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    LST_ABF

    TST_ABFHST_ABF

    LST_MEF TST_MEF

    Seismic Stratigrafi Facies _Muara Enim

    Seismic Reflection Current

    Bagaskara Roshardwiadi.ST 1

    Downlap

    Onlap

    Toplap

    Erotional

    Truncation

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    1st Section

    Repeated Section

    Different Trend Fault Syn ABF &

    Syn MEF

    ABF

    MEF

    Seismic Line Before Reprocessing

    Basic Parameter Control1. Reflection Curent Termination.

    Downlap Onlap

    Toplap

    Erotional Truncation

    2. Similarity Simple/Single Amplitude

    3. Similarity Combination Amplitude

    Ex : Simple/ Single Amplitude Phase

    Onlap

    Downnlap

    Toplap

    Bagaskara Roshardwiadi.ST 2

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    Understanding The Object

    Main Subject

    CBM Exploration

    Target / Purpose Find Coal Existence.

    Type of Coal Layer Laterally.

    Wheres & What Coal

    Formed & the Other Interest

    Zone; Such As : Oil & Gas

    Whats the Relation with

    Quality And Type of Coal or

    Kerogen.

    Isopach Map

    Volumetric

    Objective Corelation Interval

    Top FormationInt MEF

    BottomTop GUF

    Best Quality Seg-Y in TopABFInt MEF.

    Maks Recorded Log Comp

    Top ABFInt MEF Except

    Cinta_Bagas_1.

    Mostly Seg Y Need to

    Reprocessing.

    Bagaskara Roshardwiadi.ST 3

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    Bagaskara Roshardwiadi.ST 4

    LQC Cinta Bagas_1

    GR & SP have good relevant shape whichs reflected

    Subsurface condition; Rmf < Rw :

    Permeable Curve GR & SP ; ( - ) Non Permeable Curve GR & SP ; ( + )

    Resistivity Curve Have good Shape and can use for

    Interpretation ; MSFL > LLS > LLD. Wheres HC

    Bearing ; LLD > LLS >MSFL.

    Coal Bearing High Resistivity.

    Porosity Curve have a good and relevant value to

    Describe subsurface condition.

    Neutron 50 PU Sd 60 PU Coal Bearing ( CBM )

    0 PU Sd 10 PU Carbonate ( Lime,Dolo,Anh)

    Densitas 1.3 gr/cc Sd 1.7 gr/cc Coal Bearing ( CBM )

    2.7 gr/cc Sd 3.0 gr/cc Carbonate ( LDA )

    Pef ; Montmorilionite dominantly in delta Front Env.

    Glouconite Abundant , Mixed , Some Illite in

    Marine Env.

    Carbonate dominantly in Shallow MarineMixed Clay minerall, And Sand Feldsphatic in

    Delta Tide.

    Depth Matching ; less than 1 feet

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    Interest Zone @ Cinta Bagas_1

    Quick Look Analysis IntInterest Interval @ MEFInt MEF

    Coal_1 : 876.25 m - 869.90 m ( MD )Mainly Vitrinite, < 20% exinite, Black, Blck Streak, Britlle,

    Concoidal - Uneven, Medium Ash, Medium Sulfur, Contain

    Resin & Pyrite, Clay Mineral Kaolinite. Lower Delta Env,

    Marsh Facies.

    Coal_2 : 851.44 m - 840.71 m ( MD )

    Mainly Vitrinite, < 20% exinite, Black, Blck Streak, Britlle,

    Concoidal - Uneven, Medium Ash, Medium Sulfur, Contain

    Resin & Pyrite, Clay Mineral Kaolinite. Lower DeltaDeltaFront Env,Marsh Facies

    Coal_3 : 818.39 m - 807.49 m ( MD )

    Mainly Vitrinite, < 20% exinite, Black, Blck Streak, Britlle,

    Concoidal - Uneven, Medium Ash, Medium Sulfur, Contain

    Resin & Pyrite, Clay Mineral Kaolinite. Lower DeltaDelta

    Front Env,Marsh Facies

    HC_1 : 951.19 m - 953.63 m ( MD )SS, MediumFine, sub Angular- Rounded, RippleCrossbed,

    Quartz Mineral, IB silty Sandstone with clay mineral mont.

