Product Details

High Temperature Resistant Starch

1. Product Overview 

High Temperature Resistant Starch (alias: CMS-K Modified Starch) is an eco-friendly, modified starch-based fluid loss control agent. Derived from natural starch via chemical modification, it exhibits excellent thermal stability, salt tolerance and calcium resistance. Widely used in oil drilling fluids, it effectively reduces fluid loss, enhances mud stability, minimizes formation damage, and meets strict environmental protection requirements.

2. Appearance & Technical Specifications 

Core Technical Parameters 

3. Core Functions 

3.1 High Temperature Resistance 

The starch maintains stable performance under high temperatures without thermal degradation, enabling effective fluid loss control in high-temperature formations to ensure uninterrupted drilling operations.

3.2 Salt Resistance 

Conventional drilling fluids often suffer performance degradation due to salt contamination. In contrast, this starch demonstrates excellent salt tolerance, maintaining reliable fluid-loss control even in high-salinity environments.

3.3 Calcium Resistance 

Calcium ions in drilling fluids often react with other components, leading to performance deterioration. This starch offers strong resistance to calcium ions, inhibiting their activity in calcium-rich formations and maintaining fluid stability.

3.4 Environmental Protection 

Manufactured from natural starch through specialized processing, it exhibits excellent environmental compatibility, fully complying with ecological protection requirements.

4. Product Application 

      Widely used as a fluid loss control agent in oil drilling fluids, with key applications including:

· Reducing fluid loss and minimizing formation damage

· Enhancing fluid stability and reusability in high-temperature, high-salt, and high-calcium formations

· Resisting salt and calcium contamination to maintain mud performance

· Providing an eco-friendly solution for drilling operations

5. Product Advantages 

✅ Rapid Polymer Formation & Viscosity EnhancementForms polymers quickly in aqueous solutions, enhancing mud viscosity and consistency.

✅ Eco-Compliant & Non-ToxicEnvironmentally friendly, non-toxic and zero-pollution, meeting strict environmental requirements.

✅ High Thermal StabilityMaintains performance integrity at high temperatures without degradation.

✅ Superior Salt Tolerance & CompatibilityAdapts to diverse mud types, including high-salinity and high-calcium systems.

6. Packaging Specification

· Standard: 25 kg/bag in triple-layer composite kraft paper bags.

· Customizable packaging specifications are available according to client requirements.

7. Storage & Transportation 

Store in a dry, cool, and well-ventilated warehouse during storage and transportation. Keep away from fire and heat sources, and avoid direct sunlight to maintain product quality and performance.

8. Disclaimer & Technical Support 

All specifications and descriptions in this document are for reference only. The product shall be used in accordance with the customer’s actual working conditions and technical requirements. Customized formulations and solutions are available upon request.

Application Cases of High-temperature Resistant Starch for Drilling Fluids

1.Ultra-deep Well High-temperature Filtration Control Case above 180℃

Case Background: Ultra-deep wells in central and western oilfields feature ultra-high bottom hole temperature (170–190℃), long hot rolling time and severe thermal degradation of conventional treatment agents. Common starch and polymer filtrate reducers are prone to molecular chain fracture and failure at high temperature, resulting in sharp increase of HTHP filtration, deteriorated mud cake quality, frequent wellbore hydration and collapse, seriously restricting safe drilling of ultra-deep complex wells.

Application Formula & Dosage: On the basis of high-temperature water-based drilling fluid system, 1.5%–2.5% high-temperature resistant modified starch was added independently. It is compounded with a small amount of high-temperature stabilizer to build a high-temperature stable filtration control system.

Application Effect: The cross-linked high-temperature resistant starch has stable molecular structure and strong thermal stability, which can effectively avoid high-temperature degradation and failure. After hot rolling at 185℃, the drilling fluid rheology remains stable, the HTHP filtration loss is reduced by more than 50%, and the filter cake is thin, dense and smooth. It effectively inhibits formation water invasion and wellbore instability, ensures full-cycle stable drilling of ultra-deep high-temperature wells, and solves the industry problem of easy failure of organic treatment agents under ultra-high temperature conditions.

