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Collaborating Authors
Overview of Energy Storage Technologies and a Short-term Storage Application for Wind Turbines
Argyrou, Maria C. (Cyprus University of Technology) | Christodoulides, Paul (Cyprus University of Technology) | Marouchos, Christos C. (Cyprus University of Technology) | Kalogirou, Soteris A. (Cyprus University of Technology) | Florides, Georgios A. (Cyprus University of Technology) | Lazari, Lazaros (Cyprus University of Technology)
Abstract The spreading of renewables has become stronger due to the increased air pollution. On the other hand, the penetration of renewable energy technologies causes major problems to the stability of the grid. Along with the fluctuations of the renewable energy technologies production, storage is important for power and voltage smoothing. Thus, storage technologies have gained an increased attention considering the distributed generation. This paper presents an up to date comprehensive overview of energy storage technologies. It incorporates characteristics and functionalities of each storage technology, as well as their advantages and drawbacks compared with other storage technologies. A demonstration of a short-term energy storage application in a gridconnected small wind turbine is given. The circuit is operated at the maximum power point (MPP), succeeding its connection and synchronization with the low-voltage grid. It also utilizes the energy generated by the wind turbine when a fault appears for a short period of time, through the supercapacitor. Introduction In March 2007, the European Council set some goals for 2020 to face the problems of the environment: the reduction of 20% of total energy consumption, the 20% contribution of Renewable Energies to total energy production and the 20% reduction of Greenhouse gases below 1990 emissions (20-20-20 targets). Therefore, the development of the Renewable Energy Sources (RES) is more than a necessity. Wind energy is one of the most important and promising renewable energy sources. It is also a mature, clean and competitive resource. Wind turbine is the technology that converts the wind energy into rotational mechanical energy and then into electricity. Wind farms can be installed both onshore and offshore. Important advantages of the offshore installation are the ability to use larger wind turbines and larger power plants than in onshore, and the presence of strong and powerful offshore wind speeds. The main drawbacks of the off shore wind farms are the high installation and connection to the grid cost and the maintenance requirements. A common disadvantage of wind energy is that the wind behaves in a stochastic and not deterministic manner.
Another class of nuclear batteries doesn't rely on fission for power production. Radioisotope decay can be harnessed to yield electricity using thermal/nonthermal conversion. In the nonthermal conversion, the radioactive particles fall on semiconductors, or the particles are used to produce photons and are then converted to electricity. The challenges that remain are the expensive radioactive particles and low power-density application. There are research groups in Idaho National Laboratory, Los Alamos National Laboratory, NASA, and Westinghouse, which offer more information on nuclear batteries (Chandler, 2021; Singh, et al., 2016).
- North America > United States > New Mexico > Los Alamos County > Los Alamos (0.25)
- North America > United States > Idaho (0.25)
- Europe > Austria > Styria (0.16)
- Energy > Renewable (1.00)
- Energy > Energy Storage (1.00)
- Transportation > Infrastructure & Services (0.73)
- (2 more...)
Extending the Life Cycle of Old Wells: Fracturing and Replenishing Formation Energy at the Same Time
Chunpeng, Wang (Research institute of petroleum exploration and development CNPC) | Weiyao, Zhu (University of science and technology Beijing) | Weixiang, Cui (University of science and technology Beijing) | Min, Zhang (Research institute of petroleum exploration and development CNPC) | Xueqin, Huang (Research institute of petroleum exploration and development CNPC) | Shuzhe, Shi (Research institute of petroleum exploration and development CNPC) | Zhen, Nie (Research institute of petroleum exploration and development CNPC)
Abstract In order to extend the life cycle of the developed oilfield and ensure the stable production of the oilfield, the exploration and practice of supplementary energy refracturing has been carried out in a small block in eastern China which is on the verge of shutdown since 2017. All of the well in this block are vertical wells. This technology breaks the injection production relationship of the original well pattern. The injection wells and production wells are fractured at the same time. Fracturing fluid is not only used for fracturing, but also for supplementing formation energy. In order to produce more new fractures and make them more complex, low viscosity slippery water is used in hydraulic fracturing. It ensures that the material cost is reduced while the amount of fracturing fluid is increased. In addition, the multi-stage proppant combination is used to support all levels of fractures, which improves the conductivity of all levels of fractures. During the implementation of refracturing, the amount of fluid used in single layer is gradually increased, from 2300 to 3500 cubic meters, the maximum amount of fracturing fluid injected in single layer is 10000 cubic meters, and the proportion of slippery water is increased from 80% to 95%. The proppant is composed of 100/140 mesh and 40/70 mesh ceramic proppant, with an average sand content of 97.7 cubic meters per layer. From the perspective of construction data, after increasing the amount of fracturing fluid used in single well, the average pump stopping pressure of the later batch of construction wells is increased by 3.5 Mpa and the construction pressure is increased by 4.5MPa. After adding temporary plugging agent, the average construction pressure increased by 1.8 MPa, and the opening characteristics of new joints were obvious. After refracturing, all test wells are produced by automatic injection production, the total number of automatic injection production days is 5.2 times of the initial fracturing, and the cumulative oil production is 1.5 times of the initial fracturing. Through practice, the original injection production relationship is broken. Increasing the amount of fracturing fluid can not only supplement the formation energy, but also improve the complexity of fractures. The multi-stage proppant slug can significantly improve the conductivity of fractures at all levels, prolong the life cycle of old wells, and provide technical support for multi thin layer reconstruction.
