The rock mechanics problems existing in wellbore stability,sand production prediction,land subsidence and fracture extension have been studied for about 20 years in China.

• 国外近20年来一直致力于研究石油工程问题，如：井筒稳定性、产砂预测、地面沉降及水力裂缝扩展机理等所涉及到的岩石力学问题。