bluuebunny/crossref_metadata_2025_split huggingface dataset:
Application of New Interpretation Workflows that Improve Cement Evaluation in Presence of Microannulus
Authors: Issabekov Yerlan , Kalyanaraman Ram Sunder , Haoua Taha Ben , Benaicha Hani , Gout Olivier J. 
Published: October 2017

Abstract
In many cases when using traditional cement evaluation techniques, we observe disagreement between the ultrasonic and sonic measurements on the quality of cement sheath. In some instances, both measurements can lead to a pessimistic assessment of the cement sheath in spite of a well-executed cementing job. To improve the robustness of the cement evaluation, new interpretation workflows were tested in North Africa to investigate if the apparent "disagreement" can be explained and result in an improved cement evaluation.
The data acquired in wells in North Africa was processed and interpreted with traditional workflows and compared with new interpretation workflows that were recently made available. The new workflows include a) an ultrasonic workflow that improves the discrimination of lightweight solids and through its detection of the presence of a microannulus also provides the ability to discriminate a dry microannulus situation and b) a novel way of comparing sonic and ultrasonic measurements in the acoustic impedance space. The workflows have been applied in many wells and have been seen to improve the robustness of the cement evaluation that is consistent with the expectation for a cementing operation. In case studies from data acquired in two wells in North Africa, we observed that presence of a wet or dry microannulus affected the ultrasonic and sonic responses differently, which the traditional evaluation techniques failed to address adequately—in some cases resulting in a pessimistic assessment of the cement sheath. The new workflows enable not only the detection of the presence of a microannulus but also allow discriminating between a wet microannulus and a dry microannulus.
This improved ability to diagnose debonded cement behaviour in situ has helped us arrive at consistent, robust, and reliable evaluation of the cement sheath. The examples presented in this paper demonstrate the successful application of new interpretation workflows for ultrasonic and sonic measurements that improve the confidence of cement evaluation, especially when cement has debonded from casing. This ability also has the potential to reduce unwanted and costly cement remediation work.
Retrievable Inflatable Bridge Plug used as Solution Product for Through Tubing Intervention in Deepwater GoM
Authors: Ramnath Lawrence , Pocza James , Reynolds Andrew 
Published: October 2017

Abstract
This paper discusses how the application of a Retrievable Inflatable Bridge Plug (RIBP) helped overcome the challenges encountered in a subsea deepwater intervention operation. The technical details of the challenges are first outlined, followed by the salient features of the RIBP that facilitated its successful use.
The RIBP was used to isolate the reservoir prior to change-out of the upper completion tubing as per the intervention scope of work. The monobore completion for which the intervention was planned did not have any nipple profiles to allow for reservoir isolation using a traditional lock and plug. Therefore, through-tubing Mechanical Bridge Plug (MBP) technologies had to be considered. Only the RIBP was able to provide the functionality for the intervention operation. This RIBP technology was applied successfully to two different wells with identical scopes of work.
The inflatable technology provided a robust solution to the compound challenges faced during the planned intervention operation. Since these challenges are common to the industry, especially in the deepwater subsea environment, the successful RIBP application discussed in this paper increases confidence in the future use of such technology.
Predicting Dead-End Pore-Volume in a Reservoir from Single Tracer Experiment
Authors: Phirani Jyoti , Roy Shantanu , Pant Harish J. 
Published: October 2017

Abstract
Tracer studies are used to characterize the porous media for pore volume occupied by different phases and flow trajectories and velocity of the phases. When a tracer is injected as a pulse into a liquid stream flowing in a porous media, the stagnant or the dead-end pore volume in the porous media interacts with the tracer leading to a tailing effect in the outlet tracer curve. The tailing-effect impacts the determination of the flow path or the phase saturations in the porous media using the outlet tracer concentration. Generally, history matching of the effluent concentration profile is used to determine and separate the effect of dead-end pore volume from other tracer behavior in the reservoir such as dispersion or convection. History matching is computationally expensive and many simulation runs are required to match the exit concenetration profile. In the present work we have used the method of moments of the Residence Time Distribution (RTD) of the tracer to determine dead-end pore volume and parameters associated with it. We are able to describe from the method deviced, which parameters can be determined and which cannot be determined in different flow scenarios in the porous media. We also use numerical experiments of the tracer transport in porous media and compare the results with the method of moments. In the end, we delineate general guidelines for estimation of the parameters, especially the dead-end pore volume.
An Enhanced Pseudo-3D Model of Hydraulic Fracture in Multi-Layered Formation
Authors: Budennyy Semen 
Published: October 2017

