bluuebunny/crossref_metadata_2025_split huggingface dataset:
Study on prediction model of coalbed methane extraction production in goaf of Yuecheng Mine
Authors: Wang Ran , Dai Linchao , Jiang Wangang 
Published: May 2021

Abstract
A large number of mined-out areas are formed in the production of coal mines, which contain rich coalbed methane resources. If the coalbed methane resources in the mined-out areas are allowed to escape into the atmosphere, it will not only cause a waste of resources, but also pollute the environment and affect the underground production safety. Therefore, it is of great significance to the utilization of coalbed methane resources in the mined-out areas. However, due to the complex environment of mined-out area, the research on the prediction of coal bed methane extraction production in mined-out area has been few, and the coal bed methane extraction amount in mined-out area has a large randomness, so it can not be accurately predicted. Therefore, according to the actual pumping situation of YCCD-02 well in Yuecheng Mine, combined with the pumping curve of surface well, the prediction model of coalbed methane pumping production in goaf was calculated, and the accuracy was verified by the evaluation results of goaf resources.
Discussion on casing damage situation and prevention methods in a block
Authors: Zhang Dandan 
Published: May 2021

Abstract
With the development of A oilfield and the constant adjustment of water injection scheme, affected by geological, engineering and development factors, the casing of oil and water wells will be damaged to varying degrees. Casing damage not only leads to the normal production of this well, but also needs to invest a lot of money for overhaul and renewal. At the same time, it will destroy the original injection-production system in this area and accelerate the production decline. Therefore, it is of great significance to study the causes of casing damage and its prevention technology for preventing casing damage and improving injection-production relationship. In this paper, a fault block in A oilfield is taken as the research object. By analyzing the present situation of casing damage in this block and the distribution law of casing damage wells in plane and longitudinal direction, combining with lithology and pressure conditions, the causes of casing damage are analyzed, and finally the countermeasures are put forward to improve the oilfield development effect and ensure the sustainable development of A oilfield.
Study on oil-water distribution law of Saertu reservoir in T66 block of Aogula oilfield
Authors: Zhao Yue 
Published: May 2021

Abstract
T66 block of Aogula Oilfield is a block structure area, in which faults are relatively developed, with different oil-water systems in different fault blocks, obvious oil-water interbedding phenomenon in longitudinal direction, no unified oil-water interface and complex oil-water distribution. In order to solve this problem, the oil-water layer identification and oil-water distribution law of reservoirs in this area are studied by using drilling data and resistivity correction model, and the oil-water interpretation chart is established. The analysis shows that the whole area is controlled by fault-structure, and the oil-water difference between the two sides of the fault is large, which is obviously blocked by the fault, and the fault cutting controls the oil-water distribution Local fault blocks are controlled by structure-lithology, and the whole reservoir of high fault blocks is well developed, showing the characteristics of high oil and low water, while the reservoir of low fault blocks is discontinuous, showing the characteristics of lithologic upward dip and pinchout and lens controlling oil and water.
Analysis of measures to improve the technical level of late development of high water cut oilfield
Authors: Liu Xiaona 
Published: May 2021

Abstract
Oilfield exploitation has the characteristics of bad environment and complex construction. Under the background of changing oil reserves and structure, how to use advanced exploitation technology to ensure the development direction of Oilfield on the basis of gradually improving oil recovery is an important problem faced by oilfield enterprises. Therefore, the oilfield in the late stage of high water cut must improve the ability of technical personnel In order to ensure the long-term high efficiency and stable production of the oilfield, we should adopt advanced production technology, tap the potential of remaining oil in the later stage of oilfield development, control the production decline and water cut rising speed.
Research on Sand Body Description and Perforation Plan Optimization of Off-surface Reservoir in Block a of X Oilfield
Authors: Zhang Yuanyuan 
Published: May 2021

Abstract
Based on the previous understanding of off-surface reservoirs of closed coring wells in Block B of X Oilfield, this paper selects the “four injection and nine production” test well group in Block A as the research object, and studies the distribution characteristics of dominant bands in off-surface sand bodies. The results show that the off-balance-sheet reservoirs can be vertically subdivided into two types and seven sub-types of sand body connectivity patterns, and the understanding of sand body connectivity is deepened by finely depicting sedimentary facies belts on the plane. On the basis of the above research, according to the sedimentary environment and distribution characteristics of the dominant zones, the perforation scheme of the tertiary infill wells is further optimized, and the three principles of “no shooting in the inner front, type I and II selective shooting in the outer front, and type III and IV full shooting in the outer front” are defined, which provides a new research direction for effectively controlling the rapid rise of water cut in the initial stage of new wells and further tapping the potential of the off surface remaining oil.
Application effect analysis of fracture net fracturing technology in a certain block
Authors: Wang Shuang 
Published: May 2021

