The Key Technology Research of the Water Injection System Energy Saving for Super Low Permeability Reservoir in Changqing Oil Field

2012 ◽  
Vol 524-527 ◽  
pp. 1217-1222 ◽  
Author(s):  
Zhi Qiang Huang ◽  
Zhen Chen ◽  
Gang Zheng ◽  
Jian Qiang Xue ◽  
Xue Yuan Li
Keyword(s):  
Energy Consumption ◽  
Energy Saving ◽  
Large Scale ◽  
Water Injection ◽  
High Energy ◽  
Economic Benefits ◽  
Oil Field ◽  
Injection System ◽  
Low Permeability ◽  
Load Rate

With the characteristics of low permeability, pressure and abundance, it's extremely hard to exploit the super low permeability reservoirs in ChangQing oil field. For this reason, the water injection recovery technique has been widely used. Analysis showed that a serious problem of high energy consumption exist in the water injection system, the power consumption of which accounts for about 44%. And the energy cost of pump units reach up to 43%, it's the highest energy consumption link in the system. In this paper the load rate classification method (LRCM) is firstly adopted to statistical analyze water injection stations, which are divided into the owing and over load rate stations. As a result, the owing load rate stations accounts for 83.8%, with a serious phenomenon of the Big Horse Pull A Small Carriage, causing the large-scale backflow in the station, and the efficiency is low, the energy consumption is on the high side. Aimed at water injection stations with different load rate, the methods of reasonable shutting down the pumps, pump replacement, optimizing the transmission ratio and piston size, as well as the speed control technology have been used to make the outlet flow and actual demand reasonable matching. The test result shows that the energy saving technology is well targeted, simple, practical and low cost. The pump units’ efficiency improves obviously, the consumption reduces by 10%, which greatly improve the oilfield economic benefits.

Numerical Simulation Study on Advanced Water Injection for Fuyang Ultra-Low Permeability Fractured Reservoir

2013 ◽  
Vol 421 ◽  
pp. 286-289
Author(s):  
Hui Hui Kou ◽  
Xian Gui Liu ◽  
Han Min Xiao ◽  
Ling Hui Sun ◽  
Dong Dong Hou ◽  
...  
Keyword(s):  
History Matching ◽  
Large Scale ◽  
Water Injection ◽  
Sedimentary Facies ◽  
Oil Field ◽  
Water Flooding ◽  
Small Scale ◽  
Low Permeability ◽  
Fractured Reservoir ◽  
Production Ratio

According to the features of low porosity and low permeability fracture as well as small scale of channel development, frequent sedimentary facies changes of planar sandstone, poor connectivity, large variation of sequence thickness and great development difficulties for oil layer in Fuyang Oilfield. In this paper, on the basis of fully considered of fracture features, built a more accurate 3-D geological model. And on the basis of the history matching, determined the formation pressure maintenance level under different injection-production ratio and rational water-flooding timing by the simulation of the different programs in the process advanced water injection development. The results show that: the reasonable injection-production ratio of Fuyang oil layer is 1.4, and the rational water-flooding timing is three months after advanced water injection. This provides theoretical guidance for the large-scale development of Fuyang oil layer, and also provides the technical basis for the developing of the other low permeability fractured oil field by advanced water injection.

Energy Saving Design Method for Large Weak Electronic Circuit

2014 ◽  
Vol 513-517 ◽  
pp. 4127-4130
Author(s):  
Bo Yu ◽  
Li Song ◽  
Zhong Ming Wu
Keyword(s):  
Energy Consumption ◽  
Energy Saving ◽  
Circuit Design ◽  
Large Scale ◽  
Electronic Circuit ◽  
Design Method ◽  
High Energy ◽  
Proposed Model ◽  
Consumption Situation ◽  
High Energy Consumption

This paper mainly discusses the energy-saving design method for large weak electronic circuit. In large scale electronic circuit, there is no direct relevance between every two element modules. The traditional weak element circuit design concentrates in a single module, while ignoring module dependencies in energy-saving design, resulting in high energy consumption in large-scale electronic circuits. This paper proposes to establish the relevance energy-loss model for each model in the large-scale weak electronic circuit to obtain the energy consumption situation, and consider the energy consumption in module coordination to saving energy. The simulation results show that the proposed model used for large-scale energy weak circuit design can effectively reduce the energy consumption in weak circuit application.

