Gas-condensate production improvement using wettability alteration: A giant gas condensate field case study

Sheydaeemehr, M.; Behnam, Sedaeesola; Vatani, Ali

doi:10.1016/j.jngse.2014.07.011

Cited by 23 publications

(5 citation statements)

References 5 publications

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“…Alteration of the wettability has been found as an effective and permanent method to increase gas condensate reservoir recovery. Furthermore, the wettability treatment is feasible only near the wellbore region for a low-cost improvement of well productivity . Finding a suitable chemical and evaluating its effectiveness for wettability treatment are crucial steps in any EOR based on wettability alteration.…”

Section: Introductionmentioning

confidence: 99%

“…Different relative permeability curves can represent wettability states as addressed in some studies. ,,,, It is stated that the crossover saturation shifts to the left by changing the wettability from liquid-wetting to gas-wetting. According to Figure , a change in the wettability to gas-wetting shifts the crossover point of the relative permeability curve to the left.…”

Section: Introductionmentioning

confidence: 99%

“…Furthermore, the wettability treatment is feasible only near the wellbore region for a lowcost improvement of well productivity. 68 Finding a suitable chemical and evaluating its effectiveness for wettability treatment are crucial steps in any EOR based on wettability alteration. Common wettability measurement tests are discussed in this section.…”

Section: Introductionmentioning

confidence: 99%

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Wettability Alteration in Gas Condensate Reservoirs: A Critical Review of the Opportunities and Challenges

Kazemi,

Khlyupin,

Azin

et al. 2024

Energy Fuels

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The gas condensate reservoir is classified as a natural gas resource that produces condensate liquid in the reservoir when the pressure in the reservoir drops below the dew point. An innovative strategy to address condensate blockage near the wellbore involves modifying the wettability of the surface of the reservoir rock. This is achieved through chemical treatment, transitioning the surface from a state of strong liquid-wetting to either strong or intermediate gas-wetting. This modern approach effectively mitigates condensate blockage and its associated challenges. Adjusting and sustaining wettability conditions within gas reservoirs requires proper chemicals for a certain reservoir condition. The paper presents a thorough review of wettability and the processes involved in wettability alteration specifically in gas condensate reservoirs. Then, the commonly used wettability alteration chemicals along with their induced flow mechanisms are discussed and reviewed together with a molecular modeling point of view on modern problems of wetting and interfacial phenomena. This paper also focuses on using nanoparticles and fluorochemicals as wettability alteration agents, given that fluorinated nanoparticles are allegedly superior to the chemical wettability altering agents as they change the wettability of the rock surface by modifying both surface energy and surface roughness. This Review indicates the promising use of various nanoparticles along with fluoro materials to enhance ultimate hydrocarbon recovery in gas condensate reservoirs. In the next part, molecular dynamic simulation of imbibition of n-alkanes in kerogen organic slits are presented. The influence of competitive adsorption on multicomponent flows of crude oil and wetting transition on surfaces with molecular roughness are discussed. Actual problems and challenges of molecular modeling methods are also presented.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Wettability Alteration in Gas Condensate Reservoirs: A Critical Review of the Opportunities and Challenges

Kazemi,

Khlyupin,

Azin

et al. 2024

Energy Fuels

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“…They can be used as a supplement to traditional energy to address serious energy shortages. , However, once the bottom hole pressure is lower than the dew point during the development of gas condensate reservoirs, the gas will condense into the liquid phase and accumulate in the area near the wellbore, resulting in a serious decline in gas well productivity. ,− To solve this problem, scholars suggested removing condensate near the wellbore by injecting carbon dioxide or propane. − Nonetheless, the field test proved that this method can only temporarily alleviate but cannot fundamentally solve the puzzle of condensate accumulation. Wettability is a vital parameter that dominates fluid flow and distribution in gas condensate reservoirs. − If the wettability of the area near the wellbore can be changed from liquid-wetting to gas-wetting, the fluid flow capacity will be notably improved to further increase the productivity of gas condensate reservoirs. , …”

