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Coal-wall spalling prevention mechanism using advance-grooving pressure relief in the large-mining-height working face of a shallow coal seam 浅煤层大采高工作面采用超前开槽卸压防止煤壁剥落的机制
IF 3.5 3区 工程技术
Energy Science & Engineering Pub Date : 2024-10-18 DOI: 10.1002/ese3.1946
Wang Hongwei, Feng Li, Zhao Zhouyan, Li Yanjun, Cao Peipei, Jiao Jianqiang, Jiang Baolin, Liu Yong
{"title":"Coal-wall spalling prevention mechanism using advance-grooving pressure relief in the large-mining-height working face of a shallow coal seam","authors":"Wang Hongwei,&nbsp;Feng Li,&nbsp;Zhao Zhouyan,&nbsp;Li Yanjun,&nbsp;Cao Peipei,&nbsp;Jiao Jianqiang,&nbsp;Jiang Baolin,&nbsp;Liu Yong","doi":"10.1002/ese3.1946","DOIUrl":"https://doi.org/10.1002/ese3.1946","url":null,"abstract":"<p>In mining, the roof structure of a working face with a large mining height in a shallow-buried coal seam is prone to cutting instability in front of the support, which causes support crushing and coal-wall spalling. This study analyzes 2201 working faces with large mining heights in the Haiwan No. 3 Mine by investigating the mechanical response law of coal walls under the transient excitation of roof structure instability. A mechanical model of coal walls under dynamic and static load coupling is established, revealing the formation mechanism of coal wall spalling and its main influencing factors. Prevention and control technologies of advanced grooving and pressure relief are proposed, and grooving parameters are determined. The results show that: During the mining process of large mining height working face in shallow buried coal seam, the step change of static response of coal wall is induced by the transient instability of roof structure, and the high abutment pressure is formed on the coal wall. At the same time, the strain energy and gravitational potential energy of roof cutting instability are released to form a dynamic load. Under the action of dynamic and static load, the plastic failure dissipation power of the coal wall is greater than the critical power, and the coal wall spalling occurs. The main influencing factors are mining load, mining height, and internal friction angle of the coal wall. The method of advanced grooving pressure relief can change the roof structure and coal force mechanism, by cutting off the connection between the coal wall and immediate roof, reducing the height of the coal wall force, effectively controlling the position of the roof cut off break line, reducing the static load effect of the roof on the coal, and transferring the position of the dynamic load response to the depth of the coal wall. When the grooving height-depth ratio <i>k</i> is 0.75, the peak value of the abutment pressure moves 5.57 m to the front of the working face, and the pressure relief effect is the best. The above research results provide an effective active protection method for controlling coal wall spalling in fully mechanised working face with large mining height.</p>","PeriodicalId":11673,"journal":{"name":"Energy Science & Engineering","volume":"12 11","pages":"5105-5118"},"PeriodicalIF":3.5,"publicationDate":"2024-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/ese3.1946","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142707693","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Experimental analysis of an agricultural diesel engine powered with biogas as green fuel from waste canteen food 利用食堂废弃食物中的沼气作为绿色燃料驱动农用柴油发动机的实验分析
IF 3.5 3区 工程技术
Energy Science & Engineering Pub Date : 2024-10-16 DOI: 10.1002/ese3.1936
Kapura Tudu, Debabrata Barik, Sreejesh S. R. Chandran, Prabhu Paramasivam, Jasgurpreet Singh Chohan
{"title":"Experimental analysis of an agricultural diesel engine powered with biogas as green fuel from waste canteen food","authors":"Kapura Tudu,&nbsp;Debabrata Barik,&nbsp;Sreejesh S. R. Chandran,&nbsp;Prabhu Paramasivam,&nbsp;Jasgurpreet Singh Chohan","doi":"10.1002/ese3.1936","DOIUrl":"https://doi.org/10.1002/ese3.1936","url":null,"abstract":"<p>This proposed study aims to characterize and utilize the biogas (BG) derived from the anaerobic co-digestion of university hostel food waste and Vinasse (waste from the sugarcane industry) in a digester and to run an agricultural diesel engine with BG and <i>Jatropha Curcas</i> methyl ester (JCMS) on a dual fuel (DF) mode. In DF mode, BG from food waste was the main