A comprehensive compositional simulator for imbibition carbonated waterflood in a naturally fractured reservoirs /
A comprehensive three-dimensional, three-phase, isothermal, compositional simulator (COMPDU 2.0) is developed to model imbibition carbonated waterflooding, C02-WAG process, and condensate reservoir performance in naturally fractured reservoirs. In the imbibition carbonated waterflooding, C02 is dis...
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| Format: | Thesis Book |
| Language: | English |
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[Place of publication not identified] :
[publisher not identified] ;
1996.
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| Online Access: | http://proxy.library.tamu.edu/login?url=http://proquest.umi.com/pqdweb?did=743273521&sid=1&Fmt=2&clientId=2945&RQT=309&VName=PQD |
| Summary: | A comprehensive three-dimensional, three-phase, isothermal, compositional simulator (COMPDU 2.0) is developed to model imbibition carbonated waterflooding, C02-WAG process, and condensate reservoir performance in naturally fractured reservoirs. In the imbibition carbonated waterflooding, C02 is dissolved in the injection water. The amount Of C02 partitioning into the hydrocarbon phases in the reservoir is calculated using Peng-Robinson's equation of state (PR-EOS) and Henry's law. PREOS is used for the equilibrium calculation of the hydrocarbon phases and Henry's law is used for computing fugacities of the components in the aqueous phase. The transient time required to reach a thermodynamic equilibrium is controlled by the partitioning coefficient. This simulator also considers the effect Of C02 solubility on the density and viscosity of the aqueous phase and hydrocarbon phases. The numerical solution scheme is implicit in pressure and explicit on saturation and composition (IWESC). A pre-elimination scheme is used to reduce the coefficient matrix order of the dual-porosity pressure equations from 2N to N. The Courant-Friedrichs-Lewy (CFL) number and the maximum change in local pressure, composition, and saturation are used to select the timestep size. This simulator is validated by running the cases in the SPE comparative solution projects #3 and #5 for single- porosity option. The tank models for gas condensate and volatile oil reservoirs, and a two-dimensional, fully compositional volatile oil case are used for verifying the accuracy and capability of COMPDU 2.0 in dual-porosity option. Results indicate that COMPDU 2.0 works very well. COMPDU 2.0 is used to simulate laboratory imbibition carbonated waterflood processes. Results indicate that COMPDU 2.0 significantly improves the simulation results and performance over that of COMABS. With the improvements in C02 partitioning schemes and automatic timestep size selection, COMPDU 2.0 is capable of simulating laboratory-scale imbibition carbonated waterflooding. |
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| Item Description: | Vita. "Major Subject: Petroleum Engineering". |
| Physical Description: | xv, 167 leaves : illustrations ; 28 cm. Issued also on microfiche from University Microfilms Inc. |
| Bibliography: | Includes bibliographical references. |