Apa pemetaan Hydraulic flow unit yang dimaksud seperti kita memetakan mikro
timeline untuk suatu sub-subfacies (katakan lah kita bermain di dunia HC,
suatu sand body dari beberapa sumur yang kita inginkan tebalnya 10-20ft,
kita korelasi secara e-log, fisik, tentunya akan lebih baik bila dibantu
data pressure, kemudian dipetakan dan didapat peta "Hydraulic flow unit map
of X Oil sand".
Terus applikasinya, kita test zona tsb satu persatu oilnyadari X sand (data
tes valid), ternyata hasil oil yang kita dapat seperti yang diharapkan.
Kemudian timbul pertanyaan, apa korelasinya ?, apa ada hydrolic
discontinuity?. Menurut saya cara seperti akan sangat cocok dilakukan oleh
Production Geo & Petroleum Engineer, karena ada validasi. Kalau hanya
sekedar map yang warna-warni tanpa validasi, Petroleum Engineer nya jadi
ngak kurang Pede memakai map Geologist.
Sekedar mengingatkan.
Salam
HF
----- Original Message -----
From: "sanggam hutabarat" <[EMAIL PROTECTED]>
To: <iagi-net@iagi.or.id>
Sent: Tuesday, June 20, 2006 2:04 PM
Subject: RE: [iagi-net-l] Flow unit
orang2 core (Corelab, Lemigas dll) biasanya sudah punya workflow untuk
melakukan hydraulic flow unit study, yang secara umum meliputi: deskripsi
geologi (umumnya core)&petrography untuk mendapatkan model diagenetik dan
lingkungan geologi. Kemudian menentukan reservoir quality index (simplenya
fungsi poro-perm, banyak model/asumsi) lalu studi heterogeneitas batuan
pada level pori-pori batuan termasuk studi akustik dan elektrikal batuan
maka didapat model flow unit. Geologis biasanya concern terhadap
transformasi dan establishment model ini dengan real geology (core level
maupun field/regional level).
detailnya banyak koq di literatur/study (flow unit concepts top2nya tahun
80-90an hampir sejaman dengan sequence stratigraphy)
sgm
==
Budi Sukamto <[EMAIL PROTECTED]> wrote:
Ini ada beberapa key definitions untuk hydraulic flow unit. Lengkap nya
ada
di tecnical paper :
SPE 38679
Early Determination of Reservoir Flow Units Using an Integrated
Petrophysical Method
G. W. Gunter, SPE, Amoco EPTG; J. M. Finneran, Amoco EPTG, D.J. Hartmann
DJH
Energy and J.D.Miller, Amoco E&P
Key Definitions
Due to various working definitions of some of these terms in the
literature,
it is necessary to define the key terms used in this approach:
Rock Types
Rock/Pore Types - are units of rock deposited under similar conditions
which
experienced similar diagenetic processes resulting in a unique
porosity-permeability relationship, capillary pressure profile and water
saturation for a given height above free water in a reservoir (1).
Winland Plot(2,3) - a semi-log crossplot of permeability (mD) versus
porosity (%), with isopore throat lines (R35 Ports).
R35 Ports correspond to the calculated pore throat radius (microns) at 35%
mercury saturation from a mercury injection capillary pressure test. They
can be calculated directly from Winland's equation (eq.1) or other
equations
based on permeability and porosity(4,5). In equation 1, permeability is
input in millidarcies and porosity in percent.
Log R35 = .732 + .588 * log (K) - .864 * log (PHI)......(1)
Flow Units
Flow Unit - is a stratigraphically continuous interval of similar
reservoir
process speed that honors the geologic framework and maintains
characteristics of rock types(6)
K/PHI Ratio on a foot-by-foot basis is a relative measure of reservoir
process speed(7) (RPS) and is a simplified form of diffusivity, ignoring
viscosity and total compressibility.
Storage Capacity - the product of porosity and thickness.
Flow capacity - the product of permeability and thickness.
Flow Unit Speed - (FUS) percent flow capacity divided by percent storage
capacity.
----- Original Message -----
From: "sanggam hutabarat" <[EMAIL PROTECTED]>
To: <iagi-net@iagi.or.id>
Sent: Tuesday, June 20, 2006 12:37 PM
Subject: Re: [iagi-net-l] Flow unit
Mas Mbang
mau share..bisa dua2nya, nyebrang atau dalam satu geological unit.
Biasanya dlm korelasi, hirarki dan resolusi hydraulic flow unit sepadan
dengan facies (atau malah subfacies), lebih detail dari sekedar
depositional environment apalagi depositional system yang 'coarser'
(biasanya setara system tracts yg dibatasi FS atau SB)..dan ini biasanya
berlaku bagus untuk clastics lha kalo karbonat banyak kasus suka2 artinya
flow unit tak sama dgn geological unit
sgm
--
-----Original Message-----
From: Bambang Murti [mailto:[EMAIL PROTECTED]
Sent: Tuesday, June 20, 2006 11:44 AM
To: iagi-net@iagi.or.id
Subject: [iagi-net-l] Flow unit
Balik ke teknikal dulu ah.
Ada yang bisa membantu untuk memberi pencerahan tentang hal berikut:
"Apa sih sebetulnya yang dimaksud dengan korelasi dan pemetaan
berdasarkan hydraulic flow unit"? Cara melakukannya? Apakah suatu flow
unit harus terletak didalam satu geological unit (katakanlah sand yang
sama) atau bisa nyebrang-nyebrang?
Thanks,
Bambang
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