Section: Introductionmentioning

confidence: 99%

“…14−16 If the wettability of the area near the wellbore can be changed from liquid-wetting to gas-wetting, the fluid flow capacity will be notably improved to further increase the productivity of gas condensate reservoirs. 17,18 In 2000, for the first time, Li et al proposed wettability near the wellbore be changed from extremely liquid-wetting to as a key strategy to prevent condensate accumulation and pore blockage, increasing gas permeability and consequently enhancing the output of the gas condensate reservoir. 19−21 Afterward, Tang and Firoozabadi reported gas-wetting alteration of sandstone by fluoropolymer.…”

Section: Introductionmentioning

confidence: 99%

Achieving the Super Gas-Wetting Alteration by Functionalized Nano-Silica for Improving Fluid Flowing Capacity in Gas Condensate Reservoirs

Wang

et al. 2021

ACS Appl. Mater. Interfaces

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It is well-known that the production of gas-condensate reservoirs is significantly affected by the liquid condensation near the wellbore region. Gas-wetting alteration can be one of the most effective approaches to alleviate condensate accumulation and improve liquid distribution. However, gas well deliverability is still limited because the wettability of cores is altered only from liquid-wetting to intermediate gas-wetting by using traditional chemical stimulation. To solve this bottleneck problem, herein, we developed a fluorine-functionalized nanosilica to achieve super gas-wetting alteration, increasing the contact angles of water and n-hexadecane on the treated core surface from 23 and 0° to 157 and 145°, respectively. The surface free energy reduces rapidly from 67.97 to 0.23 mN/m. The super gas-wetting adsorption layer on the core surface formed by functionalized nanosilica not only increases the surface roughness but also reduces the surface free energy. The core flooding confirms that the required pressure for displacement is apparently reduced. Meanwhile, the core permeability can be dramatically restored after the super gas-wetting alteration. The microscopic visualization is employed to further understand the impact of fluorine-functionalized nanosilica on the fluid flow behavior and mechanism in porous media. The oil saturation in the micromodel decreases sharply from 48.75 to 7.84%, eliminating the “water locking effect” and “Jiamin effect”, which indicates that the added functional nanosilica effectively improves fluid flow capacity and may contribute to production in the gas condensate reservoirs. In addition, this work reveals the fluid flow behavior and mechanism in the reservoir in detail, which will expand the better application of this material to many oilfields and other mining engineering systems.

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Wettability alteration of reservoir rocks to gas wetting condition: A comparative study

2017

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Productivity of gas condensate reservoirs reduces significantly due to the near wellbore condensate/water blockage phenomenon. A novel, permanent solution to alleviate this problem is near wellbore wettability alteration of reservoir rocks to preferentially gas wetting conditions; industrial chemical materials are good candidates for this purpose, because of their eco‐friendly characteristics, economical price, and mass production. In this paper, a comparative study is conducted on two industrial fluorinated chemicals, MariSeal 800 and SurfaPore M. Static and dynamic contact angle measurements, spontaneous imbibition, and core flooding tests were conducted to investigate the effect of utilized chemical agents on surface wetting behaviour and fluid flow characteristics of rock samples. Contact angle measurements demonstrate that the liquid phase is changed to a non‐wetting phase after chemical treatment and MariSeal 800 has a greater potential to decrease the surface free energy of the calcite surface. Although both chemicals reveal great potential in static contact angle measurements, further experiments were conducted to distinguish between their abilities. Spontaneous air liquid imbibition tests and endpoint relative permeability measurements approved the potential of utilized chemicals to improve liquid phase mobility and decrease critical condensate saturation, which improve production parameters and reservoir productivity. Liquid phase endpoint relative permeabilities of sandstone core samples were improved by factors of 1.74 and 2.62; furthermore, irreducible liquid phase saturations were decreased by factors of 0.68 and 0.5 using MariSeal 800 and SurfaPore M chemicals. The results of this research help efficient selection of chemical agents for further field applications.

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Gas-condensate production improvement using wettability alteration: A giant gas condensate field case study

Cited by 23 publications

References 5 publications

Wettability Alteration in Gas Condensate Reservoirs: A Critical Review of the Opportunities and Challenges

Wettability Alteration in Gas Condensate Reservoirs: A Critical Review of the Opportunities and Challenges

Achieving the Super Gas-Wetting Alteration by Functionalized Nano-Silica for Improving Fluid Flowing Capacity in Gas Condensate Reservoirs

Wettability alteration of reservoir rocks to gas wetting condition: A comparative study

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