This submission includes the University of Alaska Fairbanks Monthly Research Performance Progress Reports. The goal of this project is to develop an improved cement for geothermal wells.
This submission includes the University of Alaska Fairbanks Monthly Research Performance Progress Reports. The goal of this project is to develop an improved cement for geothermal wells.
Evaluation of Deep Wellbore Integrity in the Zama Field
Evaluation of Zama Field Wellbore Integrity Part I is the evaluation of wellbore integrity Part II is the evaluation of leakage potential by well
The data files below summarize the results from various experiments testing properties of high-temperature self-healing inorganic cement composites. These properties include cement-carbon steel bond strength, Young's modulus recovery, matrix recovery strength, and compressive strength and Yonug's modulus for cement composites modified with Pozzolanic Clay additives.
A presentation with notes showing an overview of the last 6 months of the project on high-temperature self-healing inorganic cement composites. General approach, test methods and results for the self-healing cement composites are presented. Data include strength recoveries for 9 cement composites in three curing environments (water, alkali carbonate, brine) at 300 degC, bond strength measurements for cement/carbon steel samples, thermal shock tests, performance of healing aids. The presentation was shown during the joint SPE/GRC workshop on March 22 in San Diego, California
Polymer-cement experiments were conducted in order to assess the chemical and thermal properties of various polymer-cement composites. This file set includes the following polymer-cement analyses: Polymer-Cement Composite Synthesis Polymer-Cement Interactions by Atomistic Simulations Polymer-Cements Compressive Strength & Fracture Toughness Polymer-Cements Fourier Transform Infrared Spectroscopy (FTIR) Analysis Polymer-Cements Resistance to Thermal Shock-CO2 and H2SO4 Attack Polymer-Cements Rheology Analysis Polymer-Cements Self-Repairing Permeability Analysis Polymer-Cements Scanning Electron Microscopy with Energy Dispersive X-Ray Spectroscopy (SEM-EDX) Compositional Analysis Polymer-Cements Thermogravimetric Analysis (TGA) and Total Organic and Inorganic Carbon Analysis (TOC and TIC) Polymer-Cements X-Ray Diffraction (XRD) Analysis
This test was conducted at the Chevron Cymric oilfield in the California central valley near Bakersfield. A reflected seismic signal was observed in all three components (x, y, z) of the 3-component Episensor geophone, as well as all phones on the single component array. The arrival time of the reflected seismic signal matches calculations based on a reasonable velocity model (~650 m/s). The seismic data has three channels that are from the 3-C Broadband Episensor, then from 4th -- 12th channels has no data. Channel 13 -- 25 are surface single change vertical geophones. The source of this seismic survey is weight drop. More info could be found from the data header and the attached PPT file.
The objective of this field test is to validate several technologies for non-invasive well integrity assessment using existing wells with a known completion. The tests were made at the Cymric oil field, which is a steam flood operation. The wells therefore undergo similar downhole conditions as geothermal wells. The Cymric field is mainly a cyclic steam operation where wells are 1000-15-00 ft in depth and the reservoir occupies the bottom 400ft. The maximum temperatures can exceed 500 degrees F and the well spacing is very close, often less than 50m. The field plan consisted of applying the Time Domain Reflectometry (TDR) method to the wells. The input voltages were set as 70 V shows the TDR responses at frequencies of 450 kHz, 2500 kHz, and 4500 kHz. There is a summary report will full information about the field tests.