Geomechanics: a New Star in the Horizon to Change the Fortunes in E&P Projects

Mapping Intimacies ◽

10.2118/spe-169914-ms ◽

2014 ◽

Author(s):

M.. Hegazy ◽

M.R.. R. Lakshmikantha

Keyword(s):

Early Stage ◽

New Technology ◽

Wellbore Stability ◽

Sand Production ◽

Oil Companies ◽

Sealing Capacity ◽

Current State ◽

Production Behavior ◽

Integrated Project

Abstract The E&P industry all over the world is awakening to the new technology discipline of Geomechanics, recognizing its importance in every operation of hydrocarbons exploitation, from drilling to production. There are specific applications in the early stage of exploitation, e.g. with respect to wellbore stability, sand production, hydraulic fracturing, traversing depleted zones, characterization of fractures and fault sealing capacity. In the later stages of production it can better characterize reservoir subsidence and fracture behavior with pressure evolution. A rigorous application of these methods can add important value to E&P projects. The need for innovative ways to solve the technology challenges planted the seeds of Geomechanics to germinate and grow as a key technology in E&P industry with applications for present and future projects. The vision for the future of this emerging discipline is bright with strong growth in applications. It is especially relevant to meet the challenges posed by many new discoveries, especially unconventional plays, which are often difficult to develop profitably. Geomechanics creates opportunities for improved and integrated project management. It can offer a variety of solutions by integrating conventional E&P technologies with cutting edge numerical, mathematical models that impacts the reservoir production behavior. Major operators were the first to embrace the scientific use of Geomechanics to help develop difficult reservoirs profitably. Also, a few medium-sized oil companies have recognized this potential and, as a consequence, have created Geomechanics teams with in. In this article, the authors provide a bird's eye view of Geomechanics as a core E&P technology supporting mega E&P projects. We discuss the current state of the art of this technology, with special emphasis on applications.

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Characterization of RF Sputtered ZnO Piezoelectric Films Using Transmission Electron Microscope

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100114050 ◽

1975 ◽

Vol 33 ◽

pp. 86-87

Author(s):

Kemining W. Yeh ◽

Richard S. Muller ◽

Wei-Kuo Wu ◽

Jack Washburn

Keyword(s):

Integrated Circuit ◽

Acoustic Waves ◽

New Technology ◽

Surface Acoustic Waves ◽

Electromechanical Properties ◽

Leading Role ◽

Saw Devices ◽

Transmission Electron ◽

High Degree

Considerable and continuing interest has been shown in the thin film transducer fabrication for surface acoustic waves (SAW) in the past few years. Due to the high degree of miniaturization, compatibility with silicon integrated circuit technology, simplicity and ease of design, this new technology has played an important role in the design of new devices for communications and signal processing. Among the commonly used piezoelectric thin films, ZnO generally yields superior electromechanical properties and is expected to play a leading role in the development of SAW devices.

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Immunohistologic characterization of the early stage of HLA-B27 associated murine ankylosing enthesopathy

Immunology Letters ◽

10.1016/s0165-2478(97)88105-9 ◽

1997 ◽

Vol 56 (1-3) ◽

pp. 314

Author(s):

S Weinreich

Keyword(s):

Early Stage ◽

Hla B27

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Determinants of Export Oriented Entrepreneurs from Southeast Europe Region

Economic Themes ◽

10.2478/ethemes-2018-0025 ◽

2018 ◽

Vol 56 (4) ◽

pp. 439-452

Author(s):

Bojan Leković ◽

Miodrag Petrović ◽

Nemanja Berber

Keyword(s):

Early Stage ◽

New Technology ◽

Geographical Area ◽

Southeast Europe ◽

Social Phenomena ◽

East Europe ◽

Individual Level ◽

International Orientation ◽

Entrepreneurial Behaviour ◽

South East Europe

Abstract The subject of this research represents analysis of internationalisation activity of early-stage entrepreneurs in South East Europe region (SEE). The goal of this study is to determine characteristics of export oriented entrepreneurs from SEE region through the study of factors influencing international orientation. Geographical area of this research consists of countries from the South East Europe region. The research sample was formed on the basis of GEM - Global Individual Level Data, covering six countries (Slovenia, Croatia, Hungary, Romania, Bosnia and Herzegovina, and FYR of Macedonia), 12027 respondents of which 645 export-oriented entrepreneurs were identified. Collected data are processed using the software package for statistical analysis. With the help of Ordinal Logistic regression, significant influence of individual factors on the international orientation of entrepreneurs was identified. Research results showed that entrepreneurial motives, entrepreneurial KSA’s, innovation and new technology have a positive relationship with internationalization activity. One of the significant limitations of this paper is the lower Nagelkerk coefficient, which is characteristic for social phenomena. Bearing in mind the fact that this research trying to explain entrepreneurial behaviour, lower coefficients can be very meaningfull.

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Production behavior evaluation on multilayer commingled stress-sensitive carbonate gas reservoir

Energy Exploration & Exploitation ◽

10.1177/0144598720964155 ◽

2020 ◽

pp. 014459872096415

Author(s):

Jianlin Guo ◽

Fankun Meng ◽

Ailin Jia ◽

Shuo Dong ◽

Haijun Yan ◽

...