fuel, and JCMS100 was the pilot (secondary) fuel. The engine was run at different BG flow rates as 4, 8, and 12 liters per minute (LPM) with JCMS100 as injected fuel. As per the author's earlier experimental findings, the fuel injection pressure for the JCMS100 was elevated to 240 bar from the base range of 200 bar to enhance the engine performance. The experimental findings for the JCMS, and BG operation were compared with diesel in all aspects. It was revealed that the NOx emission of JCMS100 + 12 LPM of BG was about 7.5% lower than the D100 fuel at full load. Increasing BG intake up to 8 LPM, the BTE increased, however, afterward it started to decline. In a similar consequence, the brake specific fuel consumption (BSFC) declined up to 8 LPM of BG, however, when the engine was fed with 12 LPM of BG the BSFC started to elevate. The carbon monoxide and hydrocarbon also elevated with higher induction of BG. However, interestingly a NOx-smoke compromised tradeoff was observed for JCME-BG operation.</p>","PeriodicalId":11673,"journal":{"name":"Energy Science & Engineering","volume":"12 11","pages":"5145-5159"},"PeriodicalIF":3.5,"publicationDate":"2024-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/ese3.1936","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142707940","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Research on mechanism and practice of expansion-induced fracturing and pressure relief in deep coal mines 深部煤矿膨胀诱导压裂降压机理与实践研究
IF 3.5 3区 工程技术
Energy Science & Engineering Pub Date : 2024-10-16 DOI: 10.1002/ese3.1941
Shitan Gu, Zhiyao Liu, Wenshuai Li, Bangyou Jiang, Changpeng Chen
{"title":"Research on mechanism and practice of expansion-induced fracturing and pressure relief in deep coal mines","authors":"Shitan Gu,&nbsp;Zhiyao Liu,&nbsp;Wenshuai Li,&nbsp;Bangyou Jiang,&nbsp;Changpeng Chen","doi":"10.1002/ese3.1941","DOIUrl":"https://doi.org/10.1002/ese3.1941","url":null,"abstract":"<p>A nonexplosive expansion method is proposed to apply in the field of rock burst prevention and control in coal mine. The principle of the expansive agent reaction was analysed and specimens with one hole and two holes were tested with and without axial stress or an expansive agent. The results showed that the reaction products of the expansive agent exhibited excellent fluidity and did not induce secondary stress concentration within the specimens. The specimens with two holes exhibited more severe and intricate fractures upon introduction of the expansive agent, and the formation of crisscross networks of cracks occurred in both the horizontal and vertical directions. Stress concentration became more pronounced as the distance between the two holes decreased, making the specimen more vulnerable to cracking. A field test was conducted to evaluate the effectiveness of pressure relief through expansion-induced fracturing in the roadway of 1318 working face. The results from the field test demonstrated that the quantity of coal powder in the deep area significantly decreased after expansion-induced fracturing and fell well below the early warning index of the drilling cutting method.</p>","PeriodicalId":11673,"journal":{"name":"Energy Science & Engineering","volume":"12 11","pages":"5230-5244"},"PeriodicalIF":3.5,"publicationDate":"2024-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/ese3.1941","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142707942","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Investigation of motion response suppression characteristics in floating platforms equipped with novel spiral side plates 配备新型螺旋侧板的浮式平台运动响应抑制特性研究
IF 3.5 3区 工程技术
Energy Science & Engineering Pub Date : 2024-10-15 DOI: 10.1002/ese3.1939
Yu Jing-mei, Bai Chun-long
{"title":"Investigation of motion response suppression characteristics in floating platforms equipped with novel spiral side plates","authors":"Yu Jing-mei,&nbsp;Bai Chun-long","doi":"10.1002/ese3.1939","DOIUrl":"https://doi.org/10.1002/ese3.1939","url":null,"abstract":"<p>To enhance the stability of floating wind turbine platforms, this study combines the structural characteristics of helical side plates and proposes the installation of serrated helical side plates on Spar wind turbine platforms. Based on potential flow theory, the present study employs blade element momentum theory and radiation-diffraction theory. Upon establishing a dynamic data link library, wind-wave