A Fuzzy Method to Quantitatively Evaluate the Effect of Foam Deliquification in Gas Wells

2021 ◽  
Author(s):  
Min Jia ◽  
Jianjun Zhang ◽  
Xiuling Han ◽  
Junfeng Shi ◽  
Donghong Guo ◽  
...  
Keyword(s):  
Production Rate ◽  
Evaluation Method ◽  
Comprehensive Evaluation ◽  
Gas Production ◽  
Rate Of Change ◽  
Daily Injection ◽  
Gas Wells ◽  
Gas Field ◽  
Foaming Agents ◽  
Factors Affecting

Abstract Deliquification is the primary technique for stabilizing gas production and improving gas recovery in gas fields producing water, and foam deliquification is the key subject of research for the purpose of enhancing gas production and cutting down cost. However, there is no systematic method to evaluate and compare the effects of foam deliquification in gas wells in various conditions. Aiming at the above problem, a new fuzzy quantitative evaluation method for foam deliquification is proposed. The method focus on four indicators, namely, rate of change in daily gas production, rate of change in daily water production, rate of change in the difference between tubing and casing pressures, and rate of change in daily injection cost. The evaluation results are calculated by the linear analysis, hierarchy analysis and fuzzy relation synthesis operator. The method has been applied to 30 foam deliquification wells in Sulige gas field and Chongqing gas field, and the comprehensive index of foam deliquification effect is calculated. The advantage of this method is that the technical and economic factors affecting foam deliquifiction, the membership relationships of various indicators, as well as the weight coefficients of the indicators are integratedly considered. It can be used for comprehensive evaluation and quantitative comparison of foam deliquification effects in gas wells in various conditions, assisting in determining candidate wells for foam deliquification, and guiding the selection of foaming agents.

scholarly journals A New Production-Splitting Method for the Multi-Well-Monitor System

Energies ◽  
2020 ◽  
Vol 13 (21) ◽  
pp. 5677
Author(s):  
Jiaqi Zhang ◽  
Chang He ◽  
Jichen Yu ◽  
Bailu Teng ◽  
Wanjing Luo ◽  
...  
Keyword(s):  
Production Rate ◽  
Splitting Method ◽  
Monitor System ◽  
Gas Wells ◽  
New Production ◽  
Gas Field ◽  
Single Well ◽  
Multi Phase Flow ◽  
Multi Phase ◽  
The Cost

In order to reduce the cost of wellheads, the production rate of the gas wells in the Hechuan Gas Field are mostly measured in groups, which raises a stringent barrier for industries to determine the production rate of each single well. The technique for determining the production of a single well from the production of the well-group can be called the production splitting method (PSM). In this work, we proposed a novel PSM for the multi-well-monitor system (MWMS) on the basis of the Beggs and Brill (BB) correlation. This proposed method can account for the multi-phase flow together with the features of the pipelines. Specifically, we discretize the pipeline into small segments and recognize the flow pattern in each segment. The pressure drop along the pipeline is calculated with the Beggs and Brill correlation, and the production of each well is subsequently determined with a trial method. We also applied this proposed method to a field case, and the calculated results show that the results from this work undergo an excellent agreement with the field data.

A New Method to Predict Gas Production Based on Fuzzy BP Artificial Neural Network

2014 ◽  
Vol 1044-1045 ◽  
pp. 688-691
Author(s):  
Ran Zhang ◽  
Jun Zhou ◽  
Cheng Yong Li
Keyword(s):  
Neural Network ◽  
Bp Neural Network ◽  
Evaluation Method ◽  
Comprehensive Evaluation ◽  
Fuzzy Comprehensive Evaluation ◽  
Gas Production ◽  
Gas Well ◽  
Well Productivity ◽  
Qualitative Factors ◽  
Productivity Prediction

BP neural network has been successfully used in the gas well productivity prediction, but as a result of neural network is sensitive to the number of input parameters, we had to ignore some factors that is less important to the gas well productivity. In addition, the existing various productivity prediction method cannot consider the influence of some important qualitative factors. This article integrated the advantages of fuzzy comprehensive evaluation and BP neural network, fuzzy comprehensive evaluation method is used to construct the BP neural network's input matrix, and BP neural network learning function is used to solve the connection weights, so as to achieve the aim of predicting gas production. This method not only can consider as many factors influence on gas well production, ut also can consider qualitative factors, so the forecast results of the new model are more realistically close to the actual production situation of reservoirs.