2.Drilling Fluid Optimization Case for High-temperature Appraisal Wells in Yuanba Block, Southwest Oilfield

Case Background: The deep formation of Yuanba Block has a formation temperature of 140–160℃, developed micro-fractures and active formation water. Conventional filtrate reducers tend to cause excessive viscosity increase and poor filtration control effect at medium and high temperature, resulting in unstable drilling fluid performance, increased downhole circulation resistance, and hidden dangers of wellbore leakage and collapse.

Application Method & Dosage: High-temperature resistant starch was applied at 1.2%–2.0% in the polymer high-temperature drilling fluid system. It is used to replace part of sulfonated polymer materials to optimize rheological and filtration performance.

Application Effect: The product features temperature resistance, viscosity stabilization and excellent filtration reduction performance. It can stably control system viscosity and shear force without excessive thickening, significantly reduce medium and high temperature filtration loss, and improve mud cake compactness. The overall drilling fluid system has strong anti-interference ability, stable performance throughout the drilling process, no downhole complex accidents, and effectively improves the drilling efficiency of high-temperature appraisal wells.

3. Offshore Environment-friendly Non-fluorescent Low-damage Drilling Case

Case Background: Offshore drilling operations have strict requirements on environmental protection and logging compatibility. Traditional sulfonated high-temperature agents have high fluorescence and toxicity, which interfere with logging interpretation and fail to meet offshore discharge standards. High-temperature reservoir intervals are prone to filtrate invasion and reservoir permeability damage, affecting later oil and gas evaluation.

Application Dosage: 1.5%–2.0% non-fluorescent high-temperature resistant starch was added to the offshore environmental-friendly water-based drilling fluid system as the main filtrate reducer.

Application Effect: The product is natural in source, non-toxic and non-fluorescent, fully compliant with offshore environmental protection standards, and does not interfere with logging and reservoir interpretation. It forms a dense protective film on the wellbore at high temperature to reduce filtrate invasion, effectively reduce reservoir damage, and maintain high core permeability recovery rate. It realizes high-temperature, environmental-friendly and low-damage integrated drilling construction for offshore wells.

4. Anti-pollution System Stabilization Case for High-salt & High-temperature Formations

Case Background: High-mineralization salt-gypsum formations have strong ion interference and high formation temperature. Ordinary starch materials are extremely sensitive to salt contamination, prone to gel failure and sharp increase of filtration loss, resulting in system instability, wellbore shrinkage and frequent leakage, which cannot adapt to long-cycle high-temperature and high-salt drilling.

Application Method & Effect: High-temperature and salt-resistant modified starch was applied at 1.8%–2.5% in saturated brine drilling fluid systems. It has excellent high-temperature and anti-salt stability, no gel breaking or failure under high temperature and high salt compound pollution. It can stably control drilling fluid filtration and rheological parameters, maintain excellent mud cake quality, effectively resist formation salt pollution, and ensure long-term stable drilling in high-temperature and high-salt complex formations.

5. Wellbore Stabilization Case for Long Open-hole Sections of Tight Oil & Gas Horizontal Wells

Case Background: Tight oil and gas horizontal wells have long open-hole soaking time, high bottom hole temperature, and micro-fracture development. Long-term high-temperature immersion easily causes hydration spalling of shale, increased wellbore roughness, high tripping torque and differential pressure stuck pipe risks, which affect the smooth construction of long horizontal sections.

Application Method & Effect: The conventional dosage is 1.5%–2.0%. The high-temperature resistant starch has good high-temperature film-forming and adsorption properties. It can adsorb on shale surfaces to form a dense isolation film, inhibit hydration and dispersion of clay minerals, and optimize filter cake morphology to be thin and smooth. It effectively reduces downhole friction and torque, controls wellbore enlargement rate, eliminates stuck pipe risks, and ensures safe and efficient drilling of long horizontal sections of tight reservoirs.