coupling was implemented, and the dynamic response characteristics of platforms with different helical side plates were compared. The results indicate that in the frequency domain analysis, the platform with serrated helical side plates demonstrates reduced sensitivity to waves, with a particularly notable increase in added mass in the heave direction, suggesting excellent hydrodynamic performance. In the time domain analysis, improvements in the platform's surge and heave stability performances were observed, measuring 10.99% and 10.64%, respectively, in extreme conditions. Owing to the unique features of the serrated structure, the tension in the mooring chains on the wave-facing side is reduced, thereby effectively lowering the fatigue load on the mooring chains.</p>","PeriodicalId":11673,"journal":{"name":"Energy Science & Engineering","volume":"12 11","pages":"5160-5170"},"PeriodicalIF":3.5,"publicationDate":"2024-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/ese3.1939","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142707806","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Experimental study on the utilization of Fly ash solid waste in tunnel shotcrete materials 在隧道喷射混凝土材料中利用粉煤灰固体废弃物的试验研究
IF 3.5 3区 工程技术
Energy Science & Engineering Pub Date : 2024-10-15 DOI: 10.1002/ese3.1917
Zan Juncai, Ren Wanxing, Guo Qing
{"title":"Experimental study on the utilization of Fly ash solid waste in tunnel shotcrete materials","authors":"Zan Juncai,&nbsp;Ren Wanxing,&nbsp;Guo Qing","doi":"10.1002/ese3.1917","DOIUrl":"https://doi.org/10.1002/ese3.1917","url":null,"abstract":"<p>Fly ash has emerged as a prominent solid waste in China, leading to various environmental concerns and posing a threat to the health of living organisms, including humans. To enhance the industrial applicability of this waste material, a novel approach has been proposed wherein sand is replaced with fly ash as the primary raw material for wall grouting of coal mine roadways. To address the issue of low compressive strength and to improve the properties of fly ash shotcrete materials, a method employing an alkali activator to stimulate the chemical activity of fly ash has been put forward. The long-term effectiveness of the shotcrete material has been evaluated using compressive strength testing and scanning electron microscopy testing methods. The impact of replacing sand with fly ash on the compressive strength of shotcrete and the activation effect of sodium sulfate (Na<sub>2</sub>SO<sub>4</sub>), NaOH, and Na<sub>2</sub>SiO<sub>3</sub> on fly ash shotcrete have been studied. The results indicate that the compressive strength of fly ash shotcrete shows optimal improvement when the content of Na<sub>2</sub>SO<sub>4</sub> is 3%. The ideal ratio of cement to fly ash is 1:3. Therefore, incorporating an appropriate amount of alkaline activator could effectively address the compressive strength issues of fly ash shotcrete materials.</p>","PeriodicalId":11673,"journal":{"name":"Energy Science & Engineering","volume":"12 10","pages":"4753-4762"},"PeriodicalIF":3.5,"publicationDate":"2024-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/ese3.1917","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142561664","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Numerical simulation of multiphase flow and prediction of sediment wear in a large Pelton turbine 大型 Pelton 水轮机中多相流的数值模拟和沉积物磨损预测
IF 3.5 3区 工程技术
Energy Science & Engineering Pub Date : 2024-10-14 DOI: 10.1002/ese3.1925
Mengjun Qin, Zhishun Yu, Baofu Wu, Jiayang Pang, Dengyun Jiang, Haiku Zhang, Jitao Liu, Hong Hua, Xiaobing Liu
{"title":"Numerical simulation of multiphase flow and prediction of sediment wear in a large Pelton turbine","authors":"Mengjun Qin,&nbsp;Zhishun Yu,&nbsp;Baofu Wu,&nbsp;Jiayang Pang,&nbsp;Dengyun Jiang,&nbsp;Haiku Zhang,&nbsp;Jitao Liu,&nbsp;Hong Hua,&nbsp;Xiaobing Liu","doi":"10.1002/ese3.1925","DOIUrl":"https://doi.org/10.1002/ese3.1925","url":null,"abstract":"<p>The problem of sediment wear presents a significant challenge for hydraulic turbines operating in sediment-rich rivers, particularly for high-head Pelton turbines. In this study, the VOF model, SST <i>k</i>–<i>ω</i> model, and DPM model were employed to simulate the gas–liquid–solid three-phase flow within a large Pelton turbine, which operates under a rated water head of 671 m and has a single capacity of 500 MW, at