Jurnal maqolasiOchiq kirish
Yangbajing geotermal konidagi darzli granit kollektoridan geotermal energiya olishda gorizontal quduqlar yordamida bosimni pasaytirish usuli
Horizontal well-assisted depressurization method for geothermal exploitation from fractured granite reservoir at Yangbajing geothermal field
https://doi.org/10.1038/s41598-025-34604-0
Asosiy jihatlar
- Dastlabki 12,5 yil davomida qazib olinayotgan flyuid harorati 230 °C da, bug‘ to‘yinganligi esa 0,28 da barqaror saqlanadi.
- 20,6 yillik ishlash muddati davomida: elektr quvvati 32,28–23,12 MVt, nasoslar sarflaydigan quvvat esa 1,14–1,83 MVt.
- 20,6 yil ichida tizimning o‘z ehtiyojlari chegirilgandan keyin taxminan 4 820 GVt·soat sof elektr energiyasi.
- Elektr energiyasining keltirilgan qiymati hisob-kitoblarga ko‘ra har kVt·soat uchun 0,0137 AQSh dollari; taqqoslash uchun, 2022-yilda Tibetda sanoat iste’molchilari uchun elektr energiyasi narxi har kVt·soat uchun 0,09 AQSh dollari bo‘lgan.
- Hisob-kitoblarga ko‘ra, issiqxona gazlari chiqindilari 1,63–5,63 mln tonnaga qisqaradi.
Annotatsiya
Utilizing the geological information obtained from the ZK4001 borehole of Yangbajing geothermal field, a horizontal well system with depressurization method was proposed to achieve heat production from fractured granite reservoir. Numerical simulations under the assumed geological and operational conditions were conducted to investigate the geothermal exploitation performance, the power generation potential and its dependent factors. Assessment indicates that within a reservoir spanning depths of 950–1350 m and maintaining an average temperature of 248 °C, at a production pressure of 2.5 MPa, the production temperature remains stable at 230 °C with a steam saturation of 0.28 for 12.5 years, subsequently experiencing a decline. Over a lifespan of 20.6 years, the fundamental horizontal well system achieves an electric power of 32.28–23.12 MW, exhibits a reservoir impedance of 0.072–0.096 MPa/(kg/s), requires a pump power of 1.14–1.83 MW, and demonstrates an energy efficiency of 28.87–12.65, suggesting favorable geothermal exploitation performance under the modeled conditions. The estimated reduction in greenhouse gas emissions amounts to 1.63–5.63 Mt. Sensitivity analysis indicates that, for the geothermal exploitation by the depressurization method, the production pressure has a significant impact on geothermal exploitation performance. Enhancing the permeability of the reservoir can effectively decrease flow impedance, minimize internal energy consumption, and result in improved energy efficiency. Moreover, adjusting the injection flow rate within a specific range can enhance the system’s energy efficiency.
Mualliflar annotatsiyasi CC BY-NC-ND 4.0 litsenziyasi asosida keltirilgan. Annotatsiya ingliz tilida berilgan.
Kalit so‘zlar
- Yangbajing geotermal koni
- Gorizontal quduq
- Bosimni pasaytirish usuli
- Darzli granit kollektori
- Geotermal resurslarni o‘zlashtirish
Sodda qilib aytganda
Lxasadan taxminan 90 km shimoli-g‘arbda joylashgan Yangbajing — Xitoydagi birinchi yuqori haroratli gidrotermal geotermal kon. Mualliflar ZK4001 qudug‘i ma’lumotlari asosida 950–1 350 m chuqurlikda yotgan, o‘rtacha harorati 248 °C bo‘lgan darzli granit kollektorini modellashtirgan.
Sovuq suv kollektorning pastki qismidagi bitta gorizontal quduq orqali haydaladi, yuqori qismidagi ikkita gorizontal quduqdan esa issiq flyuid olinadi. Ishlatish quduqlarida past bosim (2,5 MPa) ushlab turiladi, shu sababli kollektordan bug‘ va suv aralashmasi chiqadi — bu «bosimni pasaytirish usuli» deb ataladi. Flyuid bug‘ni ikki bosqichda ajratuvchi (double-flash) elektr stansiyasiga beriladi.
Model faqat issiqlik va flyuid oqimini qamrab oladi: tog‘ jinslari deformatsiyasi, darzliklardagi o‘zgarishlar va kimyoviy jarayonlar hisobga olinmagan. Mualliflar natijalar faqat modellashtirilgan sharoitlarga taalluqli ekanini ta’kidlaydi.
Rasmlar (3)
Iqtibos namunasi
Yuchao Zeng, Lixing Ding, Nengyou Wu, Xiangyang Shen, Yan Sun, Elbek Ochilov, Lihua Huang, Qixiu Li and Haizhen Zhai (2026). Horizontal well-assisted depressurization method for geothermal exploitation from fractured granite reservoir at Yangbajing geothermal field. Scientific Reports, 16, 4558. https://doi.org/10.1038/s41598-025-34604-0
Saytimiz yangiliklarida
O‘zbekistonlik tadqiqotchi hammuallif bo‘lgan ishda Tibetdagi Yangbajing konidan 32 MVt geotermal elektr quvvati olish modellashtirildi2026-yil 3-fevral