1_Introduccion cor.pdf

7/23/2019 1_Introduccion cor.pdf

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ANALISIS DE REGISTROS ELECTRICOSEVALUACION DE FORMACIONES

(a hueco abierto)


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HISTORICAL SLBHISTORICAL SLB

FIRST ElectricLOG

Pechelbronn,France 1927


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The first logging truck


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(Adquisicin y) PROCESAMIENTO DE D

RESERVORIO

OBJETIVO: Evaluacin de Formaciones / Ya

PERFILES

Herramientas

Principios BASICOS de funcionamiento / medi Aplicaciones (cualitativas, cuantitativas)

Ecuaciones (parmetros)

CARACTERISTICAS PETROFISICAS

CORONAS

ENSAYOS CONTROL GEOLOGICO (Mud Logging)


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EVALUACION DE FORMACIONES / YA

SP CORES Descripcin (X ray, Th. Sec)CCA (Phi, K, GD, Sw)

GR (NGT) SCAL (Kr, Swi, Shcr, , OB)

IND / RES TEST RFT / MDT (Pres, fluidos, Mob)DST (fluidos, K*h)

RHOB - NPHIMUD LOG Cutting (litologa, fluidos)

DT Co GAS (cromatografa)Sh, St ROP

IMGENESNT (CMR, C/O)

RAW DATA NON-LOG DATA

ECUACIONES(parmetros)

TECNOLOGIA a mano bacos calculadoras com

INTERPRETE ! ! !

cor

re

lac

i

n

porosidad


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04/12/2002 Principios Bsicos. D. Astesiano

Preparacin de da

1/3 o 1/2 del tiempo total de anlisis. Subestimado

Missing data Pseudocurvas

Depth matching Pozos viejos (no combos)

Correcciones ambientales Borehole (caliper, presin y temperatura de F

salinidad agua de Fm)

GR, Deep Res, Ne

Normalizacin Logs viejos (Batch processin

histogramas.

Post 1980 no es importante

Cuidado con la heterogenei


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Preparacin de da

Coronas Depth shift. GR, Phi

Rec alta Fcil

Rec baja Problemtica y

Zonacin preliminar Geolgica:Formacion

secuencias

Quicklook : Zonas no -

anomalas ...)


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Modelos de interpre

Determinstico Secuencial (step

Quicklook orden de magnitud, weviejos, sin calibracin con coronas u otr

Correccin de ambiente, Vsh, , Sw, K

Multimineral Matricial Relacin ecuaciones / incgnitas.


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CoreConventional analysis

Special analysis

Photos

Petrographic studies

Mapping

Petrophysics

Fundamental objectivesSw

K

N:G

LogsConventional

Special purpos

RFTs

Volumetr

(static)

Dynamic dataWell tests

Production data

RFTs

Geology

Simulatio

(dynamic

Development Decisions

And

Cost Effective Exploitati

The central role of Petrophysics is to INTEGRATE ALL DATA relevant to o. Sw and k

Intergrated Petrophysics is:

Collating and analyzing all pertinet data

Empirical: predicting Unknowns from Knowns by correlation

Part rock part fluid: midway between the rocks and fluids

Departments (Eploration & Production)

Never complete: lack of factS, understanding or time

More difficult with more data, but betterHard to sell: less data.... Less argument...less work


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Major Petrophysical Difficulties

Low porosities (


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Types and Scales of Res

GIGA MEGA

INTERPRETATION

GEOLOGICAL

ENGINEERING

SEISMIC

PRODUCTION

PRESSURE TRANSIEN

GOAL: Early Integrati


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Microscropy

Plug Analysis

Full Diameter

Well Logs

Depth of Investigation

Vertica

lResolution

SCALEINCREASE

Petrophysical technologies used in rese


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Introduccin a la caracterizacin de reservorios de hidrocar

Necesarias para su determinacin que puede ser extensible

Depositaciones. La tabla 4 presenta un esquema de estas re

De costos comparativo.

Relacin entre informacin, calidad del dato y costo compa


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Ojo humano sin ayuda mirando una corona feteada de 4 pulgadas a una distancia de 60 cm# Detector de 3 pulgadas de dimetro aplicado a una corona de 4 pulgadas

n/a no aplicable

Caractersticas de distintas mediciones (modific


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CONTROL PANELS

COMPUTER

RECORDERCABLE WINCH

DEPTH

MEASUREMENT

WIRELINE

WIRELINE


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Schlumberger depth

Loggers depth is more precise

depth. Drillers depth does not

stretch.

Accuracy: +/- 5ft in 10,000

Repeatability: +/- 2ft in 10,000


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SLB TodaySLB Today

Contemporary LoggingSetup


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Schlum

Schlum

Schlu

Schlu

MAXIS

Modular MAXIS

SLB TodaySLB Today


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InterACT

A MAXIS service allowing real time transmission of logging da

from the wellsite to be viewed at the customers office PC



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Historical PerspectiveHistorical Perspective

1912 - Electrical Prospecting from surface

1927 - First Electrical Coring in

Pechelbronn

1929 - Commercial Logging Ven., US, Russia

1933 - Electrical Logging

30s - Core Sample Takers

40s - SP, Improved Resistivity, Dipmeters

50s - Microlog, Laterolog, Induction, Sonic

Fluid Samplers

60s - Neutron Porosity,Bulk Density

70s - Tool Combinations, Data recording

80s - CyberService Unit. Digital Telemetry,

Imaging tools, LWD,TLC 90s - Maxis 500, PEx, MDT, CMR,

DSI, FMI, Minimum Configuration

Maxis, real time data transmission

00s - the skys the limit


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Evaluation ServicesEvaluation Services

Reservoir evaluation: , k, Vsh, SwGeological evaluation

Geophysical evaluation

ElectricalNuclear

Acoustic

Magnetic

Resonance

ImagingSeismic

Formation

pressure &

samples

Fluid saturation SwPorosity

Lithology

Shaliness Vsh,

Porosity Mechanical properties

Porosity

Permeability k

GeologicalGeophysical

Permeability k

Physical samples


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CALI_1

IN6 16

GR_1

GAPI0 200

SP_2

MV-80 20

XX75

XX00

XX25

XX50

XX55.0

DEPTHMETRES

SFLU_1

OHMM0.2 200

ILM_1

OHMM0.2 200

ILD_1

OHMM0.2 200

NPHI_2

V/V0.45 -0.15

RHOB_1

G/C31.95 2.95

DT_1

US/F140


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Pf

Pm

Pm Pf INVASION

Pm >> Pf Fractura (admision)


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INVASION PROCESS

Sand

Shale

Sand

Sand

Shale


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Before Invasio


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During Invasio


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After Invasion


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MudHole

External Filter Cake

Bridging Zone

Zone Invaded bythe Mud Spurt

UncontaminatedFormation

B

orehole

Flow

PORE BRIDGING (MODIFIED AFTER DARLEY, 1975)

A-DOWNHOLE VIEW OF PARTICLE INVASION DEMONSTRATEHOW INITIAL FLUSHING CAN CLOG PORE THROATS


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Basic Ma terial

Symbols Used in Log Interpretation

Schlumberger

Gen-3

dhHole

diameter

didj

h

rj

(Invasion diameters)

Adjacent bed

Zone oftransition

orannulus

Flushed

zone

Adjacent bed

(Bedthickness)

Mud

hmc

dh

Rm

Rs

Rs

Resistivity of the zone

Resistivity of the water in the zone

Water saturation in the zone

Rmc

Mudcake

Rmf

Sxo

Rxo

Rw

Sw

Rt

Uninvadedzone

Schlumberger

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