    Point Bar Facies in Lower Delta.

    HC_2 : 954.88 m - 956.72 m ( MD )

    SS, MediumFine, sub Angular- Rounded, Ripplecrossbed,

    Quartz Mineral, IB silty Sandstone with clay mineral mont,

    Point Bar Facies in Lower delta.

    Bagaskara Roshardwiadi.ST 5

    Point Bar

    Levee

    Marsh

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    Interest Zone @ Cinta Bagas_1

    Lower Delta

    Gas Bearing

    Coal Bearing

    Coal Bearing

    Bagaskara Roshardwiadi.ST 6

    Point Bar

    Levee

    Marsh

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    Interest Zone @ Cinta Bagas_1

    Bagaskara Roshardwiadi.ST 7

    Interest Interval @ ABF Thin coal Layer near in top ABF deposit in dist.

    Mouth Bar delta front env .

    Coal

    Bearing

    Coal

    Bearing

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    Interest Zone @ Cinta Bagas_1

    Bagaskara Roshardwiadi.ST 8

    Interest Zone @ BRF : 1834.33 m - 1968.00 m ( MD )Indicated based on Curve Shape with Ignoring Env Hole.

    No Cutting Report of Oil ShowInt_Zone _1 : 1851.41 m - 1852.62 m

    Silty Sand, Calcareous, WavyLaminated, Rounded ,Carb,Glouconite, Some Clay mineral Chlorite., Carbonat Slope Facies in

    Shallow Marine

    Int_Zone _2 : 1853.07 m - 1854.50 m

    LimeStone, Fossil Abundant, Glouconite, Carb. Slope Facies n Shallow

    Marine.

    Int_Zone _3 : 1855.71 m - 1857.81 m

    Limestone IB with Slty sandshale , Fosil abundant, Clay mineral

    chlorite & glouconite, Carbonat Slope in

    Shallow Marine.

    Int_Zone _4 : 1861.35 m - 1865.33 m

    Limestone IB with Slty sandshale , Fosil abundant, Clay mineral

    chlorite & glouconite, Carbonat Slope in

    Shallow Marine.Int_Zone _5 : 1904.57 m - 1906.35 m

    Sand, Calcareous, WavyLaminated, Rounded, Carb, Glouconite,

    some Clay mineral Chlorite , Carbonat Slope Facies in Shallow Marine

    Int_Zone _6 : 1909.17 m - 1912.34 m

    Sand, Calcareous, WavyLaminated, Rounded, Carb, Glouconite,

    Some Clay mineral Chlorite.

    Carbonat Slope Facies in Shallow Marine

    Int_Zone _7 : 1914.80 m - 1916.23 m

    Limestone IB with Slty sandshale , Fosil abundant, Clay mineral

    chlorite & glouconite, Carbonat Slope in

    Shallow Marine.

    Int_Zone _8 : 1916.81 m - 1919.07 m

    Limestone IB with Slty sandshale , Fosil abundant, Clay mineral

    chlorite & glouconite, Carbonat Slope in Shallow Marine.

    Int_Zone _9 : 1922.01 m - 1925.17 m

    Limestone IB with Slty sandshale , Fosil abundant, Clay mineral

    chlorih & glouconite, Carbonat Slope in Shallow Marine.

    Int_Zone _10: 1928.73 m - 1935.09 m Same with zone 2Int_Zone _11: 1939.84 m - 1946.60 m Same with zone 2Int_Zone _12: 1951.34 m - 1954.38 m Same with zone 2

    Sand, Calcareous, WavyLaminated, Rounded, Carb, Glouconite,

    Some Clay mineral Chlorite. Carbonat Slope Facies in Shallow Marine

    Salinity Changes

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    Bagaskara Roshardwiadi.ST 9

    Gas bearing

    Gas Bearing in

    Sand Calc

    Approx Gas

    Interest Zone @ Cinta Bagas_1

    Rmf < Rw

    Rdeep > RMicro

    Rmf < Rw

    Rdeep > RMicro

    Gas bearing

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    Interest_Zone @ GUF Cinta_Bagas_1 ; 1053.41 m - 1846.30 m ( Md )Int Zone_1 : 1500.95 m - 1501.51 m

    Shale, Clcrs, Chlrt Min, Glouconite, Tidal chanell in

    Delta Front Facies.

