Development, Application and Effect Evaluation of the Remote-controlled Automated Needle Valve Intermittent Production System in the L Well Block in China
Zhongbo Zhai,
Shiwei Qi,
Haowen Jia,
Yongbo Cao,
Fangli Du,
Jiangwei Bo,
Mingshan Tian,
Lele Hao
Issue:
Volume 10, Issue 1, March 2022
Pages:
1-9
Received:
30 January 2022
Accepted:
16 February 2022
Published:
25 February 2022
Abstract: In order to solve the problem of liquid loading, some water-produced gas wells use intermittent production mode to produce: shut in gas wells to restore energy during the closing phase, and open up to carry the liquid to surface by the high velocity gas during well opening phase, which is cost effective. However, some wells need frequent opening and closing or adjusting gas flow, manual opening and closing is easily influenced by external interference factors (road conditions, weather, public relation issue, etc.), and cannot guarantee production time for intermittent producing well. In order to realize the remote-control and automation for these wells, the remote-control automated needle valve intermittent production system was developed and successfully applied to the L well block. The gas rate, production time and economy before and after the smart needle valve installed was compared to do the performance assessment. The results show that: (1) the stability of the remote-control automated needle valve intermittent production system is good, and it can meet the requirments of the remote automated opening and closing of gas wells. (2) After the installation of the remote-controlled automated needle valve system, 71% of the gas wells have a stable gas increase, 100% of the gas wells have a higher well opening time, and the liquid unloading in the gas wells has been significantly improved. The average gas production increased from 1.75×104 m3/d to 1.87×104 m3/d, which was 6.86% higher than that before installation. The well opening time of 7 wells increased by 5.16% on average. (3) Compared with manual operation, the comprehensive economic performance of the remote-controlled automated needle valve opening system is more excellent. The remote-controlled automated needle valve opening system can remotely intelligently control the intermittent production of gas wells, which has significant economic benefits and high application value and worth further spreading.
Abstract: In order to solve the problem of liquid loading, some water-produced gas wells use intermittent production mode to produce: shut in gas wells to restore energy during the closing phase, and open up to carry the liquid to surface by the high velocity gas during well opening phase, which is cost effective. However, some wells need frequent opening an...
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Selection of Optimal Locations for Electricity Generation Using Concentrated Solar Power Technologies in Ghana
Richmond Kwesi Amoah,
Solomon Nunoo,
Joseph Cudjoe Attachie
Issue:
Volume 10, Issue 1, March 2022
Pages:
10-20
Received:
23 February 2022
Accepted:
23 March 2022
Published:
29 March 2022
Abstract: The selection of an optimum location for the installation of a Concentrated Solar Power (CSP) plant is very vital to its overall performance. Any selected location should suitably satisfy some favourable selection criteria such as high direct normal irradiance, high ambient temperature, lower wind speed, lower level of cloud cover and availability of a source of water. In this paper, the selection of an optimal location(s) for a CSP plant in Ghana is achieved using the Analytical Hierarchy Process (AHP) for the weighting of the selected criteria and then using a set of Multi-Criteria Decision-Making (MCDM) methods for the ranking of the various alternatives. The MDCM methods used in this work include the Vise Kriterijumsa Optimizacija I Kompromisno Resenje (VIKOR), Technique for Order of Performance by Similarity to Ideal Solution (TOPSIS), and Complex Proportional Assessment (COPRAS). The results indicate that VIKOR and COPRAS gave very closely related rankings while some of the rankings for the COPRAS were not closely related as compared to the other two methods. However, all three methods ranked Bawku, a town in the Upper East region of Ghana, as the most suitable location for the installation of a CSP plant. The other suitable locations, i.e., Navrongo, Yendi, Wa, Bolgatanga and Savelugu, for the installation of a CSP plant are in the northern part of the country.
Abstract: The selection of an optimum location for the installation of a Concentrated Solar Power (CSP) plant is very vital to its overall performance. Any selected location should suitably satisfy some favourable selection criteria such as high direct normal irradiance, high ambient temperature, lower wind speed, lower level of cloud cover and availability ...
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