Research and application on wellbore integrity technology for Integration of Oil Recovery, Well Completion and Drilling

Huabei oilfield has entered the middle and late periods of the development, and a series of problems such as casing damage, casing deformation,restricted measures and eccentric wear of staff and tube are gradually exposed in the development process([1,2]), which affect the development benefit of oilfield, and the wellbore integrity is closely related to the development benefit. Therefore, in order to ensure the qualified wellbore conditions, huabei oilfield put forward the design concept of "Integration of Oil Recovery, Well Completion and Drilling", the engineering design system of multi-professional coordinated and unified "Integration of Oil Recovery, Well Completion and Drilling" are constructed, the optimization design of drilling trajectory, casing and frac fluid system was carried out. The application shows that the design prolonged the life cycle of oilwell effectively, which of great significance for single well productivity improvement and benefit development.