bluuebunny/crossref_metadata_2025_split huggingface dataset:
Faktor-Faktor Penentu Profitabilitas Return On Average Asset Pada Bank Umum Yang Terdaftar Di Bursa Efek Indonesia (BEI) [Determinants of Profitability of Return on Average Assets of Commercial Banks Registered in Indonesian Stock Exchange (IDX)]
Authors: Manu Viladelva Vio Vieresta Saras 
Published: August 2022

<p>This study was conducted to determine the determinants of the profitability<em> </em>of<em> return on average </em>bank assets such as <em>size, capad, bcost, and risk</em> in 46 commercial banks in CapitalIQ with a monthly period in the period 2010–2020. The data analysis methods used are chow test, hausman test, langrage multiplier test, as well as diagnostic tests (heterokedasticity test, classical assumption test and cycling test). The results of this study show that (1) <em>Size </em>has no impact because it is not significant to the profitability of <em>return on average assets</em> (2) <em>Capad</em> has no impact because it is not significant to the profitability of <em>return on average assets</em> (3) <em>Bcost</em> has a negative but significant impact because affects the increase in profitability <em>of return on average assets</em><em> and</em> (4)<em> Risk </em>has no impact and is not significant on the profitability of <em>return on average assets.</em></p><p><strong>BAHASA INDONESIA ABSTRACT</strong></p><p>Penelitian ini dilakukan untuk mengetahui faktor-faktor penentu profitabilitas <em>return on average asset </em>bank seperti <em>size, capad, bcost, dan risk</em> pada 46 bank umum yang terdapat di CapitalIQ dengan jangka waktu bulanan dalam kurun waktu 2010–2020. Metode analisis data yang digunakan yaitu uji chow, uji hausman, uji langrage multiplier, serta uji diagnostik (uji heterokedastisitas, uji asumsi klasik dan Uji pesaran). Hasil penelitian ini menunjukkan bahwa (1) <em>Size </em>tidak berdampak karena tidak signifikan terhadap profitabilitas <em>return on average asset</em><em> </em>(2) <em>Capad</em><em> </em>tidak berdampak karena tidak signifikan terhadap profitabilitas <em>return on average asset</em> (3) <em>Bcost </em>berdampak negatif tetapi signifikan karena mempengaruhi kenaikan profitabilitas <em>return on average asset</em><em>,</em><em> </em>dan<em> </em>(4)<em> Risk </em>tidak mempunyai dampak dan tidak signifikan terhadap profitablitas <em>return on average asset.</em></p>
Geological Characteristics and Controlling Factors of Deep Shale Gas Enrichment of the Wufeng-Longmaxi Formation in the Southern Sichuan Basin, China
Authors: Li Jing , Li Hu , Yang Cheng , Wu Yijia , Gao Zhi , Jiang Songlian 
Published: August 2022

Abstract
To identify the factors controlling high-quality deep shale gas reservoirs and the exploration and development potential of the Lower Paleozoic marine shale in the Sichuan Basin, the sedimentary environment of deep shale was comprehensively analysed using core thin sections, scanning electron microscopy, gamma ray spectrometry logging, and elemental logging data. In addition, the geological conditions of deep shale gas accumulation and the effect of tectonic processes on the preservation conditions are discussed based on the experimental data of mineral composition analysis, geochemical features, and reservoir spatial characteristics. (1) The sedimentary environment changes from an anoxic water environment to an oxygen-rich oxidizing environment from bottom to top in the Wufeng-Longmaxi Formation in southern Sichuan. The deep shale gas reservoir shows overpressure and rich gas characteristics, namely, high formation pressure (2.0~2.2), high porosity (20%~55%), and high gas content (4.0~5.0 m3/t). (2) The favourable sedimentary environment has a higher hydrocarbon generation potential and deposits of rich organic matter and siliceous particles. During the hydrocarbon generation process, the rich organic matter generates a large number of organic pores and a large specific surface area, which provides the main reservoir and adsorption space for free and adsorbed shale gas. A large number of biogenic siliceous particles provide a solid rock support framework for the shale reservoir, thereby maintaining excellent reservoir physical properties. (3) Late and small stratigraphic uplifts result in a short shale gas escape time and favourable preservation conditions. Additionally, the small-scale faults and a high-angle intersection between the fracture strike and the geostress direction are conducive to the preservation of shale gas. (4) A high formation pressure coefficient, a sedimentary environment rich in organic siliceous deep-water continental shelf microfacies, and a relatively stable tectonic structure are conducive to the accumulation of deep shale gas.
Perumusan Strategi Institut Agama Islam Negeri (IAIN) Ponorogo dalam Meningkatkan Daya Saing Research
Authors: Anis Yuana Etika Sari  , Ahmadi  
Published: August 2022

