bluuebunny/crossref_metadata_2025_split huggingface dataset:
Study on Ultimate Recovery Factor and Oil Recovery Rate of Water-Flooded Sandstone Oil Fields in Eastern South China Sea
Authors: Xiong Qi , Yan Zhenghe , Li Li , Yang Yong , Wang Yahui , Chen Xiao 
Published: March 2021

Abstract
Under the natural energy development of Marine sandstone oil fields in the east of the South China Sea, the recovery degree of some oil fields has exceeded 65%, and the production capacity is still strong. The high-speed development model does not seem to have an adverse effect on oil recovery. Based on the existing knowledge and technical conditions, it is difficult to analyze and predict the final recovery rate of oil field. The reasonable boundary between the oil rate and recovery is also unclear.
In this study, we investigate the correlation between oil rate and recovery rate by experiment and field practice. Based on the microscopic displacement experiment, the variation rules of phase permeability, wettability, residual oil, displacement efficiency and sweep volume of different displacement multiples are studied. The variation law of oil rate and recovery under different fluidity and well control conditions is studied by mathematical statistics according to the production dynamic data. Thus, the influencing factors and percolation mechanism of the optimal recovery under high multiples water flooding are clarified, and the relationship between the reasonable oil rate and optimal recovery under different reservoir conditions is formed.
Micro experiments show that high multiples water flooding can improve the reservoir property, change wettability of rocks, reduce the residual oil saturation, improve oil displacement efficiency and the final oil displacement efficiency can reach 80%. Statistical research shows that when the oil recovery rate is less than 10%, the recovery rate increases with the increase of oil rate. For bottom water reservoirs, the recovery rate is recommended to be no more than 8%.
The paper innovatively studies the correlation between the reasonable oil rate and optimal recovery in Marine sandstone oilfield from microscopic experimental analysis and macroscopic statistical research. The research results effectively guide the oil field production practice of more than 200 Wells in more than 20 oil fields in the eastern South China Sea in 2019, with a cumulative oil increase of more than 5 million barrels. And it has important guiding significance to the efficient and economical development of Marine sandstone oilfield.
Research on the Law of Liquid Production Index of Bohai Typical Oilfield Based on Big Data
Authors: Yue Baolin , Liu Bin , Shi Hongfu , Shi Fei , Zhang Wei 
Published: March 2021

Abstract
The prediction of reservoir fluid production law play a key role in offshore oil field development plan design. It determines the parameter selection of pump displacement, oilfield submarine pipe capacity, platform fluid handling capacity, power generation equipment, etc. If the liquid production forecast is too low, the capacity will be expanded later, while if the forecast is too high, it will result in a waste of investment, which directly affects the fixed investment in oilfield development. Based on the statistical analysis of big data, this paper applies the dynamic data of all single wells and full life cycle of the oil field to analyze the dimensionless liquid production index (DLPI) law, and further establish the liquid production index prediction formula on this basis. Thus, the different types of Bohai plate and statistical table of the characteristics of the DLPI of the reservoir are completed. The results show that the DLPI of Bohai Sea heavy oil reservoir are following: water cut &lt; 60 % indicates the trend is flat; water cut between 60 ∼ 80 % illustrates the slow growth (water cut 80 % is 2.5∼3 times); water cut &gt; 80 % shows rapid growth (water cut 95% is 5.5∼6 times). The DLPI of Bohai Sea conventional oil reservoir are as following: when the water cut &lt; 60%, the DLPI drops first, and then increase when the water cut is about 30% (the lowest point (0.7∼0.9 times)). When the water cut rise to 60%, the DLPI returns to 1 times; When the water cut is 60∼80%, it grows slowly (1.5∼2 times); when the water cut &gt; 80 %, it grows rapidly (water cut 95% is 2∼3 times). The study may provide a guidance to the prediction of the amount of fluid in offshore oilfields, provide a basis for the design of new oilfield development schemes and increasing the production of old oilfields.
Identification and Impacts of Dual Strings Completion Leak in History Matching of Highly Faulted and Multi Layered Clastic Oil Reservoirs
Authors: Mohmad Nis Ilyani , Ismadi Danu , Salleh Nor Hajjar , Romle Amirul Nur , Syed Abd Rahim Syarifah Puteh , Jamaluddin M Syafiq , Mohamad Khaireen , Azahari Nor Azwan , Yang Juhari 
Published: March 2021