Abstract
During the development of a certain block in Chaoyanggou Oilfield, there are many contradictions, such as high water injection pressure and fast rising speed, difficult to establish effective displacement of oil and water wells, poor oil well efficiency, difficult to establish effective displacement by conventional fracturing and water injection development, low single well output after fracturing and poor effect of measures. In view of these problems, we conducted fracture network fracturing test in a certain block to explore effective measures to improve single well production in low permeability reservoirs, in order to provide reference for future measures to tap potential and increase efficiency.
Fracture propagation simulation and construction parameter optimization of eruptive phase volcanic rock
Authors: Zhou Changlin , Zhou Lang , Zhang Huali , Li Li , Wang Rui , Jing Ming , Zeng Rong 
Published: May 2021

Abstract
A large number of volcanic gas reservoirs are developed in the Sichuan Basin. Up to now, 92 wells have been drilled into Permian volcanic rock, which have good prospects for exploration. Among them, large areas of volcanic facies are distributed in the Sichuan Basin. The uneven distribution of pores in volcanic rocks of eruptive facies and the large difference in rock mechanics combination between different lithofacies make it difficult to develop volcanic gas reservoirs of eruptive facies effectively. Therefore, studying the characteristics of eruptive facies volcanic rocks and reservoir reconstruction schemes is very important for the later development of volcanic rocks Significantly, this paper builds a finite element model of a volcanic rock reservoir of the effusion facies based on the geological characteristics of the volcanic rock of the effusion facies, and optimizes the construction parameters in terms of construction displacement, fracturing fluid volume, and proppant. The research results show that, the injection pressure of the spouting phase under different stress difference conditions exhibits oscillating characteristics. The stress difference between the barrier and the reservoir is positively related to the injection point pressure and fracture fracturing. The recommended construction displacement is 4.5-5.5m3/min and the fracturing fluid dosage is 400-500m3, and the amount of proppant is between 30-40m3. The research content of this article is of great significance for the effective development of volcanic gas reservoirs in eruptive facies.
Prediction Method of TOC Content in Mudstone Based on Artificial Neural Network
Authors: Liu Dongxu 
Published: May 2021

Abstract
Total organic carbon (TOC) content prediction is an important index for evaluating geochemical characteristics of source rocks. Although the methods based on multiple regression and shale content index classification regression can predict TOC content of mudstone in different layers, the models are relatively simple and the results are not accurate. In this paper, the prediction method of artificial neural network is used to predict TOC content of Neogene source rocks in Liping area, Qaidam Basin. The results show that: (1) the correlation between TOC prediction curve and parameters of logging curve is significant; (2) the TOC prediction curve has obvious fluctuation, reflecting the strong heterogeneity of the stratigraphic organic matter; (3) the predicted TOC value is closer to the measured value. Using this method to predict TOC content can be widely used for oil and gas exploration and development in future.
Analysis of potential tapping and efficiency increasing measures of reservoir measures in late stage of oilfield development
Authors: Liang Chen , Gao Liqun , Liang Wang , Lei Yang , Zan Wei , Feng Li , Ma Zihan 
Published: May 2021

Abstract
In the process of oilfield development, with the continuous development of resource exploitation and oil transportation, the later exploitation is likely to reduce the potential energy of the oilfield, which has a serious impact on the oil exploitation. In order to make our oilfield development efficiency has been significantly improved, and effectively improve the comprehensive development and utilization efficiency of our oilfield, we must continue to use the oilfield potential enhancement technology. In the actual production process, we need to combine a variety of technologies, such as hydraulic transmission pressure fracture, water plugging, acidification and other technologies. Through the comprehensive utilization of these technologies, we can reduce the water content of comprehensive oil wells in the oilfield, effectively improve the production of the oilfield, bring greater economic benefits to the society, and promote the long-term, stable and healthy development of China’s oilfield.
Experimental Study on Gas Extraction Effect of Conventional Drilling in Coal Mining Face
Authors: Zhang Di , Yao Zhuangzhuang , Zhao Meicheng 
Published: May 2021

Abstract
In order to study the effect of conventional drilling gas extraction technology, combined with the observation results of upward drilling and downlink drilling field test in 81309 working face of Baode Mine. The analysis of field test data shows that under the same gas control effect, the average gas concentration and gas purity of uplink drilling are higher than that of downlink boreholes. In the extraction range, the average pumping concentration of uplink boreholes is 1.134 times higher than that of downlink boreholes, while the average pure gas flow rate of uplink boreholes is 1.296 times higher than that of downlink boreholes. The test results show that the uplink conventional drill Hole has better pumping concentration stability and extraction effect than downlink conventional drilling.
Research on Interwell Detection Based on Pseudo Random Electromagnetic Method
Authors: Li Dawei , Luo Lintao , Gao Qingnan , Sun Huafeng 
Published: May 2021

