Simulating the Nuclear Magnetic Resonance Response in Organic Rich Shales

2015 ◽  
Author(s):  
Kathryn E. Washburn ◽  
Yaoming Mu ◽  
Jonas Toelke
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
Resonance Response ◽  
Nuclear Magnetic Resonance Response ◽  
Nuclear Magnetic

The effect of tetra-n-butylammonium salts on the nuclear magnetic resonance of nitrobenzene

1968 ◽  
Vol 46 (1) ◽  
pp. 74-74 ◽  
Author(s):  
J. B. Hyne ◽  
A. R. Fabris
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
Aromatic Ring ◽  
Specific Interaction ◽  
Ion Pair ◽  
Carbon Tetra ◽  
Resonance Response ◽  
Nuclear Magnetic Resonance Response ◽  
Nuclear Magnetic

Tetra-n-butylammonium salts effect the nuclear magnetic resonance response of the para and meta protons of nitrobenzene to a greater extent than that of the ortho protons in solutions in carbon tetra chloride. It is suggested that this effect may be due to a specific interaction between the salt, in ion-pair form, and the aromatic ring of nitrobenzene.

Nuclear-Magnetic-Resonance Response of Brine, Oil, and Methane in Organic-Rich Shales

2015 ◽  
Vol 18 (03) ◽  
pp. 400-406 ◽  
Author(s):  
A.. Tinni ◽  
E.. Odusina ◽  
I.. Sulucarnain ◽  
C.. Sondergeld ◽  
C. S. Rai
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
Pore Space ◽  
Transverse Relaxation Time ◽  
Woodford Shale ◽  
Transverse Relaxation ◽  
Resonance Response ◽  
Nuclear Magnetic Resonance Response ◽  
Nmr Methods ◽  
Nuclear Magnetic

Summary The application of nuclear-magnetic-resonance (NMR) methods to evaluate the fluid content in hydrocarbon reservoirs requires the understanding of the NMR response of the fluids present in the rock. The presence of multiple fluids such as liquid, gaseous, or adsorbed phases in nanometer-sized pores (associated with various minerals and organic matter) adds another degree of complexity to the interpretation of NMR data in shales. We present a laboratory study on the NMR responses of brine, oil, and methane in shales at 2 MHz. NMR transverse relaxation time (T2) distributions were acquired on core plugs from the Haynesville, Barnett, and Woodford shale formations. The NMR T2 distributions were acquired after brine (2.5% potassium chloride) and oil (dodecane) imbibition and saturation. After brine imbibition, we observed an increase in porosity at T2 ≤ 1 ms. However, after saturation at increasing pressures we observe a porosity increase at T2 ≈ 6–20 ms. Dodecane imbibition and saturation induced a porosity increase at T2 ≈ 10 ms. The measurements with methane were conducted on Haynesville core plugs at a methane pressure of 4,000 psi. The NMR T2 signal of methane in shales appears to be at approximately 10 ms. These results show that the NMR response of methane and oil is very similar in shales. Monitoring the saturation increase with NMR shows that brine can enter the entire pore spectrum, whereas oil and methane have access only to a fraction of the pore space.

Temperature dependence of polymer-gel dosimeter nuclear magnetic resonance response

2001 ◽  
Vol 28 (11) ◽  
pp. 2370-2378 ◽  
Author(s):  
Vaclav Spevacek ◽  
Josef Novotny ◽  
Pavel Dvorak ◽  
Josef Novotny ◽  
Josef Vymazal ◽  
...  
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
Temperature Dependence ◽  
Polymer Gel ◽  
Gel Dosimeter ◽  
Polymer Gel Dosimeter ◽  
Resonance Response ◽  
Nuclear Magnetic Resonance Response ◽  
Nuclear Magnetic

USE OF NUCLEAR MAGNETIC RESONANCE AND NEW CORE ANALYSIS TECHNOLOGY FOR DETERMINATION OF GAS SATURATION IN PRETTY HILL SANDSTONE RESERVOIRS, ONSHORE OTWAY BASIN

1999 ◽  
Vol 39 (1) ◽  
pp. 437
Author(s):  
P.J. Boult ◽  
R. Ramamoortby ◽  
P.N. Theologou ◽  
R.D. East ◽  
A.M. Drake ◽  
...  
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
Water Saturation ◽  
Pressure Curve ◽  
Core Analysis ◽  
Gas Saturation ◽  
Combined Application ◽  
Nuclear Magnetic Resonance Response ◽  
Log Interpretation ◽  
Nuclear Magnetic

The failure of conventional log interpretation of low resistivity gas-bearing reservoirs in the Lower Cretaceous Pretty Hill Sandstone, onshore Otway Basin, has led to the use of the saturation versus height, Leverett J function as a basis for predicting hydrocarbon saturation.The recent application of a new method of proprietary core analysis (corEVAL™*) in the 1998 gas discovery well Redman–1, allowed the derivation of a more realistic Leverett J function to water saturation transform for the Pretty Hill Sandstone. Furthermore, this transform could be applied beyond the cored interval to the remaining reservoir section by calibrating the core with its nuclear magnetic resonance response. An algorithm, which converts Schlumberger's combinable magnetic resonance (CMR*) cumulative T2 distributions into a pseudo- capillary pressure curve, has been derived enabling the calculation of gas saturation directly from this log. The CMR derived permeability log also assisted in facies differentiation of the reservoir section and in the selection of wireline pressure and formation fluid sampling points.The combined application of nuclear magnetic resonance technology and proprietary core analysis, independently validated by formation sample and test data, resulted in a 30% increase over previous methods, in average gas saturation in the reservoir being calculated. This has lead to a predicted increase in estimated gas in place at the Redman Field

An emerging technology: Nuclear magnetic resonance microscopy

1988 ◽  
Vol 46 ◽  
pp. 1000-1001
Author(s):  
M.J. Hennessy ◽  
E. Kwok
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
Relaxation Times ◽  
Basic Research ◽  
Local Environment ◽  
Magnetic Resonance Images ◽  
Nmr Microscopy ◽  
Mri Scans ◽  
Temperature Relaxation ◽  
Nuclear Magnetic

Much progress in nuclear magnetic resonance microscope has been made in the last few years as a result of improved instrumentation and techniques being made available through basic research in magnetic resonance imaging (MRI) technologies for medicine. Nuclear magnetic resonance (NMR) was first observed in the hydrogen nucleus in water by Bloch, Purcell and Pound over 40 years ago. Today, in medicine, virtually all commercial MRI scans are made of water bound in tissue. This is also true for NMR microscopy, which has focussed mainly on biological applications. The reason water is the favored molecule for NMR is because water is,the most abundant molecule in biology. It is also the most NMR sensitive having the largest nuclear magnetic moment and having reasonable room temperature relaxation times (from 10 ms to 3 sec). The contrast seen in magnetic resonance images is due mostly to distribution of water relaxation times in sample which are extremely sensitive to the local environment.

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