Study of Energy-Saving Control in Oil Pumping Units Based on DTC Technology

2012 ◽  
Vol 433-440 ◽  
pp. 7119-7124
Author(s):  
Zhao Mei Xue
Keyword(s):  
Energy Saving ◽  
Direct Torque Control ◽  
High Energy ◽  
Economic Benefits ◽  
Control Device ◽  
Oil Field ◽  
Torque Control ◽  
Pumping Unit ◽  
Pumping Units ◽  
Energy Saving Control

The pumping unit is the main pumping equipment in the oil field. However, there widely exist such defects as low pumping efficiency, high energy consumption, much time and great efforts consumption in stroke adjustment etc. in the current pumping unit, resulting in serious waste of energy. Some energy-saving technologies in pumping units have been developed, but the effects are not quite good. Aiming at this situation, this paper introduces a new type of motor control theory - Direct Torque Control. By controlling the stator voltage, the technology achieves the direct control of the motor torque. Meanwhile, with the combination of the motor running condition of pumping units, study of energy-saving control based on DTC technology is carried out. It turns out that the energy-saving effect is significant according to the application and test results of the energy-saving control device in the oil field. Therefore, the control device can bring certain economic benefits and have the value of popularization and application.

Discussion on Architectural Design of Green Theatres in China

2013 ◽  
Vol 368-370 ◽  
pp. 15-20
Author(s):  
Xiang Rong Chen ◽  
Zhi Tao
Keyword(s):  
Sustainable Development ◽  
Energy Consumption ◽  
Energy Saving ◽  
Architectural Design ◽  
Large Scale ◽  
High Energy ◽  
Basic Principles ◽  
Site Investigations ◽  
Cost Of Construction ◽  
High Energy Consumption

The extensive construction of urban theatres in China has entered a period of prosperity, but there are many problems, such as high cost of construction, too large scale, too many facilities, too little use, and excessive energy consumption, etc. It is not only contrary to the green environmental protection and energy saving policies that are advocated in our country, but also not accord with the requirement of sustainable development. In this paper, through site investigations and analysis on the newly built theatres in China, the high energy consumption tendency and its main causes in theater construction and design are summarized. Also, some basic principles related to the design of the theatres and the problems to be concerned have been discussed, therefore the reference and guidance for the architectural design of green theatres in china are provided.

Whole Life Cycle Energy-Saving Measures of Large-Scale Public Building

2011 ◽  
Vol 71-78 ◽  
pp. 4923-4926 ◽  
Author(s):  
Rong Jie Fang ◽  
Yun Bo Zhang ◽  
Deng Min Shen ◽  
Yong He ◽  
Li Wen Zhang
Keyword(s):  
Life Cycle ◽  
Energy Consumption ◽  
Energy Saving ◽  
Large Scale ◽  
High Energy ◽  
Public Building ◽  
Planning And Design ◽  
Save Energy ◽  
Set Up ◽  
Whole Life Cycle

Large-scale public building has high energy consumption and has great potential in saving it. It is necessary to do research on the calculation of energy consumption and raise some methods to save energy of large-scale public building. Basing on the theory of whole life cycle, the energy consumption of large-scale public building was analysed and the whole life cycle energy saving system was set up. What's more, it emphasized the importance of energy saving design at the stage of planning and design. Meanwhile, the paper not only analysed the whole life cycle energy saving contents and calculation formulas of large-scale public building by taking advantage of LCEA model, but also proposed some corresponding measures to save energy.