Tulisan ini membahas tentang perumusan strategi Institut Agama Islam Negeri (IAIN) Ponorogo dalam meningkatkan daya saing research. Penelitian ini mengambil tempat di Institut Agama Islam Negeri (IAIN) Ponorogo dengan pertimbangan kampus tersebut memiliki potensi yang cukup memadai di antaranya : sebagai kampus yang berjargon “The Research University”, jumlah mahasiswa yang cukup banyak, memiliki dosen dan karyawan yang mumpuni, memiliki sarana dan prasarana yang cukup memadai yang mendukung penelitian. Penulis akan membahas empat pokok permasalahan dalam tesis ini, adalah pertama, Bagaimana perumusan visi misi IAIN Ponorogo dalam meningkatkan daya saing research? Kedua, Bagaimana kondisi lingkungan IAIN Ponorogo dalam meningkatkan daya saing research? Ketiga, Bagaimana perencanaan jangka pendek, menengah, dan panjang pada IAIN Ponorogo dalam meningkatkan daya saing research ? keempat, Bagaimana strategi unggul IAIN Ponorogo dalam meningkatkan daya saing research? Jenis penelitian ini adalah penelitian kualitatif dengan pendekatan studi kasus. Data dikumpulkan melalui teknik wawancara, observasi, dan dokumentasi. Adapun teknik analisis data menggunakan langkah-langkah reduksi data, penyajian data, dan penarikan kesimpulan. Hasil penelitian ini menunjukkan bahwa: (1) Perumusan visi misi sudah sesuai dengan kaidah yaitu bersifat dinamis mengikuti dinamika perkembangan riset, SDM, IPTEKS, Visi sejalan dengan Misi dijabarkan secara konsisten ke dalam tujuan, sasaran, strategi dan program.(2) Pengoptimalan sarpras, pendanaan, memotivasi dosen maupun mahasiswa dalam melakukan penelitian, meningkatkan kualitas penelitian. (3) Pemberian kewenangan pengelolaan penelitian yang ber output pengelolaan secara transparan, akuntabel dan objektif. (4) Peningkatan pengelolaan penelitian dengan menerapkan manajemen berbasis sistem informasi, pemanfaatan sumber pendanaan penelitian yang tersedia di dalam maupun luar negeri, melakukan pembinaan kualitas penelitian kepada dosen/mahasiswa.
Type Curves of a Vertical Well Completed Within a Pair of Inclined Sealing Faults
Authors: Eziuzor Daniel , Adewole Steve 
Published: August 2022

Abstract
Type curves come in handy when our pressure buildup and pressure drawdown analysis do not yield a straight line hence generating a master curve for wells completed within a pair of sealing faults. The type curves from an observed data is superimposed on the master curve to estimate reservoir system properties. A sealing fault creates image wells, which communicate with each other and the object well. As a result, object well performance can be affected by reservoir boundaries, and positioning of a well therefore must be strategic to ensure oil production for a long time. This is because pressure drop across the producing well is the addition of the pressure drop of the object well and the several image wells created because of the inclination. This is the principle of superposition. The inclination of a sealing fault influences the number of image wells, n, with the model n = (360/θ) -1. With different angles of inclination of the sealing faults, polygons are constructed to determine the distances between the object well and corresponding image wells.
In this paper, both dimensionless pressure and dimensionless pressure derivatives type curves as functions of number of image wells, are produced assuming that a vertical well is completed within a pair sealing faults. Wellbore storage and skin effects are considered. The results provide distances for several angles of inclination. Object well design, image well distances and faults angle affect dimensionless pressure and dimensionless pressure derivative. Dimensionless pressure and dimensionless pressure derivative of 2.3026(n+1) per cycle and 0.5(n+1), respectively are observed.
Generating dimensionless pressure derivative curves helps the engineer to identify the point where the hump expires and where the straight-line analysis begins. That is the right point for well test analysis.
Optimal Well Designs and Process Frameworks: Keys to Reducing Well Cost and Winning in any Environment
Authors: Abolarin Olugbenga , Ayodele Adetokunbo , Williams Bodunde , Pita-Nwana Ikenna , Elendu Chidi 
Published: August 2022

