KAMAN PENGGUNAAN LOG NMR UNTUK PENENTUAN PARAMETER RESERVOIR DI

• Main Author: Hartono, Widi
• Format: Theses
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/5179
• Institution: Institut Teknologi Bandung

<b>Abstract:<p align=\"justify\"><br /> Minas Field has been produced almost 50 years with an average current production of 150 MBOPD. Recently, Minas has big challenge since it has an average water cut of 97%. Minas field has multiple reservoirs and large area of 12 kms wide and 22 kms long of faulted anticline. More than 1400 wells have been drilled, consisting of producers, injectors, observation and water source wells. About 150 NMR logs have been run to get more accurate reservoir properties.<p align=\"justify\"> <br /> Magnetic Resonance of Imaging Log (MRIL), one of NMR (Nuclear Magnetic Resonance) log, gives a promising deliverables compared to the existing logs, because it detects clay-bound water. The log also calculates the reservoir permeability (\"k\"), effective and total porosity (0, current and initial water saturation (Sw or Swi). Therefore, it may minimize the coring program that in the past have been used to analyze most of the important reservoir properties.<p align=\"justify\"> <br /> The main technology that has been used in MRIL is calculating the hydrogen (H+) contained in the reservoirs, by transmitting the <br /> magnetic resonance into the reservoirs. The amount of H+ counted reflects how much the remaining oil or water in the respective reservoirs. To get more accurate reservoir properties, MRIL is run in the mud with MnNa2EDTA (Manganese Bi Sodium Ethylene Diamene Tetraacetic Acid) as mud additive.<p align=\"justify\"> <br /> Based on this study, NMR permeability has much higher value than either core permeability or FDC-transformed permeability. While NMR porosity in some cases have similar value with core or density derived porosity. Water saturation (Sw) from NMR always has higher value than log derived.