Abstract
The manuscript presents the development of hydraulic fracturing simulation tool based on cell-based pseudo-3D model. The model was upgraded up to enhanced P3D model that accounts for viscous dissipation in lateral growth implicitly. In addition to P3D model enhancement the aim of present paper is to explore crucial effects and processes taking place during hydraulic fracturing simulation: proppant particles settling, tip-screen out, interaction between several fractures in multi-stage treatment. To achieve the goal we developed the mathematical model that is able to simulate the fracture growth in highly non-uniform geological lithology, the flow of non-Newtonian liquid and proppant particles in the fracture channel, interaction between fractures. All of these effects are investigated separately, the impact of each process on the fracture shape is discussed, possible solutions are suggested.
Profitability Calculations of Abandoned Mine Methane Production in the Upper Silesian Coal Basin
Authors: Labuda Wojciech 
Published: October 2017

Abstract
The aim of the paper is to identify whether and to what extent an exploitation of abandoned mine methane (AMM) is economically viable in the Upper Silesian Coal Basin (USCB).
Nowadays coal mining in many countries is in a crisis because of imposing decarbonization policy on one hand, and displacement of energy based on hard coal by energy based on renewables on the other. It turns out that methane accumulates in significant amounts in abandoned underground coal mines’ pathways, galleries and gobs. Hence, both electricity and heat production (combined heat and power – CHP) from AMM could improve the economic situation of post-mining areas and provide clean energy. Moreover, utilization of AMM exploited by boreholes drilled from surface could increase safety in neighboring working hard coal mines. However, existence of these advantages is determined by economic calculation.
Firstly, I identified the factors influencing the level of investment costs and the size of revenues. In both cases I left the popular deterministic assessment and I decided to use stochastic approach, which allows a better reflection of reality by taking into account the variability and unpredictability of the future price of electricity, heat, drilling and other factors. Calculation is based on real data acquired from the local electric power industry. The analysis was possible by using the Monte Carlo method and @Risk program from the Palisade’s package – Decision Tools. Eventually, I prepared sensitivity and scenario analysis to identify which factors have the greatest impact on the profitability of such projects.
Abandoned mine methane may soon become a valuable source of income for the mining areas struggling with many socio-economic problems and become a bridge between coal-based energy system and clean energy resources.
Pore-Scale Experimental Study of Matrix-Fracture Interactions during Tertiary Gas Injection in Carbonates Using X-Ray Microtomography
Authors: Sabti Mohammad 
Published: October 2017

Abstract
Fractured oil reservoirs, which are among the most technically complicated oil and gas reservoirs, often trap significant amounts of recoverable oil within the matrix. Extraction of this oil requires a better insight of the main displacement physics controlling matrix-fracture interactions. Immiscible gas injection, for example, is one of the common techniques used to improve oil recovery from fractured reservoirs. However, the presence of fractures in such reserves as a high permeable path impacts the displacement physics and consequently the oil recovery, especially where three phases (i.e., brine, oil, and gas) coexist.
In this study, I performed a set of two- and three-phase experiments under tertiary gas injection using spreading oil on a fractured 10-mm diameter limestone rock sample by utilizing micro-CT imaging technique. The aim is to compare pore fluid occupancies under a wide range of oil saturations within the pore space and the fracture openings. Interpretation of the micro-scale images helps to capture a detailed map of the fluid arrangements within the pore space in the matrix and the fracture. These maps clearly demonstrated the relevance of spreading phenomena to fluid displacements in the fracture undergoing three-phase flow processes.
The saturation profile over the course of the gas injections showed that brine was predominately produced first since it was the most well-connected phase. After increasing the gas flow rate, the gas obtained sufficient capillary pressure to invade areas containing trapped oil at which point oil layers began to form and re-connect the oil phase. The oil layers allowed the further production of oil with each incremental increase in gas flow rate. Oil layers were seen to be thicker at lower flow rates and became progressively thinner with increased capillary number. Overall, it was found that, at higher oil saturations, the displacement of oil was predominantly achieved by the connectivity of the bulk oil after the evolution of the reconnected trapped oil blobs in the matrix, whereas at lower oil saturations, the displacement of oil was governed by the stability and the hydraulic connectivity of the spreading oil layers that maintained the continuity of the oil phase from the matrix to the fracture.
Improved Method of Moments to Determine Mobile Phase Saturations With Single Well Chemical Tracer Test
Authors: Tian Wei 
Published: October 2017