Abstract
Growing concerns for global energy transition and dwindling demand for crude oil has impacted the revenues and investment portfolios of most oil and gas companies. More than ever, hydrocarbon exploration and production costs require extra scrutiny and prudence. Drilling and Completions costs take a significant proportion of the capital expenditure and savings realized from this would improve development cost per barrel, improve project economics and yield better returns for all stakeholders.
To unlock the fiscal values required to win in this economic climate and attract investments to develop oil and gas assets, a paradigm shift is needed on well delivery, well design and execution processes. Cost savings opportunities exist all through the well maturation, but the highest value can be realized in the design stage. This stage involves opportunity identification, alternatives generation, setting of value based well objectives, design, and engineering etc.
This paper discusses cost saving initiatives such as advanced casing design to optimize the number of casing strings run, slim well designs, streamlined formation evaluation plan, bottom hole assembly (BHA) optimization, equipment standardization, adoption of agile methodologies to determine minimum function objectives, utilization of data-analytics tools to drive performance, application of state-of-the-art technology, extensive use of peer assists and peer reviews etc. Proper adoption of these initiatives can yield up to 30% reduction in well cost and ultimately enable oil and gas companies to compete and win in any environment.
Experimental Investigation on Effect of Enzyme and Nanoparticles on Oil-Brine Interfacial Tension
Authors: Hannah Tinuola , David Oyinkepreye 
Published: August 2022

Abstract
Interfacial tension (IFT) is an interfacial phenomenon that commonly exist between immiscible liquids such as oil and brine that are found in the hydrocarbon reservoirs. High IFT in combination with high capillary forces plays a fundamental role in residual oil saturation in the reservoir rock pores. The effects of enzyme and silica nanoparticles on crude oil-water and crude oil-brine interactions were investigated and presented in this study. The potential of individual application of enzyme and silica nanoparticles as well as the combination of both were explored under different salinity conditions. The results of this study showed that the application of silica nanoparticles did not significantly reduce oil-brine IFT under different salinity conditions investigated in this study, although the highest reduction was obtained with low salinity brine. The use of enzyme however significantly reduced oil-brine IFT under varied salinity conditions and better IFT reduction was obtained in brines relative to aqueous solution. Finally, the combination of enzyme with nanoparticles effected better IFT reduction than the application of either of them individually in aqueous solution and it also significantly reduced oil-brine IFT in all salinity conditions. This study is a novel investigation on the potential of enzyme-nanoparticles to modify oil-brine IFT and the result of this study is significant to the design and application of enzyme and nanoparticles enhanced oil recovery processes.
Integrated Reservoir Management in a Marginal Oil Rim Field
Authors: Uche Chukwunonso , Eremiokhale Obehi , Esieboma Samuel , Uche Jennifer 
Published: August 2022