Keyword(s):

Early Stage ◽

Sedimentary Environment ◽

Production Performance ◽

Total Production ◽

Inversion Algorithm ◽

Gas Reservoir ◽

Hole Pressure ◽

Bottom Hole Pressure ◽

Bottom Hole ◽

Production Behavior

Influenced by the complex sedimentary environment, a well always penetrates multiple layers with different properties, which leads to the difficulty of analyzing the production behavior for each layer. Therefore, in this paper, a semi-analytical model to evaluate the production performance of each layer in a stress-sensitive multilayer carbonated gas reservoir is proposed. The flow of fluids in layers composed of matrix, fractures, and vugs can be described by triple-porosity/single permeability model, and the other layers could be characterized by single porosity media. The stress-sensitive exponents for different layers are determined by laboratory experiments and curve fitting, which are considered in pseudo-pressure and pseudo-time factor. Laplace transformation, Duhamel convolution, Stehfest inversion algorithm are used to solve the proposed model. Through the comparison with the classical solution, and the matching with real bottom-hole pressure data, the accuracy of the presented model is verified. A synthetic case which has two layers, where the first one is tight and the second one is full of fractures and vugs, is utilized to study the effects of stress-sensitive exponents, skin factors, formation radius and permeability for these two layers on production performance. The results demonstrate that the initial well production is mainly derived from high permeable layer, which causes that with the rise of formation permeability and radius, and the decrease of stress-sensitive exponents and skin factors, in the early stage, the bottom-hole pressure and the second layer production rate will increase. While the first layer contributes a lot to the total production in the later period, the well bottom-hole pressure is more influenced by the variation of formation and well condition parameters at the later stage. Compared with the second layer, the scales of formation permeability and skin factor for first layer have significant impacts on production behaviors.

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Exploring wall shear stress spatiotemporal heterogeneity in coronary arteries combining correlation-based analysis and complex networks with computational hemodynamics

Proceedings of the Institution of Mechanical Engineers Part H Journal of Engineering in Medicine ◽

10.1177/0954411920923253 ◽

2020 ◽

Vol 234 (11) ◽

pp. 1209-1222 ◽

Cited By ~ 2

Author(s):

Karol Calò ◽

Giuseppe De Nisco ◽

Diego Gallo ◽

Claudio Chiastra ◽

Ayla Hoogendoorn ◽

...

Keyword(s):

Shear Stress ◽

Wall Shear Stress ◽

Complex Networks ◽

Coronary Arteries ◽

Early Stage ◽

Flow Direction ◽

Computational Hemodynamics ◽

Time Histories ◽

Wall Shear

Atherosclerosis at the early stage in coronary arteries has been associated with low cycle-average wall shear stress magnitude. However, parallel to the identification of an established active role for low wall shear stress in the onset/progression of the atherosclerotic disease, a weak association between lesions localization and low/oscillatory wall shear stress has been observed. In the attempt to fully identify the wall shear stress phenotype triggering early atherosclerosis in coronary arteries, this exploratory study aims at enriching the characterization of wall shear stress emerging features combining correlation-based analysis and complex networks theory with computational hemodynamics. The final goal is the characterization of the spatiotemporal and topological heterogeneity of wall shear stress waveforms along the cardiac cycle. In detail, here time-histories of wall shear stress magnitude and wall shear stress projection along the main flow direction and orthogonal to it (a measure of wall shear stress multidirectionality) are analyzed in a representative dataset of 10 left anterior descending pig coronary artery computational hemodynamics models. Among the main findings, we report that the proposed analysis quantitatively demonstrates that the model-specific inlet flow-rate shapes wall shear stress time-histories. Moreover, it emerges that a combined effect of low wall shear stress magnitude and of the shape of the wall shear stress–based descriptors time-histories could trigger atherosclerosis at its earliest stage. The findings of this work suggest for new experiments to provide a clearer determination of the wall shear stress phenotype which is at the basis of the so-called arterial hemodynamic risk hypothesis in coronary arteries.

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Characterization of Beldi chicken and turkeys in rural poultry flocks of Morocco. Current state and future outlook

Animal Genetic Resources Information ◽

10.1017/s1014233900001516 ◽

2001 ◽

Vol 31 ◽

pp. 87-95 ◽

Cited By ~ 7

Author(s):

K. Benabdeljelil ◽

T. Arfaoui

Keyword(s):

Rural Areas ◽

Sexual Maturity ◽

Phenotypic Variability ◽

Future Outlook ◽

Current State ◽

Production Improvement ◽

Rural Poultry

SummaryThe main characteristics of Beldi (meaning “native” in Arabic) poultry raised in rural areas were studied in the Khenifra Region through extensive surveys.Beldi chickens have large phenotypic variability. Black, brown, grey and white colours, pure or mixed, are frequently observed in chickens' featherings while turkeys are predominantly bronze. Plumage types were fairly homogeneous in both species. Single combs and dented combs were respectively predominant in chicken hens and roosters.Sexual maturity was reached at 154 days for roosters, 168 for hens in chicken, around 217 days for toms and 231 for turkey hens. The age at first egg averaged 5.8 months for hens and 8.4 months for turkey hens. The number of eggs laid per hen per year was 78 for chicken and 69 for turkey. Hatchability rate was 78 and 80 percent for chicken and turkeys, respectively. Diseases were the main cause of mortality, which could affect up to 77 percent of chicken flocks.Few preliminary urgent steps for the conservation of Beldi poultry are discussed with other production improvement proposals.

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