- Asia > China (1.00)
- North America > Canada > Alberta (0.28)
- Asia > China > Xinjiang Uyghur Autonomous Region > Tuha Field (0.99)
- Asia > China > Jilin > Yanji Basin > Jilin Field (0.99)
This presentation in English is from the 2020 SPE Russian Petroleum Technology Conference. Our archived 2020-21 event content is now available free to SPE members! This paper presentation shows the projected results of the offshore development option in the zone of deteriorated filtration-capacitance properties. The analysis was executed using modern methods of geological, hydrodynamic, and geomechanical modeling. Method of most favorable zones' isolation for carrying out multi-stage hydraulic fracturing of formation is proposed.
- Asia > Russia > Far Eastern Federal District > Sakhalin Oblast (0.40)
- Europe > Norway > Norwegian Sea (0.29)
Application of Group Fracturing Technology in the Old Area of Low Permeable Oilfield: A Case from Jilin Oilfield, Songliao Basin
Xu, Jianguo (PetroChina Jilin Oilfield Company) | Zhao, Chenxu (PetroChina Jilin Oilfield Company) | Zheng, Jiangang (PetroChina Changqing Oilfield Company) | Xuan, Gaoliang (PetroChina Jilin Oilfield Company) | Zhang, Ruquan (PetroChina Changqing Oilfield Company) | Peng, Chong (PetroChina Changqing Oilfield Company) | Liu, Hongxia (PetroChina Jilin Oilfield Company)
Abstract In recent years, the investment of new area productivity construction in Jilin oil field is high, stabilized production becomes more and more difficulty, so the strategic center of oil field transfers to the refracturing of old well, however, the comprehensive water cut and recovery of old oil field is high, and the remaining oil dispersed, increasing production and increasing efficiency by refracturing becomes more and more difficulty. In order to deal with these challenges and realize the benefits of tapping in old area, the new idea of "group fracturing" was proposed basing on the concept of volumetric fracturing, starting from the reconsideration of reservoir geology, injection production unit for the smallest study unit, and integrating multiple fracturing method, we conduct a series of technical studies and field experiment in the old area of Jilin oilfield. The group fracturing technology series mainly includes the following: (1) The high strength positioning and plugging technique for re-orientation fracturing; (2) Energy develop before fracturing and fast energy storage technique in fracturing; (3) Synchronous fracturing technique of multi wells; (4) Synchronous fracturing technique of oil and water well, re-orientation fracturing technique of water well; (5) Fracturing combining with rapid profile control and water plugging technique; (6) "Factory-oriented construction".Since 2016, the group fracturing has carried out a total of 143 wells in 14 blocks in the old area, which has achieved good results. Compared with the conventional fracturing in the same area, the economic efficiency is increased by 10.2%, the oil increase of the single well is increased by 1 times, and the effective period of the measure is raised by 50%. The practice shows that the group fracturing technique is an effective measure to exploit the benefits of the old area in the low permeability oilfield.
- Asia > China > Jilin Province (0.91)
- Asia > China > Heilongjiang Province (0.64)
- North America > United States > Texas > Reeves County (0.34)
- Asia > China > Shanxi > Ordos Basin > Changqing Field (0.99)
- Asia > China > Shaanxi > Ordos Basin > Changqing Field (0.99)
- Asia > China > Shaanxi > Chuankou Field (0.99)
- (5 more...)