Acid Fracturing of Deep Gas Wells Using a Surfactant-Based Acid: Long-Term Effects on Gas Production Rate

2006 ◽  
Author(s):  
Hisham A. Nasr-El-Din ◽  
Saad M. Al-Driweesh ◽  
Kirk Michael Bartko ◽  
Hamed Hasan Al-Ghadhban ◽  
Venkateshwaran Ramanathan ◽  
...  
Keyword(s):  
Production Rate ◽  
Gas Production ◽  
Long Term Effects ◽  
Gas Wells ◽  
Acid Fracturing

Optimizing Tubing and Liner Completion Design to Improve Gas Production from Existing Wells: Case Study for ADNOC Onshore Field Abu Dhabi, UAE

2021 ◽  
Author(s):  
Magdy Farouk Fathalla ◽  
Mariam Ahmed Al Hosani ◽  
Ihab Nabil Mohamed ◽  
Ahmed Mohamed Al Bairaq ◽  
Djamal Kherroubi ◽  
...  
Keyword(s):  
Gas Production ◽  
Base Case ◽  
Gas Wells ◽  
Production Rates ◽  
Liquid Loading ◽  
Gas Field ◽  
Well Production ◽  
Well Completion ◽  
The Impact

Abstract An onshore gas field contains several gas wells which have low–intermittent production rates. The poor production has been attributed to liquid loading issue in the wellbore. This study will investigate the impact of optimizing the tubing and liner completion design to improve the gas production rates from the wells. Numerous sensitivity runs are carried out with varying tubing and liner dimensions, to identity optimal downhole completions design. The study begins by identifying weak wells having severe gas production problems. Once the weak wells have been identified, wellbore schematics for those wells are studied. Simulation runs are performed with the current downhole completion design and this will be used as the base case. Several completion designs are considered to minimize the effect of liquid loading in the wells; these include reducing the tubing diameter but keeping the existing liner diameter the same, keeping the original tubing diameter the same but only reducing the liner diameter, extending the tubing to the Total Depth (TD) while keeping the original tubing diameter, and extending a reduced diameter tubing string to the TD. The primary cause of the liquid loading seems to be the reduced velocity of the incoming gas from the reservoir as it flows through the wellbore. A simulation study was performed using the various completion designs to optimize the well completion and achieve higher gas velocities in the weak wells. The results of the study showed significant improvement in gas production rates when the tubing diameter and liner diameter were reduced, providing further evidence that increased velocity of the incoming fluids due to restricted flow led to less liquid loading. The paper demonstrates the impact of downhole completion design on the productivity of the gas wells. The study shows that revisiting the existing completion designs and optimizing them using commercial simulators can lead to significant improvement in well production rates. It is also noted that restricting the flow near the sand face increases the velocity of the incoming fluid and reduces liquid loading in the wells.

Vibration Analysis of Pumps Units Based on Fuzzy Matter-Element

2012 ◽  
Vol 591-593 ◽  
pp. 2037-2041
Author(s):  
Kun Rong Huang ◽  
Han Qing Wang ◽  
Guo Xiang Lin ◽  
Yong Hui Tang
Keyword(s):  
Vibration Analysis ◽  
Evaluation System ◽  
Evaluation Method ◽  
Comprehensive Evaluation ◽  
General Procedure ◽  
Technical Condition ◽  
Pump Unit ◽  
Factors Affecting ◽  
Comprehensive Evaluation Method ◽  
Major Factors

This paper analysises and evaluates vibration situation and gives the general procedure for vibration analysis of pumps units, which contain determination of each evaluation matter-element and comprehensive evaluation method based on matter-element. Evaluation matter-element is established by evaluation system of pumps vibration, aimed at a particular example. The factors affecting the vibration of the pump unit has three major factors of the mechanical, hydraulic, electrical, sub-factors of the three factors. According to the characteristics of the pump unit vibration and the current technical condition, the vibration is divided into five levels: most serious, more serious, normal, minor, and slight. The evaluation weight matter-element are established by using AHP, weight are determined by using the combination of AHP and entropy, finally comprehensive evaluation of pumps vibration performance is practiced. Thus, this evaluation is feasible and useful.

