Completion of Wells in High-Pressure Gas Reservoirs of the Mahe Gas Field, Junggar Basin
详细信息
- 责任者：Xu Xiaohui (Exploration & Development Research Institute of Xinjiang Oilfield Company ; PetroChina ; Karamay 830000 ; China) ; Liu Li
- 刊名：Natural Gas Industry
- 出版年：2012
- 卷期：32(2)
- 关键词：完井 ; well completion
- 页码：p.67-70
- 图表：illus., 3 tables, 5 refs.
- 分类号：2000
- issnNo：ISSN1000-0976
- isbnNo：CN51-1179/TE
摘要
The gas pay zones in the Mahe Gas Field,Junggar Basin,have moderate porosity,medium to high permeability,high single-well production rate,and high pressure gradient.The corresponding recovery technology for such gas reservoirs are still under test and development.On the basis of the characteristics of the gas zones described above,the nodal analysis method is used to calculate and analyze the IPR curves,nodes,and other sensitive parameters of gas wells there.Then in combination with the calculation of the erosion flow rate and the offloading flow rate,the proper size and configuration of the production string can be determined.This study comes to the following conclusions:(1) the ID 62 mm tubing should be used if the single-well production allocation is less than 50×104 m3/d;(2) the ID 76 mm + ID 62 mm tubing strings should be used if the individual well production is allocated to be 50×104-110×104m3/d;and(3) as for high pressure gas wells,the completion strings should be in such structure as tubing hanger + tubing + downhole safety valve + tubing + downhole pressure monitoring system + reverse-circulation killing valve + sealed plunger pipe + permanent packer + milling extension + shear ball seat + perforation gun.