Hongsheng Latex-Based Anti-Channeling and Anti-Corrosion Cement Slurry System—Fortifying the “Lifeline” of Gas Wells

[Editor’s Note] Sichuan Hongsheng Petroleum Engineering Technology Services Co., Ltd. takes technology as its driving force and is committed to providing customers with comprehensive solutions to tackle complex cementing challenges. Upholding the principle of innovation-driven development, the company has achieved groundbreaking innovations through long-term dedication and accumulation in the research and development of latex-based anti-channeling and anti-corrosion cement slurry systems. This system seamlessly integrates anti-channeling, toughening, and anti-corrosion functions, significantly enhancing the long-term sealing performance of wellbores and offering a new paradigm for cementing complex gas wells, thereby further improving cementing quality.

In high-pressure gas wells, deep wells, and wells containing acidic gases (such as H ₂ S 、 CO 2) In complex well cementing operations, such as those involving wells and shale gas, gas migration and corrosion pose critical threats to wellbore integrity and significantly impact production safety and well life. The high-performance latex-based anti-migration and anti-corrosion cement slurry system independently developed by Sichuan Hongsheng integrates exceptional anti-migration performance, strong impact resistance, and excellent corrosion resistance. It has become an innovative technology that addresses industry pain points and ensures the safety of gas wells throughout their entire lifecycle, and has been successfully applied in several key blocks with remarkable results.

1. Core advantages of the Hongsheng latex-based anti-channeling and anti-corrosion cement slurry system:

1.1 Exceptional Resistance to Gas Migration: The system contains special latex particles that intelligently migrate and concentrate in the critical hydration stage of cement, accumulating in pores and potential micro-gaps to form a dense, low-permeability, flexible, self-healing barrier. This barrier effectively seals gas migration pathways, significantly reducing the incidence of gas migration.

1.2 High Toughness and Impact Resistance: Imparts exceptional elasticity and toughness to hardened cement stone, significantly enhancing its ability to withstand impacts caused by perforations, fracturing, and fluctuations in formation pressure. This effectively inhibits the formation of microannular gaps, ensuring long-term reliable zonal isolation.

1.3 Excellent Engineering Adaptability: Enhances the control of cement slurry filtration and its rheological properties, thereby improving displacement efficiency and ensuring the overall quality of the annular cement sheath. At the same time, it strengthens the bonding strength between the cement stone and the casing as well as the formation, thus enhancing the reliability of interface sealing.

1.4 Excellent corrosion resistance: The dense latex film formed effectively blocks corrosive media (such as formation water, H ₂ S 、 CO 2) Into the cement stone and casing - Penetration and erosion at the cement interface significantly enhance the corrosion resistance of the cement annulus, reduce the risk of casing damage and interlayer sealing failure caused by corrosion, and extend the service life of the wellbore.

1.5 Long-term Protection: The comprehensively engineered “strong and corrosion-resistant cement ring” can withstand the combined challenges of subsequent production enhancement operations, pressure fluctuations during production, and corrosive environments, laying a solid foundation for high, stable, safe, and long-lasting gas well production.

2. The Hongsheng latex-based anti-channeling and anti-corrosion cement slurry system has demonstrated remarkable application effectiveness.

This system has been successfully applied to cementing operations in numerous high-pressure, high-sulfur-content gas wells with complex operating conditions across China, including those in Northwest China, Puyang, Weiyuan, Changning, Fuling, Nanchuan, Yongchuan, Puguang, Yuanba, and Pengzhou Hai Xiang. 400 Yu Jingci, maximum application temperature: 190 ℃; Maximum application density: 2.82g/cm³ ; Maximum applicable salinity: 18% Practice has shown:

2.1 The qualified rate of cementing quality and the high-quality bonding rate at the interface have significantly improved.

2.2 Effectively ensured the smooth implementation of subsequent large-scale fracturing and other production-enhancing operations.

2.3 Significantly reduces the incidence of gas migration as well as the risks of workover operations and production losses caused by corrosion and packer failure, thereby creating long-term economic benefits for customers.

Writer: Wang Jian