Show/Hide Menu
Hide/Show Apps
Logout
Türkçe
Türkçe
Search
Search
Login
Login
OpenMETU
OpenMETU
About
About
Open Science Policy
Open Science Policy
Open Access Guideline
Open Access Guideline
Postgraduate Thesis Guideline
Postgraduate Thesis Guideline
Communities & Collections
Communities & Collections
Help
Help
Frequently Asked Questions
Frequently Asked Questions
Guides
Guides
Thesis submission
Thesis submission
MS without thesis term project submission
MS without thesis term project submission
Publication submission with DOI
Publication submission with DOI
Publication submission
Publication submission
Supporting Information
Supporting Information
General Information
General Information
Copyright, Embargo and License
Copyright, Embargo and License
Contact us
Contact us
Numerical modeling of counter-current spontaneous imbibition during underbalanced drilling
Date
2012-09-10
Author
Naseri, Masoud
Sınayuç, Çağlar
Metadata
Show full item record
Item Usage Stats
228
views
0
downloads
Cite This
Mud solid and filtrate invasion are the most common causes of formation damage during overbalanced drilling (OBD), which is a method of drilling in which the wellbore pressure remains greater than formation pressure. During the past ten years, underbalanced drilling operations (UBD), which can be defined as a drilling method in which the wellbore pressure is less than formation pressure, has been growing due to their applications such as prevention of lost circulation, reduction of filtration lost in naturally fractured and mature reservoirs. It is very difficult to always maintain the underbalanced conditions in drilling and completion operations during bit changing and tripping operations. In these cases due to the non-existence of internal and external mud cake, there will be high amount of mud solid and filtrate invasion into the formation. Besides these, the potential of formation damage still exist during UBD due to Counter-current Spontaneous Imbibition (COUCSI) process. In this case, for water-based muds the original water phase pressure in the reservoir is less than the irreducible water saturation. Therefore the capillary pressure and wettability characteristics of the formation can result in water invasion from the drilling fluid into the formation. The main goal of this study is modeling of this process for a vertical and horizontal well in a conventional reservoir, which are being derilled using a water-based mud system in an underbalanced mode, investigating the effects of some factors such as amount of underbalanced pressure difference and exposure time. In addition, the amount of invaded water and invasion distance are discussed too. The numerical modeling and resulting governing system of partial differential equations, the descretized forms and initial and boundary conditions are presented. Based on this numerical modeling, it is shown that for high capillary pressure values, the amount of water invasion increases. Moreover, for lower underbalanced differential pressure and higher exposure times, water invasion and invasion distance increases too.
Subject Keywords
Pressure Management
,
Reservoir Fluid Dynamics
,
Formation Evaluation & Management
,
Underbalanced drilling
,
Flow in porous media
URI
https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=84865736074&origin=inward
https://hdl.handle.net/11511/75794
DOI
https://doi.org/10.2118/152412-MS
Conference Name
North Africa Technical Conference and Exhibition 2012: Managing Hydrocarbon Resources in a Changing Environment, NATC (2012)
Collections
Department of Petroleum and Natural Gas Engineering, Conference / Seminar
Suggestions
OpenMETU
Core
Modeling and Experimental Study of Newtonian Fluid Flow in Annulus
SORGUN, Mehmet; Ozbayoglu, M. Evren; Aydın, İsmail (2010-09-01)
A major concern in drilling operations is the proper determination of frictional pressure loss in order to select a mud pump and avoid any serious problems. In this study, a mechanistic model is proposed for predicting the frictional pressure losses of light drilling fluid, which can be used for concentric annuli. The experimental data that were available in the literature and conducted at the Middle East Technical University-Petroleum Engineering (METU-PETE) flow loop as well as computational fluid dynamic...
Design And Evaluation Of Wellbore Strengthening Materials For Fractured Reservoirs
Gargılı, Uğur; Gücüyener, İ. Hakkı; Durgut, İsmail; Doğan, H. Ali; Ay, Ahmet (2022-1-01)
Fractured formations are commonly encountered while drilling carbonate reservoirs. Drilling of fractured formations usually results in lost circulation. In some cases, target zones cannot be reached due severe to lost circulation incidents. Fractures encountered before reaching target zones can be sealed off by using wellbore strengthening materials (WSM). WSM are drilling fluid additives which are specially sized and designed particulates. They are generally used to strengthen the wellbore and to prevent t...
Numerical analyses of flow characteristics in the vicinity of spillway aerators
Kurt, Can; Tokyay Sinha, Talia Ekin; Department of Civil Engineering (2016)
Spillway aerators are used in the spillways that are designed to carry medium to high discharges during their operation. Aerators are aimed to reduce the risk of cavitation in these high velocity flows. Most of the time, design of these aerators are based on physical models and experimental results. However, with the advancement in computational resources, it became possible to analyze the effect of aerators using computational fluid dynamics (CFD). To this end, three-dimensional numerical simulations of su...
Experimental investigation of cuttings transport in horizontal wells using aerated drilling fluid
Gül, Sercan; Parlaktuna, Mahmut; Kuru, Ergün; Department of Petroleum and Natural Gas Engineering (2017)
A new experimental approach has been introduced in this thesis for the cuttings transport in horizontal wellbores with the introduction of drag reducers into the aerated drilling fluids. Advanced Flow Loop System (annular test section of 21 ft. long 2.91-in. ID transparent casing and 1.85 in. OD inner drill pipe) in Middle East Technical University Petroleum and Natural Gas Engineering Department have been used for the experiments. The liquid phase has been water and water-PHPA copolymer mixture where the g...
An Experimental study of silicate polymer gel systems to seal shallow water flow and lost circulation zones in top hole drilling
Ay, Ahmet; Kök, Mustafa Verşan; Gücüyener, İsmail Hakkı; Department of Petroleum and Natural Gas Engineering (2012)
Shallow water flow and lost circulation are frequently encountered problems during drilling top holes of oil, gas or geothermal wells. Plenty of methods have been applied to overcome these problems. Placement of silicate based gel systems is one of the oldest methods to seal such undesired zones. For this study, sodium-silicate based gel system is investigated experimentally. This gel system is deliberately delayed multi-component system mixed as a uniform liquid at the surface but desired to form strong ge...
Citation Formats
IEEE
ACM
APA
CHICAGO
MLA
BibTeX
M. Naseri and Ç. Sınayuç, “Numerical modeling of counter-current spontaneous imbibition during underbalanced drilling,” Cairo, Mısır, 2012, vol. 2, Accessed: 00, 2021. [Online]. Available: https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=84865736074&origin=inward.