NMR for Reservoir Parameters Detectionand Conventional Mud-logging Method for Fluids Identification(油层物理参数的核磁共振检测以及常规录井资料在识别油气层中应用).pdf

文档介绍：NMR for Reservoir Parameters Detection
and Conventional Mud-logging Method
for Fluids Identification
中油测井技术服务有限责任公司
Part I
Utilizing NMR Technique to Determine
Reservoir Fundamental Parameters in
Well Site
1. Introduction
2. NMR principle and Parameters
3. Applications of NMR Measurement
1. Introduction
Porosity Permeability
Cap
Gas
Oil Water
Oil Reservoir
Fundamental Saturation Saturation
Parameters
Water
……!
Source
1. Introduction
NMR
Nuclear ic Resonance
formation sample analyzer can
obtain the T2 spectrum real-time
and get reservoir parameters
quickly.
NMR formation sample analyzer
1. Introduction
Cuttings
Side wall Core
Samples
Core
1. Introduction
Derived Reservoir Parameters from Well Site NMR :
Porosity (Φ)
Permeability (K)
Oil Saturation (So)
Free Fluid Saturation (Sm)
Free Water Saturation (Swm)
Irreducible Water Saturation (Swi)
2. NMR Principle and Parameters
NMR distribution and NMR cut off
Origin of NMR distribution Φ
Φe
1 st Pore siz e
spin
2ed
rd
echo th Clay Capillary
FID spin 3 4 Free
bound bound
echo spin spin water
echo echo water water
Inversion
time
TE TE TE TE
T 2
Echo trains NMR distribution
2. NMR Principle and Parameters
Formation Porosity Determined by NMR
1) Calibration
2) Measurement
3) Calculating
the porosity
Calibration curve of NMR porosity
2. NMR Principle and Parameters
Porosity & Permeability Determined by NMR
24 samples, R2=, average relative error: %