Energy Saving Measures of Oil and Gas Gathering System in Changqing Low Permeable Oilfield

2012 ◽  
Vol 512-515 ◽  
pp. 1137-1142
Author(s):  
Zhi Qiang Huang ◽  
Xue Yuan Li ◽  
Gang Zheng ◽  
Jian Qiang Xue ◽  
Zhen Chen
Keyword(s):  
Energy Consumption ◽  
Energy Saving ◽  
Large Scale ◽  
Oil And Gas ◽  
Frequency Control ◽  
Electric Energy ◽  
Large Power ◽  
Associated Gas ◽  
Load Rate ◽  
Oil Gas

Because of its property of low permeability, low pressure and low production, Changqing low permeable oilfield decreases rapidly in the initial potential stage and has low individual-well producing rate, which give rise to the overestimated oilfield production and large-scale ground construction project of gathering system. Eventually, the problem of “big Marathi car” in oil gathering system generated excessive energy consumption. It is multi-purpose station, pumping station and block station that turn out to be the main energy consumption point, which consume over 90% of system electric energy consumption. Besides, energy like natural gas is dissipated so severely that the utilization ratio of associated gas is less than 30%. This is obtained by analyzing energy distribution of system. For the seriously power-wasting problems in gathering system, energy saving technologies of small power pump replacing large power pump, intermittent pipelining oil by liquid level automatically controlled and double speed adjustment based on frequency control apply to the effective utilization of electric energy, which using oil pumps load rate as energy evaluation criterion. Applying technologies of helical down hole oil-gas separation and oil-gas airtight gathering to recover associated gas effectively gives conspicuous energy saving effect.

Nanotechnology Helps Decrease Pressure, Increase Injection in Offshore China Oil Field

2021 ◽  
Vol 73 (09) ◽  
pp. 58-59
Author(s):  
Chris Carpenter
Keyword(s):  
Water Injection ◽  
Injection Pressure ◽  
Gas Production ◽  
Oil Field ◽  
Water Flooding ◽  
Injection System ◽  
Bohai Bay ◽  
Reservoir Properties ◽  
Positive Effects ◽  
Offshore Technology

This article, written by JPT Technology Editor Chris Carpenter, contains highlights of paper OTC 30407, “Case Study of Nanopolysilicon Materials’ Depressurization and Injection-Increasing Technology in Offshore Bohai Bay Oil Field KL21-1,” by Qing Feng, Nan Xiao Li, and Jun Zi Huang, China Oilfield Services, et al., prepared for the 2020 Offshore Technology Conference Asia, originally scheduled to be held in Kuala Lumpur, 2–6 November. The paper has not been peer reviewed. Copyright 2020 Offshore Technology Conference. Reproduced by permission. Nanotechnology offers creative approaches to solve problems of oil and gas production that also provide potential for pressure-decreasing application in oil fields. However, at the time of writing, successful pressure-decreasing nanotechnology has rarely been reported. The complete paper reports nanopolysilicon as a new depressurization and injection-increasing agent. The stability of nanopolysilicon was studied in the presence of various ions, including sodium (Na+), calcium (Ca2+), and magnesium (Mg2+). The study found that the addition of nanomaterials can improve porosity and permeability of porous media. Introduction More than 600 water-injection wells exist in Bohai Bay, China. Offshore Field KL21-1, developed by water-flooding, is confronted with the following challenges: - Rapid increase and reduction of water-injection pressure - Weak water-injection capacity of reservoir - Decline of oil production - Poor reservoir properties - Serious hydration and expansion effects of clay minerals To overcome injection difficulties in offshore fields, conventional acidizing measures usually are taken. But, after multiple cycles of acidification, the amount of soluble substances in the rock gradually decreases and injection performance is shortened. Through injection-performance experiments, it can be determined that the biological nanopolysilicon colloid has positive effects on pressure reduction and injection increase. Fluid-seepage-resistance decreases, the injection rate increases by 40%, and injection pressure decreases by 10%. Features of Biological Nanopolysilicon Systems The biological nanopolysilicon-injection system was composed of a bioemulsifier (CDL32), a biological dispersant (DS2), and a nanopolysilicon hydrophobic system (NP12). The bacterial strain of CDL32 was used to obtain the culture colloid of biological emulsifier at 37°C for 5 days. DS2 was made from biological emulsifier CDL32 and some industrial raw materials described in Table 1 of the complete paper. Nanopolysilicon hydrophobic system NP12 was composed of silicon dioxide particles. The hydrophobic nanopolysilicons selected in this project featured particle sizes of less than 100 nm. In the original samples, a floc of nanopolysilicon was fluffy and uniform. But, when wet, nanopolysilicon will self-aggregate and its particle size increases greatly. At the same time, nanopolysilicon features significant agglomeration in water. Because of its high interface energy, nanopolysilicon is easily agglomerated, as shown in Fig. 1.

