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The Formation Mechanism And Log Interpretation Methods Of Low Resistivity Reservoir In Block A

Posted on:2013-09-13Degree:MasterType:Thesis
Country:ChinaCandidate:W QuFull Text:PDF
GTID:2230330374976714Subject:Mineral prospecting and exploration
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This article aimed at the difficult low resistivity reservoir in block A of a oilfile, it began at concept and resource of the low resistivity reservoir, explained that the low resistivity is caused by additional clay, cation exchange capacity and high bound-water saturation, ect, and the effected degree are different in the various temperature and solution salinity. It also discussed how the temperature and pressure affected the a、b、 m、n in the eqution of Archi, and obtained the rule of m and n in the condition of the high temperature and high pressure.On the bases of customary rock-electric experiment, we studied the NMR T2spectrum of the fulled water rock-core and fulled kerosene researched the various rule of NMR datum. The low resistivity oil and water formation can be distinguished by the character of T2spectrum and the average T2value. The method of different-spectrum can also distinguish the low resistivity oil and water,and it can estimate the oil saturation. The method of displaced-spetrum can diatinguish the low resistivity oil and water when the oil is middle sticky.This article also analysed the principle of low resistivity oil reservoir by amounts of experiment study, included the following contents:high cation exchange capacity, high bound water saturation, high solution salinity, drilling liquid and light formation water surrounding.At last, we researched the log interpretation method of the low resistivity, and suggested that cation exchange capacity and clay content can be calculated by the model of multi-minerals clay, and then calculated the water saturation, and judged the low resistivity reservoir.
Keywords/Search Tags:low resistivity, lab testing and analyzing, NMR T2, the principle oflow resistivity oil, model and interpretation method
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