bluuebunny/crossref_metadata_2025 huggingface dataset:
Phenotypic decanalization driven by social determinants could explain variance patterns for glycemia in adult urban Argentinian population
Authors: Petino Zappala María Alejandra , Folguera Guillermo , Benitez-Vieyra Santiago
Published: June 2022

Type 2 diabetes, one of the major causes of death and disability worldwide, is characterized by problems in the homeostasis of blood glucose. Current preventive policies focus mainly on individual behaviors (diet, exercise, salt and alcohol consumption). Recent hypotheses state that the higher incidence of metabolic disease in some human populations may be related to phenotypic decanalization causing a heightened phenotypic variance in response to unusual or stressful environmental conditions, although the nature of these conditions is under debate. Our aim was to explore variability patterns of fasting blood glucose to test phenotypic decanalization as a possible explanation of heightened prevalence for type 2 diabetes in some groups and to detect variables associated with its variance using a nation-wide survey of Argentinian adult population. We found patterns of higher local variance for fasting glycemia associated with lower income and educational attainment. We detected no meaningful association of glycemia or its variability with covariates related to individual behaviors (diet, physical activity, salt or alcohol consumption). Our results were consistent with the decanalization hypothesis for fasting glycemia, which appears associated to socioeconomic disadvantage. We therefore propose changes in public policy and discuss the implications for data gathering and further analyses.
Elucidation of radical- and oxygenate-driven paths in zeolite-catalysed conversion of methanol and methyl chloride to hydrocarbons
Authors: Cesarini Alessia , Mitchell Sharon , Zichittella Guido , Agrachev Mikhail , Schmid Stefan P. , Jeschke Gunnar , Pan Zeyou , Bodi Andras , Hemberger Patrick , Pérez-Ramírez Javier
Published: June 2022

Understanding hydrocarbon generation in the zeolite-catalysed conversions of methanol and methyl chloride requires advanced spectroscopic approaches to distinguish the complex mechanisms governing C–C bond formation, chain growth and the deposition of carbonaceous species. Here operando photoelectron photoion coincidence (PEPICO) spectroscopy enables the isomer-selective identification of pathways to hydrocarbons of up to C14 in size, providing direct experimental evidence of methyl radicals in both reactions and ketene in the methanol-to-hydrocarbons reaction. Both routes converge to C5 molecules that transform into aromatics. Operando PEPICO highlights distinctions in the prevalence of coke precursors, which is supported by electron paramagnetic resonance measurements, providing evidence of differences in the representative molecular structure, density and distribution of accumulated carbonaceous species. Radical-driven pathways in the methyl chloride-to-hydrocarbons reaction(s) accelerate the formation of extended aromatic systems, leading to fast deactivation. By contrast, the generation of alkylated species through oxygenate-driven pathways in the methanol-to-hydrocarbons reaction extends the catalyst lifetime. The findings demonstrate the potential of the presented methods to provide valuable mechanistic insights into complex reaction networks.
Ab-initio calculations of shallow dopant qubits in silicon from pseudopotential and all-electron mixed approach
Authors: Ma Hongyang , Hsueh Yu-Ling , Monir Serajum , Jiang Yue , Rahman Rajib
Published: June 2022

Obtaining an accurate first-principle description of the electronic properties of dopant qubits is critical for engineering and optimizing high-performance quantum computing. However, density functional theory (DFT) has had limited success in providing a full quantitative description of these dopants due to their large wavefunction extent. Here, we build on recent advances in DFT to evaluate phosphorus dopants in silicon on a lattice comprised of 4096 atoms with hybrid functionals on a pseudopotential and all-electron mixed approach. Remarkable agreement is achieved with experimental measurements including: the electron-nuclear hyperfine coupling (115.5 MHz) and its electric field response (−2.65 × 10−3 μm2/V2), the binding energy (46.07 meV), excited valley-orbital energies of 1sT2 (37.22 meV) and 1sE (35.87 meV) states, and super-hyperfine couplings of the proximal shells of the silicon lattice. This quantitative description of spin and orbital properties of phosphorus dopant simultaneously from a single theoretical framework will help as a predictive tool for the design of qubits.
In situ characterization of aggregates of nanoscale zero-valent iron (nZVI) in water: an engineering aspect
Authors: Wang Weiyi , Li Jianhua , Li Shaolin , Zhang Wei-xian
Published: June 2022

The study is the first work characterizing nZVI aggregates in water and provides essential data for practical applications of nZVI.
Quercetin ameliorated cardiac injury via reducing inflammatory actions and the glycerophospholipid metabolism dysregulation in a diabetic cardiomyopathy mouse model
Authors: Jiang Chunjie , Li Dan , Chen Li , Liu Yang , Zhao Ying , Mei Guibin , Tang Yuhan , Yang Yuexin , Yao Ping , Gao Chao
Published: June 2022

