The Open Petroleum Engineering Journal最新文献_第6页

Investigation of the Main Factors During Shale-gas Production Using Grey Relational Analysis 应用灰色关联分析研究页岩气生产影响因素

The Open Petroleum Engineering Journal Pub Date : 2016-09-30 DOI: 10.2174/1874834101609160207

Hongling Zhang, Jing Wang, Haiyong Zhang

{"title":"Investigation of the Main Factors During Shale-gas Production Using Grey Relational Analysis","authors":"Hongling Zhang, Jing Wang, Haiyong Zhang","doi":"10.2174/1874834101609160207","DOIUrl":"https://doi.org/10.2174/1874834101609160207","url":null,"abstract":"Shale gas is one of the primary types of unconventional reservoirs to be exploited in search for long-lasting resources. Production from shale gas reservoirs requires horizontal drilling with hydraulic fracturing to achieve the most economic production. However, plenty of parameters (e.g., fracture conductivity, fracture spacing, half-length, matrix permeability, and porosity, etc) have high uncertainty that may cause unexpected high cost. Therefore, to develop an efficient and practical method for quantifying uncertainty and optimizing shale-gas production is highly desirable. This paper focuses on analyzing the main factors during gas production, including petro-physical parameters, hydraulic fracture parameters, and work conditions on shale-gas production performances. Firstly, numerous key parameters of shale-gas production from the fourteen best-known shale gas reservoirs in the United States are selected through the correlation analysis. Secondly, a grey relational grade method is used to quantitatively estimate the potential of developing target shale gas reservoirs as well as the impact ranking of these factors. Analyses on production data of many shale-gas reservoirs indicate that the recovery efficiencies are highly correlated with the major parameters predicted by the new method. Among all main factors, the impact ranking of major factors, from more important to less important, is matrix permeability, fracture conductivity, fracture density of hydraulic fracturing, reservoir pressure, total organic content (TOC), fracture half-length, adsorbed gas, reservoir thickness, reservoir depth, and clay content. This work can provide significant insights into quantifying the evaluation of the development potential of shale gas reservoirs, the influence degree of main factors, and optimization of shale gas production.","PeriodicalId":377053,"journal":{"name":"The Open Petroleum Engineering Journal","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123737405","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 9

Models for Calcium Carbonate Precipitation in the Near-Well Zone by Degassing of CO2 二氧化碳脱气法在近井区碳酸钙沉淀的模型

The Open Petroleum Engineering Journal Pub Date : 2016-08-30 DOI: 10.2174/1874834101609160178

M. Wangen, J. Sagen, T. Bjørnstad, H. Johansen, A. Souche

{"title":"Models for Calcium Carbonate Precipitation in the Near-Well Zone by Degassing of CO2","authors":"M. Wangen, J. Sagen, T. Bjørnstad, H. Johansen, A. Souche","doi":"10.2174/1874834101609160178","DOIUrl":"https://doi.org/10.2174/1874834101609160178","url":null,"abstract":"Abstract: Calcium carbonate scale formation is a well known problem for water producing wells. Although there are several types of scale forming processes, we investigate the case of calcium carbonate precipitation when the degassing of CO2 causes the calcium equilibrium concentration to decrease towards a production well. We study a simplified system of carbonate chemistry, which allows for analytical expressions for the porosity loss as a function of time. The precipitation process normally goes from flow-limited away from the well to precipitation-limited close to the well. We derive an expression that estimates the transition zone between these two regimes. Furthermore, we present analytical estimates for the porosity reduction at a given radius as a function of time, including an estimate for each of these precipitation regimes. These analytical results are tested against numerical solutions for the porosity loss, which account for the full set of equations of the model. The analytical models give an accurate estimate of the linear porosity reduction with time, until at least half the porosity is lost. Examples of scale formation are given for the two regimes. Reasonable values for the precipitation kinetics indicate that most production operations have a kinetics-limited regime close to the well. The models also show that this type of scale formation takes place very close to the wells, typically within a few well radii from the walls of the well.","PeriodicalId":377053,"journal":{"name":"The Open Petroleum Engineering Journal","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127194815","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4

Investigating the Effect of Interlayer Geo-stress Difference on Hydraulic Fracture Propagation: Physical Modeling and Numerical Simulations 层间地应力差对水力裂缝扩展的影响:物理模拟与数值模拟

The Open Petroleum Engineering Journal Pub Date : 2016-08-29 DOI: 10.2174/1874834101609160195