Abstract
History matching is one of the paramount steps in reservoir model validation to describe, analyze and mimic the overall behavior of reservoir performance. Performing history matching on highly faulted and multi layered reservoirs is always challenging, especially when the wells are completed with multiple zones either with single selective or dual strings. The history matching complexity is also compounded with uncertainties in production allocation, well history and downhole equipment integrity overtime.
It is a common practice for deterministic history matching in reservoir numerical simulation to modify the both static and dynamic model parameters within the subsurface uncertainty window. However, for multi layered reservoirs completed with dual strings, another parameter that is most often get overlooked is the completion string’s leaking phenomenon that tremendously impacting the history matching.
The objective of this paper is to introduce dual strings leaking diagnostics methodology from various disciplines’ angles. We demonstrate these dual strings leaking phenomenon impact on history matching. This paper covers dual strings leak diagnostic methodology which includes production logging tool evaluation, well’s production performance and recovery factor analysis.
Possible factors that gives rise to the string’s leaks including material corrosion from high CO2 and sand production will also be discussed. We will demonstrate on how the leak phenomenon could be mimicked in the reservoir numerical model. Possible risks on future infill well identification if the leaks phenomenon is not incorporated will be also discussed.
The dual strings leaks diagnosis and application in numerical simulation is illustrated on a case study of Field "D", a multilayered sandstone reservoir in Malaysia of almost 3 decades of production. This proven leak identification and reservoir model history matching methodology has been replicated for all the fault blocks across the field. It potentially unlocks more than 100 MMSTB of additional oil recovery by drilling more oil producers and water injectors in future drilling campaigns.
Flowback Analysis Methodologies and Precipitation Risk During Siderite-Bearing Carbonate Acidizing
Authors: Al Baiz Abdualilah , Al Moajil Abdullah 
Published: March 2021

Abstract
Acidizing is the most commonly used method to stimulate carbonate reservoirs. To achieve a better assessment of the operation, a flowback analysis is conducted. Flowback analysis can give insights on the reservoir's response to the recipe. This analysis can be used to improve future treatment operations where some recommendations were deduced. The objective of this paper was to show the flowback analysis methodology following carbonate acidizing treatments with a focus on dissolved elements.
X-ray diffraction (XRD), X-ray fluorescence (XRF), environmental scanning electron microscope (ESEM), and inductive coupled plasma (ICP) were used to determine the composition of flowback fluids and the filtered precipitate. Combining the data from different techniques onsite and in laboratory assess the development of a methodology for calculating more accurate amounts of dissolved elements, formation water, and volumes of recovered fluids.
This analysis showed acid recipes efficiency of nearly 100% based dissolved calcite. Around 65% of injected fluids were lost into a formation. The iron concentration during the flowback was 1400 ppm, however, cumulative amount of iron in flow back samples was below expected value. Based on the formation's rock analysis, the theoretical amount of iron in the recovered flowback fluid was 1000 kg. The measured amount of iron was 500 kg and the rest could be assumed to be precipitated in a reservoir.
This study helps in understanding the flowback fluid analysis and its importance by using a step-by-step analysis procedure for flowback fluid samples from the carbonate acidizing operations. The results of this study help in tracking the elements that potentially help in estimating the lost fluids volumes and percentage of success for a carbonate reservoir acid operation.
Laser interstitial thermal therapy as an adjunct therapy in brain tumors: A meta-analysis and comparison with stereotactic radiotherapy
Authors: Franca Sabrina Araujo de , Tavares Wagner Malago , Salinet Angela Salomao Macedo , Teixeira Manoel Jacobsen , Paiva Wellingson Silva 
Published: March 2021

Background:
Minimally invasive procedures are gaining widespread acceptance in difficult-to-access brain tumor treatment. Stereotactic radiosurgery (SRS) is the preferred choice, however, laser interstitial thermal therapy (LITT) has emerged as a tumor cytoreduction technique. The present meta-analysis compared current SRS therapy with LITT in brain tumors.

Methods:
A search was performed in Lilacs, PubMed, and Cochrane database. Patient’s demographics, tumor location, therapy used, Karnofsky performance status score before treatment, and patient’s outcome (median overall survival, progression-free survival, and adverse events) data were extracted from studies. The risk of bias was assessed by Cochrane collaboration tool.

Results:
Twenty-five studies were included in this meta-analysis. LITT and SRS MOS in brain metastasis patients were 12.8 months’ versus 9.8 months (ranges 9.3–16.3 and 8.3–9.8; P = 0.02), respectively. In a combined comparison of adverse effects among LITT versus SRS in brain metastasis, we found 15% reduction in absolute risk difference (−0.16; 95% confidence interval P < 0.0001).