a hydropower station situated on a sediment-laden river. The sediment wear prediction model, derived from the sediment wear test of the model turbine, was utilized to forecast the sediment wear on the flow components of the Pelton turbine at the hydropower station. The results show that there are obvious pressure and velocity gradients near the nozzle outlet of the Pelton turbine in the power station, and the wear of the nozzle surface is gradually increasing, and the wear in the downstream area of the nozzle is more serious. The wear rate at the needle tip surface reached 1.372 μm/h, while the socket ring surface exhibited a wear rate of 3.175 μm/h. he highest wear rate recorded for the water bucket is 0.940 μm/h. After a year of continuous operation, the maximum erosion observed was 5.62 mm on the runner bucket made of stainless steel and wear-resistant metal, 8.23 mm on the spray needle, and 19.05 mm on the nozzle mouth ring, highlighting the severity of sediment wear on the Pelton turbine. It is recommended that surface treatment technology be applied to the flow-through components of the Pelton turbine at this hydropower station to enhance the wear resistance of the turbine and extend the operational life of the unit.</p>","PeriodicalId":11673,"journal":{"name":"Energy Science & Engineering","volume":"12 11","pages":"5031-5044"},"PeriodicalIF":3.5,"publicationDate":"2024-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/ese3.1925","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142707515","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Synergetic effect of iron and tungsten on molybdenum-doped HZSM-5 zeolite in catalytic methane dehydroaromatization 铁和钨对掺钼 HZSM-5 沸石催化甲烷脱氢芳构化的协同效应
IF 3.5 3区 工程技术
Energy Science & Engineering Pub Date : 2024-10-13 DOI: 10.1002/ese3.1919
Ronald. W. Musamali, Yusuf. M. Isa
{"title":"Synergetic effect of iron and tungsten on molybdenum-doped HZSM-5 zeolite in catalytic methane dehydroaromatization","authors":"Ronald. W. Musamali,&nbsp;Yusuf. M. Isa","doi":"10.1002/ese3.1919","DOIUrl":"https://doi.org/10.1002/ese3.1919","url":null,"abstract":"<p>Methane dehydroaromatization is a viable route for production of carbon and valuable petrochemicals. Unlike Fischer–Tropsch and methanol synthesis processes which have been scaled up to commercial level, development of methane dehydroaromatization to commercial level has been hampered by various challenges. In this work, a 5.4 wt. % trimetallic (Fe-W-Mo/HZSM-5) catalyst has been synthesized, characterized, and applied in catalytic methane dehydroaromatization reaction. A gas chromatograph was used to analyze both liquid and gaseous products from the reactor. Based on 0.0013 moles of reacted methane after 240 min time on stream at 750<span></span><math>\u0000 <semantics>\u0000 <mrow>\u0000 \u0000 <mrow>\u0000 <mi>°C</mi>\u0000 </mrow>\u0000 </mrow>\u0000 </semantics></math>, GHSV 960 mlg<sup>-1</sup>cath<sup>-1</sup>, and atmospheric pressure, a 5.4% Mo/HZSM-5 catalyst recorded 7.9% methane conversion, 10.6% C<sub>2</sub> hydrocarbon selectivity, 51.8% benzene selectivity, 9.8% toluene selectivity and 27.8% coke selectivity. Doping Mo/HZSM-5 with Fe reduced methane conversion by 4.0%, increased C<sub>2</sub> hydrocarbon selectivity by 1.7%, reduced benzene selectivity by 6.2% and increased toluene and coke selectivity by 1.8% and 2.8% respectively. Doping Mo/HZSM-5 with W increased methane conversion by 7.3%, reduced C<sub>2</sub> hydrocarbon selectivity by 2.1%, reduced benzene selectivity by 7.6% and increased toluene and coke selectivity by 0.3% and 9.4% respectively. When iron and tungsten were loaded onto Mo/HZSM-5, catalytic activity of the tri-metallic catalyst in methane conversion reduced by 2.0%, C<sub>2</sub> hydrocarbon selectivity increased by 2.7%, benzene selectivity reduced by 3.1%, toluene selectivity reduced by 3.7%, and coke selectivity increased by 4.1%. Therefore, this present work demonstrates that metal synergy in a tri-metallic catalyst plays a role in methane conversion and selectivity towards useful hydrocarbons.</p>","PeriodicalId":11673,"journal":{"name":"Energy Science & Engineering","volume":"12 11","pages":"5008-5018"},"PeriodicalIF":3.5,"publicationDate":"2024-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/ese3.1919","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142707636","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Mechanism and application of drill pipe bending induced borehole collapse in soft coal seam drilling 软煤层钻探中钻杆弯曲诱发井眼坍塌的机理及应用