Xiaosen Shang, Yun-hong Ding, Lifeng Yang, Yonghui Wang, Tao Wang

{"title":"Investigating the Effect of Interlayer Geo-stress Difference on Hydraulic Fracture Propagation: Physical Modeling and Numerical Simulations","authors":"Xiaosen Shang, Yun-hong Ding, Lifeng Yang, Yonghui Wang, Tao Wang","doi":"10.2174/1874834101609160195","DOIUrl":"https://doi.org/10.2174/1874834101609160195","url":null,"abstract":"The morphological control of the fracture has a great impact on the effectiveness of the hydraulic fracturing; the geostress difference between productive interval and barriers is one of controlling factors for the fracture height control. The propagation behavior of the hydraulic fracture was studied using the 3D physical simulation under conditions of the presence and absence of the interlaminar geostress difference. Combined with the result of the acoustic monitoring, the dynamic propagation process and the final shape of fracture were achieved. It shows that the lateral and vertical propagations of the fracture simultaneously occurred without the interlaminar geostress difference, and a fracture with round-shape face was finally presented. On the contrary, under the presence of the interlaminar geostress difference, due to the barrier effect of the high stress barrier on the vertical propagation of the fracture, the fracture height was obviously limited after the fracture propagated to the interval boundary. Therefore, the final shape of the fracture face was elliptical. Moreover, the extended finite element simulation was also adopted to analyze the propagation of the hydraulic fracture under two conditions mentioned above, and the result was consistent with that of the physical simulation. This verifies the feasibility of the extended finite element simulation method; therefore, this method was used to further simulate the fracture propagation behavior when several layers with different stiffness simultaneously exist. The result presents that during the fracture propagation, the fracture passed through the layer which has relatively weak stiffness and stopped before the layer which has stronger stiffness. Conclusions of this study can provide reference for the research of fracture propagation in complex geostress reservoirs.","PeriodicalId":377053,"journal":{"name":"The Open Petroleum Engineering Journal","volume":"58 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126369883","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

Analysis of the Cutting Features of the Damaged Rock by Shock Disturbance 冲击扰动损伤岩石切削特性分析

The Open Petroleum Engineering Journal Pub Date : 2016-08-26 DOI: 10.2174/1874834101609160159

Lou Lei, Wu Wanrong, Liang Xiangjing

引用次数: 2

Layer Selection Method of Ultra-Short Radius Horizontal Wells 超短半径水平井选层方法

The Open Petroleum Engineering Journal Pub Date : 2016-08-26 DOI: 10.2174/1874834101609160169

Er-long Yang, Huan Li, Huijuan Gao, J. Jia, Meng Qi

{"title":"Layer Selection Method of Ultra-Short Radius Horizontal Wells","authors":"Er-long Yang, Huan Li, Huijuan Gao, J. Jia, Meng Qi","doi":"10.2174/1874834101609160169","DOIUrl":"https://doi.org/10.2174/1874834101609160169","url":null,"abstract":"Study on the technology that sidetracking horizontal wells with ultra-short radius to select boundary layer has certain practical meaning. But recently this kind of research, especially the study on sidetracking position for horizontal well, is less or even none. In this paper, on the basis of the potential superposition method and the equivalent flowing resistance method, the cumulative oil production calculation model of the horizontal well after sidetracking is established. Then the dimensionless height from the top is introduced to modify the model with the means of numerical simulation. Therefore set up the relationship between the cumulative oil production and six factors such as cumulative oil production, effective thickness, the dimensionless height from the top, average permeability, oil and water wells, the average remaining oil saturation and completeness of drilling stage for horizontal well. By combining break-even analysis, layer selection method of ultra-short radius horizontal wells is determined. A relevant chart is also obtained. The method established in this paper can help to choose the optimal layer of sidetracking horizontal well with ultra-short radius.","PeriodicalId":377053,"journal":{"name":"The Open Petroleum Engineering Journal","volume":"60 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115074055","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Experimental Study on the Explosion of Gasoline-air Mixture in Reduced-scale Storage Tank 汽油-空气混合气在小型储罐内爆炸的实验研究

The Open Petroleum Engineering Journal Pub Date : 2016-07-29 DOI: 10.2174/1874834101609160150

Yi Zhou, Yang Du, Xiao-gang Zhao, Peili Zhang, Sheng Qi

{"title":"Experimental Study on the Explosion of Gasoline-air Mixture in Reduced-scale Storage Tank","authors":"Yi Zhou, Yang Du, Xiao-gang Zhao, Peili Zhang, Sheng Qi","doi":"10.2174/1874834101609160150","DOIUrl":"https://doi.org/10.2174/1874834101609160150","url":null,"abstract":"Fire and explosion accidents often occur in storage tanks leading to great economic loss and serious casualties during the working, operation and maintenance. This paper established a reduced-scale storage tank experimental system, and then the explosion characteristics of gasoline-air mixture in storage tank were studied. The experimental results show that several parameters (such as concentration of gasoline-air mixture, initial temperature of gasoline-air mixture, initial O2 and N2 contained in the storage tank) have very important influence on the gasoline-air mixture explosion and its explosion products. The upper and lower explosion limits of gasoline-air mixture are about 0.86% and 4.3% HC respectively according to the experimental results, and the critical explosion concentration is about 2.5% HC. The explosion of gasoline-air mixture under different initial temperatures in the concentration of 2.5% was carried out to find out that the biggest explosion overpressure is at the initial temperature of 308 K. The concentrations of explosion products namely CO and CO2 are closely related to the initial concentration of gasoline-air mixture, and the critical initial concentration of gasoline-air mixture to determine the higher and lower concentrations of CO and CO2 in explosion products is around 2.5% HC. Meanwhile, the ignition of gasoline-air mixture under various concentrations of premixed N2 and O2 in the storage tank was carried out, and the results show that the ignition of gasoline-air mixture with the concentration of 2.0% HC is impossible when the concentration of O2 is below 18.80%.","PeriodicalId":377053,"journal":{"name":"The Open Petroleum Engineering Journal","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-07-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122762578","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