Conclusion:
We could not state that LITT treatment is an optimal alternative therapy for difficult-to-access brain tumors due to the lack of systematic data that were reported in our pooled studies. However, our results identified a positive effect in lowering the absolute risk of adverse events compared with SRS therapy. Therefore, randomized trials are encouraged to ascertain LITT role, as upfront or postoperative/post-SRS therapy for brain tumor treatment.
Selenium and alpha-tocopherol reduces ϑluoride induced oxidative stress in brain and muscle of mice
Authors: Chandra Shakar Reddy N  , Pratap Reddy K  
Published: March 2021

Fluoride is one of the common environmental pollutants. Its excessive exposure results in a wide array of toxicity phenotypes including oxidative stress, skeletal and soft tissue damage etc. Antioxidants such as Selenium (Se) and α-tocopherol are attractive agents for oxidative stress prevention because of their safety profile and wide availability. It is known that in combination, Se and alpha-tocopherol act synergistically against ROS formation. This study investigated the protective effects of selenium (05 µg/kg BW) and Alpha-tocopherol (2 mg/kg BW) on markers of oxidative stress in brain and muscle of mice exposed to sodium fluoride (20mg/kg BW) for 15 days. The results showed significant (p<0.05) alterations in markers of oxidative stress includes; an increase in xanthine oxidase activity and lipid peroxidation, a decline in SOD, CAT, GST and GPx activities in fluoride exposure group in comparison with control group indicates oxidative stress induced by fluoride. These changes were reversed modestly in Se and alpha-tocopherol alone treated groups and significantly (p<0.05) in the combinedly treated group indicating synergistic action in mitigation of fluoride effect.
Penerapan Corporate Social Responsibility (Csr) Terhadap Profitabilitas Perusahaan (Studi Kasus Pada Pt Bank Danamon Indonesia,Tbk)
Authors: Razak Linda Arisanty , Pasigai Muh Aris , Khatimah Husnul 
Published: March 2021

This study aims to analyze differences before and after the implementation of a CSR program on profitability carried out by PT. Bank Danamon Indonesia, Tbk. The type of research used in this research is quantitative descriptive research. Data obtained by documentation techniques in the form of financial statements of PT. Bank Danamon Indonesia Tbk before the implementation of CSR in 2002-2009 and after the implementation of CSR in 2010-2017. The calculation technique used in this study is to calculate the percentage of profitability ratios (ROA) of PT. Bank Danamon Indonesia Tbk. While the data analysis techniques used in this study used descriptive statistical tests and tested hypotheses with the Paired Sample T Test analysis method using a tool in the form of SPSS 23. The results showed that there were no differences before and after the implementation of CSR. There is no difference in profitability measured by ROA allegedly because social activities and environmental activities as a form of corporate responsibility for the surrounding environment and social are not good enough so that the impact on the company has not been seen. Besides, the types of banking companies that do not have a direct impact on natural resources also can be one of the factors there is no difference in profitability at PT. Bank Danamon Indonesia Tbk.
Pengaruh pijat oksitosin terhadap frekuensi His, durasi His pada ibu inpartu di BPM ASRI Tuban
Authors: Qonitun Umu , Qiftiyah Mariyatul 
Published: March 2021

Persalinan sangat penting dilakukan observasi HIS yaitu dengan melihat frekuensi dan durasi His sehingga proses persalinan kala I akan berlangsung dengan mulus, baik pada primi maupun multi (Astuti, 2013). Jika lama persalinan kala I berlangsung tidak normal maka masalah potensial dimungkinkan terjadi. Dan jika kontraksi uterus tidak baik maka pembuluh darah di daerah plasenta tidak terjepit dengan maksimal, hal ini yang mengakibatkan perdarahan postpartum (Studi, Keperawatan, Perintis, & Bakti, 2016). Tujuan penelitian ini untuk mengetahui pengaruh pijat oksitosin terhadap frekuensi his dan durasi his pada ibu inpartu di BPM ASRI Tuban.. Desain penelitian ini pra eksperimental (static-group comparation design) dengan pendekatan kohort, populasinya seluruh ibu bersalin normal di BPM ASRI Tuban bulan februari – mei 2019 sejumlah 60 responden, dengan menggunakan teknik sampling sistematik random sampling didapatkan jumlah sampel 52 responden dibagi menjadi kelompok kontrol (26 responden) dan kelompok eksperimen (26 responden). Variabel independen Pijat oksitosin sedangkan variabel dependen frekuensi his dan durasi his. Analisa data menggunakan independent sample t-Test dengan SPSS Vs 23. Frekuensi his pada kelompok eksperimen sebagian besar 14 responden (53,8%) mendapatkan Frekuensi his 4 kali dalam 10 menit dan ada Pengaruh Pijat Oksitosin terhadap Frekuensi His pada Ibu inpartu di BPM ASRI Tuban Tahun 2019. Sedangkan durasi his pada kelompok eksperimen sebagian besar 16 responden (61,5%) mendapatkan durasi his >40 detik dan ada Pengaruh Pijat Oksitosin terhadap durasi His pada Ibu inpartu di BPM ASRI Tuban Tahun 2019. Terdapat pengaruh pijat oksitosin terhadap Frekuensi his dan durasi his pada ibu inpartu di BPM ASRI Tuban, diharapkan pada tenaga kesehatan khususnya para bidan dapat menerapkan pijat oksitosin pada persalinan kala I yang mana akan memperlancar proses persalinan dan dapat mengurangi kejadian kematian ibu.
La sequía como desastre de origen Hídrico; un estudio de caso de Oroomieh Lake
Authors:   UNESCO Regional Centre on Urban Water Management-Tehran, Irán, Homayoun Motiee , Alireza Salamat ,   UNESCO Regional Centre on Urban Water Management-Tehran, Irán, Mc Bean Edward E. ,   College of Physical and Engineering Science, University of Guelph, Canada
Published: March 2021