Abstract
The residual oil saturation obtained from SWCTT is critical for designing enhanced oil recovery (EOR). However, a key assumption in conventional SWCTT is that only single phase (water) is mobile. In reality, this is often not the case, and significant error can occur if the conventional SWCTT analysis method is used when multiple phases flow at the same time. The objective of this study is to improve the accuracy and precision of SWCTT interpretation in multi-phase flow condition.
In this paper, we propose an innovative procedure of modified SWCTT and the method of moment (MoM), aiming at the two-mobile-phase condition. In the development of the algorithm, a ratio parameter is introduced to adjust the calculated swept volume difference between the conservative tracer and partitioning tracer. In addition, a mixture injection of oil and water is required, instead of pure water injection in SWCTT.
The proposed approach is verified through numerical simulation on synthetic cases with known input parameters. The simulated models consist of a radial flow regime with a single vertical well in the center. The input oil saturation varies from 0.1 (immobile oil saturation) to 0.9. Our results show that the saturation estimated from modified MoM matched the simulation input data, which indicates that our approach is able to capture the saturations under two-mobile-phase condition. Moreover, the modified MoM can also be applied in single-mobile-phase condition and improved accuracy of conventional MoM.
Meningkatkan Profesionalisme Guru Kelas I Dan II Melalui Optimalisasi Pelaksanaan Supervisi Akademik Di Gugus Nakula V Kecamatan Serengan Kota Surakarta
Authors: Ismiyatun Ismiyatun 
Published: October 2017

This research aimed at increasing the teacher’s ability in making a lesson plan and conducting a learning process in the class. Type of this research is an Action Research. This research was conducted in 5 school areas of Gugus V Nakula of Serengan Sub-district, Surakarta. The location selection of this research was because the schools are under the guidance of the researcher, because from the results of observation, there were still many teachers who had not understood the main task and functions of a professional teacher. This research was conducted for three months from July 2011 to September 2011, starting from the preparation up to the reporting. Basically, the data which became the analysis materials were primary data that were through a direct observation obtained from the respondents by using the Instrument of Observation. The data consisted of data on the teachers’ ability in composing a syllabus and lesson plan (RPP), as well as implementing a learning in the class. The results of the research conclusion and discussion were as follows: 1) The giving of guidance in the beginning of composing the syllabus, the lesson plan, and the implementation of learning can optimize the results of supervision that was increasing the teachers’ professionalism. It could be viewed from the increase in the teachers’ ability from the early condition, cycle I and cycle II based on the data obtained by the researcher; 2) The Academic Supervision could increase the teachers’ ability in becoming professional teachers. From 13 teachers who became the researcher’ partners, their professional ability was increased significantly. In composing the lesson plan in the cycle I, from 13 teachers, all of them (100%) obtained scores under 90. Nevertheless, in cycle II, the scores of all teachers increased, therefore, only one teacher whose score was under 90 (7.69%). Similarly, in their ability of implementing the learning, in cycle I, only 2 teachers whose scores were above 80 (15%). Nevertheless, in cycle II, the teachers’ scores increased totally, only one teacher whose score was under 90.
PENGARUH KECUKUPAN MODAL, RISIKO PEMBIAYAAN, EFISIENI OPERASIONAL DAN LIKUIDITAS TERHADAP PROFITABILITAS (Studi Pada Bank Syariah dan Bank Konvensional di Indonesia)
Authors: Setiawati Erma , Rois Dimas Ilham Nur , Aini Indah Nur 
Published: October 2017