    Int Zone_2 : 1550.97 m - 1551.53 m

    Shale, Clcrs, Chlrt Min, Glouconite, Transgresive Shelf in

    Marine Facies.

    Int Zone_3 : 1635.42 m - 1636.05 m

    SandSilty Sand , FineVery Fine, Rounded, Good

    Sorted, X bedRipple , MontmorilioniteIllite clay

    mineral, Tidal Chanel in Delta Front Tide Env.

    Int Zone_4 : 1635.42 m - 1636.05 m

    Silty sand , VeryFine,, Rounded, Good Sorted, X bed -

    Ripple, Lenticular, some Chlorite & Glouconite, Mixed

    Flat in Tidal Flat Delta Front Tide Facies Env.

    Int Zone_5 : Silty sand , VeryFine,, Rounded, Good Sorted, Wavy -Laminated, Lenticular, some Chlorite &

    Glouconite,Transgresive Shelf Facies Marine Env.

    Int Zone_6 : Silty sand , VeryFine,, Rounded, Good Sorted, Wavy -

    Laminated, Lenticular, some Chlorite &

    Glouconite,Transgresive Shelf Facies Marine Env

    Interest Zone @ Cinta Bagas_1

    Bagaskara Roshardwiadi.ST 10

    Interest Interval based on Curve Shape & Ignore Env

    Also Correction.

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    Interest Zone @ Cinta Bagas_1

    Bagaskara Roshardwiadi.ST 11

    Tidal FaciesApp Gas

    Bearing

    Transgresive

    Facies

    Gas Bearing

    Gas Bearing

    Gas Bearing

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    Interest Zone @ Cinta Bagas_1

    App Gas

    Bearing

    Stream delta

    Tide

    FS Event

    Bagaskara Roshardwiadi.ST 13

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    Well Seismic @ Cinta Bagas_1

    Bagaskara Roshardwiadi.ST 14

    AI = x V , RC = 2 x V2 / 1 x V1

    Low AI = Zone Porous = Possibility HC + Water in Bulk Volume

    HC = Oil & GasFausts Relationship

    1,000,000

    2000(Dpt1/6)(3.2808R)1/6

    Dpt = TVD depth in feet

    below ground level (onshore)

    or below seabed (offshore).

    R = resistivity in ohmm.

    Gardners Relationship1,000,000

    4.347826Den4

    Den = density in gm/cm3.

    Correlation Sythetic phase 85 with Log for Interest Interval Ignoring Washed Out

    Coal

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    Well Seismic @ Cinta Bagas_1

    Bagaskara Roshardwiadi.ST 15

    Int.zone

    Int.zone

    Wash Out

    Int.zone

    Int.zone

    Int.zone

    Int.zone Coal

    Coal

    Coal

    App Gas

    App Gas

    App Gas

    Correlation by Syn. Seis using pseudo well ( up ) will have

    maksimum Picking to help Interpretation Fault & Horizon

    adjusting trace by trace correlation with similarity amplitude (

    bottom) even get structure detail but picking just the main line

    well by well interpolation nearest trace ( MEF).quiet enough.

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    Well Seismic @ Cinta Bagas_1

    Bagaskara Roshardwiadi.ST 16

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    Bagaskara Roshardwiadi.ST 17

    Well Seismic @ Cinta Bagas_1

    Washed Out Caused

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    Well Seismic @ Cinta Bagas_1

    Bagaskara Roshardwiadi.ST 18

    Strong Gain Amplitude

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    Bagaskara Roshardwiadi.ST 19

    Well Seismic @ Cinta Bagas_1

    No IndicationTight Formation

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    Well Seismic @ Cinta Bagas_1

    Bagaskara Roshardwiadi.ST 20

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    Well Seismic @ Cinta Bagas_1

    Bagaskara Roshardwiadi.ST 21

    Log Evaluation

    Quick Look

    Result

    Coring, Cutting, FMI, Dip

    MeterSeismicVelocity

    Simply General Lithology +HC Bearing

    Porous Zone

    Interest Interval

    Detail Lithology, O&GShow, GC Analysis, etc

    Interest Interval Interest Interval

    Final Result

    Simply Quick Look Analysis Flow Chart

    Correlated Correlated

    CorrelatedCorrelated

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    Initial Stage or Preidentification Phase for Syn & Log Quick Look Analysis. MEF Interest Interval divided into 4 interval according to curve shape ignore env.hole &

    Correction tool, wheres deposit in pointbar facies thats contain gas bearing according to x-plot

    NPHIRHOB ( Page 6 ) and the interest interval in top is Coal Bearing theres 3 interval deposit in

    levee to marsh lower delta env. Synthetic Seis wheres have AI calculation and RC calculation with

    phase 85 theres similar interval that show peak amplitudo for interest interval.

