Study and Application of a Gelled Foam Treatment Technology for Water Shutoff in Naturally Fractured Reservoir

Wang, Y.; Bai, Bin; Zhao, Fenfang

doi:10.2118/2008-037

Cited by 4 publications

(3 citation statements)

References 10 publications

(11 reference statements)

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“…Core flooding tests showed that the residual resistance factors were 64−180 for blocking the wormholes, indicating that the foamed gel system can significantly decrease permeability to the flow of water in high-permeability zones like wormholes. Wang et al 156 reported a study and application of a foamed gel treatment for water shutoff in a naturally fractured reservoir (55 °C) in the Xinjiang oilfield. The polymer gelant (200 m 3 ) containing 0.25% PAM, 0.1% Cr 3+ , 0.2% Na 2 SO 3 , and 0.1% SDS was foamed by 9000 std m 3 nitrogen (50 m 3 in reservoir conditions).…”

Section: Foamed Gelsmentioning

confidence: 99%

Polymer Gel Systems for Water Management in High-Temperature Petroleum Reservoirs: A Chemical Review

2017

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Polymer gel systems as water management materials have been widely used in recent years for enhanced oil recovery applications. However, most polymer gel systems are limited in their ability to withstand the harsh environments of high temperature and high salinity. Those polymer gel systems that can handle high-temperature excessive water treatments are reviewed in this paper and categorized into three major types: in situ cross-linked polymer gels, preformed gels, and foamed gels. Future directions for the development of polymer gel systems for high-temperature conditions are recommended. For excessive water management with temperatures from 80 to 120 °C, current polymer systems are substantially adequate. Polymer gel systems composed of partially hydrolyzed polyacrylamide (HPAM)/chromium can be combined with nanoparticle technology to elongate their gelation time and reduce the adsorption of chromium ions in the formation. Phenolic resin cross-linker systems have reasonable gelation times and gel strengths; however, more environmentally friendly cross-linkers should be developed to meet the increasingly stringent environmental requirements. For particle gels, the addition of functional monomer(s) can improve the antitemperature performance. When the applied temperatures reach 120 °C, inorganic cross-linker systems are no longer applicable, and the gelation time of organic cross-linking polymer gel systems and gel thermal stability will decrease significantly due to fast cross-linking reactions. During this period, retarders can be used to elongate the gelation time, and gel strength enhancers (e.g., cement, silica) can also be applied to improve the gel strength at such extremely high temperatures. Most importantly, novel polymers (e.g., ter- or tetrapolymers), functional monomers, and environmentally friendly cross-linkers need to be discovered and developed for polymer gel applications. Second cross-linking systems can be applied to further enhance the strength of the particle gels in harsh conditions. On the basis of these developments, foamed gels can be well-implemented in fractures and wormholes to save the amount of injected gels.

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Section: Foamed Gelsmentioning

confidence: 99%

Polymer Gel Systems for Water Management in High-Temperature Petroleum Reservoirs: A Chemical Review

2017

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“…The advantage of this approach, according to article [17], is the reduction in the consumption of the sealing composition and, accordingly, the reduction in the workover costs, which is especially important for horizontal wells. Papers [18,19] describe foams for water shutoff in fractures in carbonate reservoirs. A heat-resistant foam gel based on phenolic resin and alkaline lignosulfonate has even been used to control the vapor-cyclic effect [20].…”

Section: Introductionmentioning

confidence: 99%

Use of Self-Generating Foam Gel Composition with Subsequent Injection of Hydrogel to Limit Gas Inflow in Horizontal Wells of Vostochno-Messoyakhskoye Field

Telin,

Karazeev,

Vezhnin

et al. 2024

Gels

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Gas inflow control in oil wells is one of the most challenging types of repair and sealing operations, the success rate of which does not exceed, as a rule, 30%. Conventional shutoff methods are often ineffective for this purpose. For instance, cement solutions cannot be injected into wells in the required volumes, while gel screens can only temporarily block the breakthrough zones, as gas easily seeps through the gel, forming new channels for gas inflow. Technology for the two-stage injection of gas-insulating gel systems for gas control in horizontal wells was developed. At the first stage, a self-generating foam gel composition (FGC), consisting of gel-forming and gas-forming compositions, was used. A foam gel structure with enhanced rheological and flow characteristics was formed over a controlled time as a result of the interaction between the gel-forming and gas-forming compounds. A PAM-based hydrogel crosslinked with an organic crosslinker was added to the FGC at the second stage of treatment. The laboratory experiments substantiated the technology of well gas and water shutoff by the sequential injection of self-generating foam gel composition and hydrogel. Field tests confirmed the correctness of the chosen concept. It is very important to clearly identify the sources of gas inflow for the success of this well intervention and take into account the well design, as well as the reservoir geological structure and characteristics. The gas shutoff operation can be properly designed for each well only by comparing all these factors. The validity of the selected technology was tested through a series of laboratory experiments. Successful laboratory tests allowed for the application of the studied technology in a field setting, where the gas shutoff agent was injected into three horizontal wells. As a result of the field application, the gas inflow was successfully isolated in two wells. However, the application of the technology failed in the third well which gave an opportunity to revisit the technology’s design and to review the sources of gas inflow. Overall, the achieved success rate of 66% demonstrated the high efficiency of the studied technology and supported its wider application in the field.

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“…The gel system formed by Mattey et al [4] by combining polymers with organic cross-linker can cope with the water production problem caused by channeling and fracture communication, but the effective time is short and the long-term water plugging cannot be achieved. He [5] et al and Wang [6] et al believe that although foam gel can achieve selective water plugging through bubble deformation, its erosion resistance is poor due to its poor stability and other problems. Although foam gel can be combined with gel to enhance its performance, the water plugging time is short and its temperature and salt tolerance is poor.…”

Section: Introductionmentioning

confidence: 99%

Study on Selective Water-blocking Agent for Temperature and Salt Resistance, Water Blocking, Air Permeability

Liu

Jing

et al. 2023

IOP Conf. Ser.: Earth Environ. Sci.

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Aiming at the high temperature and high salinity of Keshen 8 gas reservoir, the selective water plugging agent system with high temperature resistance, salt resistance and water permeability was studied. The effect of the plugging system components on the performance of plugging agent was investigated by single factor experiment, and the best formula was determined. The compressive strength of the material was stable at about 4.6 MPa, and the plugging agent had good temperature and salt resistance. Through the physical simulation experiment of fracture core flow, the plugging effect of different plugging agent injection volume on plugging agent is discussed. When the injection volume is 0.3 PV, the liquid phase plugging rate is 86.69 %, and the gas phase plugging rate is 26.18 %, which has good water resistance and gas permeability.

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Study and Application of a Gelled Foam Treatment Technology for Water Shutoff in Naturally Fractured Reservoir

Cited by 4 publications

References 10 publications

Polymer Gel Systems for Water Management in High-Temperature Petroleum Reservoirs: A Chemical Review

Polymer Gel Systems for Water Management in High-Temperature Petroleum Reservoirs: A Chemical Review

Use of Self-Generating Foam Gel Composition with Subsequent Injection of Hydrogel to Limit Gas Inflow in Horizontal Wells of Vostochno-Messoyakhskoye Field

Study on Selective Water-blocking Agent for Temperature and Salt Resistance, Water Blocking, Air Permeability

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