Well cements are an important aspect of wellbore integrity and recent investigations focus on describing the cement lifetime using, when possible, nondestructive tests like ultrasonic measurements. However, the original API and ASTM testing standards were based on destructive mechanical testing of cements, leading to the decision to investigate the backward and forward compatibility between ultrasonic measurements and mechanical testing, which makes the subject of this work. Ultrasonic cement measurement became a very popular method to assess the mechanical properties of the cement in a nondestructive manner. Since various measurement systems exist on the market, the development of an accurate reference data base that can be used to calibrate such measurements becomes very important. Two major systems have therefore been compared: the ultrasonic compressive strength, using the ultrasonic pulse velocity (UPV) principle, and the unconfined compressive strength (UCS), using the standard testing frame according to API and ASTM standards. The tests have been performed at different curing times, using both devices, on API Class G cements with bentonite and other additives. This paper presents the results of over 200 experiments that have displayed a different UPV response as a function of the additive content. Cement specific UPV versus UCS correlations were established. Thereby, a new level of accuracy was reached. Moreover, it was observed that after a given curing time, depending on the additive and its concentration, the UPV response is not as sensitive as the results yielded by the UCS method. The outcomes are an important step forward to improve and understand the wellbore integrity.

References

References
1.
Nelson
,
E. B.
,
1990
,
Well Cementing, Developments in Petroleum Science
, Vol.
28
,
Elsevier Science
, Amsterdam, The Netherlands.
2.
Keating, J.
,
Hannant, D. J.
, and
Hibbert, A. P.
, 1989, “
Correlation Between Cube Strength, Ultrasonic Pulse Velocity, and Volume Change for Oil Well Cement Slurries
,”
Cem. Concr. Res.
,
19
(5), pp. 715–726.
3.
Salehi
,
S.
,
Khattak
,
M.
,
Ali
,
N.
,
Ezeakacha
,
C. C.
, and
Saleh
,
F. K.
,
2017
, “
Study and Use of Geopolymer Mixtures for Oil and Gas Well Cementing Applications
,”
ASME J. Energy Resour. Technol.
,
140
(
1
), p.
012908
.
5.
Taleghani
,
A.
, and
Klimenko
,
D.
,
2015
, “
An Analytical Solution for Microannulus Cracks Developed Around a Wellbore
,”
ASME J. Energy Resour. Technol.
,
137
(
6
), p.
062901
.
6.
Zhou
,
D.
, and
Wojtanowicz
,
A. K.
,
2011
, “
Annular Pressure Reduction During Primary Cementing
,”
ASME J. Energy Resour. Technol.
,
133
(
3
), p.
031003
.
7.
Zhou
,
D.
, and
Wojtanowicz
,
A. K.
,
2009
, “
Cement Seal Failure at Casing Shoein Shallow Marine Sediments
,”
ASME J. Energy Resour. Technol
,
131
(
2
), p.
023101
.
8.
Shuker
,
M. T.
,
Memon
,
K. R.
, and
Tunio
,
S. Q.
,
2014
, “
Laboratory Investigation on Performance of Cement Using Different Additives Schemes to Improve Early Age Compressive Strength
,”
Res. J. Appl. Sci., Eng. Technol.
,
7
(
11
), pp.
2298
2305
.
9.
Tesinova
,
P.
,
2011
,
Advances in Composite Materials—Analysis of Natural and Man-Made Materials
,
InTech
, Rijeka, Croatia.
10.
Labibzadeh
,
M.
,
Zahabizadeh
,
B.
, and
Khajehdezfuly
,
A.
,
2010
, “
Early-Age Compressive Strength Assessment of Oil Well Class G Cement Due to Borehole Pressure and Temperature Changes
,”
J. Am. Sci.
,
6
(
7
), pp.
38
47
.http://www.hydrorelief.org/frackdata/references/lecolier_2007_durability_portland_cement05_2740_am0607_38_47.pdf
11.
