Provision Plus Lwd

proVISION PlusMagnetic resonance-while-drilling service

Unlocking the full potential of complex reservoirs

1

proVISION PlusBy providing lithology-independent porosity, pore-size distribution, continuous permeability, and direct hydrocarbon detection, the proVISION Plus* service delivers a step change in real-time producibility assessment for complex reservoirs.

Applications ■ Continuous, real-time, lithology-independent

porosity without chemical sources ■ Continuous, real-time permeability evaluation ■ Resistivity-independent pay identification ■ Thin-bed characterization ■ Carbonate facies characterization ■ Irreducible water saturation ■ Gas-bearing reservoir evaluation ■ Heavy oil and tar identification

Benefits ■ Optimizes well placement to maximize

well productivity ■ Enhances perforation and stimulation design ■ Provides pore size distribution to assess

reservoir storage and flow capacity ■ Saves rig time through early formation

evaluation ■ Prevents plug-and-abandon and sidetrack

decisions by avoiding water-cut situations

Features ■ Real-time, continuous measurement

of T2 distribution ■ Calculation from T2 distribution of continuous

permeability, lithology-independent porosity, producible and irreducible fluid volumes, and pore size distribution

■ Turbine power to eliminate trips to replace batteries

■ Single-sleeve stabilizer that minimizes motion without affecting tendency

■ Ability to be placed anywhere in BHA

2

0.5 ms 5,000

0.5 ms 5,000 0.3 g/cm3 0

0.6 ft3/ft3 0

0.6 ft3/ft3 0

Bound Fluid

Free Fluid

T2 Logarithmic Mean

T2 Cutoff

Magnetic ResonancePorosity

> 300 ms

100–300 ms

30–100 ms

10–30 ms

3–10 ms

< 3 ms

Bound Fluid Volume

Density Porosity

T2 Distribution

0.1 mD 10,000

0.1 mD 10,000

Magnetic ResonancePermeability

FormationPressure-While-

Drilling Permeability

The proVISION Plus service measures magnetic resonance and complements other LWD data to provide advanced petrophysical evaluation of complex reservoirs in real time. By fully evaluating rock and fluid properties with the proVISION Plus service, you can reveal bypassed pay zones and determine permeability.

Using T2 distribution, the proVISION Plus service calculates continuous permeability, lithology-independent porosity, producible and irreducible fluid volumes, and pore size distribution. These capabilities make it possible to identify pay zones in shaly sands that would otherwise be bypassed and accurately determine permeability in heterogeneous carbonates. This evaluation method provides the final piece for a complete petrophysical answer.

RESERVOIR QUALITY

Providing a complete petrophysical answer

ONE MEASUREMENT, FOUR ANSWERS

Sign

al d

istri

butio

n

T2, msec

∫T2=φ

Mineralogy-Independent Porosity

Sign

al d

istri

butio

n

T2, msec

Facies Analysis Pore Size Distribution

Sign

al d

istri

butio

n

T2, msec

Irreducible Water and Free-Fluid

Sign

al d

istri

butio

n

T2, msec

k(NMR)=ƒ(φNMR,T2LM)

Continuous Permeability

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COMPLETION QUALITYBy identifying bypassed pay zones and areas of high permeability, the proVISION Plus service provides information critical to optimizing your completion design. This service provides insight that can improve the effectiveness of your entire completion strategy and creates opportunities to increase production and decrease completion cost.

The service identifies areas of low permeability, helping you make better decisions about where and how to produce. When additional pay zones are discovered, you can use the data to create a targeted completion design.

Using pore size distribution, the proVISION Plus service helps you assess reservoir storage and flow capacity.

