Drilling mud loss in highly porous media and fractured formations has been one of the industry's focuses in the past decades. Wellbore dynamics and lithology complexities continue to push for more research into accurate quantification and mitigation strategies for lost circulation and mud filtration. Conventional methods of characterizing mud loss with filtration data for field application can be time-consuming, particularly because of the interaction between several factors that impact mud loss and filtration. This paper presents a holistic engineering approach for characterizing lost circulation using pore-scale dynamic water-based mud (WBM) filtration data. The approaches used in this study include: factorial design of experiment (DoE), hypothesis testing, analysis of variance (ANOVA), and multiple regression analysis. The results show that an increase in temperature and rotary speed can increase dynamic mud filtration significantly. An increase in lost circulation material (LCM) concentration showed a significant decrease dynamic mud filtration. A combination of LCM concentration and rotary speed showed a significant decrease in dynamic mud filtration, while a combination of LCM concentration and temperature revealed a significant increase in dynamic mud filtration. Rotary speed and temperature combination showed an increase in dynamic mud filtration. The combined effect of these three factors was not significant in increasing or decreasing dynamic mud filtration. For the experimental conditions in this study, the regression analysis for one of the rocks showed that dynamic mud filtration can be predicted from changes in LCM concentration and rotary speed. The results and approach from this study can provide reliable information for drilling fluids design and selecting operating conditions for field application.

References

References
1.
Ezeakacha
,
C. P.
, and
Salehi
,
S.
,
2018
, “
Experimental and Statistical Investigation of Drilling Fluids Loss in Porous Media—Part 1
,”
J. Nat. Gas Sci. Eng.
,
51
, pp.
104
115
.
2.
Chenevert
,
M. E.
, and
Dewan
,
J. T.
,
2001
, “
A Model for Filtration of Water-Base Mud During Drilling: Determination of Mud Cake Parameters
,”
Petrophysics
,
42
(
3
), pp.
237
250
.https://www.onepetro.org/journal-paper/SPWLA-2001-v42n3a4
3.
Allen
,
D.
,
Auzerais
,
F.
,
Dussan
,
E.
,
Goode
,
P.
,
Ramakrshnan
,
T. S.
,
Schwartz
,
L.
,
Wilkinson
,
D.
,
Fordham
,
E.
,
Hammond
,
P.
, and
Williams
,
R.
,
1991
, “
Invasion Revisited
,”
Oilfield Rev.
,
3
(3), pp. 10–23.
4.
Ezeakacha
,
C. P.
,
2014
, “
Experimental Investigation of Particle Bridging and Wellbore Strengthening Effects for Casing While Drilling (CwD) Application
,” Master's thesis, University of Louisiana at Lafayette, Lafayette, LA.
5.
Warren
,
B. K.
,
Smith
,
T. R.
, and
Ravi
,
K. M.
,
1993
, “
Static and Dynamic Fluid-Loss Characteristics of Drilling Fluids in a Full-Scale Wellbore
,”
SPE Western Regional Meeting
, Anchorage, AK, May 26–28, SPE Paper No.
SPE 26069
.https://www.onepetro.org/conference-paper/SPE-26069-MS
6.
Salehi
,
S.
, and
Kiran
,
R.
,
2016
, “
Integrated Experimental and Analytical Wellbore Strengthening Solutions by Mud Plastering Effects
,”
ASME J. Energy Resour. Technol.
,
138
(
3
), p.
032904
.
7.
Ezeakacha
,
C. P.
,
Salehi
,
S.
, and
Hayatdavoudi
,
A.
,
2017
, “
Experimental Study of Drilling Fluid's Filtration and Mud Cake Evolution in Sandstone Formations
,”
ASME J. Energy Resour. Technol.
,
139
(
2
), p.
022912
.
8.
Kiran
,
R.
, and
Salehi
,
S.
,
2016
, “
Thermoporoelastic Modeling of Time-Dependent Wellbore Strengthening and Casing Smear
,”
ASME J. Energy Resour. Technol.
,
139
(
2
), p.
022903
.
9.
Zhao
,
X.
,
Qiu
,
Z.
,
Wang
,
M.
,
Huang
,
W.
