The voltage between an electrode (M) situated on one of these spheres and the one at infinity is proportional to the resistivity of the homogeneous formation, and the measured voltage can be scaled in resistivity units. 6.3.1.3 Spontaneous potential logs The spontaneous potential (SP) logs ...
ParameterValueUnits Water resistivity 2 Ohm-m Grain density of sand 2650 kg/m3 Cementation exponent 1.8 (sand), 2.7 (clay) – Cation exchange capacity 1.45 (sand), 2560 (clay) C/kg Mobility of counterions in Stern layer 1.5 × 10−8 (sand), 1.5 × 10−10 (clay) m2/sV Mobility ...
As a result of this, it is imperative to understand both the relative contributions from reservoir and cap rock, and the geological significance of any lateral resistivity variation in each of the units. In this contribution, we quantify the resistivity of organic rich mudstone, i.e. source ...
Over 40 years, the detrital aquifer of the Plana de Castellón (Spanish Mediterranean coast) has been subjected to seawater intrusion because of long dry periods combined with intensive groundwater exploitation. Against this backdrop, a managed artificial recharge (MAR) scheme was implemented to impro...
They discovered that the increasing value in pore water conductivity, pH, and sulfate concentration in pore water resulted in a significant decrease in sample electrical resistivity. Moreover, the leachate, which contains a variety of chemical and heavy elements, can lower the resistivity value of ...
免费在线预览全文 User’s Manual Model SC202G [Style: S3], SC202S [Style: S3] 2-wire Conductivity or Resistivity Transmitter IM 12D08B02-01E IM 12D08B02-01E 8th Edition TABLE OF CONTENTS PREFACE 1. Introduction And General Description 1-1 1-1. Instrument check 1-1 1-2. Application...
To rectify the situation, reservoir condition RI experiments were carried out using different techniques on separate reservoir units. The first experiment employed the traditional porous plate with continuous scanning, live crude and hot toluene cleaned core plugs. The second experiment used fresh state ...
(left) Map showing tectonic sub-units of the Southern Sichuan Basin, with the blue rectangular indications that the location of the Changning Block. (right) lithological and stratigraphic figure of the Wufeng–Longmaxi Formation. ((left,right) modified after [7]). In the southern Sichuan Basin...
The real part of impedance, i.e., resistance was then used to calculate resistivity, so as to normalize it for units of length as can be seen in Equation (2), ρ=𝑅𝐴𝑡.ρ=RAt. (2) Similarly, the admittance, Y, is also measured by the HP 4194A impedance analyzer which li...
Excluding long reflectors associated with the contact between stratigraphic units, in general, strong localized reflections are produced by the following: (1) Cavities, (2) water-saturated soil, (3) walls and other building remains, (4) modern public utilities, and (5) modern artifacts [31]....