Overview
Degradable temporary plugging fibers are engineered polymer fibers designed to temporarily block fractures or pores in subterranean formations during oil and gas operations. Unlike conventional plugging materials, these fibers degrade predictably through hydrolysis or enzymatic processes, eliminating the need for post-operation removal. Developed as an environmentally conscious alternative, they significantly reduce formation damage and intervention costs. These fibers are typically manufactured from biodegradable polymers like polylactic acid (PLA) or polyglycolic acid (PGA), with additives to control degradation rates. The technology emerged in the early 2000s as operators sought more efficient stimulation methods, with China becoming a major producer and innovator in this niche field.
Physical and Chemical Properties
The fibers exhibit a tensile strength of 200-500 MPa, sufficient to withstand downhole pressures while maintaining structural integrity during the plugging phase. Fiber diameters range from 10-100 microns, with lengths adjustable between 2-20mm to match fracture dimensions. Surface treatments are often applied to enhance dispersion in fracturing fluids. Degradation begins when exposed to downhole temperatures (typically 60-120°C) and formation fluids, with complete breakdown occurring within 24-240 hours depending on formulation. The degradation products are primarily non-toxic organic acids that naturally neutralize in the formation. Thermal stability varies by composition, with high-grade fibers maintaining performance up to 150°C.
Main Applications
Primary use is in multistage hydraulic fracturing operations, where fibers create temporary barriers between stages. They're pumped with fracturing fluid to bridge near-wellbore fractures, allowing pressure buildup for subsequent stages. After serving their purpose, they degrade to permit hydrocarbon flow. Secondary applications include controlling lost circulation in drilling operations and temporary zonal isolation during well workovers. Some formulations are used in geothermal wells where conventional materials might impair heat exchange. The technology is particularly valuable in unconventional reservoirs like shale formations, where it improves stimulation efficiency by 15-30% compared to conventional methods.
Safety and Storage
While the materials are generally non-hazardous, fiber dust may cause mechanical irritation to eyes and respiratory systems. Handling requires basic PPE including goggles and NIOSH-approved dust masks. Storage life is typically 12-24 months in original sealed packaging under recommended conditions. Degraded products in downhole environments pose minimal environmental risk, but surface spills should be contained to prevent unnecessary soil exposure. Compatibility testing with formation fluids is recommended to verify degradation rates and byproduct behavior. Transportation follows general chemical product regulations, with no special hazardous material classifications.
B2B Procurement Guide
Key specifications to define include: degradation time window (e.g., 48-72 hours at 90°C), maximum operating temperature, fiber length distribution, and preferred polymer base. Bulk purchases (500kg+) typically secure 8-15% discounts, with MOQs often starting at 50kg for custom formulations. Leading manufacturers offer technical support for product selection and field application design. Sample testing is advisable to verify performance under simulated downhole conditions. Payment terms commonly include 30% deposit with balance due before shipment, with Incoterms typically FOB Chinese ports. Quality certifications to look for include ISO 9001 and API compliance statements.
Related Manufacturers
- 主营：抗车辙剂、沥青添加剂、沥青道路混合料、木质素纤维、聚丙烯纤维、聚酯纤维、玄武岩纤维、水溶性纤维、酸可溶纤维、水分散纤维、高模量剂、沥青再生剂、阻燃剂