Application of reservoir characterization and advanced technology to improve recovery and economics in a lower quality shallow shelf carbonate reservoir. Fourth quarterly technical progress report, (October 1, 1994--December 31, 1994)

摘要

The focus of the project is to show that the use of advanced technology can improve the economics of CO(sub 2) projects in low permeability reservoirs. The approach involves the use of tomography and pore throat measurements to enhance reservoir characterization. Cyclic CO(sub 2) stimulations and frac treatments will be used to increase and facilitate oil recovery to improve project economics. Reservoir description and simulation will be used along with cyclic CO(sub 2) stimulation and frac treatments to arrive at an optimum operating plan to be instituted during the second budget period. The official start up of the project was 8/3/94, so 12/31/94 represents the end of the second quarter. However, work in the area of cyclic CO(sub 2) stimulation and reservoir characterization had taken place prior to the official start date under pre-award approval. Object to be accomplished during the second quarter included: detailed petrophysical description of cores from the observation wells; integrate the petrophysical data into a geologic model; acquire the tomography surveys; initiate processing of tomographic data; complete enhanced interpretation of 3-D seismic volume in the DOE demonstration area; develop relationship between seismic attributes and well log parameters; and complete cyclic CO(sub 2) stimulation treatments. A majority of these objectives were accomplished during the fourth quarter of 1994. There are still six tomography surveys to be conducted during January. Processing of the tomographic data has gotten off to a slow start, but will accelerate with an upgrading computing power. The initial CO(sub 2) injection into one of the cyclic wells has not been completed.