Exercise (1):

A given fluid loss, differential pressure, mud cake permeability and exposure time indicate that 20 L of mud filtrate invaded a porous, permeable oil-bearing formation. If the formation thickness, h

is 10 ft, Sor =25%, and borehole diameter, da, is 8 in., calculate the diameter of invasion, di, if

resignal

diameter

(a) 0=40%.

(b) 0=10%.

(c) Sketch and discuss the results of a and b.

Exercise (a) A given find loss, diferential prenes, mud cabe permeatility and ecponue tirse bolicale taa 28 is 10 fe. 5ar 2.5%, and hoechole dimnder, do, is 5 ia, ealculaes the dimiter of anvation, di. if. (a) 43 nighs (b) b=10sin; (c) Shetch and divoss the retuity of a mal b