Caliper

in10–5 5–10 0 gAPI 150

Gamma Ray

0 cu 40

Formation Sigma

100 m/h 0

Rate of Penetration

0.6 ft3/ft3 0

Neutron Porosity

1.71 g/cm3 2.71

Density

0.6 ft3/ft3 0


0.3 g/cm3 0

0.3 ft3/ft3 0

0.3 ft3/ft3 0

Bound Fluid

Free Fluid


Bound Fluid Volume

Density Porosity Mac

ro p

oros

ityM

acro

mes

o po

rosi

tyM

eso

poro

sity

Mac

ro m

icro

por

osity

Mes

o m

icro

por

osity

Mic

ro m

acro

por

osity

Mic

ro m

eso

poro

sity

Mic

ro p

oros

ity

0.2 ohm.m 2,000

Attenuation Resistivity at 16-in Spacing


Attenuation Resistivity at 40-in spacing

Phase Shift Resistivity, 16-in Spacing


Phase Shift Resistivity, 40-in spacing

0.2 ohm.m 2,000

0.2 ohm.m 2,000

0.2 ohm.m 2,000

0.2 ohm.m 2,000

0.2 ohm.m 2,000

0.3 0

0.50 3.50

Porosity Partitioning

Volu

me

of

mac

ropo

rosi

ty

Mic

ropo

rosi

ty

Volu

me

of

mes

opor

osity

0.01 mD 100

0.01 mD 100

Magnetic ResonancePermeability

Formation Pressure-While-Drilling

Permeability

1.2 g/cm3 3.1

2.19 2.60

Density Image

Density image

0 1

Spectroscopy

Dry-

wei

ght f

ract

ion

of c

lay

Dry-

wei

ght f

ract

ion

of q

uartz

, fel

dspa

r, an

d m

ica

Dry-

wei

ght f

ract

ion

of c

alci

te

Dry-

wei

ght f

ract

ion

of d

olom

ite

Dry-

wei

ght f

ract

ion

of a

nhyd

rite

Dry-

wei

ght f

ract

ion

of p

yrite

SpectroscopySpectroscopySpectroscopy

0.50 6.500.50 6.500.50 6.50

0 ft3/ft3 1

Volumetrics

Illite

Boun

d w

ater

Quar

tzCa

lcite

Dolo

mite

Anhy

drite

Pyrit

eFr

ee w

ater

Oil v

olum

eIrr

educ

ible

wat

er

0.50 10.500.50 10.500.50 10.50

0.3 ms 6,000

0.3 ms 6,000

T2 Logarithmic Mean

T2 Distribution

T2 Cutoff

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While drilling a well with a challenging trajectory to target a complex carbonate reservoir offshore Brazil, an operator required an LWD analysis to identify producible zones.

Schlumberger recommended the proVISION Plus service to evaluate rock and fluid properties and obtain accurate lithology-independent porosity and continuous permeability. In combination with the EcoScope*† multifunction-while-drilling service, logs from the proVISION Plus service would enable the operator to determine if the reservoir required testing, perforation, or acid stimulation.

The high-quality, real-time magnetic resonance data from the proVISION Plus service provided a comprehensive description of the carbonate reservoir rocks, including permeability, to optimize placement of the wellbore. The advanced petrophysical evaluation improved testing and completion design and calculated reservoir producibility for this offshore well.

The proVISION Plus service provided continuous permeability in real time across the entire interval. As a result of data from the proVISION Plus, EcoScope, and StethoScope* formation pressure-while-drilling services, the operator was able to accurately calcuate the producibility of the reservoir.

CASE STUDY

Describing heterogeneous

carbonates

Pay zone

Pay zone

Pay zone

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An operator drilling a deepwater well offshore Africa needed to evaluate potential pay zones in a thinly bedded sandstone reservoir. Because of good vertical connectivity, thinly bedded sandstone reservoirs can contribute to increased well production. However, evaluating potential pay zones within individual sandstone layers is challenging in such complex reservoirs.

Using the proVISION Plus service, a thin-bed analysis was performed to interpret the porosity as it related to well performance. This analysis would help in evaluating the well’s reservoir volumes and capturing the contribution of each pore system.

The thin-bed analysis provided advanced interpretation of the deepwater reservoir’s porosity. The T2 distribution relaxation times enabled the operator to characterize the two laminated sand-shale sequences in real time, resulting in a 60% increase in calculated reserves. Net-to-gross and continuous permeability were also estimated for perforation interval selection and completion design optimization.

CASE STUDY

Predicting production rates

in sandstone

The EcoScope service clearly identified two distinct thin bed pay zones. When the logs from the EcoScope service were combined with logs from the proVISION Plus service, two additional laminated sand-shale sequences were revealed, leading to a 60% increase of reserves in place.