La sequía es un fenómeno normal	que ocurre en varios tipos de clima, siendo más significativa en las regiones áridas, tales como las del Medio Oriente asiático donde es probable que exista una tendencia a una mayor recurrencia en el futuro, con mayor frecuencia e intensidad. Si bien la sequía es un fenómeno que existente desde hace ya mucho tiempo, su manejo resta todavía de ser el óptimo, debido, en gran parte, a la forma en que generalmente se percibe la misma y a la mala interpretación de los expertos y responsables políticos. No obstante, durante los últimos años, ha habido un gran progreso, apreciándose un cambio significativo en la errónea percepción de considerar a la sequía como un fenómeno de alarma, para incorporar el concepto de planificar a largo plazo para una gestión eficiente. De todas formas, se requieren aún mayores esfuerzos para elaborar e implementar planes de mitigación de sequías, para lo cual la mayoría de los países necesitan aún un gran apoyo a fin de reducir su vulnerabilidad así como para aumentar su capacidad para combatir sus efectos adversos. La gestión del agua en las regiones áridas y semiáridas está enfrentando una crisis. La falta de agua en las regiones con escasez crónica puede conducir a la migración masiva de personas causando problemas sociales y políticos. La sequía es un desastre natural vinculado al clima, un riesgo peligroso de la naturaleza que se relaciona a una deficiencia de precipitación durante un período prolongado de tiempo, por lo general durante una temporada o más. Tiene un impacto en la producción de alimentos, reduce la esperanza de vida y el desempeño económico de grandes regiones o incluso de países enteros.
INTEGRATING INDIGENOUS SOCIO-CULTURAL FORMS IN ENVIRONMENTAL ADULT EDUCATION FOR CONFLICT RESOLUTION BETWEEN PASTORAL NOMADS AND HOST COMMUNITIES IN NIGERIA
Authors: EZEALA J. I. , FESTUS MBALISI ONYEKA 
Published: March 2021

Conflict between pastoral nomads and host communities in Nigeria today have resulted in the degradation of the environment, and the impoverishment of the host communities. This has occasioned banditry, criminality and even armed insurgency by nomads and host communities. Strategies identified by government and researchers geared towards resolving the conflict and ensuring peaceful co-existence between farmers and herders have not helped to a large extent. Such strategies include among others, establishment of cattle colony in the federating states, establishment of the Commissions of Enquiry, and deployment of securities, environmental dialogue, environmental communication, environmental mediation, regular environmental sensitization meetings. In spite of the above-mentioned strategies, the conflict still persisted. This paper explored some of the indigenous socio-cultural forms which can be integrated in environmental adult education for forestalling conflict between pastoral nomads and their host communities in Nigeria. The paper concludes that since environmental adult education thrives on the experience of the participants derivable from their value systems which brings to bear in learning, efforts should be made to utilize these sociocultural forms which embody peoples’ values systems in mobilizing and educating herders and farmers on the need for peaceful co-existence.
SISTEM PENDUKUNG KEPUTUSAN APLIKASI PEMILIHAN GAME ANDROID UNTUK ANAK USIA DINI
Authors: Mu'alimin Miftahul , Latipah  
Published: March 2021