Rao
,
P. P.
,
Sutton
,
D. L.
,
Childs
,
J. D.
, and
Cunningham
,
W. C.
,
1982
, “
An Ultrasonic Device for Nondestructive Testing of Oilwell Cements at Elevated Temperatures and Pressures
,”
J. Pet. Technol.
,
34
(
11
), pp.
2611
2616
.
12.
Trtnik
,
G.
,
Kavcic
,
F.
, and
Turk
,
G.
,
2009
, “
Prediction of Concrete Strength Using Ultrasonic Pulse Velocity and Artificial Neural Networks
,”
Ultrasonics
,
49
(
1
), pp.
53
60
.
13.
Piot
,
B.
,
2009
, “Cement and Cementing: An Old Technique With a Future?,” SPE Distinguished Lecturer Program, Society of Petroleum Engineers, Richardson, TX.
14.
Mountain Cement Company
,
2016
, “
Certificate of Test: Class G Well Cement—Grade MSR
,”
Mountain Cement Company
, Laramie, WY.
15.
Switzer
,
W. L.
,
2016
, “Density of Water,” North Carolina State University, Raleigh, NC, accessed Mar. 7, 2018, https://www.ncsu.edu/chemistry/resource/H2Odensity_vp.html
16.
Halliburton,
2006
, “
Halliburton
Cementing Bentonite (Halliburton Gel),” Halliburton, Houston, TX, accessed Mar. 7, 2018, http://www.halliburton.com/public/cem/contents/chem_compliance/web/h02088-a4.pdf
17.
API
,
2000
, “Specification for Cements and Materials for Well Cementing,” American Petroleum Institute, Washington, DC, Standard No.
API 10A
.https://www.browntechnical.org/products/api-10a-specification-for-cements-and-materials-for-well-cementing.html
18.
Bett
,
E. K.
,
2010
, “Geothermal Well Cementing Materials and Placement Techniques,” United Nations University Geothermal Training Programme, United Nations University, Reykjavik, Iceland, Report No.
10
.https://orkustofnun.is/gogn/unu-gtp-report/UNU-GTP-2010-10.pdf
19.
Friedrich Leuert GmbH
,
2014
, “Mud Balance Product Information,” Friedrich Leuert GmbH, Adendorf, Germany, accessed Mar. 7, 2018, http://www.leutert.com/media/cement/downloads/en/pi_mud-balance_en.pdf
20.
Test Mark Industries
,
2015
, “iD Operators Manual: CM-2500 iD,” Test Mark Industries, Inc., East Palestine, OH.
21.
Proceq Europe
,
2015
, “Operating Instructions: Pundit Lab/Pundit Lab + Ultrasonic Instrument,” Proceq Europe, Schwerzenbach, Switzerland.
22.
Germann Instruments
,
2016
, “PUNDIT Lab (online),” Germann Instruments, Copenhagen, Denmark, accessed Mar. 7, 2018, http://germann.org/wp-content/uploads/2016/06/Pundit.pdf
23.
Test Mark Industries
,
2016
, “CM-2500,” Test Mark Industries, Inc., East Palestine, OH, accessed Mar. 7, 2018, https://www.testmark.net/2500.html
24.
Okrusch
,
M.
,
2009
,
Mineralogie: Eine Einführung in Die Spezielle Mineralogie, Petrologie Und Lagerstättenkunde
,
Springer Verlag
,
Berlin
.
25.
Ted Pella
,
2017
, “Material Hardness Table,” Ted Pella, Inc., Redding, CA, accessed Mar. 7, 2018, https://www.tedpella.com/company_html/hardness.htm
26.
Goodwin, A. R. H.
, and
Trusler, J. P. M.
, 2003, “
6 - Speed of Sound
,”
Exp. Thermodyn.
,
6
, pp. 237–323.
27.
Romanowski
,
2017
, “Interview With Various Testing Equipment Companies,” Private Communication.
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