Applicability of Timely Gas Injection in Gas Condensate Fields To Improve Well Productivity

Marokane, D.; Logmo-Ngog, A.B.; Sarkar, R.

doi:10.2523/75147-ms

Cited by 3 publications

(1 citation statement)

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“…If the saturation of liquid is not high enough (less than the critical phase saturation) to allow for liquid flow, then these liquids will accumulate in the pore space, resulting in reduction in both gas and condensate flow rates and hence loss in well productivity. [ 27–37 ] Figure 1 shows a schematic of the phases distribution within the reservoirs as a function of the radial distance from the wellbore. As shown, the liquid will accumulate more near the wellbore area where the pressure drawdown is high.…”

Section: Introductionmentioning

confidence: 99%

Wettability alteration using functionalized nanoparticles with tailored adhesion to the rock surface for condensate banking mitigation

Sayed

Saini

et al. 2021

Can J Chem Eng

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Accumulation of liquids near the wellbore in gas reservoirs can result in what is known as liquid banking, causing loss of gas and liquid production. One of the techniques that can be used to mitigate liquid banking is changing the rock wettability from liquid wetting to neutral wetting, allowing the gas to carry the liquid out of the pore space. Double‐functionalized wettability altering silica (SiO2) nanoparticles (NPs) were developed. The synthesized NPs were functionalized with both fluoro‐silane (F‐SiO2 NPs) and a charged functional group to enable coupling of the NPs to the substrate. Surfaces treated with F‐SiO2 NPs functionalized with coupling functional group showed superior wear and corrosion resistance in high salinity water compared to single‐functionalized F‐SiO2 NPs. By functionalizing 125 nm SiO2 NPs first with polyethylenimine (PEI‐) or N‐(2‐Aminoethyl)‐3‐aminopropyltrimethoxysilane (DAMO‐) l group followed by fluorination, a water contact angle of 120°and decane contact angle of 70° was achieved. Core flow testing performed under realistic reservoir conditions of pressure and temperature showed that F‐SiO2 NPs coated with PEI achieved a 58% improvement in gas and liquid relative permeability, indicating improvement in the surface repellency to liquids and reduction of the trapped liquid phases inside the pore space of the rocks. The developed double‐functionalized NPs achieved similar performance to the commercially used fluorinated surfactants but using less treatment volume. In addition, these double‐functionalized NPs enable one‐step treatment in the field, which results in simpler operations, shorter treatment time, and better treatment economics.

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Section: Introductionmentioning

confidence: 99%

Wettability alteration using functionalized nanoparticles with tailored adhesion to the rock surface for condensate banking mitigation

Sayed

Saini

et al. 2021

Can J Chem Eng

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Studying the impact of condensate blockage on gas production: A review

Sabea¹,

Al-Fatlawi

2022

Materials Today: Proceedings

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Mitigation of Condensate Banking Using Thermochemical Treatment: Experimental and Analytical Study

et al. 2019

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Condensate banking is a common problem in tight gas reservoirs because it diminishes the gas relative permeability and reduces the gas production rate significantly. CO2 injection is a common and very effective solution to mitigate the condensate damage around the borehole in tight gas reservoirs. The problem with CO2 injection is that it is a temporary solution and has to be repeated frequently in the field in addition to the supply limitations of CO2 in some areas. In addition, the infrastructure required at the surface to handle CO2 injection makes it expensive to apply CO2 injection for condensate removal. In this paper, a new permanent technique is introduced to remove the condensate by using a thermochemical technique. Two chemicals will be used to generate in situ CO2, nitrogen, steam, heat, and pressure. The reaction of the two chemicals downhole can be triggered either by the reservoir temperature or a chemical activator. Two chemicals will start reacting and produce all the mentioned reaction products after 24 h of mixing and injection. In addition, the reaction can be triggered by a chemical activator and this will shorten the time of reaction. Coreflooding experiments were carried out using actual condensate samples from one of the gas fields. Tight sandstone cores of 0.9 mD permeability were used. The results of this study showed that the thermochemical reaction products removed the condensate and reduced its viscosity due to the high temperature and the generated gases. The novelty in this paper is the creation of micro-fractures in the tight rock sample due to the in-situ generation of heat and pressure. These micro-fractures reduced the capillary forces that hold the condensate and enhanced the rock relative permeability. The creation of micro-fractures and in turn the reduction of the capillary forces can be considered as permanent condensate removal.

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Applicability of Timely Gas Injection in Gas Condensate Fields To Improve Well Productivity

Cited by 3 publications

References 0 publications

Wettability alteration using functionalized nanoparticles with tailored adhesion to the rock surface for condensate banking mitigation

Wettability alteration using functionalized nanoparticles with tailored adhesion to the rock surface for condensate banking mitigation

Studying the impact of condensate blockage on gas production: A review

Mitigation of Condensate Banking Using Thermochemical Treatment: Experimental and Analytical Study

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