betul, resisitivity bisa digunakan.
beberapa kali saya temukan hasilnya mirip dengan sonic.
tetapi tidak selalu match.
problem utamanya, salinitas batuan mempengaruhi juga resisitivity shale.
kalau salinitasnya homogen, tentu lebih mudah lagi.
|---------+---------------------------->
| | "Bambang Murti" |
| | <[EMAIL PROTECTED]> |
| | |
| | 08/08/2005 09:03 |
| | AM |
| | Please respond to|
| | iagi-net |
| | |
|---------+---------------------------->
>------------------------------------------------------------------------------------------------------------------------------|
|
|
| To: <iagi-net@iagi.or.id>
|
| cc:
|
| Subject: RE: [iagi-net-l] Shale Pore Pressure Prediction - Sand?
|
>------------------------------------------------------------------------------------------------------------------------------|
Satu hal lagi, resistivity trend di shale juga bisa dijadikan guide
untuk memprediksi keberadaan suatu abnormally pressurized zone.
Overpressure dan Underpressure (ini ada ndak?) mestinya tidak terjadi
secara mendadak, jadi mestinya ada trend yang bisa dicermati.
Premisnya, jika derajat kompaksi meningkat, maka conductivity juga akan
meningkat dan otomatis resiprokal resistivitynya akan menurun.
Pertanyaannya adalah (ini mirip iklan), "how low can we go" dengan trend
resistivity ini. Mungkin juga dapat di-identik-kan/dikorelasikan dengan
mud-weight vs stacking velocity ?
Ada yang pernah mencoba untuk melakukan plotting trend resistivity ini ?
Trend yang "normal" sesuai dengan kenaikan derajat kompaksi karena over
burden dan juga trend yang "abnormal" karena mendekati overpressured
zone?
Bambang
-----Original Message-----
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]
Sent: Friday, August 05, 2005 10:24 AM
To: iagi-net@iagi.or.id
Subject: RE: [iagi-net-l] Shale Pore Pressure Prediction - Sand?
kebalik Mas Iwan,
velocity turun, pp naik.
apakah benar2 overpressure atau bukan,
utk velocity look ahead, tidak bisa di check.
kecuali dg di drill. kecuali well known area.
tapi kalau udah well known ngapain juga di look ahead.
cara yang paling 'murah' dan gampang , di flow check saja.
kalau gain ya ditambah mw, kalau nggak yaa continue drilling.
secara sistematis tiap 30m-50m flow check.
Regards,
=============================
AMIR AL AMIN - DKS/OPG/WGO
TOTAL E&P INDONESIE
BALIKPAPAN
(62-542)-534283 - (62)-811592277
============================.
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