scholarly journals Geological and Engineering Integrated Shale Gas Sweet Spots Evaluation Based on Fuzzy Comprehensive Evaluation Method: A Case Study of Z Shale Gas Field HB Block

Energies ◽  
2022 ◽  
Vol 15 (2) ◽  
pp. 602
Author(s):  
Shiqi Liu ◽  
Yuyang Liu ◽  
Xiaowei Zhang ◽  
Wei Guo ◽  
Lixia Kang ◽  
...  
Keyword(s):  
Shale Gas ◽  
Evaluation Method ◽  
Comprehensive Evaluation ◽  
Fuzzy Comprehensive Evaluation ◽  
Fuzzy Mathematics ◽  
Gas Field ◽  
Fuzzy Comprehensive Evaluation Method ◽  
Comprehensive Evaluation Method ◽  
Multiple Parameters ◽  
Sweet Spots

As an emerging unconventional energy resource, shale gas has great resource potential and developmental prospects. The effective evaluation of geological sweet spots (GSS), engineering sweet spots (ESS) and comprehensive sweet spots (CSS) is one of the main factors for a high-yield scale and economic production of shale gas. Sweet spot evaluation involves a comprehensive analysis based on multiple parameters. Conventional evaluation methods consider relatively simple or single factors. Although the main influencing factors are understood, the influence of different factors is as of yet unknown, and a comprehensive consideration may strongly affect the evaluation results. In this paper, the fuzzy mathematics method is introduced for shale gas sweet spot evaluation. With the help of fuzzy mathematics tools, such as membership function, the objective of comprehensive sweet spots evaluation based on multiple parameters is realized. Additionally, the reliability of the evaluation of sweet spots is improved. Firstly, previous research results are used for reference, and the evaluation factor system of geological and engineering sweet spots of shale gas is systematically analyzed and established. Then, the basic principle of the fuzzy comprehensive evaluation method is briefly introduced, and a geological engineering integrated shale gas sweet spots evaluation method, based on the fuzzy comprehensive evaluation method, is designed and implemented. Finally, the data from HB blocks in the Z shale gas field in China are adopted. According to the evaluation results, the modified method is tested. The results show that the method proposed in this paper can synthesize a number of evaluation indices, quickly and effectively evaluate the GSS, ESS and CSS in the target area, and the results have high rationality and accuracy, which can effectively assist in well-pattern deployment and fracture design.

Evaluation of Jujube Beverage Prescriptions with Fuzzy Mathematics

2011 ◽  
Vol 271-273 ◽  
pp. 573-576 ◽  
Author(s):  
Han Gao ◽  
Su Fang Fu
Keyword(s):  
Citric Acid ◽  
Sensory Evaluation ◽  
Evaluation Method ◽  
Comprehensive Evaluation ◽  
Fuzzy Comprehensive Evaluation ◽  
Fuzzy Mathematics ◽  
Fuzzy Comprehensive Evaluation Method ◽  
Comprehensive Evaluation Method

The effects of different prescriptions on the sensory evaluation of jujube beverages were investigated with the method of fuzzy comprehensive evaluation, in which taste, color, flavor, and body were taken as the evaluation factors with proper weights. The results showed that the fuzzy comprehensive evaluation method could differentiate the grades of different products objectively and accurately. The optimum prescription was found as follows: fermented jujube puree of 90%, sugar of 8%, honey of 0.5%, citric acid of 0.15% as well as proper compound stabilizer.

Analysing the Ecological Environment Greening of the Poyang Lake by Using the Fuzzy Comprehensive Evaluation Method

2014 ◽  
Vol 1073-1076 ◽  
pp. 1141-1144
Author(s):  
Min Xie ◽  
Chun Hua Li
Keyword(s):  
Evaluation Method ◽  
Poyang Lake ◽  
Comprehensive Evaluation ◽  
Fuzzy Comprehensive Evaluation ◽  
Ecological Environment ◽  
Fuzzy Mathematics ◽  
Fuzzy Comprehensive Evaluation Method ◽  
Comprehensive Evaluation Method ◽  
Mathematics Method

As a fuzzy mathematics method, fuzzy comprehensive evaluation method is used in various fields, and achieves good results. The purpose of this paper is to use this method to analyze ecological environment greening of the poyang lake. After obtaining the relevant data, it is concluded that the present ecological environment greening of poyang lake is good by using the fuzzy mathematics comprehensive evaluation method.