IF 3.5 3区 工程技术
Energy Science & Engineering Pub Date : 2024-10-13 DOI: 10.1002/ese3.1921
Wang Yonglong, Yu Zaijiang, Guo Jiakuan, Du Kang, Ma Denghui, Zhao Aoqi
{"title":"Mechanism and application of drill pipe bending induced borehole collapse in soft coal seam drilling","authors":"Wang Yonglong,&nbsp;Yu Zaijiang,&nbsp;Guo Jiakuan,&nbsp;Du Kang,&nbsp;Ma Denghui,&nbsp;Zhao Aoqi","doi":"10.1002/ese3.1921","DOIUrl":"https://doi.org/10.1002/ese3.1921","url":null,"abstract":"<p>Gas extraction drilling is a necessary measure for managing gas hazards. For soft coal seams where gas extraction drilling holes are prone to collapse, it is believed that drill rod disturbance is the main cause of hole collapse. This study proposes a research approach to reduce wall stress by optimizing the drill rod structure. Through theoretical analysis, numerical simulation, and industrial tests, a stress model for the drill rod inside the hole was established, and a wall stress equation was derived. The effects of various parameters on wall stress were analyzed. The study suggests optimizing the drill rod structure to reduce the disturbance-induced wall stress. SolidWorks was used for drilling stress simulation, and a four-winged concave groove drill rod was developed. After strength verification, comparative industrial tests were conducted. The research results show that as the line density increases, the wall stress of the drilling hole increases. As the length of the suspended section increases, the wall stress initially decreases and then increases. With increasing drilling thrust, wall stress increases linearly, and the growth rate is greater with a larger diameter difference between the drill hole and the drill rod. Numerical simulation results indicate that the critical point maximum stress at the hole entrance, the critical point maximum stress at the hole bottom, and the average stress at the bottom section of the four-winged concave groove drill rod with a concavity of 5 are significantly reduced compared to those of circular and grooved drill rods. Industrial test results show that using the four-winged concave groove drill rod significantly reduces the extent of hole collapse. This study provides a reference for addressing the issue of hole collapse in gas extraction drilling for soft coal seams.</p>","PeriodicalId":11673,"journal":{"name":"Energy Science & Engineering","volume":"12 10","pages":"4763-4772"},"PeriodicalIF":3.5,"publicationDate":"2024-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/ese3.1921","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142561682","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Study on characteristics, efficiency, and variations of water flooding in different stages for low permeability oil sandstone 低渗透油砂岩不同阶段水浸的特点、效率和变化研究
IF 3.5 3区 工程技术
Energy Science & Engineering Pub Date : 2024-10-10 DOI: 10.1002/ese3.1942
Houjiang Fan, Xiaoqiang Liu, Gang Li, Xiang Li, Ahmed E. Radwan, Shuai Yin
{"title":"Study on characteristics, efficiency, and variations of water flooding in different stages for low permeability oil sandstone","authors":"Houjiang Fan,&nbsp;Xiaoqiang Liu,&nbsp;Gang Li,&nbsp;Xiang Li,&nbsp;Ahmed E. Radwan,&nbsp;Shuai Yin","doi":"10.1002/ese3.1942","DOIUrl":"https://doi.org/10.1002/ese3.1942","url":null,"abstract":"<p>Water flooding is an important way to improve recovery in low-permeability sandstone oil reservoirs. How to decouple the water flooding process using dynamic and static information is a hot topic. In this paper, taking the Paleocene low-permeability oil sandstone, BY area, eastern Nanxiang Basin as an example, the microscopic water flooding process in the low-permeability sandstone matrix was systematically investigated, and the characteristics of water channeling under the conditions of fracture existence were analyzed using the dynamic and static monitoring data. The results show that the target layer mainly develops frequently thin stacked composite sand bodies. Under the combined influence of matrix and fracture seepage, the low-permeability sandstone developed by water flooding shows that there is a single direction of efficiency. The direction of advantageous water advancement is 45° north–east, and the speed of water flooding advancement