Near Wellbore Asphaltene and Wax Remediation Using In-Situ Heat Generation in Both PCP and Non-PCP Wells: Concept, Operational Challenges &amp; Remedial Solutions

Goenka, Sharad Kumar; Singhal, Joy; Kothiyal, Manish Dutt; Parasher, Arunabh; Tiwari, Shobhit

doi:10.2118/171497-ms

Cited by 11 publications

(2 citation statements)

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“…In Scurry County, Texas, United States, a trial with nanofluid was conducted to treat a paraffin deposit around the wellbore region. Paraffin can plug and restrict the normal flow of oil to the producing well and cause formation damage. − Before treatment of the well with nanofluid, the damaged well was producing approximately 14 m 3 /day together with a water cut of 50%. It was decided to treat the well by using nanofluid to inhibit the deposition of paraffin near the wellbore region.…”

Section: Field and Trial Applications Of Nanotechnology For Formation...mentioning

confidence: 99%

Minireview of Formation Damage Control through Nanotechnology Utilization at Fieldwork Conditions

et al. 2022

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Nanomaterials have been used in the oil and gas industry to improve thermal stability, rheology properties, and reactivity through fluid dispersion into the formation. Nanomaterials in producing wells can control formation damage near the wellbore regions. Foreign fluid invasion to the reservoir rock during drilling, fracturing, completion, enhanced oil recovery, and workover causes an interaction with the rock formation and fluids. This results in formation damage such as clay swelling and deflocculation, solid particle invasion, and asphaltene precipitation, all of which reduce production and lead to significant economic losses. In this review, we present the application of nanomaterials to oilfields as a way of optimizing production with minimal formation damage near the wellbore regions. Also, this review presents how the laboratory experiments from nanomaterials were upscaled to oilfields. The different types of nanomaterials used to control formation damage across producing fields around the world were investigated. This study has shown that nanomaterials are more effective than traditional materials to be used in oilfields for controlling formation damage during various stages of oil and gas development and it recommends that the effect of the relationship between nanoparticle size and type should be explored for effective application. However, because formation damage is caused for a variety of reasons, this work points out that many types of nanomaterials need to be combined to achieve multipurpose mitigation. Furthermore, more research concerning the dispersion of nanoparticles in cement slurry and fracturing fluid should be undertaken.

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Section: Field and Trial Applications Of Nanotechnology For Formation...mentioning

confidence: 99%

Minireview of Formation Damage Control through Nanotechnology Utilization at Fieldwork Conditions

et al. 2022

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“…The primary reason for this is that cold fluid injection leads to cryogenic paraffin deposition and heavy oil condensation, which reduces the permeability of fractures. The proposal of the in situ heat fracturing fluid system is based on the fracturing transformation of low-temperature, low-pressure, low-permeability reservoirs containing wax-bearing heavy oil (Shaoul et al 2009;Goenka et al 2014). This system reduces the cold damage through the addition of heat-generating agents to the fracturing fluid to increase the temperature of the system (Tiwari et al 2014;Collesi et al 1987;McSpadden et al 1986;Ashton et al 1989).…”

Section: Introductionmentioning

confidence: 99%

A new type of experimentally proposed in situ heat/gas clean foam fracturing fluid system

Zhang

Zhao

Tang

et al. 2020

J Petrol Explor Prod Technol

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When cold fluid is injected into low-temperature, low-pressure, low-permeability reservoirs containing wax-bearing heavy oil, cryogenic paraffin deposition and heavy oil condensation will occur, thus damaging the formation. Moreover, the formation pressure coefficient is low and the working fluid flowback efficiency is low, which affects the fracturing stimulation effect. Therefore, an in situ heat/gas clean foam fracturing fluid system is proposed. This system can ensure that conventional fracturing fluid can create fractures and carry proppant in the reservoir, generate heat in situ to avoid cold damage, reduce the viscosity, and improve the fluidity of crude oil. The in situ heat fracturing fluid generates a large amount of inert gas while generating heat, thus forming foam-like fracturing fluid, reducing fluid loss, improving proppant-carrying performance, improving gel-breaking performance, effectively improving crack conductivity, and is clean and environmentally friendly. Based on the improved existing fracturing fluid system, in this paper, a new type of in situ heat fracturing fluid system is proposed, and a system optimization evaluation is conducted through laboratory experiments according to the performance evaluation standard of water-based fracturing fluid. Compared with the traditional in situ heat fracturing fluid system, the fracturing fluid system proposed in this study generates a large amount of inert gas and form foam-like fracturing fluid, reduces fluid loss, enhances the proppant-carrying capacity and gel-breaking performance, improves crack conductivity, the gel without residue and that the gel-breaking liquid is clean and harmless.

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Study on the practice of downhole dewaxing by in situ generated heat

Mao

Chen

et al. 2021

J Petrol Explor Prod Technol

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In situ heat systems are a technology that effectively solves paraffin deposition and improves oil recovery. Generally, the oxidation–reduction reaction of sodium nitrite and ammonium chloride generates a large amount of heat to promote the melting of paraffin. An in situ heat system combined with an acid-resistant fracturing fluid system can form an in situ heat fracturing fluid system, which solves the problem of the poor reformation effect caused by cold damage during the fracturing process of low-pressure and high-pour-point oil reservoirs. In this paper, with the goals of system heating up to 50 °C, a low H+ concentration, a high exotherm, and reduction of the toxic and harmful by-product NOX, the preferred in situ heat system was found to comprise 1.6 mol/L ammonium chloride, 1.0 mol/L sodium nitrite, and 0.8% hydrochloric acid. The effect of five factors on the heat production of the reaction was studied experimentally, and a reaction kinetic equation for the in situ heat system was proposed based on the results. The results showed that increasing the concentration of the reactants and lowering the ambient temperature produced more heat. The in situ heat system was used to conduct a crude oil cold damage elimination experiment, and the results of the removal experiments verified that the system could effectively but not completely reduce the cold damage. Overall, the in situ heat fracturing fluid system formed by the preferred in situ heat system combined with an acid-resistant fracturing fluid system could avoid cold damage in the formation during construction and increase the output.

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Near Wellbore Asphaltene and Wax Remediation Using In-Situ Heat Generation in Both PCP and Non-PCP Wells: Concept, Operational Challenges & Remedial Solutions

Cited by 11 publications

References 0 publications

Minireview of Formation Damage Control through Nanotechnology Utilization at Fieldwork Conditions

Minireview of Formation Damage Control through Nanotechnology Utilization at Fieldwork Conditions

A new type of experimentally proposed in situ heat/gas clean foam fracturing fluid system

Study on the practice of downhole dewaxing by in situ generated heat

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