bluuebunny/crossref_metadata_2025_split huggingface dataset:
Combination of Horizontal Wells and Alkaline/Surfactant/Polymer Flooding: A Solution to Produce Hard-to-Recover Residual Oil in Polymer-Flooded Reservoirs
Authors: Yin Shize 
Published: April 2018

Abstract
The method described in this paper solves the difficult problem of establishing lateral accretion interlayer geologic model. The distribution of oil formed by lateral accretion interlayer barrier after direct well flooding is studied by using CMG numerical simulation software; and with the maximum sweep coefficient as the target, this research optimizes the design of the horizontal injection-production well, which is perpendicular to lateral accretion interlayer, and the well distance is 150m. The well trajectory is from the horizontal section of the injection well to the top of the oil layer, which is 1/5 of the oil reservoir thickness. The horizontal section of the production well to the top of the oil layer is 1/3 of the reservoir thickness. Realize the linear displacement lateral accretion interlayer barrier forms the residual oil. Through numerical simulation, the optimal injection scheme is to use 25 million molecular weight polymers; the injection mode is: 0.075PV precursor polymer slug (1800 mg/L) +0.3PV ternary main slug (2000mg/L polymer +1.2wt% alkali +0.3wt% surfactant) + 0.15PV ternary slug (2000mg/L polymer +1.0wt% alkali +0.2wt% surfactant) +0.20PV subsequent polymer slug (1400mg/L), the injection rate was 0.18pv/a. After the plan was implemented in mine 2015, the single well's output was 25.36 t/d, and the water content was 74.32%, decreased by 21.68%. The effect was remarkable. The estimated recovery rate on the basis of numerical simulation and tracking fitting is 73.05%, which is 5.95% higher than that of vertical well ASP flooding, and 4.01% higher than that of vertical well injection and horizontal well.
Uncertainty Quantification of Gas Production in the Barnett Shale Using Time Series Analysis
Authors: Joshi K. G. , Awoleke Obadare O. , Mohabbat Ahmadi 
Published: April 2018

Abstract
This paper presents a methodology for quantifying uncertainty in production forecasts using Logistic Growth Analysis (LGA) and time series modeling. The applicability of the proposed method is tested by history matching production data and providing uncertainty bounds for forecasts from eight Barnett Shale counties.
In the methodology presented, the trend in the production data was determined using two different non-linear regression schemes. Predicted trends were subtracted from the actual production data to generate two sets of stationary residual time series. Time series analysis techniques (Auto Regressive Moving Average models) were thereafter used to model and forecast residuals. These residual forecasts were incorporated with trend forecasts to generate our final 80% CI.
To check reliability of the proposed method, we tested it on 100 gas wells with at least 100 months of available production history. The CIs generated covered true production 84% and 92% of the time when 40 and 60 months of production data were used for history matching respectively. An auto-regressive model of lag 1 was found to best fit residual time series in each case.
The proposed methodology is an efficient way to generate production forecasts and to reliably estimate the uncertainty. The method is computationally inexpensive and easy to implement. The utility of the procedure presented is not limited to gas wells and can be applied to any type of well or group of related wells.
Systematic Root-Cause Analysis of Three Major Offshore Oil and Gas Drilling Accidents Using the AcciMap Methodology
Authors: Tabibzadeh Maryam , Jain Aman 
Published: April 2018

Abstract
The investigation of different accidents in offshore oil and gas drilling industry indicates inadequate management systems and miscommunication as one of the major contributing factors leading to these accidents. In this paper, we will identify the common contributing factors of three major offshore oil and gas drilling accidents in the period of 2009 to 2013 using the structure of the AcciMap methodology, as a risk management and accident investigation framework that was developed by Rasmussen in 1997. This methodology analyzes the contribution of different socio-technical factors and involved key players in an accident through its hierarchical structure. This provides a broader perspective to investigate accidents and identify their common contributing factors.
The two analyzed accidents in this paper are the Hercules 265 Jack-up Rig Blowout in 2013 and the Montara Oil Spill in 2009 using the structure of the AcciMap framework. The results of this analysis will then be compared with the already developed AcciMap framework by Tabibzadeh and Meshkati (2015) for the BP Deepwater Horizon blowout to find the similarities among these accidents. One of the important findings about these accidents is the fact that they did not occur as the act of individuals (we cannot blame front-line operators), but rather due to highly responsive and combined processes, which involve decisions of several layers of key players. In this chain, companies and their policies affect their management's plans and decisions. These decisions are passed on to lower levels and impact personnel's (crew's) actions, which eventually along with existing processes and conditions could lead to disasterous accidents. In addition, government and regulatory agencies as well as industry codes, standards and best practices, as external factors, play a role in contributing to accidents.
Moreover, the analysis of the comparison of the three aforementioned accidents shows that how lack of proper, standard well control procedures and guidelines or lack of knowledge about them when combined with ineffective communication and interoperability can prove to be deadly and harmful in different ways. It causes loss of life, property and revenue. In addition, it endangers the environment, which is already suffereing due to other human activities.
Falloff Testing Under Multiphase Flow Conditions in Naturally Fractured Reservoirs
Authors: Dastan A. , Kamal M. M. , Hwang Y. , Suleen F. , Morsy S. 
Published: April 2018

