Upload
amel
View
19
Download
3
Embed Size (px)
DESCRIPTION
materi
Citation preview
5/30/2013
1
EXPLORATIONEXPLORATION PROCESSES
Eksplorasi
Eksplorasi dalam migas adalah semua kegiatan dari permulaansampai akhir dalam usaha pencarian dan penambahan cadangan
i bmigas yang baru.
Urutan suatu operasi eksplorasi meliputi proses sebagai berikut: Perencanaan eksplorasi (exploration planning) Operasi survey lapangan Penilaian dan prognosis prospek Pemboran eksplorasi
P b d l i d h Pengembangan dan reevaluasi daerah.
5/30/2013
2
Exploration Review Regional Studies
5/30/2013
3
Exploration Processes
Exploration Review Regional Studies
5/30/2013
4
Exploration Processes
Exploration Review Analog Modelling
Exploration Processes
Exploration Review Regional Studies
Bachtiar, dkk., 2003
5/30/2013
5
Exploration Processes
Exploration Review Geophysical
Exploration Processes
Exploration Review Prospect Generation
5/30/2013
6
Exploration Processes
Exploration Review Drilling Proposal
OPERASI
PEMBORAN
Gambar 3.9. Operasi Pemboran Sumur Nilam H25-35 Vico
Indonesia;A. Well proposal
Sumur Nilam H25-35; B. Rig pemboran;
C. Rotary table; D. Bahan untuk
membuat lumpur pemboran; E. Shale
shaker untuk memisahkan cutting;
F. Peralatan pengamatan cutting
dan oil show.
5/30/2013
7
Exploration Processes
Drilling Operations
z to test the HC potential of the objectives in a safe and reliablemanner
z to acquire data in cost effective manner
Mud LoggingMud LoggingMWDMWDMWDMWDLWDLWD
Wireline LoggingWireline LoggingFormation TestingFormation Testing
CoresCoresSamplesSamples
5/30/2013
8
Exploration Processes
Exploration Review Classification
z Exploration (wild-cat) Drillingto testto acquire date
z Evaluation/Delineation Drillingto determine (delineate) the extent of a discovery
z Development/ Extraction Drillingto extract/ exploit of a previously discovered HCp p y
z Injection Drillingto inject fluids into subsurface (EOR, dump or HC storage)
5/30/2013
9
Rig System Circulation 1
1 Sl h 1. Slush pump2. Swivel3. Kelly4. Bit5. Annular space6. Mud stream down ward7. Shale shaker
(tempat limpahan keratan sumur)8. Suction tank
5/30/2013
10
Rig type
Rig type - Jackups
5/30/2013
11
Rig Type - Submersibles
Rig Type - Drillship
5/30/2013
12
Rig Type Platform (production)
Rig Type - Onshore
5/30/2013
13
Laser Drilling A Concept
RIGSITE CONTRACTOR
5/30/2013
14
WELLSITE GEOLOGIEST: JOB PURPOSES
REFERENCE DEPTH
5/30/2013
15
WELL PROFILES
Drilling Operation - Sequences
30 pile driven until refusal
drill with 17 , enlarge with26 bit
20 conductor casing 120-15026 bit
drill with 12 , enlarge with 17 bit
drill with 12 bit
meter
13 3/8 surface casing surfacelogging
9 5/8 intermediate casingintermediate logging
drill with either 8 3/8 or 8 5/8 bit 7liner final/TD logging
5/30/2013
16
Well Logging
Process of all recording well/ formation data during drilling and after drilling of the well
Categories:Drilling Operation Logs : mud logs
MWDLWD
After Drilling /Wireline Logs : electricalacousticradioactivel t tielectromagnetic
Open-hole loggingCased-hole loggingProduction Logging
Well logging - Purposes
To answer the followings:
z existence of the reservoirsz location (depth) of the reservoirsz thickness of the reservoirsz lithology of the reservoirsz properties of the reservoirs (porosity, homogenity)z vertical and lateral distribution of the reservoirsz type of contained fluid in the reservoirsz fluid saturation and properties (salinity, temperature, pressure)p p ( y, p , p )
Key for well decision