Caliper

10–5 in 5–10 0 gAPI 150 0.6 ft3/ft3 0

0.6 ft3/ft3 0

1.65 g/cm3 2.65

0.68 g/cm3 3.9

0.5 ms 5,000

0.5 ms 5,000 0.3 g/cm3 0 0.1 mD 10,000

0.1 mD 10,0000.6 ft3/ft3 0

0 ft3/ft3 1

0.6 ft3/ft3 0

1.96 2.33

0 10.2 ohm.m 2,000

0 cu 40

100 m/h 0

Rate of Penetration

Formation Sigma

Gamma Ray


Neutron Porosity

Density

Density Image Spectroscopy

Bound Fluid

Free Fluid

T2 Logarithmic Mean

T2 Cutoff


> 300 ms

100–300 ms

30–100 ms

10–30 ms

3–10 ms

< 3 ms

Cumulative Porosity Gross

Cumulative Porosity Net

Magnetic ResonancePermeability Volumetrics

Formation Pressure-While-

Drilling Permeability

Volu

me

fract

ion

of c

lay

Boun

d w

ater

Volu

me

fract

ion

of q

uartz

, fel

dspa

r, m

ica

Volu

me

fract

ion

of c

arbo

nate

sVo

lum

e fra

ctio

n of

pyr

iteFr

ee w

ater

Oil v

olum

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educ

ible

wat

er

Bound Fluid Volume

Density Porosity

Dry-

wei

ght f

ract

ion

of c

lay

Dry-

wei

ght f

ract

ion

of q

uartz

, fel

dspa

r, an

d m

ica

Dry-

wei

ght f

ract

ion

of c

arbo

n

Dry-

wei

ght f

ract

ion

of p

yriteAttenuation Resistivity

at 16-in Spacing




Phase Shift Resistivity at 28-in Spacing


0 unitless 1

Thin-BedAnalysis

0.2 ohm.m 2,000

0.2 ohm.m 2,000

0.2 ohm.m 2,000

0.2 ohm.m 2,000

0.2 ohm.m 2,000

0 m 15

0 m 15

Cumulative Porosity Net

Cumulative Porosity Gross0.5 3.5

Thin-BedAnalysis

Density Image Spectroscopy

T2 Distribution

0.50 4.500.50 8.50

Thin-bedpay zone

Thin-bedpay zone

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proVISION Plus

Measurement Specifications proVISION Plus 675 proVISION Plus 825

Hole size 8.375 to 10.625 in [21.273 to 26.988 cm] 10.25 to 12.625 in [26.035 to 32.068 cm]

Range of measurement

Uncorrected porosity 0 to 100% 0 to 100%

Min. echo spacing 600 us 600 us

T2 distribution 0.5 to 5,000 ms 0.5 to 5,000 ms

Vertical resolution

Static† 4 in [10.16 cm] 4 in [10.16 cm]

Dynamic‡ 10 in at 50 ft/h [25.4 cm at 15 m/h] 20 in at 100 ft/h [50.8 cm at 30 m/h]

10 in at 50 ft/h [25.4 cm at 15 m/h] 20 in at 100 ft/h [50.8 cm at 30 m/h]

Precision§ ±1% ±1%

Depth of investigation†† 14 in [38.1 cm] 17 in [43.2 cm]

Min. mud resistivity‡‡ 0.02 ohm.m 0.02 ohm.m

OthersData capacity 420 operating h 420 operating h

Power supply Turbine Turbine

Combinability Fully compatible with all Schlumberger LWD tools Fully compatible with all Schlumberger LWD tools

Mechanical SpecificationsNominal collar OD 6.75-in [17.15 cm] API tolerance 8.25-in [20.955 cm] Nominal API

Min. ID 2.00 in [5.1 cm] 2.5 in [6.35 cm]

Length 37.31 ft [11.37 m] 38.47 ft [11.73 m]

Weight§§ 3,900 lbm [1,769 kg] 5,800 lbm [2,630 kg]

Thread connections 51⁄2 FH Box API 6 5⁄8 FH Box API

Joint yield torque 46,000 ft.lbf [62,367.628 N.m] 91,000 ft.lbf [123,400 N.m]

Max. operating temperature 300 degF [150 degC] 300 degF [150 degC]

Max. operating pressure 20,000 psi [137.9 MPa] 20,000 psi [137.9 MPa]

Max. flow range††† 800 galUS/min [3 m3/min] 1,200 galUS/min [4.5 m3/min]

Pressure drop constant‡‡‡ 30,000 psi 82,000 psi

Stabilizer§§§

Downhole distance 2.5 ft [0.76 m] 3 ft [0.91 m]

OD range 8.25 to 10.375 in [20.96 to 26.35 cm] 10 to 12.125 in [25.40 to 30.79 cm]

Total flow area (TFA)†††† 14% 14%

Max. dogleg severity

Sliding 16˚/100 ft [16˚/30 m] 14˚/100 ft [14˚/30 ft]

Rotating 8˚/100 ft [8 /̊30 m] 7/̊100 ft [7˚/30 ft]

Max. system shock level 30 min at Shock Level 5 (50-gn threshold or accumulated 200,000 shocks above 50 gn)

30 min at Shock Level 3 (50-gn threshold or accumulated 200,000 shocks above 50 gn)

† From radio-frequency antenna aperture. ‡ With three-level averaging and 1% precision for sandstone configuration. § At 25 degC [77 degF] and with three-level averaging. †† Diameter of cylindrical measurement volume. ‡‡ Providing 90-in [228.6-cm] vertical resolution at 50 ft/h [15.24 m/h] logging speed. §§ Including upper crossover. ††† Minimum and maximum depend on turbine setup. ‡‡‡ Pressure drop, psi = [(mud weight, lbm/galUS) × ((flow , galUS/min)2)]/(Pressure drop constant, psi). §§§ Stabilizer sleeves available in several sizes. †††† TFA in in2 is more than 14% of annular flow section (equivalent collar).

proVISION Plus

slb.com/proVISIONPlus* Mark of SchlumbergerOther company, product, and service names are the properties of their respective owners. † Japan Oil, Gas and Metals National Corporation (JOGMEC), formerly Japan National Oil Corporation (JNOC), and Schlumberger collaborated on a research project to develop LWD technology that reduces the need for traditional chemical sources. Designed around the pulsed neutron generator (PNG), EcoScope service uses technology that resulted from this collaboration. The PNG and the comprehensive suite of measurements in a single collar are key components of the EcoScope service that deliver game-changing LWD technology.

Copyright © 2015 Schlumberger. All rights reserved. 15-DR-0057

The real-time solution for advanced petrophysical evaluation of complex reservoirs.

Find out more about proVISION Plus at slb.com/proVISIONPlus

Provision Plus Lwd

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