’s School. The Monographic School was disclosed in a totally different manner from the perspective of the oral history. This study is based on the life history interviews conducted by Rostás on the Gusti’s School members in the ’80s. To answer the question to which extent did a coherent or spontaneous political communication strategy exist in the interwar period, coordinated by the sociologists hired at the Royal Foundation in the favor of King Karl II, the author also studied the press articles of those times. By using the method of representative biography, the article unveils if and how the members of Gusti’s School used the PR and communication techniques that Gusti had encountered in Germany with the purpose to build an image of a Social Monarch for King Karl II’s. The article describes the rupture produced in the mid ’30s between the group formed around Rânduiala magazine (Ernest Bernea, D. C. Amzăr) and the sociologists who remained faithful to Dimitrie Gusti at the Cultural Royal Foundation (Octavian Neamţu, Henri H. Stahl, Anton Golopenţia). The two fractions applied a series of communication techniques to build the profile of a „Savior” of the nation in the press back then. The supporters of Rânduiala built it for the Captain of the Legionary Movement, Corneliu Zelea Codreanu, and the monographists – for King Karl II