The graphical abstract of the study. Quercetin is present in a variety of common fruits and vegetables. And quercetin ameliorated the myocardial injury in diabetic mice.
Influence of ion beam surface treatment on the emission performance of photocathodes
Authors: Liu Yanwen , Li Fen , Tian Hong , Wang Guojian , Wang Xiaoxia
Published: June 2022

Photocathodes are mainly used in such hi-tech fields as photoelectric conversion devices, radiation detection, and accelerators.
Flexible 1.3 μm photodetector fabricated with InN nanowires and graphene on overhead projector transparency sheet
Authors: Shin Jaehyeok , Yang Hohyun , Noh Siyun , Han Sangmoon , Kim Jin Soo
Published: June 2022

The first demonstration of flexible 1.3 μm photodetectors fabricated with InN nanowires (NWs) and graphene on an overhead projector transparency (OHP) sheet.
Assembly, structure and thermoelectric properties of 1,1′-dialkynylferrocene ‘hinges’
Authors: Wilkinson Luke A. , Bennett Troy L. R. , Grace Iain M. , Hamill Joseph , Wang Xintai , Au-Yong Sophie , Ismael Ali , Jarvis Samuel P. , Hou Songjun , Albrecht Tim , Cohen Lesley F. , Lambert Colin , Robinson Benjamin J. , Long Nicholas J.
Published: June 2022

Dialkynylferrocenes are interesting candidates for molecular electronics. Herein, numerous experiments are applied to probe their properties both as single-molecules and in monolayers, demonstrating unique geometric and thermoelectric properties.
Functionalisation of ethereal-based saturated heterocycles with concomitant aerobic C–H activation and C–C bond formation
Authors: Ahmed Nehaal , Spears Richard J. , Sheppard Tom D. , Chudasama Vijay
Published: June 2022

Herein we disclose a novel method for the aerobic C–H activation of ethereal-based heterocycles to generate various α-functionalised building blocks.
Histidine-specific bioconjugationviavisible-light-promoted thioacetal activation
Authors: Wan Chuan , Wang Yuena , Lian Chenshan , Chang Qi , An Yuhao , Chen Jiean , Sun Jinming , Hou Zhanfeng , Yang Dongyan , Guo Xiaochun , Yin Feng , Wang Rui , Li Zigang
Published: June 2022

Functionalization of histidine residues in proteinsviavisible-light-promoted thioacetal activation is reported. ∼2000 proteins with reactive and exposed histidine residues from the MCF7 cell line are characterized using ABPP by this method.
Asymmetric synthesis of aryl/vinyl alkyl carbinol estersviaNi-catalyzed reductive arylation/vinylation of 1-chloro-1-alkanol esters
Authors: Sun Deli , Tao Xianghua , Ma Guobin , Wang Jifen , Chen Yunrong
Published: June 2022

Ni-catalyzed asymmetric arylation/vinylation of racemic 1-chloro-1-alkanol esters with aryl/vinyl electrophiles has been developed for the synthesis of aryl/vinyl alkyl carbinol esters with a high level of enantioselectivity.
Subjective quality assessment of synthesized videos for windowed six degrees of freedom video system
Authors: Zou Wenhui , Peng Zongju , Ma Xiaoyan , Chen Fen , Jiang Gangyi
Published: June 2022

For synthesized videos, view synthesis and compression are two main types of artefacts influencing the perceived quality. Moreover, vertical disparity co‐exists with horizontal disparity in windowed six degrees of freedom (6DoF) system, and the viewers have some possible movement when exploring the content. This letter constructs a windowed 6DoF synthesized video quality database involving 128 distorted videos, using four sequences, four levels of compression, and four rendering schemes. The impact of two navigation trajectories on the perceived quality of windowed 6DoF videos is studied subjectively. The authors also evaluate the performances of several objective quality metrics on the proposed database; the results reveal the effectiveness and necessary of our database.
Analysis and implementation of an interleaved high step‐up converter with reduced voltage stress an interleaved high step‐up DC‐DC converter with ZVS
Authors: Kargaran Mohamad Javad , Raraei Hosein Jafari , Nouri Tohid , Shaneh Mahdi
Published: June 2022

A new symmetrical structure of the interleaved converter type is proposed in this paper to obtain high voltage gain. The proposed converter delivers a very high voltage ratio using the coupled inductor technique and switched capacitor, and all this happens at a moderate duty cycle. Furthermore, the MOSFETs have low voltage stresses. Therefore, MOSFETs with low conductivity resistance can be used to reduce the conduction losses. The input current has a small ripple because the input side uses the interleaved operation. Furthermore, zero‐current‐switching (ZCS) is obtained for MOSFETs, and the problem of reverse‐recovery for diodes is confined. Moreover, the passive clamp circuit recycles the energy of the leakage inductances which avoids high voltage spikes across the switches. Performance of the proposed converter along with the small‐signal analysis is discussed in detail. Finally, a laboratory prototype is developed with 30 V input and 400 V output to verify the proposed converter.
High-pressure heavy oil saturation treatment method of outcrop core based on loose sandstone heavy oil reservoirs
Authors: Zhang Shun , Li Mingzhong , Shi Yan , Yan Tingting , Xie Junhui
Published: June 2022

