Application analysis and stress sensitivity experiment for a gas reservoir in Daqing Oil Field

By measuring the change of confining pressure penetration on sandstone samples of a gas reservoir in Daqing Oil Field, it has been proven that stress sensitivity existed in this gas reservoirs. The measuring results also show that the stress sensitivity levels of mafic is from weak to medium weak due to the better glutinosity and the greater rock hardness. However, some sandstone samples generally do not have stress sensitivity. The impact of stress sensitivity should be thoroughly considered during the development of natural gas, because the existence of cracks which often result in stronger stress sensitivity.