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计算
已知:m=n=2,a=b=1,Rw=, POR=16%。读出P17,Fig-14,LLD曲线的电阻率值,作为RT,然后计算So判断是油层或水层或油水同层?
如何从曲线上读数据???
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Ch1 电法测井§ SP测井
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Curve scale
mon problem to logging curves is providing a scale that can be read accurately over the full range of response. For most logs have small range, such as GR, from 10 to 250API, and AC, from 40 to 140 us/ft(100-400us/m), DEN from to g/cm3, but resistivity of rocks vary widely, from to 2000000, even higher. linear scale is not suitable for this case, logarithm scale was employed. To look at the next page:
Ch1 电法测井§ 电阻率测井
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Ch1 电法测井§ 电阻率测井
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5
学会从下面的图上读电阻率的值
幅度差
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什么是电极系
A

M1

M2
Spring弹簧
instrument
A
M1
M2
wireline
电极系
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Main contents of this class
1. Dual lateral logging principle
2. How does DLL tool realize current focused ?
3. The characteristics of DLL curves, for oil, gas, or water
4. Application of DLL data
5. Why did we need developed the microspherically the focused tool ?
6. The principle of MSFL and its application
7. In which condition, we need use DIL
8. The process of Secondary induce EMF generation
9. Application of DIL
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Focused Logging
Ch1 电法测井§ 电阻率测井
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Focused Logging
Figure 1-13 shows a typical focused tool, with bucking electrodes A 1 and A2 generating a current field (solid lines on a constant potential Vo) which focuses the current from the alpha ring (dotted lines). Alpha ring current rates deeply into the formation before the focusing fields e weak enough to allow it to disperse and return to the pickup electrode.
Ch1 电法测井§ 电阻率测井
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