Abstract
Naturally fractured reservoirs constitute a significant portion of oil and gas fields worldwide. Like all reservoirs, waterflooding is routinely used in naturally fractured formations to increase recovery. However, the benefits of waterflooding can be limited due to early water breakthrough via the fractures. Therefore it is imperative to closely monitor the flood progress in these reservoirs. Analyzing transient tests in water injection wells, especially early in the life of the flood can provide valuable information, such as the mobilities in various regions around the well and the location of the flood front. An analytical model to design and analyze falloff transient data in naturally fractured reservoirs is highly desirable so that pressure transient analysis techniques can be applied for monitoring and optimizing secondary recovery projects.
In this paper we present a semi-analytical solution for the pressure response during falloff tests in naturally fractured reservoirs under multiphase flow conditions. We consider water injection into an oil reservoir, resulting in two-phase flow. In our model, the radial variation of fluid saturation is modeled as a multibank reservoir with constant saturation in each bank. Each bank has a different relative permeability and compressibility value, corresponding to the fluid saturation in the bank. We model naturally fractured reservoir behavior using Warren & Root's dual porosity model, which is extended to accommodate two-phase and multi-composite reservoirs. We also include capillary pressure effects in the model.
The proposed semi-analytical solution was tested and compared against numerical simulation results obtained from commercial simulators. The results have been in excellent agreement, validating our semi analytical approach. Using the proposed solution provides a rigorous and fast method to design and analyze tests. It also allows for using nonlinear regression techniques as opposed to computationally expensive trial and error matching for estimation of reservoir properties. Our analytical model can also be used as a guideline for grid refining in the vicinity of the wellbore and time-step selection in numerical simulators for transient tests analysis.
We expect our analytical method will enable operators and engineers to design and analyze falloff tests quickly and accurately in naturally fractured reservoirs.
Composites of ZnO nanoparticles and biomass based activated carbon: adsorption, photocatalytic and antibacterial capacities
Authors: Cruz G. J. F. , Gómez M. M. , Solis J. L. , Rimaycuna J. , Solis R. L. , Cruz J. F. , Rathnayake B. , Keiski R. L. 
Published: April 2018

AbstractComposite material (AC-ZnO) was prepared by growing ZnO nanoparticles during the production of biomass based-activated carbon (AC) via the incorporation of zinc acetate in the process. Comprehensive analyses confirmed the presence of ZnO nanoparticles over the AC surface and described the particular nature of the composite adsorbent. Methylene blue (MB) equilibrium data fitted the Dubinin-Radushkevich model. The MB adsorption capacity was higher for the bare activated carbons (197.9–188.7 mg/g) than the activated carbons with ZnO nanoparticles (137.6–149.7 mg/g). The adsorption of the MB on the adsorbents is physical because the mean adsorption energy (E) is between 1.76 and 2.00 kJ/mol. Experiments that combine adsorption and photocatalysis were carried out with different loads of adsorbents and with and without UV-light exposure. Photocatalytic activity was identified mostly at the first stage of the adsorption process and, in the case of experiments with less load of the composite AC-ZnO, because the light obstruction effect of the activated carbon is more for higher loads. The ZnO grown over AC improves the adsorption of cations such as Pb, Al and Fe in aqueous phase (polluted river water) and provides antibacterial capacity against Escherichia coli and Salmonella typhimurium.
Contamination by Coal Dust in the Neighborhood of the Tarragona Harbor (Catalonia, Spain): A Preliminary Study
Authors: Rovira Joaquim , Schuhmacher Marta , Nadal Martí , Domingo José L. 
Published: April 2018

Background:
In February 2017, some buildings of La Pineda (Catalonia, NE Spain) a rather small town, located near to the Tarragona harbor, were affected by a contamination episode that dirtied external walls, windows, doors and floors of these buildings with a black dust. This study was aimed at assessing the origin of the black dust appeared in the buildings.

