SCAL ANALYSIS OBJETIVES Special core analysis (SCAL) is one of the main sources of data available to guide the reservoir engineer in assessing the economic.

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Transcripción de la presentación:

SCAL ANALYSIS OBJETIVES Special core analysis (SCAL) is one of the main sources of data available to guide the reservoir engineer in assessing the economic potential of a hydrocarbon accumulation. They allow us to feed and optimize the petrophysical model that will allow us to obtain the highest percentage of the field through an adequate administration of the production system ADVANTAGES Laboratory data are used to support field measurements which can be subject to certain limitations, e.g.: Fluid saturations may be uncertain where actual formation brine composition and resistivity are not available. Permeability derived from well test data may be reduced by localised formation damage (skin effects) and increased by fractures. TYPES ANALYSIS Capillary pressure measurements: Porous plate, centrifuge and mercury injection methods. Electrical measurements; resistivity index and saturation exponent, formation factor at room and overburden pressure, and cementation exponent. Relative Permeability: Two and three phases, stable and unstable states. w-o, g-w and g-o Special analysis: Critical flow velocity, fluid sensitivity, permeability returns. DISADVANTAGES Limitations on the availability of appropriate rock samples from a specific field Availability of hydrocarbon-type fluid samples Unsuitable hydrocarbon samples (Value ° APi very close to water) very extensive sample analysis times for some types of tests analysis costs

RCAL Porosidad Corazonamiento Corazones no preservados Limpieza y secado Permeabilidad al gas Densidad de Grano Dean Stark saturación de agua Permeabilidad Klinkenberg Retorta y saturación de aceite Routine Core Analysis Laboratories 2. GENERALIDADES Special Core Analysis Laboratories Mediciones a P Overburden Corazonamient o Corazones preservados Limpieza Especial y secado Core seco Core saturado Porosidad y K gas Compresibilidad K salmuera Propiedades eléctricas Presión Capilar Aire- Salmuera Aire- Mercurio Aceite-Salmuera Centrifuga o Plato poroso Propiedades eléctricas Factor de Formación, m,, a & afectos del Shale Indice de Resistividad, n & efectos del Shale Mojabilidad USBM Amott Capacidad de Flujo Permeabilidad Absoluta Permeabilidad Relativa Gas-aceite Agua- aceite Gas - salmuera Estado estable o no estable. Modos de Drenaje o condiciones d e Laboratorio o de yacimiento Salmuera o aceite SCAL Fuente: Laboratorio Petrofísica Básica y Especiales - Ecopetrol

FLUJO GRAMA OPERACIONAL PROPIEDADES ELÉCTRICAS Determinación del Factor de formación Determinación del exponente cementación “m” Determinación del Índice de Resistividad “Ir” Determinación del Exponente de saturación “n” SATURACIÓN FLUIDOS POROSIDAD Y PERMEABILIDAD DENSIDAD DE GRANOS COMPRESIBILIDAD CORING COREGAMA SELECCIÓN PLUGS Y CORTE DE PLUGS SLABBING CT SCAN SEDIMENTOLOGIA FOTOGRAFÍA DIGITAL PRELIMINARES PARA RESTAURACION DE MOJABILIDAD PREFERENCIAL Preparación de fluidos Acuosos Filtración y deshidratación de fluidos base hidrocarburo Preparación y Saturación de muestras RESTAURACIÓN DE MOJABILIDAD PREFERENCIAL EVALUACION VELOCIDAD CRITICA DE FLUJO PERMEABILIDADES RELATIVAS Agua–Aceite, Agua-Gas y Gas-Aceite Estado Estable y No Estable Medición de permeabilidad efectiva al aceite Waterflooding Medición de permeabilidad efectiva al agua Matching Software Sendra MOJABILIDAD PREFERENCIAL Amott-Harvey USBM PRESION CAPILAR Plato poroso Centrifuga Inyección de Mercurio ANÁLISIS WINDLAN Fuente: Laboratorio Petrofísica Básica y Especiales - Ecopetrol

Fuente: Formation Evaluation -Paul Grover TIPOS DE PRUEBAS SPECIAL CORE ANALYSIS