The unconsolidated sandstone heavy oil reservoir is dominated by heterogeneous elastic-plastic reservoir with complex structure. The core demand is large in the study of reservoir lithology and physical properties. Although the high-cost freezing and encapsulation processes are used in the process of coring site and indoor processing, they are still easy to damage in the process of extracting cores. Moreover, the physical parameters of ordinary artificial cores are too different from those of producing cores to obtain accurate lithology and physical parameters. So, replacing the production cores with outcrop cores may become an important method to study the physical parameters of reservoirs. In this paper, the micro-velocity displacement method and saturated heavy oil method are used to study the lithology and physical property parameters of outcrop cores. The results show that compared with those of producing cores, the rock mechanics parameters of outcrop cores after high-pressure heavy oil saturation treatment are basically consistent with those of field cores. Therefore, it can be used to replace the core to study the physical parameters of rocks in special cases.
Visualization method of seismic profile data based on adaptive mosaic
Authors: Xie Renjun , Yuan Junliang , Shu Mengcheng
Published: June 2022

Three-dimensional visualization of seismic profile data can better display seismic data information than traditional profile display, but there are mosaic errors in grid mosaic. In order to solve the problem of false mosaics, an adaptive mosaic method is proposed, first in the pixel shader Calculate the sample point most relevant to the current sample point on the next track, and then map its relative offset in the time direction to the tilt mode and render it to the texture. When filling the vertex index, fully consider the tilt of the adjacent sample points on the same track In order to realize the adaptive tessellation of vertices; finally, the effectiveness of the proposed method is verified through experiments.
Optimization of management measures for water-producing gas wells in SM gas field
Authors: Fan Zhiqiang , Xu Guangjun , Xi Liying , Zhao Dangni , Liu Sihong , Sun Long , Zhu Runhua
Published: June 2022

SM gas field is a typical tight sandstone gas reservoir, which adopts the production mode of downhole throttling and inter-well series connection. Gas wells will have different production characteristics at different stages of production, which will cause the management measures implemented by gas wells in different stages to have different effects on efficiency[1-2]. Based on the complex production law of water-producing gas wells in SM Gas Field, this paper is based on the quantitative evaluation of the impact of water production on gas well development indicators for the latter. Clarify the reasons for the production of water and water from gas wells, understand the production rules of water-producing gas wells, optimize the management measures of water-producing gas wells in SM Gas Field, and clarify the rational production allocation methods and work under various complex water-producing conditions during the development of water-producing gas wells system[3]. It can also lay a foundation for the subsequent development of low-yield and low-efficiency wells to tap potential measures, to propose technical countermeasures to enhance oil recovery in the SM gas field, and to carry out gas field-related stable production potential evaluation.
Analysis and Understanding of the Fracturing Effect of Small Fracture Network in P Reservoir
Authors: Jia Dongmei
Published: June 2022

As the oil field enters the medium and high water cut stage, the difficulty of the measures to explore the potential is increasing, the geological conditions of new production wells are getting worse, it is more and more difficult to select wells and layers, and the effect of oil increase is gradually getting worse. In order to improve the effect of oil increase, it is necessary to refine the measures to explore the potential, expand the space of well and layer selection, and optimize the fracturing process. Therefore, we drew on the successful experience of small fracture network fracturing in T oilfield, selected six straight wells for fracturing of small fracture network in the P reservoir of the S oil field, expanded the oil discharge area, raised the seepage capacity of reservoir, and improved the development effect.
The posibility analysis of high-pressure drilling in Block A in Field F
Authors: Zhou Wenming
Published: June 2022

The drilling and shut-in regulations for peripheral oil fields currently follow the standard of the old area of placanticline, i.e., the wellhead pressure of water injection wells within 600m of the drilling well is reduced to below 3MPa before drilling. The regulations did not take into account the depth of the target formation, structural development, reservoir properties and oil and water well connectivity in the peripheral oilfield, which made it difficult to relieve pressure in most of the wells and resulted in longer drilling and shut-in cycles and greater impact on production. In order to minimize the impact of drilling and shut-in on field development and to explore drilling and shut-in limits and standards suitable for peripheral fields, drilling tests were conducted in Block A for infill wells. The feasibility of high pressure drilling in the peripheral low permeability oilfield was analyzed by analyzing the drilling site conditions, the quality of post-completion cementing and the logging data of the completed wells under different pressure conditions.
Study of a strong inhibitory solid-free drilling fluid
Authors: Zhang Li , Wu Qianqian , Chen Lei , Wang Jiacong
Published: June 2022