Applying Sustainable Development Principles and Sustainable Operating Practices in Shale Oil and Gas Production 在页岩油气生产中应用可持续发展原则和可持续操作实践

The Open Petroleum Engineering Journal Pub Date : 2016-06-30 DOI: 10.2174/18748341016090100137

D. J. Shields

{"title":"Applying Sustainable Development Principles and Sustainable Operating Practices in Shale Oil and Gas Production","authors":"D. J. Shields","doi":"10.2174/18748341016090100137","DOIUrl":"https://doi.org/10.2174/18748341016090100137","url":null,"abstract":"Shale oil/gas is one of the most rapidly growing types of unconventional fossil fuel development and the abundance of this resource has postponed peak oil and gas. Physical scarcity of hydrocarbons is now less likely to occur in the near future; however, the likelihood of social scarcity is increasing. Despite the clear economic benefits of production in terms of jobs, tax revenue, and the provision of energy resources and industrial feedstocks, there is hostility toward shale oil/gas extraction in many parts of the world. This is due to concerns about how environmental, social, and economic impacts are managed and mitigated,and how risks and benefits are distributed among industry, governments and civil society.The application of sustainable development principles and sustainable operating practices is recommended as a partial remedy for this situation. Sustainability accounting frameworks based on criteria and indicators of sustainability and best practice codes of conduct represent two possible approaches for tracking how sustainable a firm’s practices are. These also provide a foundation for corporate social responsibility and can assist firms in gaining social license to operate. Also needed are estimates of a given operation’s net contribution to sustainable development. Possible methods include benchmarking against industry standards,achieving mature business conduct, gaining sustainability certification, demonstrated use of both design for environment and shared value creation methodologies, and integrated sustainability assessment. Conceptual progress has been made in applying sustainability to shale oil/gas; however, significant progress in applying these tools and methods in the field is needed because the sector tends to be judged by the behavior of the least responsible firm. Moreover, if best practices and shared value creation are set aside during the current or a future downturn, public cynicism about the sector will increase, and social license may be lost and even more difficult to regain.","PeriodicalId":377053,"journal":{"name":"The Open Petroleum Engineering Journal","volume":"93 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129046720","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Shale Reservoir-Centric Completions 以页岩储层为中心的完井

The Open Petroleum Engineering Journal Pub Date : 2016-06-30 DOI: 10.2174/1874834101609010092

J. Spaid, J. Dahl, R. Dusterhoft, S. Siddiqui, E. Holderby, B. McDaniel

{"title":"Shale Reservoir-Centric Completions","authors":"J. Spaid, J. Dahl, R. Dusterhoft, S. Siddiqui, E. Holderby, B. McDaniel","doi":"10.2174/1874834101609010092","DOIUrl":"https://doi.org/10.2174/1874834101609010092","url":null,"abstract":"In North America, the transition from more conventional reservoirs into tight, basin-centered gas and now source shales has caused the industry to change the way reservoir performance is being assessed, measured, and documented. Historically in conventional reservoirs the reservoir quality was carefully examined on a well by well basis to determine reserves in place and exploitation plans. For unconventional reservoirs, however, the commercializing of such plays quickly became centered on horizontal drilling of long laterals combined with massive volume, high rate multi-stage hydraulic fracturing. In that environment, completion design and hydraulic fracturing have become more of a statistical process; additionally, incremental improvement and innovation are used to create a treatment schedule often replicated across an entire field without consideration of reservoir variability across a lateral. Based upon vertical well experience, the fracture initiation points can be carefully selected by identifying the locations within the well that are best to perforate. In a horizontal well, however, the location of the lateral defines the fracture initiation points anywhere along the well, so the stratigraphic location of the well lateral becomes critical in non-homogeneous shale plays. To address this, engineers and geoscientists can identify important parameters necessary for optimum completion design, and earth modelling can then be used as a tool to capture and model these properties across the asset making critical information available as needed for drilling, completion, and production operations.","PeriodicalId":377053,"journal":{"name":"The Open Petroleum Engineering Journal","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121386168","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Induced Microseismicity: Short Overview, State of the Art and Feedback on Source Rock Production 诱发微震活动:简要概述、最新进展和烃源岩生产反馈

The Open Petroleum Engineering Journal Pub Date : 2016-06-30 DOI: 10.2174/1874834101609010055

J. Deflandre

引用次数: 2

Some Comments on Shale Opportunities 对页岩气发展机遇的几点看法

The Open Petroleum Engineering Journal Pub Date : 2016-06-30 DOI: 10.2174/1874834101609010046

Peter Gaffney

引用次数: 0