Abstract
At present, a large amount of oil reserves exist in underground oil reservoirs in the form of remaining oil. Therefore, to improve oil recovery, it is necessary to increase the recovery rate of remaining oil, and the well is a main area of remaining oil, so the detection of interwell reservoirs is of great significance. In view of this, this article first gives the general plan of the pseudo-random electromagnetic method for cross-well exploration, and analyzes the principle of the pseudo-random signal correlation identification technology based on the Wiener-He Fu equation; secondly, analyzes the common pseudo-random sequence Characteristics; again, based on the use of line source theory, a cross-well detection model is established, and the feasibility of the built model is verified; then the conductivity changes, buried depth changes and thickness changes of anomalous bodies are used for non-uniform wells. The influence of the electric potential distribution of the probe model; finally, the difference of each impulse response is analyzed.
Determination of available phosphorus in alkaline soil by molybdenum blue spectrophotometry
Authors: Lin Xue , Zhang Jingyu , Chen Hong , Han Lu 
Published: May 2021

Abstract
A rapid and accurate method for the determination of available phosphorus in alkaline soil by molybdenum blue spectrophotometry was established. The alkaline soil samples were extracted by Olsen method. The effects of absorption wavelength, amount of chromogenic agent, amount of reducing agent and colour reaction time on the determination results were investigated. The results showed that the optimal conditions were as follows: the maximum absorption wavelength was 700 nm, the amount of chromogenic agent was 1 mL, the amount of reducing agent was 1 mL, and the colour reaction time was 15 min. The linear range of phosphorus concentration was 0.3 μg/mL ~ 1.8 μg/mL, and the recoveries ranged from 88.67 % to 92.17 %. The method is simple, sensitive and accurate.
Analysis of Influencing Factors and Evolution Law of Surface Anti-slide Performance of SMA-13 Based on Expressway Physical Engineering
Authors: Zhu Yongqiang , Wu Shaoming , Liu Feng , Xu Xinquan 
Published: May 2021

Abstract
Relying on the physical projects of Guangdong Province Chaohui expressway, Wushen expressway Renbo Section and Foqingcong expressway, based on asphalt and asphalt mixture test and on-site SFC test detection, through mathematical statistics, the factors affecting the skid resistance of SMA-13 asphalt mixture are obtained. At the same time, based on the observation of anti-skid performance of SMA-13 asphalt pavement from one year after construction to one year after opening to traffic, the change law of anti-skid performance of SMA-13 asphalt pavement from post-construction, temporary pass, acceptance and opening to traffic is obtained. The research results show that factors such as asphalt binder, mineral aggregate synthesis gradation, different oil-stone ratios and aggregate processing technology are possible factors that affect the anti-skid performance of SMA-13. The early anti-skid performance of SMA-13 asphalt pavement usually cannot meet the acceptance standard of SFC=54. However, the SMA pavement after construction can be spread with 3∼5mm gravel to improve its early anti-skid performance, and the on-site treatment effect is better.
Study Characteristics of Asphalt Concrete Lapis Aus (HRS-WC) By Using Sand Pumice For Material Substitute
Authors: Rizal M , Darwis M , Ridwan I 
Published: May 2021

Abstract
Tidore Islands has the potential of natural resources in the form of the availability of plenty of floating sand. This study was conducted to determine the effect of the use of floating sand as a substitute for sand on the characteristics of asphalt concrete mix wear (HRS-WC). This study uses the methods of The Asphalt Institute, Indonesian National Standards (SNI), and General Specifications 2018-Section 6.3. Percentage variation used in replacement material is 15% of normal sand: quicksand 15%, normal sand 7.5% : 7.5% quicksand, normal sand 11.25% : 3.75% quicksand and sand floating 11.25% : normal sand 3.75%. For find out the Marshall characteristics of the HRS – WC (Hot Rolled Sheet-wearing course) mixture by using a substitute for floating sand aggregate. Results of testing marshall with sand floating 11.25% sand normally 3.75% indicates the value of the stability of the highest = 1361.43 on levels of bitumen 6%, sand normal 15% to the value of the stability of the highest = 1408.6 at the level of asphalt 5.5%, the highest stability value = 1435.9 at 7% asphalt content, the highest stability value = 1472.2 at 6.5% asphalt content, and the highest stability value = 1687.8 at 6% asphalt content. And the average value of stability is 1473,19.
Feasibility Study of Micro Hydro Power Plant in Oboi River, Tutuling Village, East Halmahera Regency
Authors: Misbah Z K , Rizal M , Sahril R S M 
Published: May 2021

