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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

The stratigraphy and areal geology of Flint Ridge

Turkopp, John January 1915 (has links)
No description available.
2

Influ?ncia da areia argilosa na recupera??o de petr?leo por inje??o de vapor

Barbosa, Janaina Medeiros Dantas 12 June 2009 (has links)
Made available in DSpace on 2014-12-17T14:08:38Z (GMT). No. of bitstreams: 1 Janaina Medeiros Dantas Barbosa_DISSERT_01_35.pdf: 3284535 bytes, checksum: 7cd819680331f233db6c8299e7522b7b (MD5) Previous issue date: 2009-06-12 / Petr?leo Brasileiro SA - PETROBRAS / Continuous steam injection is one of heavy oil thermal recovery methods used in the Brazilian Northeast because of high occurrence of heavy oil reservoir. In this process, the oil into the reservoir is heated while reduces, substantially, its viscosity and improves the production. This work analyzed how the shaly sand layers influenced in the recovery. The studied models were synthetics, but the used reservoir data can be extrapolated to real situations of Potiguar Basin. The modeling was executed using the STARS - Steam Thermal and Advanced Process Reservoir Simulator - whose version was 2007.10. STARS is a tool of CMG Computer Modeling Group. The study was conducted in two stages, the first we analyzed the influence of reservoir parameters in the thermal process, so some of these were studied, including: horizontal permeability of the reservoir and the layer of shaly sand, ratio of horizontal permeability to vertical permeability, the influence of capillary pressure layer of shaly sand and as the location and dimensions of this heterogeneity can affect the productivity of oil. Among the parameters studied the horizontal permeability of the reservoir showed the most significant influence on the process followed by diversity. In the second stage three models were selected and studied some operational parameters such as injection rate, distance between wells, production time and completion intervals. Among the operating parameters studied the low rate and intermediate distances between wells showed the best recoveries / A inje??o cont?nua de vapor ? um dos m?todos t?rmicos de recupera??o de ?leos pesados utilizados no Nordeste Brasileiro, devido ? grande ocorr?ncia de reservat?rios contendo este tipo de ?leo. Este processo consiste em aquecer o ?leo existente no reservat?rio diminuindo substancialmente a sua viscosidade melhorando assim, a sua produ??o. Neste trabalho foi estudada qual a influ?ncia da presen?a de camadas de areia argilosas no reservat?rio para este tipo de recupera??o. Os modelos s?o sint?ticos, por?m com dados de reservat?rios que podem ser extrapolados para situa??es de aplica??es pr?ticas na Bacia Potiguar que apresenta reservat?rios com essa heterogeneidade. A modelagem foi implementada no simulador de recupera??o t?rmica STARS (Steam, Thermal, and Advanced Processes Reservoir Simulator) vers?o 2007.10 da CMG (Computer Modelling Group). O estudo foi realizado em duas etapas, na primeira foi analisada a influ?ncia dos par?metros de reservat?rio neste processo t?rmico, sendo assim, alguns desses foram estudados, dentre eles: permeabilidade horizontal do reservat?rio e da camada de areia argilosa, rela??o da permeabilidade horizontal com a permeabilidade vertical, influ?ncia da press?o capilar da camada de areia argilosa e como a localiza??o e as dimens?es dessa heterogeneidade podem afetar a produtividade de ?leo. Dentre os par?metros estudados a permeabilidade horizontal do reservat?rio foi o que apresentou maior influ?ncia significativa ao processo seguido da heterogeneidade. Na segunda etapa foram selecionados tr?s modelos e estudado alguns par?metros operacionais, tais como: vaz?o de inje??o, dist?ncia entre po?os, tempo de produ??o e intervalos de completa??o. Dentre os par?metros operacionais estudados as baixas vaz?es e as dist?ncias entre po?os intermedi?rias foram as que apresentaram as melhores recupera??es

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