Product Details

Composite Lost Circulation Material

1. Product Overview

Composite Lost Circulation Material is a high-efficiency plugging agent compounded with nut shell, mica, vermiculite and other inorganic raw materials. With multi-particle gradation and fiber structure, it can quickly form a dense and impermeable sealing layer on formation fractures and pores. It features fast plugging effect, long-lasting performance and wide adaptability. Widely applied in water-based drilling fluids for lost circulation treatment in complex formations, it also provides effective reservoir protection.

2. Appearance & Basic Properties

3. Core Technical Parameters

4. Core Functions

4.1 Fast Plugging for Pores & Fractures

The graded particles and fibers can rapidly block pores and micro-fractures, forming a firm sealing layer in a short time to stop fluid loss effectively.

4.2 Reservoir Protection

It builds an impermeable barrier on the formation surface to prevent invasion of liquid and solid phases. The sealing layer can be easily removed by perforation and flowback without causing permanent reservoir damage.

4.3 Fluid Loss Control & Stable Mud Performance

It effectively reduces filtration loss of drilling fluids, with excellent high temperature resistance. It will not change the rheological properties of mud during application.

4.4 Anti-Pollution & Eco-Friendliness

Chemically stable and resistant to electrolyte contamination. The product is non-toxic and harmless, fully compliant with environmental requirements for field operations.

5. Product Application

· Conduct while-drilling plugging by direct addition into water-based drilling fluid circulation system

· Treat lost circulation of pores, fractures and vugs in various complex formations

· Used alone or combined with other bridging materials for severe lost circulation zones

· Replace or optimize conventional lost circulation materials to improve plugging efficiency

6. Product Advantages

✅ Quick EffectObvious plugging effect within 30 minutes after addition, saving operation time and cost.

✅ Durable PerformanceLong-term stable plugging effect with low risk of repeated leakage.

✅ Wide Application RangeSuitable for different sizes of fractures, vugs and various complex lost circulation formations.

✅ Easy to UseNo special construction process required, compatible with conventional drilling fluid systems.

✅ Good CompatibilityNo adverse impact on drilling fluid properties, safe and reliable for long-term use.

7. Packaging Specification

· Standard: 25 kg per bag, available in woven bags, paper-plastic composite bags or bulk bags.

· Custom packaging is acceptable as per customer demands.

8. Storage & Transportation

Store in a cool, dry and ventilated warehouse. Keep away from fire, heat sources and direct sunlight to guarantee product quality.

9. Disclaimer & Technical Support

All specifications and descriptions herein are for reference only. Please select and use the product according to actual working conditions. Customized solutions and technical support are available on request.

Application Cases of Modified Plant Fiber Lost Circulation Material for Drilling Fluids

1. While-drilling Plugging Case for Rotary Steering Precision Drilling

Case Background: Rotary steering drilling tools feature precise internal flow channels and dense screen structures. Conventional rigid granular plugging materials are prone to blocking the tool screen, causing tool failure and drilling interruption. Meanwhile, micro-fractures and permeable leakage are commonly encountered during directional and horizontal well drilling, requiring plugging materials with both excellent passing performance and stable plugging capacity.

Application Formula & Dosage: Modified plant fiber lost circulation material was added at 2.0%–3.0% to conventional water-based drilling fluid systems. The flexible fiber structure ensures smooth passing through rotary steering tools without blocking precision equipment.

Application Effect: The modified flexible plant fibers form a dense three-dimensional network bridging structure in formation pores and micro-fractures. Under working conditions of 150℃ and 6 MPa pressure, the 30-minute cumulative leakage is only 4 mL, achieving efficient micro-leakage control. The product does not affect the normal operation of rotary steering tools and MWD/LWD logging instruments, ensuring continuous and stable drilling of high-precision directional wells and horizontal wells.

2. Micro-leakage Control Case for Ultra-long Horizontal Sections in Changqing Shale Oil Wells

Case Background: Shale oil horizontal wells in Changqing Oilfield have ultra-long open-hole sections, densely developed micro-nano fracture groups, low formation fracture pressure, and persistent low-rate percolation and micro-leakage. Conventional rigid plugging materials have poor flexibility and filling performance, failing to fit irregular micro-fractures, resulting in long-term ineffective leakage and difficulty in wellbore pressure build-up.

Application Method & Dosage: On the basis of shale oil water-based drilling fluid system, 1.5%–2.5% modified plant fiber plugging agent was added. The flexible fiber body can adaptively deform and fill micro-fractures of different shapes, forming a tight plugging system.

Application Effect: The product features high flexibility, strong adhesion and excellent deformation fitting performance. It can fully fill and seal micro-nano fracture gaps, effectively control long-term micro-percolation loss, and significantly improve wellbore pressure-bearing capacity. The drilling fluid rheology remains stable throughout the process, with no adverse impact on cuttings carrying and wellbore cleaning, ensuring safe and efficient drilling of ultra-long horizontal sections.

3.  Flexible Plugging and Wellbore Stabilization Case for Fractured Formations in Xinjiang Oilfield

Case Background: The fractured and broken formations in Xinjiang Oilfield are loose in structure with irregular fracture openings, prone to alternating leakage and collapse. Conventional rigid plugging materials have poor fitting performance, low plugging layer compactness, and are easy to be washed out, resulting in poor long-term wellbore stability.

Application Dosage: 2.0%–3.0% modified plant fiber lost circulation material was applied in brine and conventional water-based drilling fluid systems, used for simultaneous plugging and wellbore stabilization.

Application Effect: Modified plant fibers form a flexible network skeleton inside fractures, which is closely fitted with formation cracks without rigid gap. The plugging layer features high toughness and strong erosion resistance, effectively preventing leakage recurrence. Meanwhile, the fiber network optimizes mud cake quality, inhibits shale hydration and spalling, realizes dual effects of plugging anti-leakage and wellbore stabilization, and significantly reduces downhole complex risks in broken formations.

4.  Environmental-friendly While-drilling Plugging Case for Offshore Oilfields

Case Background: Offshore drilling operations have strict environmental protection requirements, limiting the use of chemically synthetic and high-toxic plugging materials. Shallow unconsolidated formations and fractured reservoirs in offshore blocks are prone to frequent slight leakage, requiring low-toxic, pollution-free and high-efficiency plugging materials.

Application Method & Effect: The product is made of natural modified plant fiber, non-toxic and environmentally friendly, meeting offshore discharge standards. Applied at a dosage of 1.5%–2.5%, it can continuously plug permeable and micro-fracture leakage during drilling without stopping operation. It has good compatibility with seawater-based drilling fluid systems, does not damage reservoir permeability, and achieves green and efficient leakage control for offshore wells.

5. Low-damage Plugging Case for Low-pressure Formations in Sulige Gas Field

Case Background: Low-pressure and low-permeability gas reservoirs in Sulige Gas Field have loose formation cementation, developed pore permeability, and frequent slight leakage during drilling. Conventional heavy plugging materials are prone to residue accumulation and pore blockage, causing permanent reservoir damage and affecting gas well productivity.

Application Method & Effect: The conventional dosage is 2.0%–3.0%. The modified plant fiber has low density, good dispersion and strong reversible plugging performance. It can quickly form a network plugging structure to control micro-leakage. After well completion, the fiber structure is easy to decompose and reverse permeate, with no residual blockage. It features low reservoir damage and high permeability recovery rate, which is very suitable for low-pressure gas reservoir protection and efficient drilling.