Methods:
Black dust samples were collected in the railings of balconies, windows, and exterior doors of two buildings in La Pineda, as well as in the ground of the breakwater of the Tarragona harbor, at few meters from the open air coal storage area. Elemental analysis of the black dust (C, N, H and S) was performed. A daily sample of PM10 was also collected and analyzed for five consecutive days.

Results:
The total carbon content of the collected dust was 25.8%, 29.4% and 33.9% in the two buildings of La Pineda and the breakwater, respectively. In turn, the contribution of carbon from carbonates was 0.0%, 1.3% and 5.1%, in the samples of the two buildings and the breakwater, respectively. PM10 showed levels between 18 and 39 µg/m3, with mean and median levels of 29 µg/m3.

Conclusion:
The elemental analysis indicated that the two black dust samples collected in the two buildings of La Pineda were similar to the sample collected at the breakwater of the port of Tarragona, showing a common origin: The bulk coal storage area of Tarragona harbor. Because information on the human health risks derived from the important activities conducted in the port of Tarragona is currently non-existent, an exhaustive assessment of all pollutants involved in the activities of the port is strongly recommended.
COMMON FIXED POINTS OF A PAIR OF SELFMAPS SATISFYING CERTAIN WEAKLY CONTRACTIVE INEQUALITY INVOLVING RATIONAL TYPE EXPRESSIONS VIA TWO AUXILIARY FUNCTIONS IN PARTIALLY ORDERED METRIC SPACES
Authors: Babu Gutti Venkata Ravindranadh , Sarma Kandala Kanaka Mahalakshmi , Kirshna Padala Hari , Kumari Vallabhapurapu Asunee , Satyanarayana Gedala , Kumar Pathina Sudheer 
Published: April 2018

In this paper, we prove the existence of coincidence and common fixed points of a pair of selfmaps satisfying certain weakly contractive inequality with two auxiliary functions involving rational type expressions in partially ordered metric spaces. These results extend some of the known existing results in the literature from a single selfmap to a pair of selfmaps. Examples are provided in support of our results.
EXISTENCE OF SOLUTIONS FOR NONLINEAR IMPULSIVE DYNAMIC EQUATIONS ON A TIME SCALE
Authors: Ardjouni Abdelouaheb , Djoudi Ahcene 
Published: April 2018

Let T be a time scale such that 0,t_{i},T∈T, i=1,2,…,n, and 0<t_{i}<t_{i+1}. Assume each t_{i} is dense. Using a fixed point theorem due to Krasnoselskii-Burton, we show that the nonlinear impulsive dynamic equation {<K1.1/>┊<K1.1 ilk="MATRIX" >y^{Δ}(t)=-a(t)h(y^{σ}(t))+f(t,y(t)), t∈(0,T],y(0)=0,y(t_{i}⁺)=y(t_{i}⁻)+I(t_{i},y(t_{i})), i=1,2,…,n,</K1.1>where y(t_{i}^{±})=lim_{t→t_{i}^{±}}y(t), and y^{Δ} is the Δ-derivative on T, has a solution.
Managerial Ability and the Accuracy of the Going Concern Opinion
Authors: Berglund Nathan R. , Herrmann Donald R. , Lawson Bradley P. 
Published: April 2018

ABSTRACT
Current audit guidance directs the auditor to modify their opinion in the presence of significant doubt about their client's ability to continue as a going concern. This paper examines whether managerial ability influences the accuracy of auditors' going concern information signal. Following prior literature, we assess accuracy based on the subsequent viability of the client. We find that, while managerial ability decreases the risk of Type I errors (the auditor issues a going concern opinion for a firm that subsequently remains viable), managerial ability increases the risk of Type II errors (the auditor issues a standard unqualified report for a firm that subsequently files for bankruptcy). Considering prior research indicates that the auditor's opinion provides important information to the market, this finding has important public interest implications regarding the signaling of bankruptcy risk to investors and creditors by auditors' going concern opinion.
Una aproximación a las plazas actuales del Centro Histórico de San Cristóbal de Las Casas, Chiapas / The current squares of the Historical Center in San Cristóbal de Las Casas, Chiapas, an approach
Authors: Gómez Coutiño José Francisco , Vázquez Novillo María José 
Published: April 2018

