Particulate-Based Loss-Prevention Material—The Secrets of Fracture Sealing Revealed!

Kageson-Loe, Nils M.; Sanders, Mark; Growcock, Fred; Taugbøl, Knut; Horsrud, Per; Singelstad, Arne V.; Omland, Tor Henry

doi:10.2118/112595-pa

Cited by 37 publications

(5 citation statements)

References 6 publications

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“…Since forces transmitted at the points of contact are composed of normal forces and frictional (tangential) forces (Johnson 1985), the slot walls support the seal element by both the normal component and the friction component. While the coarse particles set in place as the first barrier, the normal and frictional forces control the equilibrium of the seal.…”

Section: Discussion On Sealing Mechanismmentioning

confidence: 99%

“…The problem also consumes some valuable time spent for regaining the circulating system and solving subsequence problems known as the nonproductive time (Salehi and Nygaard 2012;Almagro et al 2014;Feng et al 2016). The serious concern is that LOC can lead to a well control issue, which can potentially lead to a life-threatening blowout accident (Horn 1950;Kageson-Loe et al 2009). The industry usually performs operations classified as either preventive or corrective approach to eliminate LOC problem (Whitfill and Miller 2008;Kumar and Savari 2011;Ghalambor et al 2014;Feng et al 2016).…”

Section: Introductionmentioning

confidence: 99%

“…Laboratory studies were continuously and comprehensively run to understand how LCM works, how to evaluate the performance, and how to improve the sealing ability in the field application (Scott and Lummus 1955;Abrams 1977;Nayberg 1986;Dick et al 2000;Hettema et al 2007;Kageson-Loe et al 2009;Kefi et al 2010;Clapper et al 2011;Alsaba et al 2014bAlsaba et al , c, 2016. The knowledge of the sealing behavior, capability and limitation helps in selecting and designing proper LCM raw materials, blending, and treatment processes to be applied in the field operations.…”

Section: Introductionmentioning

confidence: 99%

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The effect of testing conditions on the performance of lost circulation materials: understandable sealing mechanism

Jeennakorn

Alsaba

Nygaard

et al. 2018

J Petrol Explor Prod Technol

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Lost circulation materials (LCMs) are added to drilling fluids to mitigate lost circulation (LOC) problems. Designing the fluid requires a good understanding of sealing mechanisms and all the parameters affecting the sealing performance. Laboratory testing apparatus is the key concept for LCM evaluation ensuring successful treatment. The high-pressure test cell containing fracture discs is an effective tool among the broadly designed apparatus. A variety of formulations has been developed from the LCM physical properties. Recently, the testing conditions such as the slot wall angles and the fracture disc thickness were found to have significant effects on the evaluation results. However, the effect of the base fluids, fluid density, types of weighting materials and aging conditions has not been addressed. In this study, two different base fluids, water-based fluids and oil-based fluids, were used to compare the base-fluid effect. Drilling fluid density was raised up using barite and/or hematite to investigate the effect of the weight agents. Barite was sieved to study the effect of fine particles on the sealing. Finally, the dynamic aging tests were conducted in LCM-treated WBF using two temperature levels (200 °F and 400 °F) and two aging periods (24 and 72 h). The results showed that the base fluids affected the sealing performance depending on the complex interaction between the solid particles and the fluids. Adding weighting agents tended to improve the seal integrity. Adding proper size of fine particles improved the LCM sealing performance. Aging conditions affected LCM properties depending on the thermal stability of the materials.

