..., as shown in Fig. 2. This method assumes that there is a single calibration factor that can consider the pore volume to surface ratio as well as surface relaxivity. The same methodology was also implemented in a case study by Conroy et al. (2010). From this subsequent study, it was found...

... sedimentary rock geology geologist log analysis spwla-2024-0145 calibration permeability fluid dynamics clastic rock rock type well logging reservoir characterization mobility baker hughe spwla 65 university relaxation flow in porous media viscosity th annual logging symposium...

... relaxation responses of different fluids. The SASP approximation, to de-smear volumes of different fluid types, is validated with field measurements from multiple wells. The uplift of the SASP technique in improving fluid volume interpretations is apparent in the in-situ calibration of low-SNR moving-pass...

... ABSTRACT NMR and dielectric measurements provide unique petrophysical tools to probe the molecular dynamics of restricted geometries. Both techniques exhibit time-dependent relaxations sensitive to electromagnetic surface interactions and to diffusion length scales. However, diffusion rates...

... coefficient spectra spwla-2023-0105 china government china university log analysis relaxation porosity experiment SPWLA 64th Annual Logging Symposium, June 10-14, 2023 DOI: 10.30632/SPWLA-2023-0105 TEMPERATURE EFFECTS ON NMR RESPONSES IN POROUS MEDIA Zhen Xie, Lizhi Xiao*, Guangzhi Liao, Sihui Luo...

... measurements and log data which led to the modification of the NMR acquisition program in the field and creation of a data-driven petrophysical model based on only NMR and image log measurements for carbonate reservoirs. complex reservoir porosity tool 1 upstream oil & gas relaxation well...

.... The image data is averaged over a moving window, and a transform is constructed, which calibrates the average image data to porosity. This transform is then applied to the "pixel-by-pixel" image data, and a moving adjustment for bias is made. The second step is to analyse the T 1 and T 2 relaxations...

... and materials drilling fluid formulation cutoff reservoir characterization artificial intelligence fluid loss control reserves evaluation drilling fluid chemistry well logging estimates of resource in place upstream oil & gas viscosity sidetrack symposium june 24 formation oil relaxation...

... temperatures, from 22 °C to 90 °C, show that the relaxation time T2 s of hydrocarbon components increase with temperature due to molecular mobility increasing but at different rates, implying that hydrocarbons present in different environments (e.g., organic and inorganic pores) within these tight core samples...

... ABSTRACT At low viscosities, it is well known that the NMR T 1 and T 2 relaxation times of bulk fluids are inversely proportional to viscosity. However, one of the much debated mysteries in NMR relaxation measurements of crude oils is the departure from expected theoretical trends...

... of the grain matrix contains a variation of fine- grained silicate and carbonate minerals such as illite/smectite, chlorite, kaolinite, quartz, k-feldspar, calcite, dolomite, and pyrite, etc. Different minerals impact NMR relaxation very differently. Paramagnetic-rich minerals will accelerate the relaxation...

... T1 and T2 components with high accuracy and precision in low porosity formations while maintaining acceptable logging speeds. This measurement capability was made possible by enabling a new pulse sequence that greatly enhances the sensitivity to fast relaxing components. The robustness of the data...

...SPWLA 56 th Annual Logging Symposium, July 18-22, 2015 1 DETERMINATION OF WETTABILITY FROM MAGNETIC RESONANCE RELAXATION AND DIFFUSION MEASUREMENTS ON FRESH-STATE CORES Chanh Cao Minh, Steve Crary, Philip M. Singer, Andrea Valori, Nate Bachman, Schlumberger Gabor Hursan, Shouxiang Ma, Ali Belowi...

... information. log analysis Engineering West Africa Upstream Oil & Gas well logging facies statistical approach Symposium reservoir blind well spwla 56 formation testing fracture permeability relaxation carbonate resistivity fracture density porosity Halliburton tight test...

... for presentation at the SPWLA 55th Annual Logging Symposium held in Abu Dhabi, United Arab Emirates, May 18-22, 2014. ABSTRACT Nuclear magnetic resonance (NMR) measure- ments have been used as a way to evaluate reservoir rocks based, on the longitudinal and transverse relaxation times, T1 and T2, and the time...

... follows is a brief overview of the measurements performed on these unconventional samples. NMR MEASUREMENTS Overview. In NMR measurements the proton (hydrogen nuclei) spins of the fluids within the pore space are manipulated by a magnetic field and their relaxation is measured. The initial amplitude...

... of resistivity contrast between the two makes it difficult, if not impossible, to make such differentiation using conventional logs. However, the NMR response in bitumen-rich zones is dominated by short transverse relaxation times (T 2 ) and low apparent fluid hydrogen index, providing an opportunity to identify...

... the sections which are suitable for completion using a pre-selected mesh size. spwla 51 Upstream Oil & Gas log analysis information porosity Symposium reservoir relaxation mesh size Australia size distribution grain size distribution petrophysicist well logging decay nuclear magnetic...

... Knowledge of viscosity is required to develop and manage heavy oil reservoirs. There are good correlations between viscosity and NMR relaxation time for relatively light oils. However, highly viscous (heavy) oils fail to follow these correlations. Numerous papers discuss the use of NMR...

... The NMR relaxation response of porous reservoir rock is frequently used to gain length scale estimates of pore morphology. These pore size distributions are often anchored by experiments like mercury intrusion capillary pressure. In practice this means that a constant surface relaxivity is found...