Muchas de las plazas en las ciudades hispanoamericanas fueron creadas con base en la mezcla de las culturas prehispánica y española que dio lugar a un nuevo modelo urbano adaptado para cada una de estas ciudades[1]. El caso estudiado en este artículo es el de la ciudad de San Cristóbal de Las Casas, Chiapas, la cual, por contar con un Centro Histórico protegido, ha conservado sin alteraciones significativas las plazas que la conforman —a diferencia de otras ciudades, donde la transformación en la composición de sus plazas propició el cambio de uso de estas. Este conjunto fue conformado inicialmente por medio de una plaza principal que se ubicó en el centro; y más tarde, cuando creció la ciudad, fue rodeada por otras plazas construidas en el núcleo de cada barrio. Por lo tanto, se llevó a cabo una recopilación de los datos históricos del surgimiento de estas y los cambios que las han llevado a su consolidación actual. Finalmente, con la información recabada, se elaboró una clasificación que engloba sus funciones y características.[1] Variación que se generaba a partir de la traza ya existente y a la topografía del lugar. El modelo resultó un intento para compatibilizar la tradición presente con la norma oficial (Terán, 2002).
Ortaokul Matematik Ders Kitaplarında Yer Verilen Temsiller Arası İlişkilendirmeler
Authors: İNCİKABI Semahat , BİBER Abdullah Çağrı 
Published: April 2018

Bu çalışmanın amacı, ortaokul matematik ders kitaplarındaki
kullanılan temsil türlerini belirlemek ve temsil türleri arasında yer verilen
ilişkilendirmeleri ortaya koymaktır. Bu
araştırma nitel bir araştırma olup, ortaokul matematik ders kitaplarında yer
alan temsil türlerini analiz etmek için doküman analizi yöntemi kullanılarak
matematik ders kitapları, matematikte kullanılan sözel, cebirsel, model, tablo,
grafik ve gerçek yaşam temsilleri dikkate alınarak incelenmiştir. Çalışmada MEB komisyonu tarafından
hazırlanmış ve 2015-2016 akademik yılında kullanımda olan ders kitaplarında yer
alan etkinlikler, çözümü kitapta verilen sorular ve çözülecek sorular analiz
edilmiştir. Verilerin kodlama sürecinde birbirinden bağımsız çalışan iki
araştırmacı yer almıştır. Araştırma bulgularına göre ders kitaplarında yer
verilen temsiller arası geçiş en fazla cebirsel, sözel ve model temsiller ile
cebirsel, sözel, model ve açık temsiller arasında gerçekleşmiştir. Diğer ikili
eşleşmelerin oldukça düşük oranlarda kalması dikkat çekicidir.
The Protection of Human Rights in Indonesian Constitutional Law after the Amendment of the 1945 Constitution of the Republic of Indonesia
Authors: Tibaka Leli , Rosdian Rosdian 
Published: April 2018

The amendment to the 1945 Constitution of the Republic of Indonesia has shown progress in respecting, protecting and fulfilling human rights in Indonesia. It is proven from the advanced provisions that have set the human rights material, starting from the affirmation of fundamental rights, individual rights, social rights, solidarity rights, and even the assertion of rights included in the category of not-derogable rights in the Second Amendment to the 1945 Constitution. The urgency of the Constitution 1945 as written constitution due to its status as the ultimate instrument to determine a norm (law), action or government policy, so it will not violate human rights and constitutional rights of the citizens. Thus, the Constitution is an important instrument in term of guaranty and ensuring that human rights within the Republic of Indonesia are protected, even though the source of human rights is not actually derived from the State but naturally originated from natural law, whether its universal validity is either affirmed or not in the Constitution. It shows progress in the level of regulation and protection of human rights in Indonesia.Related to the guarantee of the protection of human rights, one of the important material of the 1945 Constitution of the Republic of Indonesia is the presence of a new judicial institution called the Constitutional Court, in addition to the Supreme Court. The existence of the Constitutional Court in Indonesia is an improvement in maintaining and upholding the Constitution and protecting human rights. Hence, the Constitutional Court referred to as “the Protector of Human Rights.” Protection of human rights is carried out through the exercise of authority as defined in Article 24C Paragraph (1) of the 1945 Constitution which is to review an Act against the Constitution, to judge on authority disputes of state institutions whose authorities are granted by the Constitution, to judge on the dissolution of a political party, and to judge on disputes regarding the result of a general election. Also, Article 24C Paragraph (2) obliges the Constitutional Court to render a judgment on the petition of the People’s Representative Council regarding an alleged violation by the President and the Vice President according to the Constitution. Keywords: Human Rights, Constitutional Law, Amendment to the Constitution.
The Product Characteristic of Electronic Money from the Perspective of the Negotiable Instruments Law
Authors: Putra Geigiansyah Aulia , Sabrie Hilda Yunita , Thalib Prawitra 
Published: April 2018