Abstract
The field under consideration is located about 50 Km offshore Nigeria in water depth of about 130ft.
The field was discovered in 1968 with X1 well. This particular well encountered oil in four different zones (IX, X, XI and XII) in the Pliocene Agbada formation. The X1 well was logged and tested to evaluate the potential. The second well, X2 was drilled in the early 70s and that was in a separate fault block. This second well encountered oil in two reservoirs, IX and X. The XI was poorly developed in X2 well relative to X1 well which was found wet. The XII reservoir was encountered with good oil shows and gas readings were found in poorer sections of the reservoir. A third well was drilled which did not encounter any hydrocarbon and many of the sands were poorly developed or absent relative to the X1 and X2 wells. No testing was conducted in this well.
The field was appraised with X4 well. The X4 well encountered oil in all the four sands. Pressure and log data were taken from the reservoirs in this well and the well was tested to know the true potential of each. The reservoir sands are of good to excellent quality but are unconsolidated and sand control will be required in the development phase.
The fluid quality is 25 deg API with moderate viscosity and a moderate GOR in the XII, and about 14 deg API with high viscosity and low GOR in the other reservoirs. Reservoir pressure and temperature is normal in the IX sand, slightly over-pressured in the X sand and significantly over-pressured in the XII.
Following the successful results of the subsequent appraisal programme, the reserves level increased significantly to more than 40 MMbbls. At this level the field was judged large enough to support a stand alone development. This had allowed a first proposal to initiate an initial development plan for the Field. Development drilling commenced in 2009 with first oil was recorded in 2010.
As the development of the field progressed the lessons learnt from first development phase of drilling were implemented in the second phase. This led to better wells with improved production rates.
In addition, effective reservoir management in the field has led to optimized production which saw recovery factor in these oil rim reservoirs getting above 30%. This paper highlights the challenges encountered, innovative solutions and key learnings along each phase of development.
Enhancing Reservoir Stimulation through Mathematical Remodeling of Pre-Flush Acidizing Volume Algorithm for Different Reservoir Flow Geometries
Authors: Osuala Justice Chidera , Egu Daniel Ikechukwu , Ilozobhie Anthony John , Nwojiji Blessing Ogechi 
Published: August 2022

Abstract
Studies show that an average of 35% of reservoir acid stimulation operations executed every year fails because of limited knowledge of downhole acid placement. Existing models designed for acid pre-flush volumes are limited to Linear, Radial and Ellipsoidal reservoir geometries, therefore, do not account for geological drifts of a typical heterogenic reservoir. This can be erroneous while estimating acid placement volumes as reservoirs can deviate from defined flow geometries due to their dynamic and heterogeneous nature, thereby challenging to estimate acid volumes precisely for stimulations. This study aims to foster sustainability in reservoir flow engineering by deriving a mathematical model that evaluates volumes for reservoirs with flow geometries that deviate from linear and radial. This was established to help introduce a new geometry contributing to the accountability of complex and heterogeneous reservoirs. Sensitivity analysis and investigation using reservoir core data from SPDC Petroleum Chemistry Laboratory were carried out to understand the relationship between Linear, Radial and Modified flow geometries. Analytical results for linear, radial and the fied were generated. These results proved the precision of the modified equation for calculating pre-flush acid volume for reservoir acid stimulation operation.
Investigation of Permeability Impairment Using Local Polymers for Enhanced Oil Recovery
Authors: Uzoho Chidinma Uzoamaka , Ade Enaanabhel , Onyekonwu Mike Obi 
Published: August 2022

Abstract
The use of viscosity enhancer in Polymer flooding decreases mobility and improves sweep efficiency of flood water. However, there is a likelihood of permeability impairment due to the polymer retention onto the rock surface. This leads to formation damage. Therefore, a good assessment and evaluation of this problem is important to oil recovery sustenance. In this study, the permeability reduction caused by some local polymers in Nigeria used for Enhanced Oil Recovery was investigated. A laboratory study was carried out using unconsolidated core plugs (sands packs) and crude oil from the Niger Delta field. Two of the core plug samples (control samples) were flooded with simulated brine concentration and viscosity of 20000ppm and 0.949cP respectively. Cisus populnea (Okoho), Abelmoschus esculentus (Okro), Irvingia gabonensis (Ogbono) and Gum Arabic were used as polymers. Water breakthrough time, oil recovery and mobility ratio results obtained from fourteen samples were recorded and compared with that obtained from using only brine. The permeabilities of core plug samples were estimated prior to and after polymer flooding by pressure drop calculation. Residual Resistant Factor (RRF) and adsorption capacity of these polymers at same concentrations of 1000 ppm, 2500 ppm and 5000 ppm were also estimated. At 5000ppm, the RRF and mobility ratio for Cisus populnea, Abelmoschus esculentus, Gum Arabic and Irvingia gabonensis were 2.341/0.91., 1.354/0.35, 2567/0.56 and 3/0.66 respectively. The percentage reduction in permeability and displacement efficiency for Cisus populnea, Abelmoschus esculentus and Gum Arabic are 3.9%/75.30%, 2.7%/89.50% and 4.2%/77% respectively. It was observed that there was no-flow while flooding with Irvingia gabonensis at 5000ppm. The results from the study indicate that Irvingia gabonensis triggered the highest permeability impairment while Abelmoschus esculentus gave the least permeability impairment. The best performed polymer is Abelmoschus esculentus with highest displacement efficiency, reduced mobility ratio, lowest RRF values, lowest static and dynamic adsorption.
Polymer Selection for Enhanced Oil Recovery in a Niger-Delta Formation Via Laboratory Experiments
Authors: Dennar Linda , Amro Mohammed , Reichmann Sven 
Published: August 2022

