Guo B.,No. 7 Drilling Road |
Wang X.,No. 7 Drilling Road |
Jiang L.,No. 7 Drilling Road |
Yan B.,No. 7 Drilling Road
Drilling Fluid and Completion Fluid | Year: 2015
A testing device was developed for the measurement of the rheology of aphron drilling fluids. This device has the capacity of simulating downhole temperatures to 100℃ and downhole pressure to 20 MPa. A procedure for the testing of the HTHP rheology of aphron drilling fluids is established. A newly prepared aphron drilling fluid is tested using this device, showing good shear thinning property. Foam quality greatly affects the rheology of the aphron drilling fluid. Pressures, on the other hand, do not obviously affect the rheology of the aphron drilling fluid because of its high pressure resistance. Temperatures greatly affect the viscosity of the liquid phase, thus plays great role in determining the rheology of the aphron drilling fluid. Types of gases have little effect on the rheology of the aphron drilling fluid. In field application, the rheology of the aphron fluid can be adjusted by changing the amount of foamers and agitation speed. ©, 2014, North China Petroleum Administration Drilling Technology Research Institute. All right reserved.