Review of fundamental studies on lost circulation and wellbore strengthening

Feng, Yongcun; Gray, K. E.

doi:10.1016/j.petrol.2017.01.052

Cited by 136 publications

(44 citation statements)

References 48 publications

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“…Lost circulation (or lost returns) is an undesired event where a smaller amount of drilling fluid is returned from the wellbore than is pumped into it, thus drilling mud is lost into the formation [81,82]. Lost circulation is a major cause of nonproductive time (NPT) in drilling, which can significantly raise operational costs.…”

Section: Lost Circulationmentioning

confidence: 99%

“…Lost circulation is a major cause of nonproductive time (NPT) in drilling, which can significantly raise operational costs. It has been reported that more than 12% of NPTs are due to problems of lost circulation in drilling areas of the Gulf of Mexico (GoM) [81]. Worldwide, the impact of lost circulation on well construction has been estimated to be around two to four billion dollars annually in nonproductive times, drilling fluid loss, and materials used to stem the losses [83].…”

Section: Lost Circulationmentioning

confidence: 99%

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Drilling Fluids for Deepwater Fields: An Overview

Alcázar-Vara¹,

Cortés-Monroy²

2018

Recent Insights in Petroleum Science and Engineering

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The increasing oil demand around the world along with the depletion of onshore and shallow water oil reserves have forced the oil companies moving into the development of deepwater subsea hydrocarbon reservoirs. Drilling fluids play a key role in all drilling operations, but they get a greater relevance in deepwater environments where the technological challenges of drilling at these extreme conditions generate significant operational risks as well as very high costs during the development of this kind of fields. The operational issues and concerns related to the drilling fluid design and application for deepwater fields are generally well known: narrow pore/fracture pressure gradient margins, wellbore stability, clay swelling, gas hydrates formation, formation damage, salt formations, lost circulation, stuck pipe, cuttings transport and environmental and safety aspects. Therefore, the present chapter aims to give an overview on the main challenges and research related to drilling fluid design and application for deepwater fields through the revision of the state of the art of the current and innovative technological solutions reported in literature.

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Section: Lost Circulationmentioning

confidence: 99%

Section: Lost Circulationmentioning

confidence: 99%

Drilling Fluids for Deepwater Fields: An Overview

Alcázar-Vara¹,

Cortés-Monroy²

2018

Recent Insights in Petroleum Science and Engineering

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“…Starch has been widely used in drilling fluids as fluid loss reducers. In drilling fluids, starch decreases the fluid loss by two approaches: on the one hand, the starch absorbs moisture to reduce the free water; on the other hand, vesicular substances formed by starch can enter into the spaces of mud cake to plug the path way of water, and further reduce the fluid loss [18].…”

Section: Static Fluid Lossmentioning

confidence: 99%

“…As hydration heat regulating materials, starches reduce the hydration heat by releasing the sugar chains on the cement particles [18]. This process also elongates the induction period of cement hydration, directly leads to an extension of the cement setting time.…”

Section: Setting Timesmentioning

confidence: 99%

“…The sequence of the decreasing effects of starches on water-immersed compressive The results are in agreement with the viewpoint reported in [33] that polyhydroxy compounds have prolonging effects on cement setting. As hydration heat regulating materials, starches reduce the hydration heat by releasing the sugar chains on the cement particles [18]. This process also elongates the induction period of cement hydration, directly leads to an extension of the cement setting time.…”

Section: Compressive Strengthmentioning

confidence: 99%

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A Study on the Effects of Starches on the Properties of Alkali-Activated Cement and the Potential of Starch as a Self-Degradable Additive

Tan¹,

Zheng²,

Ma³

et al. 2017

Energies

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An urgent problem of geothermal energy source development is how to cut down the production costs. The use of temporary sealing materials can reduce the costs associated with the circulation lost by plugging, and increase the production by self-degradation. Based on the utilization of starches as self-degradable additives in the medical field, this paper investigated the effects of three kinds of starches, namely corn starch (CS), hydroxypropyl starch (HPS) and carboxymethyl starch (CMS) on the properties of alkali-activated cement (AAC). In addition, the thermal properties of starch, the compressive strength and microstructures of the cement with starch were tested, to evaluate the potentiality of starch as self-degradable additive for geothermal cement. The analysis showed that: (1) all the starches have the effect of increasing the apparent viscosity, prolonging the setting time and reducing the static fluid loss of alkali-activated cement; (2) the addition of starch increased the number of pores in 200 • C-heated cement, facilitated the leaching process, and thus promoted the self-degradation; and (3) among the three starches, CMS has the most potential as a self-degradable additive.

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Synthesis and properties of self‐healing hydrogel plugging agent

Bai,

Wang,

Chen

et al. 2023

J of Applied Polymer Sci

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The P(AM‐co‐AMPS)/SA DN hydrogel was synthesized through aqueous polymerization in this study. It formed a crosslinking network with hydrophobic associations between acrylamide (AM) and lauryl methacrylate (LMA), as well as an ionic bond network involving sodium alginate and Ca2+. To enhance its high‐temperature resistance, 2‐acrylamide‐2‐methylpropane sulfonic acid (AMPS) was incorporated into the hydrogel formulation. The structure of the hydrogel was characterized using Fourier transform infrared spectrometer (FTIR), thermogravimetric analyzer (TGA), and scanning electron microscopy (SEM) techniques. Results demonstrated that the hydrogel exhibited excellent temperature resistance and possessed a porous structure. Mechanical testing revealed a high tensile strength of 110 kPa, elongation at break of 995.31%, along with good fatigue resistance and self‐recovery performance during multiple cyclic stretching. Healing experiments indicated that the healing strength of the hydrogel was influenced by temperature variations. Furthermore, pressure plugging tests were conducted on steel models with crack widths of 0.5 and 1 mm, respectively; it was found that the 0.8%P(AM‐co‐AMPS)/SA DN hydrogel could withstand pressures up to 4.5 MPa at a temperature of 70°C. This novel hydrogel material exhibits remarkable mechanical properties along with certain self‐healing capabilities, making it suitable for leak control applications.

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Review of fundamental studies on lost circulation and wellbore strengthening

Cited by 136 publications

References 48 publications

Drilling Fluids for Deepwater Fields: An Overview

Drilling Fluids for Deepwater Fields: An Overview

A Study on the Effects of Starches on the Properties of Alkali-Activated Cement and the Potential of Starch as a Self-Degradable Additive

Synthesis and properties of self‐healing hydrogel plugging agent

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