The study on the problem of hydration and dispersion expansion of shale and the poor high temperature resistance and lubrication performance of mud with soil is carried out. The selection of viscosity enhancer, filter loss reducing agent, lubricant and inhibitor in solid-state drilling fluid was carried out through experiments. The formula of solid-free drilling fluid was 0.2% 1831+1% xanthan gum+1% phenolic resin and 1% sodium benzenesulfonate. The linear expansion rate of bentonite is less than 20%, which shows that the formulation has good inhibition performance. The mud ball in the drilling fluid after 48 h of storage did not undergo hydration expansion, which indicated that the formulation had strong inhibition on the hydration expansion of clay. Finally, after heating the formula in a roller heating furnace at 120 °C for 16 h, the plastic viscosity, dynamic shear force and apparent viscosity of the formula were determined as 14.00 mPa·s, 24.00 Pa and 39.50 mPa·s respectively, while FL (filtration loss) was 17 mL. In conclusion, the strong inhibition solid-phase drilling fluid formula is superior in both the inhibition of hydration expansion and the high temperature resistance of clay.
Analysis on the current situation of water injection development in a block of sunenoer Oilfield
Authors: Li Jiangsen
Published: June 2022

Surennuoer oilfield is located in the north of Wuerxun Sag, beierhu depression, Haita basin. This paper introduces the geological characteristics of the oilfield from the aspects of oilfield structure and reservoir physical properties; On the basis of carefully combining the dynamic and static data, this paper analyzes the dynamic development characteristics of the oilfield since it was put into development. At the same time, combined with its characteristics, it summarizes the main understanding of the current oilfield development, which provides reference experience for the future water injection development adjustment of low permeability oilfields, and has certain reference significance for the efficient and rapid development of similar oilfields.
Study of batch pre-processing techniques for logging curves of different periods
Authors: Lu Na
Published: June 2022

The sampling spacing of different series of old well data curves is varied and does not facilitate multi-well batch interpretation. This study achieves automatic interception of invalid well sections and reads valid sections into memory, increasing the speed of computing and the number of wells processed in batch; it also achieves automatic error detection and curve normalization, and outputs data files with useful curves and interpretation results, increasing the speed of computer operation and the number of wells processed in batch for old wells.
Application Analysis of Integral Fracturing Measures in Oil Reservoir
Authors: Li Ming
Published: June 2022

With the continuous development of oil reservoir, integral fracturing has become an effective measure to improve production and efficiency. Therefore, starting from reservoir fracturing reform, effectively implement fracturing reform and promote the improvement of reservoir development index. This paper expounds the related contents of integral fracturing technology, and then probes into the application of integral fracturing measures in oil reservoir.
Technical Analysis of Enhanced Oil Recovery by Polymer Flooding
Authors: Zhao Manyong
Published: June 2022

Polymer flooding is one of the effective technologies to improve oil recovery. This paper briefly introduces the mechanism of polymer flooding, and describes the application advantages of polymer flooding in heavy oil sandstone reservoirs in China. Combined with the application practice of polymer flooding EOR technology, the scheme of polymer flooding EOR technology is further explored from the aspects of polymer flooding oil supply, polymer flooding oil injection mode and polymer solution mass concentration, hoping to provide some references for the improvement of reservoir recovery.
Research and effect analysis on improving injection mode of weak alkali ASP flooding in poor oil layer block
Authors: Tian Haifeng
Published: June 2022

In view of the large proportion of thin and poor layers in the weak-alkali ternary flooding block, the statistical analysis method is used to optimize the division of well groups with injection capacity, establish a strategy chart for different types of groups to maintain injection and tap potential, and optimize the well groups of different sand body connectivity types. The fracturing method strengthens the whole process of fracturing in the well area with poor injection capacity. The effective thickness water absorption ratio is over 80%, the maximum water cut reduction in the stage is 9.65%, the low water cut stable period is 16 months, and the recovery factor is increased by 8.77 percentage points. development effect.
Effect of pressure systems on the development effectiveness of 125m polymer blocks
Authors: Sun Jia
Published: June 2022

Since the industrial polymer drive development in the oilfield, eight blocks have experienced polydrive development successively. With the extension of the development time, the extraction well spacing of polymer drive blocks has been reduced. After the reduction of well spacing, the influence of whether an effective pressure system can be established on the development effect gradually increases, and the minimum value of pressure space rises from about 0.5 MPa to 1.5 MPa, and the value of improved recovery rate is nearly 3 percentage points less with the same subsurface pore volume PV number injected. In this paper, we study the pressure system to find out the influence of pressure system on the development effect of 125m polymer block, and take adjustment measures to improve the development effect of poly-drive.
Study on Injection-Production Adjustment Technology in Sanduo Oilfield
Authors: Shi Yongli
Published: June 2022