AbstractThe competition between conventional and Islamic banks is quite strict, this becomes a common trend because the banks want to attract and maintain the relation with their costumer, each bank must try and work hard to show their optimal financial performances.This research aims to find out the effect of capital adequacy, financing risk, operational efficiency and liquidity on the profitability of Islamic banks and Conventional banks, as well as to analyze the differences effect of capital adequacy, financing risk, operational efficiency and liquidity on profitability in Islamic banks and conventional banks in Indonesia. Population in this research are all Islamic bank and a conventional bank that listed in Indonesian bank (Bank Indonesia) on 2011-2015. This research using purposive sampling technique, with the samples involving three Islamic bank and four conventional banks in Indonesia. The data is analyzed by multiple regression analysis and descriptive analysis. The result of this research shows that the capital adequacy and operational efficiency has a significant effect on the profitability of Islamic banks. The financing risk and liquidity have no significant effect on the profitability of Islamic banks. While the capital adequacy, operational efficiency, and liquidity have a significant effect on their profitability conventional banks, and the financing risk is not affected to conventional banks profitability. The result of this research also showed that there's a difference in the effect of capital adequacy, financing risk, operational efficiency and liquidity on profitability between Islamic banks and Conventional Bank. Keywords: capital adequacy, financing risk, operational efficiency, liquidity and profitability
DETERMINAN MINAT NASABAH PENGGUNA JASA RAHN DAN IJARAH PADA KANTOR CABANG PEGADAIAN SYARIAH MADIUN
Authors: Amah Nik 
Published: October 2017

This study aims to examine the determinants of customers interest who use rahn and ijarah services at the branch offices of Syariah Madiun branch covering the principles of syariah, ujrah, and service. Sampling was conducted by Accidental Sampling technique to get sample of 227 respondents. Data collection use questionnaires. The analysis method used in this research is Multiple Linear Regression Analysis. The result of the research shows that: (1) the application of sharia principle influences the customer interest who use rahn and ijarah service, (2) ujrah does not affect the customers interest who use rahn and ijarah services, (3) the service influences customers interest who use rahn and ijarah services, and (4) The application of sharia principles, ujrah, and services simultaneously affect the customers interest who use serve rahn and ijarah services. Keywords: syariah principle, ujrah, services, customer interest.
Antihistaminic and cardiorespiratory effects of diphenhydramine hydrochloride in anesthetized dogs undergoing excision of mast cell tumors
Authors: Sanchez Andrea , Valverde Alexander , Sinclair Melissa , Mosley Cornelia , Singh Ameet , Mutsaers Anthony J. , Hanna Brad , Johnson Ron , Gu Yu , Beaudoin-Kimble Michelle 
Published: October 2017

Abstract
OBJECTIVE To evaluate the effects of IV diphenhydramine hydrochloride administration on cardiorespiratory variables in anesthetized dogs undergoing mast cell tumor (MCT) excision.
DESIGN Randomized, blinded clinical trial.
ANIMALS 16 client-owned dogs with MCTs.
PROCEDURES In a standardized isoflurane anesthesia session that included mechanical ventilation, dogs received diphenhydramine hydrochloride (1 mg/kg [0.45 mg/lb], IV; n = 8) or an equivalent volume of saline (0.9% NaCl) solution (IV; control treatment; 8) 10 minutes after induction. Cardiorespiratory variables were recorded throughout anesthesia and MCT excision, and blood samples for determination of plasma diphenhydramine and histamine concentrations were collected prior to premedication (baseline), throughout anesthesia, and 2 hours after extubation.
RESULTS Cardiorespiratory values in both treatment groups were acceptable for anesthetized dogs. Mean ± SD diastolic arterial blood pressure was significantly lower in the diphenhydramine versus control group during tumor dissection (52 ± 10 mm Hg vs 62 ± 9 mm Hg) and surgical closure (51 ± 10 mm Hg vs 65 ± 9 mm Hg). Mean arterial blood pressure was significantly lower in the diphenhydramine versus control group during surgical closure (65 ± 12 mm Hg vs 78 ± 11 mm Hg), despite a higher cardiac index value. Plasma histamine concentrations were nonsignificantly higher than baseline during maximal manipulation of the tumor and surgical preparation in the diphenhydramine group and during surgical dissection in the control group.
CONCLUSIONS AND CLINICAL RELEVANCE IV administration of diphenhydramine prior to MCT excision had no clear clinical cardiorespiratory benefits over placebo in isoflurane-anesthetized dogs.
Endovascular treatment of a high-flow hepatic arteriovenous malformation with secondary portal hypertension in a dog
Authors: Case J. Brad , Boston Sarah E. , Porter Erin P. , Toskich Beau B. 
Published: October 2017