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Section: Discussion On Sealing Mechanismmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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The effect of testing conditions on the performance of lost circulation materials: understandable sealing mechanism

Jeennakorn

Alsaba

Nygaard

et al. 2018

J Petrol Explor Prod Technol

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“…1) Different filter media. By comparing the filter media of domestic and foreign plugging evaluation instruments, such as N. Kaageson-Loe [4] and others reported that particles of different particle sizes were filled between two parallel perforated metal plates to simulate crack walls with different permeability;…”

Section: Instrument Characteristicsmentioning

confidence: 99%

Development and Application of TL-1 New High Temperature and High Pressure Plugging Instrument

Zou¹,

Chun-zhi²,

Wang³

et al. 2021

OJOGas

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In view of the fact that most of the filter media of existing plugging evaluation instruments use steel plates or steel balls, which cannot truly simulate the characteristics of the formation, a new type of TL-1 high temperature and high pressure plugging instrument has been developed. The filter medium of the instrument is the natural stone with different cracks and quartz sand beds with different particle sizes, which can better simulate the adsorption and hang-up effect of the formation on the plugging agent. It is possible to evaluate the plugging effect, pressure-bearing capacity and return pressure of the plugging slurry for different cracks and sand beds of different sizes under different temperatures and pressures. Using new and old instruments to evaluate the plugging effect of the same plugging slurry, it is found that the plugging effect is different from the distribution of the plugging material on the crack surface, the plugging effect and the pressure bearing capacity. The instrument is stable and reliable in operation and simple in operation. It is a new instrument for conducting research on anti-leakage plugging materials and anti-leakage plugging drilling fluid systems.

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“…The plugging materials of various sizes and shapes are mixed with the drilling fluid to bridge, accumulate, and fill in the cracks. This forms a layer of the plugging material that blocks the transmission of fluid pressure and the flow of fluid medium through the cracks.. − However, in the case of severe or total losses, drilling should be halted immediately and plugging slurry, which consists of gunk, cement, and other materials, should be injected into the loss zones to enhance the pressure bearing capacity of the formation . However, the defects of the mentioned LCMs are exposed in practical applications.…”

Section: Introductionmentioning

confidence: 99%

Magnesium Oxychloride and Magnesium Oxysulfate Cements as Temporary Plugging Agents in Geothermal Drilling

Yan,

Pang,

Dong

et al. 2023

ACS Omega

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The development and utilization of geothermal resources are effective ways to alleviate the current haze situation, adjust the energy structure, and achieve energy conservation and emission reduction. Geothermal formations typically contain extensive fracture networks, with fracture openings. These fracture networks can result in substantial losses of the drilling fluid and increased costs for geothermal drilling. Temporary plugging cements are used to solve the problem of lost circulation due to their high strength and high acid solubility. In this paper, two types of temporary plugging materials, magnesium oxysulfate (MOS) cement and magnesium oxychloride (MOC) cement, were prepared. The influence of the plugging agent on the flow field and the force exerted on the solid under the action of the fluid was analyzed using fluid−solid coupling software. The simulation results show that when subjected to a flow rate of 10 m/s, the edge of the cement experiences a significant force, while the stress is not widely transmitted to the middle and rear of the cement. This indicates that the cement has a strong resistance to the fluid flow. The fundamental characteristics of MOC cement and MOS cement, such as compressive strength and setting time, were investigated. The test results show that adjusting the molar ratio of the two types of cements can shorten the setting time by 60% and increase the compressive strength to up to 23 MPa. In addition, the acid solubility of the cement with different ratios of raw materials is above 95%. The plugging performance of these two cements as loss circulation materials was evaluated by using a physical simulation device. The pressure bearing capacity of the MOC cement with different MgO/MgCl 2 •6H 2 O/H 2 O molar ratios ranged between 13.4 and 23.6 MPa. The maximum bearing capacity of the MOS cement can reach up to 18.6 MPa. The results showed that both cements possess excellent plugging and pressure bearing capacity.

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Particulate-Based Loss-Prevention Material—The Secrets of Fracture Sealing Revealed!

Cited by 37 publications

References 6 publications

The effect of testing conditions on the performance of lost circulation materials: understandable sealing mechanism

The effect of testing conditions on the performance of lost circulation materials: understandable sealing mechanism

Development and Application of TL-1 New High Temperature and High Pressure Plugging Instrument

Magnesium Oxychloride and Magnesium Oxysulfate Cements as Temporary Plugging Agents in Geothermal Drilling

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