On the basis of understanding the geological characteristics of low permeability oil fields with scattered sand bodies, this paper studies the water injection policy, response characteristics and the oil fields entering the middle water cut stage since the production. Affected by the scattered underground sand bodies, it is exposed to the influence of low water flooding control degree and less water flooding direction. After water breakthrough, it is difficult to adjust the water well scheme and the formation pressure level is low. In order to alleviate the above contradictions, oil wells are converted to injection, water drive control degree is improved, and formation energy is increased. In order to improve the control degree of sand bodies, several schemes are compared to find out the transfer injection mode suitable for oil fields with scattered sand bodies, increase the proportion of multiple connections and improve the oil recovery ratio.
Study on oil and gas filling and migration and accumulation in synclinal reservoir area
Authors: Xue Huizhi
Published: June 2022

In recent years, the focus of oil and gas exploration in western Daqing has changed from a single large structural high point packaged reservoir to a diversified complex structural low point syncline reservoir. Such reservoirs are mainly lithologic traps, with complex rules of oil and gas filling, migration and accumulation, and irregular oil-water distribution, resulting in unclear understanding of the formation and distribution of syncline lithologic traps. The typical GLN area dominated by lithologic reservoirs is selected as the research object. The oil and gas filling research under the condition of reservoir forming power is carried out by using the source reservoir pressure difference. Based on the plane distribution of crude oil density, the secondary migration and accumulation rule of oil and gas is studied. It is considered that GLN can contain oil in a large area, but oil and gas can not migrate in a long distance. The low value area of crude oil density is the breakthrough of primary migration and the starting point of secondary migration, and its formation is controlled by the principle of phase potential coupling. The sand body is highly heterogeneous and the oil-water distribution is complex, while the sheet sand is mainly pure oil layer, and the water layer is formed only in the parts far away from the breakthrough and poor physical properties.
Demonstration Zone of “Water Control and Efficiency Improvement” in Area 1 of Laxi Block Study on fine liquid splitting method
Authors: Zhang Jiying
Published: June 2022

Lamadian Oilfield has entered the late stage of ultra-high water cut development, and the producing conditions of each sublayer are different. In order to know the producing conditions of each sublayer more clearly, it is necessary to count the reserves and output conditions of each sublayer. Therefore, it is necessary to finely divide the liquid and oil production of each sublayer of the production well. The former liquid splitting method only considered the formation influencing factors, that is, the splitting method of formation coefficient, which could not meet the differences of different water cut in each sublayer at present. Through the research of fine liquid splitting method, we can clearly understand the production of each oil well layer in the block, the production status and adjustment potential of each sub-layer, thus guiding the adjustment and tapping potential of block layering measures. It provides a theoretical basis for the later development of ultra-high water cut block.
A Block in Daqing Saltu Oilfield Study on well network reconstruction of stratigraphic system
Authors: Qin Yanyu
Published: June 2022

A block in Daqing Saltu Oilfield has a large span of formation systems, large permeability grade difference, prominent inter-formation conflicts, low degree of control of multi-directional water drive, large injection and extraction well spacing in thin differential layers, and low degree of utilization, etc. In this regard, based on the existing well network, a study on the reconstruction of the formation system well network is carried out in this area. Longitudinal subdivision of the layer system, narrowing the mining span, the X, Y, Z oil layer mixed mining, adjusted to X oil layer separate mining, Y + Z oil layer mixed mining; at the same time, according to the nature of the oil layer subdivision of mining objects, X oil layer and Y + Z oil layer mining objects adjusted to medium and high permeability layer and low permeability layer. On the plane of optimizing the injection and extraction well spacing, the original 250m well spacing was adjusted to 175m area well network, which eased the development contradiction.
Quantitative reservoir classification and evaluation based on reservoir microscopic characteristics
Authors: Zhao Hui
Published: June 2022

In view of the remaining oil recovery situation and the needs of the development of tertiary oil recovery technology, using mercury intrusion data, through statistical analysis of the relationship between microscopic pore structure parameters and permeability, it is clear that there is a good correlation between permeability and various microscopic pore structure parameters. It is believed that the reservoir permeability can comprehensively and quantitatively characterize the complexity of the pore structure of the reservoir. The higher the permeability, the weaker the microscopic heterogeneity of the reservoir and the better the reservoir quality. And according to the microscopic characteristics of the reservoir, it is quantitatively divided into Type I reservoir, Type II reservoir, Type III reservoir, Type IV reservoir and Type V reservoir, which realizes the quantitative classification and evaluation of complex reservoirs, which is the best reservoir for reservoirs. The deepening understanding of strata has laid a foundation for the selection of tertiary oil recovery injectors.
Optimization of EOR after combined flooding
Authors: Zhang Ju
Published: June 2022

After polymer flooding treatment, the oil recovery can be enhanced through the application of advanced technology. However, in practical applications, excess residues will be generated after polymer flooding treatment. Therefore, in the analysis and treatment of residues, the distribution law of residues after polymer flooding is analyzed, and the recovery process and distribution treatment process are carried out. optimization to achieve enhanced oil recovery after polymer flooding. After the polymer flooding treatment, the high concentration and high molecular weight polymer treatment can improve the recovery rate of crude oil, and on the basis of the polymer flooding treatment, the polymer flooding effect can be improved, which can effectively improve the crude oil recovery rate. recovery and improve the development efficiency of oilfields.
Application of computer software technology in oilfield geological exploration and development
Authors: Xia Yunqing
Published: June 2022

