Abstract
Experimental tests were carried to control lost circulation in the Khabaz oil field using different types of LCMs including Nano-materials. A closed-loop circulation system was built to simulate the process of lost circulation into formations. Two dolomite plugs were used from different depths of the formation of Azkand in Khabaz oil field. The experimentations were carried out to study the effect of different types of LCMs, cross-linked copolymer (FLOSORB CE 300 S), SiO2 NP, and Fe2O3 NP, on mud volume losses as a function of time.
 The rheological measurements of the nanoparticles-reference mud system showed that both of the SiO2 NP and Fe2O3 NP worked best at 1.2 g/l. and the closed-loop circulation system showed that SiO2 NP cured losses by 48.3% and 37.5% for core plugs 5C1 and 1C2 respectively which is better than Fe2O3 NP loss curing which was 37.9% and 31.3% for core plugs 5C1 and 1C2 respectively.
 On the other hand, FLOSORB CE 300 S- Fe2O3 NP-reference mud systems cured losses up to 69% with 0.25g/l FLOSORB CE 300 S and 79.3% with 0.5 g/l FLOSORB CE 300 S which is better than the FLOSORB CE 300 S- SiO2 NP-reference mud systems results.
Highlights
Lost circulation is the complete or incomplete loss of drilling fluids into the well (Miranda, et al, 2017)
The results indicated that 1.2 g/l of SiO2 NP exhibited the highest rheological properties and showed a reduction filter cake thickness in comparison with other concentrations
The performance of SiO2 NP as Lost circulation materials (LCMs) added to the reference mud is better than Fe2O3 NP the reduction in fluid loss is up to of 37.9 % for Fe2O3 NP the and 48.3 % SiO2 NP
Summary
Lost circulation is the complete or incomplete loss of drilling fluids into the well (Miranda, et al, 2017). There are four categories of formations that are in charge of lost circulation and they are: induced or natural formation fractures, cavernous or vugular formations, highly permeable formations, and unconsolidated formations (Ali, et al, 1994) and (Datwani, 2012). Lost circulation materials (LCMs) are used in general to reduce the loss rate, even though the process is not consistent because the materials are chosen by trial (Razzaq & Kzar , 2016). Khabaz structure is positioned between Jambur and Bai Hassan oil fields. This oil field is located to the northwest of Kirkuk city northeast Iraq by approximately 23 km (AlAtroshi, et al, 2018). As well as, optimizing the lost circulation materials consisting with their effect on rheology properties
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
