Petroleum Reservoir Evaluation and Development ›› 2022, Vol. 12 ›› Issue (6): 877-885.doi: 10.13809/j.cnki.cn32-1825/te.2022.06.006

• Geothermal Development and Utilization • Previous Articles     Next Articles

Comprehensive potential analysis and development suggestions of old gas fields in Sichuan Basin in the later stage of development: A case from Sinian gas reservoir in W gas field

HU Hao(),ZHOU Hong,LONG Hui,FAN Tianyou,WU Hongbo,WU Ya,WANG Min,YANG Tongshui   

  1. Southern Sichuan Gas District of PetroChina Southwest Oil & Gas Field Company, Luzhou, Sichuan 646000, China
  • Received:2022-03-31 Online:2022-12-26 Published:2022-12-02

Abstract:

After more than 50 years of exploration and development, W gas field in Sichuan Basin is faced with large remaining geological reserves and great development potential. However, the overall water production of the gas reservoir, the subsequent effective development of the gas reservoir is restricted, resulting in the current recovery degree of only 36.6 %. In order to maximize the remaining potential of the gas reservoir and improve the final recovery of the gas reservoir, Come up with the idea of "looking for gas with water and turning waste into treasure", systematically combs the natural gas and formation water components of Sinian gas reservoir, extract helium for natural gas components, extract precious metal ions from formation water, and comprehensively utilize heat energy, so as to realize the overall effective utilization of gas reservoir. The results show that: ① The helium content of natural gas in W gas field accounts for 0.2 %~0.35 %, which is 4~7 times of the helium industrial production limit (0.05 %), and the helium reserve is about 0.8×108 m3. The scale of helium resources is very considerable. helium resource scale is very considerable, and it is one of the large helium rich gas fields in China. ② The gas field water is rich in lithium, bromine and other trace element resources, in which the lithium content is 2~3 times the industrial exploitation value and the bromine content is 2~4 times that of the industrial exploitation value. ③ The temperature of gas field water can reach 90 ℃, and it is calculated as 5 000 m3/d, the annual available heat is 3.47×1011 kJ, which can be saving 1.18×104 t of standard coal. Through the analysis of comprehensive utilization examples of Sinian gas reservoir in W gas field, combined with the effective development and utilization of new energy, it provides a new idea for the enhanced oil recovery and potential analysis of other gas fields in the later stage of development.

Key words: gas field water, comprehensive potential, helium resources, remaining reserves, comprehensive utilization, Sinian

CLC Number: 

  • TE377