A natural method of evaluating the permeability of the water-collector skeleter and optimization of the debit of fountain wells

• Дата: 2017
• Автори: Ludanov, K., Oliinichenko, V.
• Формат: Стаття
• Мова: Російська
• Опубліковано: Institute of Renewable Energy National Academy of Sciences of Ukraine 2017
• Теми: gushing well; geothermal water; porous skeleton; water reservoir; hydraulic permeability; Dupuis equation; optimal production rate
• Онлайн доступ: https://ve.org.ua/index.php/journal/article/view/67
• Назва журналу: Vidnovluvana energetika

The analysis of the current state of the analytical description of the filtration in the near-well zone of the porous skeleton of an imperfectly opened aquifer has been carried out and it is established that the logarithmic nature of the Dupuy formula in the form (1) for the dependence of the inflow of water from the formation into a single well obtained in solving the "flat filtration problem" Conduct a simple and accurate assessment of the hydraulic parameters of the aquifer in full-scale conditions.When using the exact non-stationary solution of Teys to determine the permeability of the formation, data on the piezoelectric conductivity of the skeleton are required, the determination of which is also a very difficult problem.In the paper, based on the analysis of the problem by the method of heat-hydraulic analogy, a stationary solution of the problem of three-dimensional filtration of liquid from the aquifer into the casing filter for the case L / R ≥ 20 has been found.This made it possible to quickly and accurately estimate the permeability of the skeleton of the hydraulic resistance of thewell- Which is necessary, among other things, to optimize the operating mode of the flowing well.The values of the hydraulic permeability of the skeleton of the aquifer at a depth of 1.1 km and 2.3 km have been estimated and it has been established that k depends inversely on the cube of the formation depth.For the first time, the flow rate of the flowing wells of geothermal water has been optimized by the criterion of useful workof the fountain. The expression for the optimal production rate is established. It was found that the optimal inflow into the well(production rate) is directly proportional to the ratio of the maximum pressure at the wellhead and inversely proportional tothe hydraulic resistance of the porous skeleton of the formation in the near-well zone of the aquifer.