Implementation of pwls mnemonics in finder under epinet by oil and natural gas corporation ltd
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IMPLEMENTATION OF PWLS MNEMONICS IN FINDER UNDER EPINET by OIL AND NATURAL GAS CORPORATION LTD. LOG DATA MANAGEMENT IN EPINET. Log Data Management is an integral part of EPINET. Original Logs are managed in LogDB in original format.

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Implementation of pwls mnemonics in finder under epinet by oil and natural gas corporation ltd
IMPLEMENTATION OF PWLS MNEMONICS IN FINDER UNDER EPINETbyOIL AND NATURAL GAS CORPORATION LTD.


Log data management in epinet
LOG DATA MANAGEMENT IN EPINET

  • Log Data Management is an integral part of EPINET.

  • Original Logs are managed in LogDB in original format.

  • Edited and spliced logs (Composite Logs) are managed in Finder.

  • Web Based data delivery from both LogDB as well as Finder.


FLOW CHART OF

LOG DATA MANAGEMENT IN EPINET

COMPOSITE LOG*

GENERATION

(GEOFRAME)

ONLINE / NEARLINE

STORAGE

ATTRIBUTE INFORMATION

LOG TAPES

COMPOSTE LOG

MANAGEMENT

(FINDER)

ORIGINAL LOG

MANAGEMENT

(LOGDB)

TRANSCRIPTION

(dlisu)

WEB BASED

DATA DELIVERY

* Composite Log: Spliced Log


Data delivery
DATA DELIVERY

  • Original Logs from LogDB (Petrophysical applications).

  • Composite Logs from Finder (Geological, Geophysical & Petrophysical applications).

  • Web based data delivery to authorized users.


Curves which are spliced and loaded into finder
CURVES WHICH ARE SPLICED AND LOADED INTO FINDER

  • Deep resistivity (if different type of tools are run in different intervals: LLD/ AT90 /RLA5/GRD) or 3/6 resistivities (if same type of tool is run in all the intervals: LLD, LLS, MSFL / ILD, ILM, LL3 / GRD, SGRD, FRXO / AT 90, AT 60, AT30, AT20, AT10, RXOZ / RLA5, RLA4, RLA3, RLA2, RLA1, RXOZ)

  • Density (RHOB / RHOZ)

  • Neutron Porosity (NPHI)

  • Sonic (DT / DTCO / DTL / DTLN / DTLF)

  • Gamma Ray (GR / SGR / GKUT)


Curves which are loaded into finder runwise
CURVES WHICH ARE LOADED INTO FINDER RUNWISE

  • Self Potential (SP)

  • Resistivity (LLD, LLS, MSFL / ILD, ILM, LL3 / GRD, SGRD, FRXO / AT 90, AT 60, AT30, AT20, AT10, RXOZ / RLA5, RLA4, RLA3, RLA2, RLA1, RXOZ)

  • Density (RHOB / RHOZ) along with DRHO & PE

  • Neutron Porosity (NPHI)

  • Sonic (DT / DTCO, DTSM, VPVS / DTL / DTLN, DTLF)

  • Gamma Ray (GR / SGR / GKUT)

  • Spectral Gamma Ray (SGR, CGR, THOR, URAN, POTA/ HSGR, HCGR, HTHO, HURA, HFK)


Challenges faced
CHALLENGES FACED

  • Two different types of tools are used in different intervals.

    • DLL-MSFL-GR (deep resistivity: LLD) recorded in the top interval

    • AIT-MCFL-NGS (deep resistivity: AT90) recorded in bottom interval

  • Proliferation in the number of curve mnemonics

  • A large number of LWD curve mnemonics have further compounded the problem


Solution to the problem
SOLUTION TO THE PROBLEM

PWLS

(Practical Well Log Standards)

Geology SIG of Energistics


FLOW CHART OF

LOG DATA MANAGEMENT IN EPINET

COMPOSITE LOG*

GENERATION

(GEOFRAME)

ONLINE / NEARLINE

STORAGE

ATTRIBUTE INFORMATION

LOG TAPES

COMPOSTE LOG

MANAGEMENT

PWLS STANDARDIZED

(FINDER)

ORIGINAL LOG

MANAGEMENT

(LOGDB)

TRANSCRIPTION

(dlisu)

WEB BASED

DATA DELIVERY

* Composite Log: Spliced Log





The project
THE PROJECT

  • A project to implement PWLS mnemonics was initiated in Mumbai region of ONGC.

  • It has already been implemented in Bassein field.

  • For remaining wells being implemented.

  • After implementation in MR it may be implemented in other regions of ONGC.


Key benefits
KEY BENEFITS

  • Simplified curve mnemonics.

  • User friendliness.

  • True representation of a curve if different types of tools are run in a well.


Key benefits1
KEY BENEFITS

  • For example: For deep resistivity before PWLS implementation:

    • LLD

    • ILD

    • GRD

    • AT 90

    • RLA5

    • ………

  • After PWLS implementation

    • RES_DEP



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