    ABF according to curve shape theres decreasing neutron porosity with small interval that possibilty

    cause by washed out, according to x-plot no indication of HC bearing except in near top ABF theres

    coal thin layer. Sythethic Seismogram showed theres 3 interval of porous zone deposit in Stream

    mouth bar and Clastic Slope Fill.

    GUF according to synthetic Seismogram show porous zone theres 7 interval and log analysis

    Quick Look theres 7 interval decreasing porosity neutron , some interval might cause by washed

    out. Based on X plot NPHI-RHOB & PEF-RHOB theres 2 interval Show indication of Gas Bearing

    in Tidal ChanelTransgresive Shelf in Delta FrontMarine Env.

    Well Seismic @ Cinta Bagas_1

    Bagaskara Roshardwiadi.ST 22

    Conclusion

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    BRF according to Syn. Seismogram theres only one interval porous zone and Quick Look Analysis

    have 12 interval possibillity layer contain HC or water that might caused by enlargement of hole or

    salinity changes in some interval. X plot NPHI-RHOB indication of Gas bearing showed in 1851 m

    1906 m ( MD ) near on top BRF Carbonat Slope Facies in Shallow Marine Env.

    TAF which is deposit in Delta Front Env based on Synthetic Seismogram theres one interval near on

    top TAF , X-plot NPHI_RHOB no Indication showed HC, X Plot PEF_RHOB have several floating

    point in interest interval thats indicated gas bearing.

    Succesion Vertical divided into 3 System Tract in TAF at lower as 1 st Sedimentation event in Delta

    Front Tide Environment chanell fill facies as LST - Stream Mouth Bar Facies as TST Dist

    Mouth Bar facies as HST. BRF formed in Shallow Marine environment Carbonat Slope Facies, GUF

    as a continuity sedimentation of BRF had two event 1st in Transgresive Shelf Facies in Marine Env

    then Tidal chanell to Flat in Delta Front Tide Env. Then, ABF in Delta front Env with progradation

    sedimentation dominantly showed with clastic Slope Fill Facies in 1st Sedimentation ABF --

    Stream Mouth Bar - Dist Mouth Bar Facies. MEF formed Lower Delta Env with Point Bar Facies

    -- Levee Facies -Marsh Facies.

    Well Seismic @ Cinta Bagas_1

    Bagaskara Roshardwiadi.ST 23

    Conclusion

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    Simple Schematic Well Design

    Bagaskara Roshardwiadi.ST 24

    MSL

    GL

    DF

    TD Perforasi

    Vertical Drilling

    KB MD

    TVD

    TVDSS

    Casing Shoe

    Tubing

    Kelly Bushing

    Elevation Refference

    Rod

    1

    4

    3

    21

    2

    3

    4

    5

    5

    Interest Interval

    Jack Up Rig

    Sea Level

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    Simple Schematic Well Design

    Bagaskara Roshardwiadi.ST 25

    Packer

    Perforasi

    Tubing

    Mud Line

    Plugin In Hole

    26

    Plugin In Hole 17

    1/2

    Plugin In Hole 12

    1/4

    Plugin In Hole 8

    1/2

    Casing Size 20

    Casing Size 13 3/8

    Casing Size 9 5/8

    Casing Size 5 1/2

    Well Head

    Blind Ram

    Pipe Ram1

    2

    3

    4

    5

    6

    6

    5

    3

    2

    1

    7

    7

    88

    9

    910

    11

    12

    10

    11

    12

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    Simple Schematic Well Design