is 2.57 m/day. Microscopic water-drive oil experiments show that bound water is mainly distributed in the original low-permeability sandstone as a membrane in the pore wall and as short rods in the throat. Differences in pore structure and petrophysical properties affect the residual oil content and degree of oil recovery. For sandstones with good petrophysical properties, mild water flooding can improve crude oil recovery. The increase in oil production is mainly concentrated in the early stage of water flooding development, and the increase in oil recovery degree is not significant with the increase in injection multiples in the middle and late stages. However, for sandstones with relatively poor petrophysical properties, water flooding is more effective in the early and late stages than in the middle stages. Therefore, it is necessary to adjust the water flooding measures according to the differences in the petrophysical properties of the sand body. Local tectonics and natural fracture strikes are important factors affecting the direction of the expansion of water flooding fractures. Overall, the prevention of water channeling in low-permeability sandstones has to take into account the complex coupling between water flooding fractures, natural fractures, and hydraulic fractures.</p>","PeriodicalId":11673,"journal":{"name":"Energy Science & Engineering","volume":"12 11","pages":"5245-5265"},"PeriodicalIF":3.5,"publicationDate":"2024-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/ese3.1942","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142707457","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Distributary channel type and high-quality reservoirs in tight sandstone—A case study on the outcrops and reservoirs of Xujiahe formation in Western Sichuan Basin 致密砂岩中的分布通道类型和优质储层--四川盆地西部徐家河地层露头和储层案例研究
IF 3.5 3区 工程技术
Energy Science & Engineering Pub Date : 2024-10-10 DOI: 10.1002/ese3.1940
Junwei Zhao, Ling Zhang, Lei Tian, Yingtao Yang, Gongyang Chen
{"title":"Distributary channel type and high-quality reservoirs in tight sandstone—A case study on the outcrops and reservoirs of Xujiahe formation in Western Sichuan Basin","authors":"Junwei Zhao,&nbsp;Ling Zhang,&nbsp;Lei Tian,&nbsp;Yingtao Yang,&nbsp;Gongyang Chen","doi":"10.1002/ese3.1940","DOIUrl":"https://doi.org/10.1002/ese3.1940","url":null,"abstract":"<p>The distributary channels in shallow-water delta are well-developed in tight sandstone. There are few studies on the channel type and diagenetic differences among them. To illustrate the relationship between channel types and high-quality reservoirs, this study summarizes the lithofacies types and sequences in the second member of the Xujiahe Formation. We use core data, outcrops, and modern sediments observation, scanning energy spectrum, and rock thin sections. The lithofacies can be divided into 15 types, and there are four types of vertical lithofacies sequence. Lithofacies sequences are different in lithofacies, channel scale, reservoir porosity and permeability, and so forth. They are formed in various hydrodynamic environments. With the continuous bifurcation of the channels, the width and depth of the channels are decreasing, forming different lithofacies sequences. Four types of distributary channels are classified. The characteristics of these channels are described, and the sedimentary models are established. Distributary channel types are related to the diagenetic process. Channel type I and the bottom of type II develop moderate compaction–dissolution diagenetic facies, the middle and upper parts of type II and type III can develop strong compaction, moderate compaction–dissolution, or strong cementation diagenetic facies, and type IV can develop strong compaction diagenetic facies. High-quality reservoirs are developed in limitedly distributed in distributary channels of type I and type II, and part of type III. This study provides a useful view for evaluating high-quality reservoirs based on distributary channel types.</p>","PeriodicalId":11673,"journal":{"name":"Energy Science & Engineering","volume":"12 11","pages":"5119-5144"},"PeriodicalIF":3.5,"publicationDate":"2024-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/ese3.1940","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142707455","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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