Research on Model of Comprehensive Fuzzy Assessment of Projects Post Evaluation

2011 ◽  
Vol 261-263 ◽  
pp. 566-570
Author(s):  
Hong Zhang Zhu ◽  
Ji Bo Hu
Keyword(s):  
Mathematical Analysis ◽  
Evaluation Method ◽  
Comprehensive Evaluation ◽  
Qualitative Evaluation ◽  
Fuzzy Comprehensive Evaluation ◽  
Fuzzy Mathematics ◽  
Fuzzy Comprehensive Evaluation Method ◽  
Comprehensive Evaluation Method ◽  
Post Evaluation ◽  
Fuzzy Assessment

We generally use methods of statistical forecasting and antithesis in projects post evaluation, but they can only be used as a qualitative evaluation but as a quantitative evaluation. Based on the fuzzy mathematics, this text presents a better quantitative mathematical analysis-fuzzy comprehensive evaluation method. And then, it established a model of comprehensive fuzzy assessment of projects post evaluation. At last, it illustrate that the model of comprehensive fuzzy assessment can evaluate projects post evaluation accurately and quantitatively.

The Assessment and Research of Seismic Performance for Large-Scale Bridge Based on Fuzzy Mathematics

2011 ◽  
Vol 255-260 ◽  
pp. 1125-1129
Author(s):  
Da Wei Zheng ◽  
Li Xiao Qi
Keyword(s):  
Seismic Performance ◽  
Basic Principle ◽  
Large Scale ◽  
Evaluation Method ◽  
Comprehensive Evaluation ◽  
Fuzzy Comprehensive Evaluation ◽  
Fuzzy Mathematics ◽  
Fuzzy Comprehensive Evaluation Method ◽  
Comprehensive Evaluation Method ◽  
Different Levels

Guantifying the aseismatic factor of bridge and determining the factor domain,the weight and evaluation vector in different levels using the basic principle of fuzzy mathematics.Besides, the aseismatic performance of a large-scale bridge in Sichuan were studied and analysised by using the fuzzy comprehensive evaluation method.

Design and Implement of the Urban Bridge Cluster Monitoring Online Assessment System

2013 ◽  
Vol 351-352 ◽  
pp. 1298-1301
Author(s):  
Ling Zhi Xi ◽  
Yi Li ◽  
Chang Zhou
Keyword(s):  
Monitoring System ◽  
Evaluation Method ◽  
Comprehensive Evaluation ◽  
Fuzzy Comprehensive Evaluation ◽  
Condition Assessment ◽  
Assessment System ◽  
Fuzzy Mathematics ◽  
Fuzzy Comprehensive Evaluation Method ◽  
Comprehensive Evaluation Method ◽  
Communication Signal

Bridge health monitoring system (BHMS) is a package of technologies for structural monitoring, control, maintenance and management. Making use of the fusion of technologies from different disciplines, such as sensing, communication, signal processing, system identification, etc., the system is empowered to simultaneously get all kinds of information which reflect the safety conditions of bridge structure, and provide scientific proof for the analysis of bridge health. The assessment method is the core of the BHMS. In the conventional assessment procedure, there is significant influence of subjective factors involved. A feasibility study on the use of fuzzy comprehensive evaluation method in the bridge condition assessment is presented in this paper. The applications of fuzzy mathematics in condition assessment of bridges were discussed. Based on the research of present methods, analytical hierarchy process and fuzzy mathematics were integrated and applied in condition assessment of the project of main roads bridge Online Safety Monitoring Management System in Hangzhou (Phase II), a web-based urban bridge cluster monitoring system have been established. From a continuous beam bridge case study, it is observed that the fuzzy comprehensive evaluation method is capable of simulating the bridge condition evaluation process and has a good application.

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