    Bagaskara Roshardwiadi.ST 26

    Well Design

    Well Head

    Pipe Ram

    Blind Ram

    Bag Preventer

    Mud return

    Xmas Tree

    Perforasi

    Packer

    Casing Shoe

    Tubing

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    1st Section

    2nd Section Repeated

    3rd Section Repeated

    chanel proximalproximal

    Seq. Dep

    Transgresive Stand

    Coal Bearing

    88EO-017

    Bagaskara Roshardwiadi.ST 27

    chanel

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    Bagaskara Roshardwiadi.ST

    28

    3rd Section Repeated

    2nd Section Repeated

    1st Section

    90EO-006

    28

    C 2 C

    Prox - Medial

    Chanel

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    88EO-017

    LST

    TST

    HST

    Chanell Meandering

    Spliting Coal Bearing Pinch Out Coal Bearing

    Bagaskara Roshardwiadi.ST 29

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    30

    Meandering Chanel

    Cut Off

    Slope

    Stream Mouth

    Bar

    Bell Shape Patern w Interbedded

    Characteristic Curve Patern P2M Chanell

    90EO-006

    Bagaskara Roshardwiadi.ST 30

    Low System Tract

    Transgresive Sytem

    Tract

    High Stand System TractSeqeunce

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    31

    88EO-025

    Bagaskara Roshardwiadi.ST 31

    1st Section

    2nd Section Repeated

    3rd Section Repeated

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    32

    1st Section

    2nd Section Repeated

    3rd Section Repeated

    ChanellProx Prox

    Bagaskara Roshardwiadi.ST 32

    84PK-006

    Chanell

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    33

    LST

    TST

    HST

    LST

    TST

    HST

    Large bell

    Shaped

    Medium

    bell Shaped

    Small bell

    Shaped

    1 Sequence

    Sequence

    84PK-006

    Bagaskara Roshardwiadi.ST 33

    Chanel Evolution

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    LST

    TST

    HST

    LST

    TST

    HST

    s

    e

    q

    u

    e

    n

    c

    e

    s

    e

    q

    Coal Bearing

    TST

    Coal Bearing

    HST

    LST

    TST

    HST

    s

    e

    q

    u

    en

    c

    e

    2 Seq

    Seq

    Straight

    Chanel

    Meandering

    Chanel

    Chanell Evolution

    84PK-006

    Bagaskara Roshardwiadi.ST 34

    Abandoned

    Chanell

    Repeated Curve

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    Downlap

    Downlap +

    Onlap

    Downlap +

    Toplap

    Spliting Coal

    Bearing

    LST

    TST

    HST

    Chanell Reflection

    Properties

    84PK-006

    Bagaskara Roshardwiadi.ST 35

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    3rd Section Repeated

    2nd Section Repeated

    1st Section

    Chanell Prox Chanell ProxProx

    ChanellProxAbandon ChanellProx Abandon Chanell

    88KG-214

    Bagaskara Roshardwiadi.ST 36

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    Bagaskara Roshardwiadi.ST 37

    88KG-214

    Pseudo Well

    Cinta Bagas_2

    Characteristic M2D Chanell

    Approx TF2TC

    2Sequence

    1Sequence

    1/2Sequence

    TST

    LST

    HST

    LST

    TST

    HST

    LST

    TST

    HST

    TST

    LST

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    Bagaskara Roshardwiadi.ST 38

    88KG-214

    Braided Chanel tomedial chanell w Bell

    Shaped Interbedded

    Char,

    Sily sand to Mud d w

    Irregullar Shaped

    Char, coal thin layer

    existence

    Mud Dominated

    Funnell Shaped Char,

    coal thin layer existence

    Levee to Medial

    Chanell w Bell Shaped

    Interbedded Char,

    Existence

    Braided Chanell w

    Irregullar Shaped

    Char,

    Sheet Sand w

    Cylindrical Shaped

    Char,

    LST

    TST

    HST

    Downlap

    Onlap

    Toplap

    Chanell Reflection Properties

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    88TS-03

    Bagaskara Roshardwiadi.ST 39

    1st Section

    2nd Section Repeated

    3rd Section Repeated

    Chanell LeveeProxMedial

    LST

    TSTHST

    Downlap

    Onlap

    Toplap

    Spliting Coal

    Bearing

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    71TM_37A

    B k R h d i di ST 40

    3rd Section Repeated

    2nd Section Repeated

    1st Section