The development of currency trading is not only using the cash as a payment instrument for a transaction. For example is the emergence of non-cash payments such as negotiable instruments. That type of instrument offers a more effective and safer way than using the cash. Along with the development of the technology, a non-cash payment innovation emerged, which characteristics, at a glance, similar to negotiable instruments, such as credit cards, debit cards, and electronic money products which gives a safer and more efficient way than using the cash for a transaction. Based on this, led to the view that non-cash payment instruments such as credit cards, debit cards, and electronic money products can be classified as negotiable instruments. However, that classification must be done by reviewing the relevant regulations, such as Commercial Code and else and also observing the doctrines in the perspective of the science concerned, to state that the development of such instruments can be classified as negotiable instruments or not.Keywords: Negotiable instruments, Letter of Value, Credit Cards, Debit Cards, Electronic Money Products, Classification.
Legal Protection for Consumer of the Unlicensed Vapor from Drug and Food Supervisory Agency
Authors: Samudra Dedhi Bima , Mediawati Noor Fatimah , Multazam M Tanzil , Wati Emy Rosna 
Published: April 2018

This research begins with the number of liquid vapor which spread in Indonesia that is not licensed by BPOM, and there is no clear law for liquid vapor, so there is no clarity from legal protection against liquid vapor consumers who are not licensed by BPOM. Therefore, in this research, the formulation of the problem is as follows: Is there legal protection against liquid vapor consumers who are not licensed by BPOM? The purpose of this research is to determine whether there is legal protection against liquid vapor consumers who are not licensed by BPOM. So this research can be useful for subsequent research that has the same theme and beneficial to researchers, liquid vapor consumers and also for the government. The research method used is the normative method. Normative research methods use the statute approach. The result of the research shows that there is a legal protection for liquid vapor consumer who is not licensed by BPOM, which is reviewed from the Law of the Republic of Indonesia Number 36 Year on concerning the health of Article 113 paragraph (1) and Article 114, Law of the Republic of Indonesia Number 8 Year 1999 on Consumer protection Article 8 paragraph (1) c and paragraph (1) i, Regulation of the Head of the Food and Drug Supervisory Agency of the Republic of Indonesia Number 4 Year 2017 on the Supervision of the Importation of Drugs into the Territory of Indonesia Article 4 paragraph (1). Keywords: Legal Protection, Consumer, Liquid-Vapor
Labour Market Trends and Outlook
Authors: McLoughlin Simon 
Published: April 2018

This paper provides an overview of trends in the New Zealand economy and labour market in 2001 and 2002, and the outlook for 2003 and 2004. More people than ever before have been attracted into the New Zealand labour market during the last two years -from outside the labour force and from around the world- encouraged by robust growth in employment and wages, low unemployment, and employers who are finding it difficult to find suitable staff. The main driver of improving labour market conditions has been strong growth in the New Zealand economy (an average of 3 ½ per cent per annum in the last three years), despite the recent downturn in the world economy. The pattern of economic growth has changed in recent years, leading to varying rates of employment growth by industry and region. Nevertheless, labour market conditions have improved across the majority of regions, as well as across most of the broad ethnic and age groups, and by gender. The outlook is for the New Zealand economy to experience solid growth over the next two years, although there are important upside and downside risks. The positive central outlook is expected to see labour market conditions remain relatively strong during 2003 and 2004.