Depositional Environment And Vertical Distribution Based on Core Analysis to Evaluate The Production Rate of The Reservoir (Case Study: Arun Carbonate Reservoir, North Sumatra, Indonesia)

2020 ◽  
Author(s):  
M., W. Perdana
Keyword(s):  
Production Rate ◽  
Depositional Environment ◽  
Coastal Region ◽  
Secondary Data ◽  
Gas Production ◽  
Carbonate Reservoir ◽  
Petrographic Analysis ◽  
Gas Field ◽  
The North ◽  
North Sumatra

The Arun natural gas field is one of the world biggest gas fields by volume of reserves and this field was found in a coastal region within the North Sumatra Basin, Indonesia. This field has been producing gas and condensate since 1977. Based on Atmadibrata and Joenoes (1993) gas production in this field had increased at that time up to an average level of 3,300 million standard cubic feet per day (MMSCFD). The total daily volume of 2.230 MMSCFD was transported to the LNG plant for liquefaction and trade, 145 MMSCFD was provided to the household showcase and domestic market, 55 MMSCFD was utilized for fuel and 870 MMSCFD was reinjected into the reservoir in order to maximize condensate recovery. This study intends to understand the relationship between the depositional environment of the Arun field reservoir to the production rate of the reservoir. The data in this study is mainly secondary data and consists of geological properties (core description and petrographic analysis), geophysical properties (well logging) and petrophysical properties (porosity and permeability).

Influence Analysis of Reservoirs on River Health

2011 ◽  
Vol 368-373 ◽  
pp. 1241-1244
Author(s):  
Xue Lan Sun ◽  
Chun Hong Hu ◽  
Jing Qi Xie
Keyword(s):  
Evaluation Method ◽  
Comprehensive Evaluation ◽  
Yellow River ◽  
Fuzzy Comprehensive Evaluation ◽  
River Channel ◽  
River Health ◽  
Lower Yellow River ◽  
Factors Affecting ◽  
The Lower Yellow River ◽  
Primary Means

Based on the current situation of the Lower Yellow River channel, this paper analyses the factors affecting river health, points out that river channel health is the foundation and key to river health. It evaluates the Yellow River's downstream channel health using fuzzy comprehensive evaluation method and gets the conclusion that the Yellow River's downstream channel health has deteriorated in 50 years and has improved in the beginning of this century. This paper analyses and points out that the reservoir to regulate natural flow-sediment process is the primary means that the human impact on river health. The regulation of reservoir has duality that "excessive" regulation will seriously damage river health and "moderate" regulation can better maintain and restore river health. Coordination of flow-sediment relationship is the key to maintaining the health of the Lower Yellow River.

scholarly journals Research on the Data Analysis and Application on the Safety Production of Port Enterprises Based on the AHP-Fuzzy Comprehensive Evaluation Method

2021 ◽  
Vol 257 ◽  
pp. 03035
Author(s):  
Guodong Meng ◽  
Yukun Wang ◽  
Yanhua Hu ◽  
Hong Zhao
Keyword(s):  
Evaluation Method ◽  
Comprehensive Evaluation ◽  
Evaluation Model ◽  
Fuzzy Comprehensive Evaluation ◽  
Production Data ◽  
Actual Situation ◽  
Production Risk ◽  
Factors Affecting ◽  
Safe Production ◽  
Safety Production

The production process of port enterprises is complex, and the operation contents are diversified and dynamic. Thus, the factors affecting the safety production risk are numerous and complex. To better grasp the risk state of the safety production of the port enterprises, based on the requirements of relevant laws and regulations and the actual situation of safe production of port enterprises, in this study, the diversified safety production data of port enterprises was collected and analyzed, the three-level index system of safety production data for port enterprises was constructed, the evaluation model of safe production state for port enterprises based on AHP-fuzzy comprehensive evaluation was established, and the practical application was carried out in a large port enterprise. The evaluation results were highly consistent with the actual situation of safe production of port enterprises. This evaluation method can be used to make full use of the existing data sources of safety production of port enterprises to discover the prominent risks affecting safety production and control them, and effectively improve the level of safety production of port enterprises.

scholarly journals Analysis and Evaluation Research on the Influencing Factors of the Development of Local Agricultural Products

2021 ◽  
Vol 251 ◽  
pp. 02096
Author(s):  
Xin Wang
Keyword(s):  
Comparative Analysis ◽  
Evaluation System ◽  
Evaluation Method ◽  
Comprehensive Evaluation ◽  
Evaluation Research ◽  
Fuzzy Comprehensive Evaluation ◽  
Agricultural Products ◽  
Analytic Hierarchy ◽  
Factors Affecting ◽  
Comprehensive Evaluation Method

This article takes the development of agricultural products as the research object, through the analysis and induction of the factors affecting the development of agricultural products, applying the analytic hierarchy process and the fuzzy comprehensive evaluation method, taking the potato products of Ding xi and Lanzhou as examples, collecting relevant data, and verifying the evaluation through comparative analysis. The scientificity and rationality of the evaluation system are verified through comparative analysis.. This article provides reference for studying the factors affecting the development of agricultural products, and at the same time has important guiding significance for the development of local agricultural products.

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