China Suppliers Factory GX-GG-2B1-2A1a-F 11×11 mm 316L/A825 Optical Fiber for Well Logging and Monitoring
Applicable Well Types
Adaptable Well Types
Medium-deep vertical wells (depth ≤ 4000m), medium-deviation directional wells (≤ 60°), medium-deep cased wells, medium-deep open-hole wells, medium-temperature high-temperature exploration wells.
Typical Applications
Medium-deep oil & gas exploration wells, production dynamic monitoring, cased well completion monitoring, open-hole exploration logging, medium-temperature high-temperature well monitoring.
Adaptable Well Types
Shale gas long-radius horizontal wells (horizontal section ≤ 1000m), medium-deep coalbed methane (CBM) wells, medium-deep tight oil & gas wells, medium-temperature high-temperature unconventional wells.
Typical Applications
Shale gas horizontal well fracturing monitoring, CBM well production monitoring, tight reservoir dynamic monitoring, permanent downhole monitoring in medium-temperature high-temperature zones.
Adaptable Well Types
Medium-deep medium-temperature high-temperature geothermal wells (≤ 200℃), hydrogeological exploration wells, underground coal mine monitoring wells, medium-deep water injection wells.
Typical Applications
Medium-temperature high-temperature geothermal resource monitoring, groundwater hydrological data collection, coal mine underground gas monitoring, water injection profile monitoring.
Strictly Inapplicable Scenarios
Wells deeper than 4000m: 10kN breaking strength cannot support total tension of cable weight + logging tool weight, high risk of cable breakage.
High-deviation wells (> 60°) / short-radius horizontal wells: Insufficient torsion and friction resistance; minimum bending diameter cannot match high-build trajectories, easily causing fiber breakage and signal failure.
Ultra-high temperature wells (> 200℃): Exceeds rated temperature, causing insulation aging, increased fiber attenuation, and monitoring failure.
Severe corrosive wells (high H₂S/CO₂ concentration): Standard stainless steel cannot resist long-term severe corrosion, leading to armor rust and fiber damage.
Ultra-high pressure wells (pressure > 140MPa): Exceeds rated pressure resistance, risking seal failure, structural damage, and safety hazards.
Selection Reference
| Parameter | Specification | Applicable Well Condition | Typical Well Type |
|---|---|---|---|
| Fiber Configuration | 2 single-mode (B1) + 2 multi-mode (A1a) fibers, 11×11mm square cross-section, stainless steel fiber unit tube | DTS/DAS optical signal transmission, bottomhole temperature ≤200℃, fiber reserve length >3‰, suitable for medium-deep, medium-high temperature downhole environment (≤4000m), good stability in small wellbores | Medium-deep conventional oil & gas wells (≤4000m), shale gas long-radius horizontal wells, medium-deep coalbed methane wells |
| Temperature Resistance | Rated temperature 200℃ (392℉), high-temperature resistant insulation layer, stable performance under 200℃ long-term operation, compatible with square-section structure | Medium-high temperature downhole environment, bottomhole temperature ≤200℃, no ultra-high temperature (>200℃) environment, medium-deep well (≤4000m) long-term monitoring | Medium-deep oil & gas wells (≤4000m), medium-high temperature geothermal wells (≤200℃), medium-temperature unconventional oil & gas wells |
| Protection & Cross-Section | 11×11mm square cross-section (stable, anti-tangling), stainless steel outer tube, FEP encapsulation, excellent wear resistance, corrosion resistance and pressure resistance | Wellbore diameter ≥90mm, small wellbore space, moderate wellbore wear, corrosive formation fluid (H₂S/CO₂/Cl⁻), rated pressure ≤140MPa, medium-deep downhole environment (≤4000m) | Medium-deep cased wells (≤4000m), medium-deep open-hole wells, small-diameter exploration wells, medium-high temperature geothermal wells |
| Mechanical Performance | Breaking strength 10kN, maximum working tension 5kN (1:2 safety factor), excellent stability (square cross-section advantage), good flexibility and anti-wear performance, fully medium-deep well (≤4000m) tension requirements | Well depth ≤4000m, build-up section ≤60°, horizontal section ≤1000m (long radius), no sudden dogleg severity, medium downhole friction and tension conditions | Medium-deep vertical wells (≤4000m), medium-deviation directional wells, shale gas long-radius horizontal wells, medium-deep coalbed methane development wells |