, and
Zhang
,
S.
,
2017
, “
Performance Evaluation of a Highly Inhibitive Water-Based Drilling Fluid for Ultralow Temperature Wells
,”
ASME J. Energy Resour. Technol.
,
140
(
1
), p.
012906
.
10.
Montgomery
,
D. C.
,
2013
, “
Introduction to Factorial Designs
,”
Design and Analysis of Experiments
,
8th ed.
,
Wiley
,
Hoboken, NJ
, pp.
183
232
.
11.
Yahia
,
A.
, and
Khayat
,
K. H.
,
2001
, “
Experimental Design to Evaluate Interaction of High-Range Water-Reducer and Anti-Washout Admixture in High-Performance Cement Grout
,”
Cem. Concr. Res.
,
31
(
5
), pp.
749
757
.
12.
Aston
,
M. S.
,
Alberty
,
M. W.
,
McLean
,
M. R.
,
De Jong
,
H. J.
, and
Armagost
,
K.
,
2004
, “
Drilling Fluids for Wellbore Strengthening
,”
IADC/SPE Drilling Conference
, Dallas, TX, Mar. 2–4, SPE Paper No.
SPE-87130-MS
.
13.
Abrams
,
A.
,
1977
, “
Mud Design to Minimize Rock Impairment Due to Particle Invasion
,”
J. Pet. Technol.
,
29
(
5
), pp.
586
592
.
14.
Majidi
,
R.
,
Miska
,
S.
, and
Zhang
,
J.
,
2011
, “
Fingerprint of Mud Losses Into Natural and Induced Fractures
,”
SPE European Formation Damage Conference
, Noordwijk, The Netherlands, Apr. 7–11, SPE Paper No.
SPE-143854-MS
.
15.
Sun
,
Y.
, and
Huang
,
H.
,
2015
, “
Effect of Rheology on Drilling Mud Loss in a Natural Fracture
,”
49th US Rock Mechanics/Geomechanics Symposium
, San Francisco, CA, June 28–July 1, Paper No.
ARMA-2015-345
.https://www.onepetro.org/conference-paper/ARMA-2015-345
16.
Churcher
,
P. L.
,
French
,
P. R.
,
Shaw
,
J. C.
, and
Schramm
,
L. L.
,
1991
, “
Rock Properties of Berea Sandstone, Baker Dolomite, and Indiana Limestone
,”
SPE International Symposium on Oilfield Chemistry
, Anaheim, CA, Feb. 20–22, SPE Paper No.
SPE 21044
.
17.
Ezeakacha
,
C. P.
,
Salehi
,
S.
,
Ghalambor
,
A.
, and
Bi
,
H.
,
2018
, “
Investigating Impact of Rock Type and Lithology on Mud Invasion and Formation Damage
,” SPE International Symposium and Exhibition on Formation Damage Control, Lafayette, LA, Feb. 7–9, SPE Paper No.
SPE 189471-MS
.
18.
Ghalambor
,
A.
,
Salehi
,
S.
,
Shahri
,
M.
, and
Karimi
,
M.
,
2014
, “
Integrated Workflow for Loss Circulation Prediction
,”
SPE International Symposium and Exhibition for Formation Damage and Control
, Lafayette, LA, Feb. 26–28, SPE Paper No.
SPE-168123-MS
.
19.
Ezeakacha
,
C. P.
,
Salehi
,
S.
, and
Bi
,
H.
,
2018
, “
A New Approach to Characterize Dynamic Drilling Fluids Invasion Profiles in Application to Near-Wellbore Strengthening Effect
,”
IADC/SPE Drilling Conference and Exhibition
, Fort Worth, TX, Mar. 6–8, SPE Paper No.
IADC/SPE-189596-MS
.
20.
Lavrov
,
A.
, and
Tronvoll
,
J.
,
2004
, “
Modeling Mud Loss in Fractured Formations
,”
11th Abu Dhabi International Petroleum Conference and Exhibition
, Abu Dhabi, UAE, Oct. 10–13, SPE Paper No.
SPE-88700
.
21.
Fisher
,
R. A.
,
1966
,
The Design of Experiments
,
8th ed.
,
Hafner Publishing Company
,
New York
.
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