Abstract
Several Scholarly articles have been written on the efficacy of Local and Foreign Polymers as agents of mobility control in Enhanced Oil Recovery Systems. Polymers are Non-Newtonian Fluids that are significantly affected by the reservoir properties. The Polymer chemistry is strongly dependent on Temperature and Salinity of injection/formation water thus the need for laboratory investigations of compatibility. Polymer solutions also undergo losses through adsorption and entrapment during propagation within the reservoir and subsequently create poor sweep if this happens.
This research has investigated the suitability of two Polymers in the Niger Delta Formation: Xanthan Gum which is a biopolymer and Polyacrylamide a Synthetic polymer. Using an Analogue core sample having similar properties with the "Case Study" and a 2.8g/l polymer concentration obtained via 3-Dimensional simulation model, a laboratory core flood experiment was performed. The essence of the flooding analysis was to investigate
The Residual Resistant Factor associated with the polymer solutions which is also an indication of the property changes associated with the reservoir post flooding. The benefits and economic viability of Polymer slug sizes with the addition of CO2 (Polymer Alternating Gas-PAG) was also investigated. Unsteady State single-phase permeability The Resistance Factor for the reservoir
Results from the 2.8g/l solution of Polyacrylamide flooding shows a favorable Residual Resistance Factor of 0.97 to 7.05. Indications from the results suggests that using smaller slug models would not be favorable for such deployments. Larger slug models yield better RRFs, while a combination of Larger Slugs + CO2 results in a more economic resource use as less polymer is deployed. 2.8g/l Xanthan solution though having good Rheology showed very high RRFs (75-124) suggesting a possibility of encountering injectivity issues. Further investigations will be required to ascertain the effects of reducing the concentration of Xanthan on the injectivity and generally on the recovery process.
A good handle on the concentration and chemical suitability of polymers with the inherent reservoir properties is the starting point of an efficient deployment of polymers as mobility control agents.
Deregulation of the Downstream Sector of the Nigerian Oil Industry and its Impact on Pump Price of Petroleum Products
Authors: Ekeinde Evelyn Bose , Dosunmu Adewale , Okujagu Diepiriye Chenaboso , Obazeh Dumbili Jerome 
Published: August 2022

Abstract
The oil industry is clearly the mainstay of the Nigerian economy, with revenues from the industry accounting for over 80% of the nation's foreign exchange as well as over 80% of GDP. Therefore, the importance of the petroleum industry to Nigeria's development and economic strength cannot be over stressed. This paper discusses the deregulation of the downstream sector of the Nigerian petroleum industry with emphasis on product pump price. Over the years it has been observed that despite the large volumes of revenue coming from the petroleum industry, the price of petroleum products continues in Nigeria continues to rise even with huge amounts of money spent on subsidizing product pump price to keep them affordable to the Nigerian people. The paper tries to analyse the concept of deregulation and how a well-planned and deregulation policy can be effected to achieved the desired goals of product availability and minimal pump prices. It proposes that a truly and fully deregulated downstream will not necessarily result in product pump prices that are lower than the current both in the short or long terms, but in a competitive market with many players compete resulting in product availability and competitive pricing. It puts forward that the government would have to put in place measures to curb corruption and collusion which might disparage on the successful deregulation of the subsector. It proposes that if the deregulation of the downstream is to yield best outcomes especially in product pump price then having an effective domestic refining capacity is very imperative which would include revamping the state owned refineries, issuing licenses’ for the construction of new refineries and operating them optimally. It recommends that the deregulation of the downstream must be gradual in order to achieve its desired goals