Abstract
CASE DESCRIPTION A 17-month-old neutered female Labrador Retriever with a 3- to 4-month history of abdominal distention was referred for evaluation and treatment.
CLINICAL FINDINGS Evaluation of a peritoneal fluid specimen collected by the referring veterinarian indicated a pure transudate. At admission, transabdominal ultrasonography revealed microhepatica, dilation of the intrahepatic and mesenteric vasculature, peritoneal effusion, and multiple aberrant blood vessels. A large, high-flow hepatic arteriovenous malformation (HAVM) with secondary portal hypertension, peritoneal effusion, multiple acquired portosystemic shunts, and microhepatica was evident on CT angiography.
TREATMENT AND OUTCOME Transfemoral hepatic arteriography and staged coil and glue (n-butyl cyanoacrylate) embolization of the complex arteriovenous malformation nidus and central main left hepatic artery resulted in ablation of the lesion, restoration of arterial blood flow to the contralateral hepatic lobes, and resolution of the peritoneal effusion. The dog remained without clinical signs of hepatic disease until it was euthanized 5 months after treatment for an unrelated condition.
CLINICAL RELEVANCE Successful endovascular management of a HAVM was accomplished by means of coil and glue embolization in the patient of this report. Dogs with comparable HAVMs may benefit from similar minimally invasive treatment.
Evaluation of drug content (potency) for compounded and FDA–approved formulations of doxycycline on receipt and after 21 days of storage
Authors: KuKanich Kate , KuKanich Butch , Slead Tanner , Warner Matt 
Published: October 2017

Abstract
OBJECTIVE To determine drug content (potency) of compounded doxycycline formulations for veterinary use and of US FDA–approved doxycycline formulations for human use < 24 hours after receipt (day 1) and after 21 days of storage under recommended conditions (day 21).
DESIGN Evaluation study.
SAMPLE FDA-approved doxycycline tablets (100 mg), capsules (100 mg), and liquid suspension (10 mg/mL) and compounded doxycycline formulations from 3 pharmacies (tablets [25, 100, and 150 mg; 1 product/source], chews [100 mg; 1 product/source], and liquid suspensions or solution [6 mg/mL {2 sources} and 50 mg/mL {1 source}]).
PROCEDURES Doxycycline content was measured in 5 samples of each tablet, chew, or capsule formulation and 5 replicates/bottle of liquid formulation on days 1 and 21 by liquid chromatography and compared with US Pharmacopeia acceptable ranges.
RESULTS All FDA-approved formulations had acceptable content on days 1 and 21. On day 1, mean doxycycline content for the 3 compounded tablet formulations was 89%, 98%, and 116% (3/5, 5/5, and 1/5 samples within acceptable ranges); day 21 content range was 86% to 112% (1/5, 5/5, and 4/5 samples within acceptable ranges). Day 1 content of chews was 81%, 78%, and 98% (0/5, 0/5, and 5/5 samples within acceptable ranges), and that of compounded liquids was 50%, 52%, and 85% (no results within acceptable ranges). No chews or compounded liquid formulations met USP standards on day 21.
CONCLUSIONS AND CLINICAL RELEVANCE FDA-approved doxycycline should be prescribed when possible. Whole tablets yielded the most consistent doxycycline content for compounded formulations.