Abstract
Nuclear magnetic resonance (NMR) has many advantages, such as little testing time, no harm to rock specimen, and is widely used in the measurement of reservoir pore structure. 3D printing also has many advantages, such as repeating the printing the same attributes samples, forming sample by known rock pore structure, adding different pores or fractures to sample. For the study of fractured reservoir provides a new train of thought by combining NMR and 3D printing. Nuclear magnetic core analysis is an important work in the study of core, using a T2 spectrum at a certain echo time can also be found in the core fractures. The study, by CT scans to establish reservoir pore structure, based on the basic of adding different attitude fracture forming four fracture characteristics of rock sample, using 3D printing for solid sample, through the analysis of the nuclear magnetic resonance (NMR) of these sample, get the response characteristics of fracture characteristics on the T2 curve, the quantitative calculation of fracture porosity of rock sample, the result accord with to establish the model of fracture porosity is very good. For the study of fractured oil and gas reservoir development the new field.
Highlights
The fracture is the important medium of the reservoir, the important reservoir space, and the good flowing channel
For the study of fractured reservoir provides a new train of thought by combining nuclear magnetic resonance (NMR) and 3D printing
The T2 curve feature has the following characteristics: 1) The T2 curve has three peaks, located at 1000 ms, 40,000 ms, and 150,000 ms; 2) The two low T2 peaks are essentially the same, and the final high T2 peaks are different; 3) 2 # sample peak maximum, 5 # sample peak lowest; 4) 2 # is closer to 3 #. 4 # and 5 # are closer
Summary
The fracture is the important medium of the reservoir, the important reservoir space, and the good flowing channel. Luo et al 224 flowing capacity of the fluid and increase permeability. The existence of fractures will greatly improve the industrial value of petroleum reservoir formation and improve the development significance of petroleum reservoir formation. For dense petroleum reservoir formation, the existence of fractures, can change the nature of the reservoir, the conventional porosity reservoir, change of fracture porosity reservoirs, or porous fractured reservoir
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