web demo questions

8/11/2019 Web Demo Questions

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Oil and Gas

The basics data format :

1. LAS

2. LIS

3. DLIS

Always we use LAS files. These LAS files has some log formats these are

LLD--Latino log deep(ohms/m)

LLS--Latino log shallow(ohms/m)

MSFL--(Micro spherically focused log(very shallow)(depth of investigation) SPSpontaneous potential (or) self potential (mv)

GRNatural Gamma ray(API)

RHOBDensity log (g/cc)

NPHI(Neutron porosity (pu)

DELT(Internal transit(m sec/H)

DRHODensity correction

The out put :

Vclayvolume of clay

PHIE

PHITTotal porosity

Vsandvolume of sand

Swwater saturation

Sxoflushed zone curves

Rhomamatrix density

Sand stone2.6 gms/cc

Lime stone2.71

Rhofdensity


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DTFluid:

RhoclRhoclaydensity of clay

Phinclnuetron porasity of clay

Grclgamma ray against clay

The basic log analysis:

Load the data(plot control file)

Data ploting

Depth shifting

Match curves if required

Depth scale

Shading patterns

Interpretion

Zone selection

Different parameters


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Files and its units

CALI(IN):

Units :IN

Curve type Caliper

Max value:15.2

Min value:2.8

Mean value:7.5402

DRHO(GM/CC):

Units: GM/CC

Curve type: Drho

Max value:0.4

Min value:-0.42

Description: Density correction

GR:

Units: API

Curve type: Gamma ray

Max value:109.2

Min value:0

Description: Gamma ray

PHIN: (porosity)

Units: V/v

Curve type: Phi

Max value:287.6

Min value:0


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Equations and formulas

SW=RW+RT

SXo= RXo+ RMF

SW= RW(4), Vcaly(4), porosity(4)

GRvc=GR-Gmin/GRmax-Grmin

SP=1-(PSP/SSP)

VCND=Qn-QD/Qnsh-QDSH

RW methods:

1. SSP=-K LOG*(RCALY/RW)

2. Auto method

PHI:

Density

Sonic

Crossplot

Neutron

Archies:

SW=(FRW/Rf)/n=2

((a/Q1m2):rw/RT)


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QUESTIONS

We know the basics about petrophisics.so we have been practicing the IP

software from 28 days.

We know only how to select the LAS files with my own values and plottedthe graph with default values.

So we have many doubts about IP features behind in it.so could you tell me

that what is our main target..? means what we have to find out finally..?

1. How to select to select the LAS files?

2. How to plot the graph with given values?

3. How to process and give final report for LAS files

4. What is LOGPLOT POROSITY? How many methodsare available to find out

the logplot porosity? which one is the best for it.?

5. How to select logplot porosity from IP?

6. How many methods are available for RW?

7. How to select RW from IP?

8. What is cross plot porosity? What is the role of it in IP?

9. How can we selectand computecross plot porosity?

10.What is hydrocarbon corrections? Can we apply hydrocarbon corrections?11.What is vclay porosity? What is the use of it in IP?

12.How many methodsare available to compute the vclay porosity? which one

is the best for us?

13.How to select and compute final vclay porosity and RW parameter for sw

from different method?

14.How to select and compute SW=RW+RT for final report?

15.How can we processing and calculating on the well log file?

16.How can we see the resulted logplot ?can you explain with example?17.What is the use of Depth Shifting in IP?

18.How to perform Depth Shifting from different method? which is the best

for us?

19.Can you explain shading pattern?


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The main questions:

we know how to create a basic 3 track log plot by simply selecting some input

curves like gama ray,resistivity etc...but we don't know how to perform

calculations , processing and how can I see the resulted log plot .Can you

explain me with simple example

1. How to select the logplot porasity from different methods.2. Rw from different methods?

3. How to compute cross plot porosity?

4. can we apply hydrocarbon corrections?

5. how to select final Vclay porosity and Rw parameters for Sw

computation from different methods?

6. How to perform calculations to get final report means Sw=Rw+Rt

and explain clearly?

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