Low-permeability reservoirs in Qiaokou gas field

Dongpu sag

features in large reserves and complica-ted geological conditions.By dint of SEM

X-ray diffraction

sensitivity testing

and other means

the author sums up factors of reservoir damages

specifies that the reservoirs in the study area mainly suffer from stress sensitivity

velocity sensitivity

water sensitivity

salt sensitivity

alkali sensitivity and acid sensitivity.Based on research and evaluation of all kinds of sensitivities

this paper presents approaches and solutions for maintaining the original reservoir permeability or enhancing reservoir permeability

and proposes practical measures for protecting low-permeability reservoirs and improving production performance.