The Reasons And Countermeasures Of Casing Damage Of The NO.1 Southwest Area Of Sazhong Development Area In Daqing Oilfield

Casing of wells in the West of South NO.1 area in Sazhong Development of Daqing Oilfield is damaged, have a significant adverse impact on crude oil production. Currently the area of casing damage causes and prevention measures are still to be studied. Based on a variety of geological data, development, earthquake, production, analysis of the type and distribution of casing failure, casing damage caused by reasons for proposing the western region of the south and the main geological factors, the development of the two major aspects. Geological factors include tender two parts rock bottom fragile regional faults, stratigraphic occurrence changes, development was mainly caused by the high pressure water injection into the formation area of water intrusion, development too fast or development steps convergence does not close the pore pressure caused by regional and regional invasion water interaction. In response to these factors, the proposed standard layers cut into the water source, the standard layer fill holes relief, take a variety of methods to monitor the stability of logging, pressure and other measures to adjust the plane, and oil field applications to achieve better results.