GX-GG-2B1-2A1a-6.35 ( 1/4”), 6.35mm, 2 SM+2 MM, 316L/A825 Armor Optical Fiber
Applicable Well Types：
1.Conventional Oil & Gas Wells
Adaptable Well Types: Medium deep vertical wells (depth ≤ 4000m), medium deviation directional wells (build up section ≤ 60°), medium shallow cased wells (φ89mm/φ114mm casing), medium shallow open hole wells.
Typical Applications:Medium deep oil & gas exploration wells, dynamic monitoring of conventional production wells, cased well completion monitoring, open hole exploration logging.
2. Unconventional Oil & Gas Wells
Adaptable Well Types:Medium shallow coalbed methane (CBM) wells (depth ≤ 2500m), shale gas long radius horizontal wells (horizontal section ≤ 1000m), tight oil & gas development wells.
Typical Applications: Production monitoring of CBM development wells, shale gas horizontal well fracturing monitoring, tight reservoir dynamic monitoring, permanent monitoring of unconventional wells.
3. Other Exploration & Engineering Wells
Adaptable Well Types: Medium shallow geothermal wells (bottomhole temperature ≤ 150℃, depth ≤ 2500m), hydrogeological exploration wells, underground coal mine monitoring wells, medium shallow water injection wells.
Typical Applications:Medium temperature geothermal resource monitoring, groundwater hydrological data collection, coal mine underground gas monitoring, water injection profile monitoring.
Strictly Inapplicable Scenarios
1.Ultra deep wells (depth > 4000m): 10kN breaking strength cannot support total tension of cable weight + logging tool weight, high risk of cable breakage.
2.High deviation wells (> 60°) / short radius horizontal wells (build up rate > 12°/100ft): Insufficient torsion and friction resistance; minimum bending diameter (800mm) cannot match high build trajectories, easily causing fiber breakage and signal failure.
3.Ultra high temperature wells (bottomhole temperature > 150℃): Exceeds rated temperature, causing FEP insulation aging, increased fiber attenuation, and monitoring failure.
4.Severe corrosive wells (high H₂S/CO₂ concentration): Standard 316L/A825 stainless steel cannot resist long term severe corrosion, leading to armor rust and fiber damage.
5.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), 316L/A825 stainless steel fiber unit tube |
DTS/DAS signal transmission, bottomhole temperature ≤150℃, no heavy mechanical load, fiber reserve length >3‰ |
Conventional oil & gas wells, shale gas wells, coalbed methane wells |
|
Temperature Resistance |
Rated temperature 150℃ (302℉) |
Medium-temperature working conditions, bottomhole temperature ≤150℃, no ultra-high temperature (>150℃) environment |
Medium-deep conventional oil & gas wells, shallow geothermal wells, coal mine underground monitoring wells |
|
Protection & Outer Diameter |
Outer diameter 6.35mm±0.10mm, 316L/A825 stainless steel outer tube + FEP encapsulation, corrosion-resistant |
Wellbore diameter ≥80mm, moderate wellbore wear, corrosive formation fluid (H₂S/CO₂/Cl⁻), rated pressure ≤100MPa |
Medium-deep cased wells, open-hole wells, corrosive oil & gas wells |
|
Mechanical Performance |
Breaking strength 10kN, maximum working tension 5kN, minimum bending diameter 800mm, good flexibility and torsion resistance |
Well depth ≤4000m, build-up section ≤60°, no sudden dogleg severity, horizontal section ≤1000m (long radius) |
Medium-deep vertical wells, medium-deviation directional wells, long-radius horizontal wells |
Send Inquiry