Casing Inspection CAST-V

The newest generation Circumferential Acoustic Scanning tool, the CAST-V made by Halliburton, provides a wealth of information in both open and cased holes. In cased holes, ultrasonic pipe inspection and cement evaluation can now be obtained simultaneously. In open holes, the CAST-V provides complete borehole imaging for accurate formation evaluation.

Operating over a wide range of downhole environments, the CAST-V data can be presented in a variety of two- and three- dimensional formats. Powerful, yet user-friendly imaging analysis software is available to process the images, histograms and curve-type data.

Specifications

Temperature

Rating

Pressure Rating

OutsideDiameter

Length

Weight

350^oF

20,000psi

3.625 in.

215 in.

316 lb

175^oC

137900 kPa

92 mm

5.46m

143 kg

Casedhole Operation

Recommended Range of Casing Sizes*

51/2 to 133/8 in.

139 to 340 mm

Azimuthal Resolution	3.6^o
Vertical Sample Rate	6 in. / 3 in. / 1 in.
Logging Speed	60 ft/min / 30 ft/min / 10 ft/min
Primary curves	Reflected Amplitude, Radius, Acoustic Impedance, and Casing Wall Thickness
Secondary curves	Deviation, Relative Bearing, Compressive Strength, Fluid Transit Time, and Mud Impedance

Primary applications include:

Casing Inspection (Both Thickness And Diameter).
Ultrasonic Cement Evaluation Imaging.
Open Hole Borehole Imaging.
Fracture Detection.

CAST-V – A COST-EFFECTIVE TOOL

FOR CASING INSPECTION AND CEMENT EVALUATION.

CAST-V has been used by Vietsovpetro L&TD for casing inspection and cement evaluation.

Cased hole diagnostic applications provide the following information:

- Detailed radial caliper information, precise perforation location,

- Casing damage inspection, corrosion effects description, real pipe wear identification.

- Evaluation of complex and lightweight cement

	This plot of casedhole logs displays VDL in Track 3 and Impedance map in Track 5. They clearly indicate that interval 2440-2532 m, cement bonding is poor, the lower shows good bonding.
	This plot of casedhole logs displays I.D map in Track 4 and Thickness map in Track 6. They clearly indicate corrosions in interval 1060-1100m