Abstrak - Bermain game tidak hanya mendapatkan kesenangan semata namun dapat dipakai sebagai salah satu metode untuk pembentukan karakter, dan pembelajaran anak usia dini. Perkembangan game saat ini memang sangat pesat, berawal dari game konsol seperti (Game boy, SEGA, PS 1, PS 2, Xbox 360), hingga muncul game dengan sistem android. Banyaknya game yang beredar pada masyarakat menimbulkan masalah, terutama dalam pemilihan game dengan kriteria dan kebutuhan yang tepat untuk anak usia dini. Pemilihan sebuah game untuk anak usia dini dapat dilihat dari spesifikasi, jumlah pemain, harga, dan jenis gamenya. Mengkombinasikan semua hal tersebut bukanlah hal yang mudah, apalagi banyaknya game yang muncul saat ini membutuhkan waktu yang lama untuk menemukan game yang sesuai. Perancangan aplikasi Sistem Pendukung Keputusan (SPK) pemilihan game android untuk anak usia dini ini menggunakan metode Technique for Order Preference by Similiarty to Ideal Solution (TOPSIS) berdasarkan beberapa kriteria yaitu rating game, tanggal rilis, jumlah download, harga item termurah, dan ukuran download. Aplikasi yang dirancang bertujuan untuk membantu pemain memilih game dengan tepat dan cepat. Hasil rancangan aplikasi ini diharapkan dapat membantu para pengguna khususnya orang tua untuk memilih game terbaik untuk anak-anak mereka. Diharapkan hasil rancangan ini kemudian akan dilanjutkan dengan membangun aplikasi SPK sehingga dapat bermanfaat untuk para pencinta game

Kata kunci : Anak, android, game, SPK, Topsis.
SISTEM PENDUKUNG KEPUTUSAN PEMILIHAN SUPPLIER KAIN DENGAN METODE MOORA
Authors: Proboningrum Sandyea , Acihmah Sidauruk  
Published: March 2021

Abstrak - Sistem pendukung merupakan cara yang dapat digunakan untuk membantu seseorang maupun perusahaan dalam mengambil keputusan. Salah satunya yaitu pengambilan keputusan dalam pemilihan supplier kain. Pemilihan supplier merupakan salah satu bagian terpenting dalam suatu usaha. Untuk mendapatkan hasil yang maksimal, dibutuhkan supplier yang terbaik dan berkualitas. Karena banyaknya supplier kain, Yani kain kesulitan dalam memilih supplier dengan kelebihannya masing-masing. Metode yang digunakan dalam pengambilan keputusan supplier kain pada Yani kain adalah dengan menggunakan metode Multi-Objective Optimazion on the basis of Ratio Analysisi (MOORA). Pada penelitian ini terdapat 5 kriteria yang ada, yaitu desain, harga, kualitas, pengiriman dan pelayanan. Setelah dilakukan perhitungan terhadap 30 sample data supplier, dilakukan pengujian menggunakan confusion matrix dengan hasil akurasi sebesar 80%. Untuk implementasi aplikasi dibangun berbasis web.

Kata kunci : MOORA, Sistem Pendukung Keputusan, Supplier, Web, Confusion Matrix.
Pemberian Motivasi Melalui Media Pembelajaran Flashcard Bagi Anak Berkesulitan Belajar (Learning Difficult)
Authors: Nurcahyawati Enny , Iswari Fitria , - Syahid 
Published: March 2021

Kegiatan belajar mengajar di sekolah umumnya ditunjukkan hanya kepada siswa yang berkemampuan rata-rata, dan bagi siswa yang punyai kemampuan lebih atau yang berkemampuan kurang biasanya terabaikan. Dan kenyataan yang terjadi didunia pendidikan siswa kategori sangat pandai dan kurang pandai, sedikit mendapat kesempatan yang layak untuk berkembang sesuai dengan kemampuannya. Maka dari sini lah, kemudian timbul apa yang disebut kesulitan belajar (learning difficult). Pembelajaran yang mudah diterima oleh anak berkesulitan belajar adalah dengan menggunakan media pembelajaran. Media belajaran yang efektif dengan menggunakan media flashcard, Karena Media flashcard mempunyai karakteristik yang menyajikan informasi pendek pada setiap kartunya. Misalnya tau dengan mudarah huruf, angka, nama binatang, mengenal buah dan lain sebagainya. Informasi pendek sangat memudahkan siswa mempunyai masalah kesulitan belajar. Metode belajar ini lah yang amat mudah diterapkan, selain mudah tentunya menggembirakan, dan akhirnya mempengaruhi siswa dalam menyerap materi-materi yang disampaikan oleh guru. Seyogya seorang guru harus mempunyai banyak metode yang bervariasi dan menyenangkan dalam memberikan materi setiap mata pelajaran.