A Study of Stress Sensitivity on the Effective Development of Low-permeability Gas Reservoirs in the Sulige Gas Field

Abstract

Stress sensitivity plays an important role in the development of a tight low-permeability gas reservoir. With the constant low-permeability reservoir exploitation, formation pressure drop, rock net effective coverage pressure increase, the rock pore is resulted in deformation and the seepage flow of fluid in a low-permeability reservoir no longer followed Darcy flow law. With the further exploitation of reservoirs, reservoir stress sensitivity is enhanced, so evaluation on the stress sensitivity on reservoir development was a burning question. The authors present results of those experiments that simulated the permeability changes via the net confining pressure in the lab and give the influencing factors of stress sensitivity.

Keywords:

• crustal stress
• low-permeability gas reservoir
• permeability
• stress sensitivity
• Sulige gas field