Kerogen-bound and free hopanoic acids in the Messel oil shale kerogen

• Publisher: Elsevier Science
• Year: 2002
• Weight: 314 KB
• Volume: 43
• Category: Article
• ISSN: 0140-6701
• DOI: 10.1016/s0140-6701(02)85632-6

✦ Synopsis

interpretation of 3-D seismic and log data can be used to predict: (1) mapping between production data and seismic data, (2) reservoir connectivity based on multi-attribute analysis, (3) pay zone estimation, and (4) optimum well placement.

02/01348 Studies of asphaltenes by the use of pulsed-field radlent spin echo NMR

stlund, J-A. et al. Fuel, 2001, 80, (11), 1529-1533. Pulsed field gradient spin echo nuclear magnetic resonance (PFG-SE NMR) has been used to study the self-diffusion of asphaltenes in deuterated toluene. Diffusion coefficients of n-heptane asphaltenes were measured in the concentration range of 0.044-5 wt%. It is shown that the self-diffusion of asphaltenes is well described by a log-normal distribution of diffusion coefficients and that the width of the obtained distribution is broad and independent of the asphaltene concentration in the interval studied. Both asphaltene and toluene diffusion indicates that asphaltenes have a disc-like shape as revealed by a strong concentration dependence on the diffusion coefficients. The diffusion coefficient of aspbaltenes at infinite dilution was 2.2 × 10 -~° m2/s.

02/01349 Synthetic gasoline