Abstract
Restricted electricity is one of the resistors in improving development and empowering communities, especially in rural areas. The utilize of MHP as an alternative energy because its cost friendly, user friendly, environmentally friendly, and material friendly. Those are expected to be the proper solutions to overcome inadequate accessibility of rural communities, such as in Tutuling village, East Halmahera Regency. This study uses the frequency distribution method and is tested using a probability test to calculate rainfalls. The buoy method for calculating river discharge and Rational method for calculating flood discharge known as Flow Characteristicto calculate the mainstay discharge while Geometric Method aims to calculate the Projection of Population Amount. Based on the results of the research and analysis of calculations on the Feasibility Study of Potential Micro Hydro Power Plants in the Oboi River. It can be concluded that the river discharge available at MHP in Tutuling Village Q river = 2,3171 m3/sec with reliable discharge Q reliability = 2.2545 m3/sec and effective fall height (Head) H = 30 meters with the amount of power generated by Pnet = 219.2342 kW. The total number of houses that have been electrified is 894 houses. Moreover, finding how many houses that capable of being raised in the future for about 2 decades ahead is the ultimate aim of this research. As a result, the calculated population is projected to address the number of households (houses), which likely to electrified for over 20 years to come is approximately 661 households.
Porosity Analysis and Compressive Strength of Normal Concrete with Synthetic Wood Waste Filler Additives
Authors: Kartini Wahyu , Sumaidi  
Published: May 2021

Abstract
To improve the quality of normal concrete often used additional materials such as fillers, to reduce the cavities in the concrete (porosity). Fillers can fill pores in concrete due to gaps from aggregates, if the empty space is reduced, the compressive strength value of the concrete will increase because the cavities in the concrete can result in cracks during loading. The filler used is synthetic wood waste from PT Dominic NISI which makes multiboard from cement. Synthetic wood fillers are not reactive with water, because the silica content in this filler comes from cement which has been reactive when making synthetic wood, therefore this filler is only as a filler in concrete. The optimal value of porosity testing was 9.774% with variations in the addition of 15% synthetic wood waste filler, has decreased porosity by 7.914% compared to concrete without synthetic wood waste filler. While the optimal value of compressive strength with the addition of synthetic wood waste filler at 10% variation of 41.594 Mpa, an increase of 27.09% compared to concrete without synthetic wood waste filler.
Decision Support System for Departemen Selection for Prospective Students using the Naïve Bayes Method and Analytical Hierarchy Process Model at Faculty of Engineering Universitas Musamus
Authors: Zubaedah R , Lintang M , Pratama Putra Nasra 
Published: May 2021

AbstractFor prospective new students often feel confused in choosing majors to continue their education at the University. The faculty of engineering is one of the favorite faculties for prospective students but sometimes most feel confused choosing what majors are in accordance with their academic abilities, so that the selection of majors often follows the choice of their closest friends or their parents’ choices. The selection of inappropriate majors will affect the future of the prospective new student. For this reason, prospective new students must know their academic abilities and interests. With a decision support system for determining majors, it is hoped that it can help prospective new students to find out the greatest potential of the choice of majors in accordance with their academic abilities and talents. Decision Support Systems made implementing the Naïve Bayes method to find out which prospective new students can potentially enter one of the departments in the technical faculty other than that the use of the Analytic Hierarchy Process model is used to find out the right choice of majors. The Naïve Bayes method refers to the rules for admitting new prospective students, which will obtain the probability formula yes and the probability formula no, to be used in calculations with data samples. The AHP model refers to the value of subjects that are tested or tested on the admission test for prospective new students. Calculations using Naïve Bayes for student data samples for the 2019-2020 school year, using 10 sample data on prospective students, obtained 3 students who did not enter the department of engineering or have no academic potential to enter the department of engineering. While other students who entered were calculated using the AHP Model, and obtained 1 student whose majors were not appropriate. While other students have chosen the right majors according to their academic abilities. In the end this Decision Support System can be used to find out which potential new students are potential and who have no potential and can also provide recommendations for the selection of the right majors in accordance with the academic abilities of prospective new students.
One Line Soft Keyboard with T9-keys Layout Proposal on Smartwatch Touch Screen Device
Authors: Mandyartha Eka Prakarsa , Atmaja Pratama Wirya , Wahanani Henni Endah , Swari Made Hanindia Prami 
Published: May 2021

Abstract
A smartwatch is a mini-sized digital computer device that functions apart from being a watch and can also perform intelligent computing tasks. Due to screen size limitations, a smartwatch requires special design techniques on its input and output to allow interaction with its users. Text entry is often required by many applications, but because the smartwatch screen is small, text entry techniques commonly used on personal computers are impractical when applied to smartwatches. In this study, we introduce a design concept proposal for a soft keyboard called One Line Soft Keyboard with T9-Keys Layout. The soft keyboard design concept is expected to reduce the space on the keyboard on the smartwatch screen, along with the use of widely used button layouts that are familiar to users.