Banca de QUALIFICAÇÃO: VERIVAN SANTOS LIMA

Uma banca de QUALIFICAÇÃO de DOUTORADO foi cadastrada pelo programa.
STUDENT : VERIVAN SANTOS LIMA
DATE: 23/12/2020
TIME: 00:09
LOCAL: Sala do Meet
TITLE:

Flow measurement in injection wells using multiple thermal profiles

KEY WORDS:

Reservoir, Injection Flow, Geothermal Profile

PAGES: 112
BIG AREA: Engenharias
AREA: Engenharia Elétrica
SUBÁREA: Eletrônica Industrial, Sistemas e Controles Eletrônicos
SPECIALTY: Automação Eletrônica de Processos Elétricos e Industriais
SUMMARY:

During the development of an oil field, the reservoirs lose their natural energy and, therefore, their initial production capacity. In the quest to increase or maintain production, several recovery techniques have been developed throughout the history of the oil industry, of which fluid injection, the focus of this work, was one of the first techniques implemented in the field and is still one of the most adopted . However, the quality of the information of the injected flow (precision and accuracy) is a crucial point for the good performance of the referred recovery method, mainly when adopting multiple injection zones, in which the simultaneous injection of fluid in several stretches occurs at the same time. along the injector well. Without security of information, the effectiveness of the logic developed by the reservoir team to improve field production is uncertain.

Among other techniques, the flow calculation using thermal profiles has been researched and applied in the industry since the middle of the 20th century. In its development over the years, considering the impossibility of physical access to all points of the three-dimensional environment of an oil reservoir , the following simplifications were adopted in the literature: a) adoption of the geothermal profile in the flow inference; b) knowledge, accuracy and precision of the geothermal profile; c) knowledge, accuracy and precision of the initial thermal conditions of the reservoir, assumed to be equal to the geothermal profile; d) knowledge, homogeneity and invariance of the thermal properties of the reservoir; e) reservoir with infinite extension, valid simplification in view of the low speed of propagation of the thermal disturbance (approximately 15 meters in the first year of injection). As a product of the resulting model, the solutions obtained are permanently transitory, demands days of continuous operation for a representative reading and includes the inaccuracies resulting from the lack of knowledge of the initial conditions, the physical properties of the reservoir and the geothermal profile itself. In addition, the analytical solutions of the differential equations, obtained by adding more simplifications to the model, are not amenable to use in practice, as they have always depended on unavailable information, listed previously.

As an answer, this qualification proposal proposes the use of other thermal profiles, different from the geothermal profile, for the inference of the injected flow, eliminating the uncertainties related to the reservoir and improving the accuracy and the time required for the inferred flow to be representative.

BANKING MEMBERS:
Presidente - 1149567 - ANDRES ORTIZ SALAZAR
Interno - 350693 - ANDRÉ LAURINDO MAITELLI
Externa ao Programa - 6350734 - CARLA WILZA SOUZA DE PAULA MAITELLI
Externo à Instituição - DIEGO ANTONIO DE MOURA FONSECA - UFRN