Research on Energy-Saving Algorithms with Migration Energy Consumption in Heterogeneous Cloud Environment

2014 ◽  
Vol 986-987 ◽  
pp. 1383-1386
Author(s):  
Zhen Xing Yang ◽  
He Guo ◽  
Yu Long Yu ◽  
Yu Xin Wang
Keyword(s):  
Cloud Computing ◽  
Energy Consumption ◽  
Energy Saving ◽  
Large Scale ◽  
Electrical Energy ◽  
Cloud Environment ◽  
Migration Energy ◽  
Live Migration ◽  
Large Scale Data ◽  
Heterogeneous Cloud

Cloud computing is a new emerging paradigm which delivers an infrastructure, platform and software as services in a pay-as-you-go model. However, with the development of cloud computing, the large-scale data centers consume huge amounts of electrical energy resulting in high operational costs and environment problem. Nevertheless, existing energy-saving algorithms based on live migration don’t consider the migration energy consumption, and most of which are designed for homogeneous cloud environment. In this paper, we take the first step to model energy consumption in heterogeneous cloud environment with migration energy consumption. Based on this energy model, we design energy-saving Best fit decreasing (ESBFD) algorithm and energy-saving first fit decreasing (ESFFD) algorithm. We further provide results of several experiments using traces from PlanetLab in CloudSim. The experiments show that the proposed algorithms can effectively reduce the energy consumption of data center in the heterogeneous cloud environment compared to existing algorithms like NEA, DVFS, ST (Single Threshold) and DT (Double Threshold).

scholarly journals Study on Energy-saving Insulation Materials in the Building’s Exterior

2015 ◽  
Vol 4 (1) ◽  
pp. 4
Author(s):  
Yang Zhang ◽  
Yazhi Hu
Keyword(s):  
Energy Consumption ◽  
Energy Saving ◽  
Construction Industry ◽  
New Technologies ◽  
High Energy ◽  
Insulation Material ◽  
Curtain Wall ◽  
Construction Engineering ◽  
Technology Application ◽  
Insulation Materials

<p>Construction industry has been one of China's energy guzzlers, if we can reduce the energy consumption of the building industry through the use of new materials or new technologies, which will have a significant impact on the development of economy and society. The status quo of China's construction industry, high energy consumption, paper use energy-saving technologies in the field of construction works to expand the analysis, discusses the necessity of the construction industry currently uses energy-saving insulation materials and analyzes the current energy field of construction engineering technology application status, on the basis of focus on the application of energy-saving insulation materials in construction, particularly in the new system and the new glass curtain wall insulation material in construction applications, which further enhance the energy-saving technology within the field of construction engineering the application level has a certain reference.</p>

Energy-Efficiency in Cloud Data Centers

2013 ◽  
pp. 241-263
Author(s):  
Burak Kantarci ◽  
Hussein T. Mouftah
Keyword(s):  
Cloud Computing ◽  
Energy Consumption ◽  
Data Center ◽  
Energy Efficient ◽  
Large Scale ◽  
Data Centers ◽  
High Energy ◽  
It Services ◽  
Data Center Network ◽  
Cloud Data

Cloud computing aims to migrate IT services to distant data centers in order to reduce the dependency of the services on the limited local resources. Cloud computing provides access to distant computing resources via Web services while the end user is not aware of how the IT infrastructure is managed. Besides the novelties and advantages of cloud computing, deployment of a large number of servers and data centers introduces the challenge of high energy consumption. Additionally, transportation of IT services over the Internet backbone accumulates the energy consumption problem of the backbone infrastructure. In this chapter, the authors cover energy-efficient cloud computing studies in the data center involving various aspects such as: reduction of processing, storage, and data center network-related power consumption. They first provide a brief overview of the existing approaches on cool data centers that can be mainly grouped as studies on virtualization techniques, energy-efficient data center network design schemes, and studies that monitor the data center thermal activity by Wireless Sensor Networks (WSNs). The authors also present solutions that aim to reduce energy consumption in data centers by considering the communications aspects over the backbone of large-scale cloud systems.

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