URI: http://hdl.handle.net/11122/5845

Date: 2007-12

Type: Thesisms

Table of Contents: 1. Introduction -- 1.1. Purpose of oil-well cementing -- 1.2. Permafrost cementing -- 1.3. Problems associated with convential cements -- 1.4. Ideal permafrost cement properties -- 1.5. Objective of the research -- 2. Literature review -- 2.1. Introduction -- 2.2. Cementing methodology -- 2.2.1. Primary cementing -- 2.2.2. Secondary or remedial cementing -- 2.3. Available permafrost cements -- 2.3.1. API class A, C, or G cement -- 2.3.2. High aluminate content cement -- 2.3.3. Blend of gypsum and Portland cement -- 2.4. Background information of Portland cement manufacturing -- 2.4.1. Clinker formation -- 2.5. Freeze temperature depressants -- 2.6. Cement temperature stability -- 2.7. Novel chemically bonded phosphate ceramic borehole sealant (Ceramicrete) -- 3. Determination of thawed permafrost zone around the well bore -- 3.1. Introduction -- 3.2. Numerical method of determination of thawed permafrost zone around the wellbore -- 3.2.1. Physical system representing permfrost thawing around the wellbore -- 3.2.2. Assumptions -- 3.2.3. Mathematical formulation of physical system -- 3.2.4. Initial and boundary conditions -- 3.2.5. Results and discussion -- 3.3. Determination of thawed permafrost zone around the wellbore using ABAQUS software -- 3.3.1. Material properties used in ABAQUS software -- 3.3.2. Well dimensions of typical well at ANS -- 3.3.3. Thawing of the permafrost zone around the well bore after 3.5 hrs. at 50 degree C -- 3.3.4. Comparison between thawed zones around the wellbore after 3.5 hrs. at 50 degree C and at 32 degree C -- 3.3.5. Freeze back of thawed zone at -1 degree C -- 3.3.6. Continuous thawing of permafrost at 10 degree C for 1 year -- 3.3.7. Results and discussion -- 4. Experimental procedure and testing methodology -- 4.1. Introduction -- 4.2. Formulation of Ceramicrete -- 4.3. Compatibility test -- 4.3.1. Introduction -- 4.3.2. Experimental procedure -- 4.3.3. Results and discussion -- 4.4. Thickening time testing -- 4.4.1. Introduction -- 4.4.2. Results and discussion -- 4.5. Density measurement -- 4.5.1. Introduction -- 4.5.2. Results and discussion -- 4.6. Compressive strength testing -- 4.6.1. Compressive strength measurements using Ultrasonic cement analyzer -- 4.6.2. Results and discussion -- 4.6.3. Compressive strength measurement by curing method -- 4.6.4. Results and discussion -- 4.7. Fluid loss testing -- 4.7.1. Introduction -- 4.7.2. Experimental procedure -- 4.7.3. Results and discussion -- 4.8. Rheology measurements -- 4.8.1. Introduction -- 4.8.2. Experimental procedure 4.8.3. Results and discussion -- 4.9. Expansion test of Ceramicrete slurry at 40 degree F -- 4.9.1. Introduction -- 4.9.2. Experimental procedure -- 4.9.3. Results and discussion -- 5. Determination of optimum amount of MgO in Ceramicrete binder -- 5.1. Introduction -- 5.2. Ceramicrete formulation preparation -- 5.3. Expansion test at 32 degrees F -- 5.3.1. Introduction -- 5.3.2. Results and discussion -- 5.4. Fluid loss testing of Ceramicrete formulations at room temperature and 1000 psi differential pressure -- 5.4.1. Introduction -- 5.4.2. Results and discussion -- 5.5. Uniaxial compressive strength testing -- 5.5.1. Introduction -- 5.5.2. Experimental procedure -- 5.5.3. Results and discussion -- 6. Conclusions and recommendations -- 6.1. Conclusion -- Recommendations -- References.