Computer technology as the representative of the twelfth century advanced technology, in people’s life and production play a more and more important role. Especially in this link of energy development, its advantage is increasingly important and obvious. Petroleum is a part of China’s energy resources framework. The importance of its exploration work is self-evident. In oilfield geological exploration, the application of computer software technology is an important means to improve the utilization rate of energy resources in China. This article delves into the problem. And the problems it faces, and provide reasonable solutions.
Study on optimal combination of stratified water injection in extra high water cut period
Authors: Duan Lunjian
Published: June 2022

After several decades of mining, the block has entered the development stage of ultra-high water cut. Although the encryption adjustment and subdivision adjustment for different mining objects have been completed, the interlayer interference is still serious and invalid cycle still exists, making it difficult to develop and adjust. The subdivision adjustment of water injection well can further improve the production degree of various oil layers, effectively improve the utilization rate of water injection, and realize the adjustment of water injection well profile and water injection structure, which is one of the measures with low investment that can effectively improve the development effect of water flooding. To satisfy the needs of the reservoir, fine reservoir, operation based on the production dynamic data and based on the analysis of monitoring data, the application of multidisciplinary reservoir description technology, quantitative analysis of thin layered segment permeability variation coefficient, monolayer onrush of small layer in the paragraph number, interval number, sandstone thickness influence on subdivision adjustment effect, analysis of well test cycle and operation costs influence on economic benefits, A series of combination parameters of subdivision water injection interval are obtained, which can guide the subdivision water injection program, effectively alleviate the range of production decline and water cut rise, and provide technical support for fine tapping potential of water flooding in ultra-high water cut period.
Several potentiality enhancement techniques of water flooding reservoir in placanticline
Authors: Zhang Yichi
Published: June 2022

The three types of oil reservoirs in water drive have entered the later stage of ultra-high water cut development [1] after three times of well pattern infilling adjustment and years of oil stabilization and water control. With the gradual transfer of high quality reserves to chemical flooding, the development objects of water flooding are mainly three types of oil reservoirs, and the exploitation objects are getting worse and worse, and the difficulty of controlling decline, exploiting potential and benefit development is increasing year by year. To this end, the blocks that have been tested for water control and efficiency improvement are selected to conduct precise potential-tapping tests, to carry out technological breakthroughs of “water control and efficiency improvement”, to explore and form a series of high-efficiency development technologies of water flooding, and to guide the deep potential-tapping in the ultra-high water-cut stage of water flooding [2]. This paper mainly focuses on the comprehensive utilization of injection and production well pattern, as well as the principle and effect of injection well comprehensive adjustment program and tracking adjustment program.
Analysis of low production and low efficiency oil recovery and enhanced oil recovery methods
Authors: Zhang Ying
Published: June 2022

Since the 21st century, under the background of steady social and economic development, China’s petroleum enterprises have developed rapidly, but in the process of oil well engineering, there are also low production, low efficiency, in order to improve oil well recovery, it is necessary to understand the low production, low efficiency, the implementation of effective solutions. This paper analyzes the causes of low production and low efficiency in combination with specific examples of oil well engineering, and further puts forward methods to improve oil well recovery, hoping to provide some valuable suggestions for the development of oil well engineering.
Challenges and strategies of water system in extra high water cut development stage
Authors: Wu Wenbo
Published: June 2022

At present, China’s oil fields are in the period of ultra-high water cut production, production capacity continues to decline, the cost of water resources continues to rise, the input and operating costs of water supply system continue to increase, it is very difficult to reduce costs, improve benefits; With the change of chemical flooding to thin and poor formation, the exploitation and utilization of heavy oil in Fuyu Oilfield and its surrounding area require higher water quality. At present, it is urgent to solve the fine treatment of mining water and the recovery technology of fracturing wastewater. Due to the aging of the station, there are numerous safety and environmental issues, so the work of reducing energy consumption is onerous. Faced with many new problems, the water industry must plan ahead, control investment, reduce costs, maintain water quality, improve efficiency, and develop and reserve suitable technologies.
Analysis on causes and countermeasures of abnormal water injection in oilfield Wells
Authors: Jiang Xiaoyi
Published: June 2022

In the process of oilfield development, water injection is a very important work content, and the reservoir exploitation quality, efficiency, are closely related. Oilfield water injection technology has been widely applied and popularized, but in the process of specific application, it will also have some influence on the oilfield, such as causing oil layer blockage. The author will focus on the application of oilfield well water injection, analyze the related reasons for the occurrence of anomalies, and put forward solutions to the abnormal phenomena one by one, so as to ensure that the relevant personnel can solve the related problems quickly when applying this technology, and achieve stable oilfield production.
Cause analysis and preventive measures of casing damage in Punan Oilfield
Authors: Zhou Xueqin
Published: June 2022

