Ecuaciones de perforacion

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Planning Direction of wellbore using single equation methods Wiggins

TVD1 r1

I TVD2



TVD3

I

X

TVD4

I

r2

DEP2

DEP3

DEP4

Survey using Radius ofcurvature methods



T





T –ƒ

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T

T


T

T




Survey using Minimum of curvature Methods
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In radians

In radians


Inradians
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In radians
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In degree In degree

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Closure assuming wellhead coordinate are 0.00 N and 0.00 E
 Vertical section
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Note: When Closure direction of survey has been settled, use the value of given Closure Direction to find Vertical Section (you will find negative value ofVertical Section in Target Depth) Dogleg severity
       







an inclination of 5°.

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 This equation is simple but not very accurate below•‹

At the Report you ll have to plotted
Horizontal view which is a plot of Vertical Section to True Vertical Depth Plane view which is a plot of East to North Inclination Changewhich is a plot of Inclination to True Vertical Depth Azimuth Change which is a plot of Azimuth to True Vertical Depth Dogleg Severity which is a plot of Dogleg Severity to True VerticalDepth

Nomenclature Br DEP I I1 I2 L MD = Build rate, degrees/ft = Horizontal departure, ft. = Inclination or hold angle, degrees = Inclination angle at upper survey point, degrees =Inclination angle at lower survey point, degrees = Length of the first hold section, ft = Measured depth, feet.

R r1 r2 TD TVD X

= Total radius of curvature, ft = Radius of curvaturein the first build section, ft = Radius of curvature in the drop section, ft = Target depth, feet. = True vertical depth, ft. = Tangent calculation = Change in parameter value

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