CG910S Accelerates Cementing and Controls Fluid Loss — A Dual-Effect Solution for Efficient Low-Temperature Cementing

In oil and gas field development, cementing is a critical operation in the drilling process. It directly impacts wellbore integrity, casing protection, and the safety and efficiency of subsequent oil and gas production. Under extreme geological conditions, especially in low-temperature environments, cementing operations often encounter serious technical challenges, such as delayed cement slurry setting, slow development of early strength, and difficulty in controlling fluid loss. These issues can prolong the operation cycle, increase costs, and potentially lead to downhole complications like inadequate mud returns, gas channeling, or wellbore collapse, all of which severely compromise cementing quality.

To address these challenges, Kelioil has developed CG910S—a fluid loss additive engineered to deliver a dual-effect solution that both accelerates cement setting and ensures stable fluid loss control. CG910S is specially formulated for formations with temperatures below 60°C. It significantly reduces the initial and final setting times as well as the thickening time of the cement slurry, enabling rapid strength development at early stages and ensuring that cementing operations are completed efficiently and effectively. Meanwhile, its exceptional fluid loss control performance improves the rheological properties and stability of the slurry, minimizes filtrate invasion into the formation, and reduces risks such as differential sticking, lost circulation, and gas migration.

Whether it is used for low-temperature shallow well cementing, rapid surface sealing of deep and ultra-deep wells, or winter construction in cold regions, CG910S consistently delivers outstanding performance. It adapts to a variety of complex well conditions and ensures reliable, efficient, and safe cementing support for oil and gas wells.

I. Challenges of Low-Temperature Cementing

Under conventional cementing conditions, the hydration reaction of cement proceeds steadily within a suitable temperature range, allowing the cement to set and gain strength as expected. However, in formations with temperatures below 60°C, the hydration rate slows dramatically. This results in prolonged initial and final setting times, causing delays in early strength development and affecting the timely anchoring and sealing of the casing.

Moreover, low temperatures often degrade the rheological performance of cement slurry. Increased viscosity and reduced pumpability make slurry placement more difficult and energy-intensive. In such scenarios, fluid loss control becomes even more critical. Excessive fluid loss from the slurry into the formation can lead to slurry instability, premature dehydration, the formation of impermeable filter cakes, or formation damage—all of which elevate the risk of wellbore instability.

Therefore, the development of a multifunctional additive that shortens setting times, enhances early strength, and efficiently controls fluid loss is essential for overcoming the challenges of low-temperature cementing.

II. Advantages of CG910S

1. Reduced Setting Times and Improved Early Strength

CG910S promotes the hydration of cement particles even under low-temperature conditions. It significantly shortens the initial and final setting times, enabling the slurry to rapidly enter the strength development stage. This minimizes downtime and optimizes construction efficiency. Test results show that the initial setting time of cement slurry with CG910S can be reduced by over 30%, while the final setting time can be shortened by up to 40%, greatly improving operational scheduling.

2. Efficient Fluid Loss Control and Improved Slurry Stability

Even at low temperatures, CG910S maintains superior control over slurry rheology. It effectively reduces fluid loss, allowing the slurry to maintain good flowability and stability within the wellbore. This minimizes filtrate invasion into the formation, reducing risks such as formation breakdown or lost circulation, and ensuring consistent slurry performance during placement and setting.

3. Wide Adaptability to Complex Geological Conditions

CG910S demonstrates excellent versatility across diverse geological and operational scenarios—from shallow wells on high plateaus in western regions, to cold-climate cementing in northern winter environments, to rapid surface casing cementing in southern deep or humid formations. It is compatible with various cement types and other additives, making it suitable for a broad range of project requirements.

4. Field-Friendly Formulation for Convenient Application

Supplied in powder form, CG910S is easy to store, transport, and handle on-site. It offers flexible dosage adjustments based on formation temperature and well depth, allowing precise formulation and operational control. This user-friendly approach enhances both the safety and efficiency of cementing operations.

III. The Action of CG910S

As a high-performance fluid loss additive, CG910S not only reduces the filtrate volume of cement slurry but also enhances the hydration process, improves slurry structure, and stabilizes the cement system—particularly under low-temperature conditions. Its multifunctional effects are achieved through the following mechanisms:

1. Formation of Multifunctional Polymer Network Structures

CG910S molecules contain numerous hydrophilic and adsorption-active groups that adhere to the surfaces of cement particles at multiple points. Within the slurry, they form a cross-linked polymer network, increasing the structural viscosity and creating a uniform 3D matrix. This network effectively restricts water migration into the formation, reduces filtrate generation, and enhances overall slurry stability.

2. Facilitation of the Hydration Reaction

At low temperatures, the hydration rate of cement declines significantly. Functional groups in CG910S assist in activating reactive sites on the surface of cement particles, thereby accelerating the formation of hydration products and speeding up the setting process. Its slow-release structure also ensures a balanced hydration rate, avoiding premature localized setting and preserving slurry pumpability.

3. Control of Free Water and Inhibition of Slurry Separation

Cement slurries are prone to segregation and settling during static conditions, especially when using high-density formulations in cold environments. CG910S’s water-binding capability reduces free water content and enhances suspension stability, keeping all components evenly distributed and minimizing problems such as channeling or inconsistent slurry placement during pumping.

As drilling operations increasingly expand into extreme and complex environments—such as frigid climates, high-altitude regions, deep and ultra-deep wells—the demand for specialized cementing materials is rising sharply. CG910S, a dual-function cement additive that combines rapid setting promotion with reliable fluid loss control, stands out as the go-to solution for low-temperature cementing.

At Kelioil, we remain committed to a philosophy of technology-driven innovation and application-oriented development. Our future roadmap includes continuous R&D investment in advanced cementing materials to deliver even more targeted, high-performance solutions. With CG910S, we are not only offering a product—we are providing a new perspective on wellbore safety, efficiency, and cementing excellence.