South region of casing damage Wells based on the statistics of Portugal plane and vertical distribution characteristics, combined with dynamic production of oil and water Wells, drilling pressure, measures, Wells and water injection cycle switch formation pressure and oil and water Wells casing damage reason analysis and summarizes the classification, find out the main factors of influence of casing damage, and put forward the effective measures of casing to prevent, reduce the speed of casing damage and to improve oilfield development effect.
Numerical simulation of polymer flooding in water flooding reservoir
Authors: Sun Xiaofei , Zhang Qingquan , Teng Zhiyi , Wang Xueqian , Cai Jiaming
Published: June 2022

Different influencing factors in the process of polymer flooding have different degrees of influence on the development effect, so it is necessary to carry out the dynamic prediction of polymer flooding before implementing the development scheme. In this study, the reservoir model of C Block is established and the production performance is fitted. The fitted reservoir model is used to study the influence of polymer concentration, injection time, injection rate multiple and injection timing on the development effect of C Block. The results show that the cumulative oil production increases gradually with the increase of polymer concentration, and combined with the principle of economic development, there is an optimal polymer concentration in C Block, which is 0.15 wt%; With the increasing of injection time and injection rate multiple, the cumulative oil production and incremental oil production (compared with water flooding) show an increasing trend; For injection timing, the earlier polymer injection is more conducive to obtaining higher cumulative oil production and oil increment. The cumulative oil production under the optimal development scheme of C block is 23.8494×104 m3, which is 1.5042×104 m3 higher than that of water flooding.
Research and application of large-scale fracturing imitating horizontal well technology in vertical well
Authors: Yang Song
Published: June 2022

Hailaer Basin is rich in geological reserves, but the proportion of undeveloped reserves is high, accounting for 30% of the proved reserves. In order to improve the production degree of reserves and single well production, and realize the purpose of high and stable production of the oilfield. Taking the ultra-low permeability reservoir of oilfield B in Hailaer Basin as an example, this paper puts forward the large-scale fracturing of vertical wells and water injection development technology of imitating horizontal wells. By forming directional ultra long fracturing fractures in the oil layer, this technology can effectively increase the reservoir conductivity, increase the oil well drainage area and water well control area, reduce the well pattern density and improve the production of single well. The research shows that the undeveloped reserves in Hailaer oilfield have the characteristics of low thickness, low permeability and low reservoir quality index. There are 55 large-scale mold fracturing wells in Hailaer oilfield, with an initial oil increase of 2.2 times. The sand amount of large-scale fracturing is 2.5 times that of ordinary fracturing, and the fluid amount and sand intensity are 4.5 times that of conventional fracturing. The vertical well large-scale fracturing imitating horizontal well technology is adopted in Oilfield B. The designed vertical well fracturing fracture is 600m long and 120m wide, and the production effect is good after fracturing. The research results are of great significance to the high and stable production of undeveloped reserves block in Hailaer oilfield and other similar oilfields.
Experimental Study on Physical Model of Prestressed Anchorage Mechanism of Fractured Rock Slope
Authors: Liu Shujun
Published: June 2022

In view of some problems in the application of prestressed anchoring technology in broken rock slope, this study, combined with the prestressed anchoring project of K+276 broken rock slope of Chengdu-Chongqing Expressway (CCE), based on the field geological survey and key data monitoring, adopts physical model test to study the diffusion mode of prestressed anchor cable. The concrete influence of rock mass quality, anchor cable tensioning tonnage and other factors on the stress and deformation of broken rock slope is analyzed, and the application mechanism of prestressed anchorage technology in the reinforcement of broken rock slope is discussed.
Analysis on annual rainfall’s cycle and trend of Caoejiang sluice
Authors: Ding Peng , Chen Caiming , Zhang Qian , Zhang shuhui , wang Yang , Su Caichao
Published: June 2022

Caoe River sluice project is located at the Caoe River Estuary on the South Bank of Jianshan River Bay of Qiantang River. The project has comprehensive utilization of moisture-proof (flood), waterlogging control, water resources development and utilization, as well as improving water environment and shipping. The completion of the Cao’e River Sluice Project has improved the flood control capacity of the main stream of the Cao’e River (below the Shangpu sluice), the drainage capacity of the plain of the Cao’e River Basin, and the navigation guarantee rate of the Hangzhou Ningbo canal and the Cao’e River section of the Hangzhou Ningbo canal. The regulation of Cao’e River sluice has an important impact on the above functions. The regulation of Cao’e River Sluice depends on the accurate analysis of rainfall. Therefore, this paper analyzes the rainfall in the area where the Cao’e River sluice is located, and finds that it has a long period of 34 years and a small period of 20 years, and will be in a dry period in the next few years.
Consistency Analysis of Large-scale Energy Storage Batteries
Authors: Ping Xueliang , Zhou Pengcheng , Zhang Yuling , Lu Qianzi , Chen Kechi
Published: June 2022

