Continuous core analysis

Continuous dry coring (without water or mud) of the interval immediately above and below the mobile LNAPL layer seems an obvious way of determining the mobile LNAPL thickness. Standard split-spoon samples are commonly used for this purpose. The use of clear acrylic shelby tubes have also been used with favorable results. However, several problems are associated with coring which results in overestimating the actual thickness of the product. These factors include  

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Continuous core analysis Continuous core analysis with ultraviolet light (natural fluorescence)... 

Glaciochemical horizons not only provide checks on depth-age relationships but are of great intrinsic interest. Continuous chemical analysis of a well-dated core promises to greatly extend and refine the record of explosive volcanism [13]. Each well-dated eruption or other horizon then becomes of use as a time marker for cores where the dating is less precise. 

Fig. 2. Solid-phase arsenic in ppm versus depth in m from a continuous core. The core consists of clayey silt to depth of 28 m, and fine sand thereafter with a silt horizon at 34 m depth. As was measured by digestion with an HCI-HNO3-H2O aqua regia solution followed by inductively coupled plasma mass spectrometry and inductively coupled plasma atomic emission spectroscopy analysis.

Fig. 2. Core description and petrographic data. Grain size is shown as a continuous log. The petrographic data are represented by bars at the appropriate depths, with mineralogy represented (see key). Core analysis data are also displayed on this diagram. There are 99 porosity and permeability datum points.

Core analysis data are displayed as continuous logs in Fig. 2. Porosity varies from > 0 to 19%. Permeability varies from <0.1 mD to > 5000 mD. Porosity and permeability are highest where the rocks are most coarse grained. However, again the correlation is not perfect the tops of the sandbodies tend to have low porosity and permeability values relative to the middle and lower portions of sandbodies (Fig. 2). Consequently, grain size and facies variations cannot be used in isolation to understand or predict variations in reservoir quality. 

The basis for the analysis using the SCM is illustrated in Figure 9.3. The gas film, outer product (ash) layer, and unreacted core of B are three distinct regions. We derive the continuity equation for A by means of a material balance across a thin spherical shell in the ash layer at radial position r and with a thickness dr. The procedure is the same as that leading up to equation 9.1-5, except that there is no reaction term involving (- rA), since no reaction occurs in the ash layer. The result corresponding to equation 9.1-5 is... 

Cd to PA produced a continuous polycrystalline CdS layer on the nanofibers. TEM analysis, which showed a lighter core surrounded by a darker layer, indicated that the hydrophilic portion of the PA was embedded in CdS whereas the hydrophobic core remained unmineralized. 

Cope rearrangement (Continued) 1,5-hexadiene, 170 interaction diagram, 171 orbital analysis, 170-171 oxy-Cope, 170 Copolymerization CO + alkenes, 293-296 interaction diagram, 295 Core Hamiltonian, 35 Correlation diagrams... 

New accessories are continually made available. This unit discusses the basics necessary to conduct SPME analysis for flavor analysis. An automated sampling and injection system is available from Varian. Supelco offers a manual sampling stand setup. Injection liners are available that reduce the injection port volume to presumably produce sharper peaks. Predrilled septa for the GC are available to reduce septum coring. 

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