With the development of large-scale electrochemical energy storage power stations, lithium-ion batteries have unique advantages in terms of re-energy density, power density, and cycle life, and are applied to power system energy storage devices. However, behind the rapid development, there are many key issues unanswered, which are likely to lead to various safety accidents. Therefore, it is very important to conduct consistency analysis of lithium batteries used in large-scale power systems to prepare for system safety assessment. This paper mainly explains the reasons and manifestations of the inconsistency, and based on data mining algorithms, uses the charging voltage curve clustering analysis method based on subtractive clustering to evaluate the consistency of lithium-ion batteries.
Study on water level correlation of key nodes in the north line of East Zhejiang Water Diversion Project
Authors: Jin Qiwu
Published: June 2022

Eastern Zhejiang is an important area for the economic development of Zhejiang Province. However, water resources in eastern Zhejiang are relatively poor. After the completion of the north line of East Zhejiang Water Diversion Project, the catchment and drainage connecting rivers of all counties and cities have been dredged, the flood control and drainage capacity of all counties and cities has been improved, the river channels along the line have also been comprehensively renovated, the river network water environment of Shangyu City, Yuyao City and Cixi City along the water diversion line has been significantly improved, and the environmental quality of the area around Hangzhou Bay on the South Bank of Qiantang River has been improved. In order to find out the correlation between the water levels of key nodes of the project and provide more targeted guidance for future scheduling, this paper uses the partial least square method to calculate the relationship between the water levels of each node. It is found that there is a significant correlation between the upper water level of Sanxing sluice and the water level under Xinsan sluice and Mashan sluice, and there is a certain correlation with the upper water level of xinsanjiang sluice and Mashan sluice. The correlation between the upstream water level of Xiaoshan hydroproject and the water levels under xinsanjiang sluice, Heshan sluice and Mashan sluice is obvious; There is the most significant linear correlation between the water level of Hengjiang River in xisantang and the water level of Lingshan, Lingshan, Qitang, Sitou and Sitou. The correlation between the water level of Yangxun bridge, Puqian gate and Qitang gate is also significant, and the correlation of other water level stations is poor. In addition, there is a great correlation between the water level of Yangxun bridge and the downstream water level. Attention should be paid to observing the water level of Yangxun bridge during the dispatching process.
Effects of O3 stress on photosynthesis of trees
Authors: Chen Bo , Pan Qinghua , Zhou Xiaoling , Luo Jia , Zhang Hong , Zhang Zhihao
Published: June 2022

The effects of elevated O3 (O3) on photosynthetic characteristics of urban trees were studied in an open-top air chamber. The results showed that net photosynthetic rate (Pn), transpiration rate (Et), stomatal conductance (Gs) and water use efficiency (WUE) of different tree species decreased significantly with the increase of O3 concentration, while intercellular CO2 (Ci) concentration of different tree species increased significantly with the increase of O3 concentration. Under different O3 concentrations, the net photosynthetic rate, transpiration rate, stomatal conductance and intercellular CO2 concentration of Ginkgo biloba (G. biloba) and Koelreuteria paniculata (K. paniculata.) were higher than those of Pinus bungeana (P. bungeana) and Platycladus orientalis(P. orientalis), and the WUE of P. bungeana and P. orientalis was higher than that of G. biloba and K. paniculata. The effect of elevated O3 concentration on plant photosynthesis is more obvious in K. paniculata and G. biloba.
Research on Gas-Water Recognition Method in Natural Gas Reservoir
Authors: Li Ying
Published: June 2022

With the development of sustainable economy, natural gas as a clean energy has received great attention, but there are still many problems to be solved in the exploration and development of natural gas. Among them, gas-water identification method of natural gas reservoir is a hot research topic at present. Correctly identifying reservoir properties and improving the ability of gas-water identification are the key points of expanding natural gas reserves and enhancing the exploration value of discovered gas reservoirs. With the deepening and development of the research on gas-water identification of natural gas reservoir in recent years, the experimental methods and technical means have been constantly enriched and improved, and more research results have been obtained, but they are still in the exploratory stage. Therefore, it is necessary to continuously strengthen the research on gas-water identification methods of natural gas reservoirs, make full use of current advanced technologies, and improve the coincidence rate of computer interpretation of gaswater layers.
Design and research of electric heating as the core of energy system renovation of existing buildings
Authors: Liu Weitao , Wang Fuqing , Zhang Xuze , Shi Linguang , Zhao Chenyang , Chen Ruobo
Published: June 2022

With the implementation of China’s two-carbon strategy, how to achieve clean heating, especially the construction of a heating system with electricity as the core, has become a research hotpot in the industry. Among them, air source heat pumps, ground source heat pumps and energy storage have become important technical measures. In view of the capacity increase of urban heat exchange stations, combined with regenerative electric boilers and electricity price reform, this paper uses valley electricity for heat storage, and based on economic analysis, the municipal heat network is increased in flexibility and cleanliness, air energy, coupled energy storage clean and low-carbon heating transformation strategy.