China Suppliers Factory GX-W1-2B1-2A1a-GF 9.58mm Optical Fiber, 2 SM + 2 MM for DTS, DAS, DVS, and Data Transmission
Applicable Well Types
1 Conventional Oil & Gas Wells
Adaptable Well Types: Ultra-deep vertical wells (depth ≤ 8000m), medium-to-high deviation directional wells (≤ 65°), ultra-deep cased wells, ultra-deep open-hole wells, high-friction and high-abrasion deep wells.
Typical Applications: Ultra-deep oil and gas exploration, ultra-deep well production dynamic monitoring, high-temperature deep well logging, high-friction ultra-deep well operation, permanent downhole monitoring.
2 Unconventional Oil & Gas Wells
Adaptable Well Types: Extra-long radius horizontal wells (horizontal section ≤ 2500m), deep shale gas wells, deep coalbed methane wells, deep tight oil & gas wells, high-temperature unconventional wells.
Typical Applications: Deep shale gas horizontal well fracturing monitoring, deep CBM well production monitoring, tight reservoir dynamic monitoring, high-temperature unconventional well monitoring.
3 Other Exploration & Engineering Wells
Adaptable Well Types: Medium-high temperature geothermal wells (≤ 200℃), ultra-deep hydrogeological wells, deep engineering monitoring wells, deep water injection wells, coal mine underground deep monitoring wells.
Typical Applications: Medium-high temperature geothermal resource monitoring, ultra-deep hydrological detection, deep well gas monitoring in coal mines, water injection profile monitoring, deep engineering well monitoring.
Strictly Inapplicable Scenarios
Wells deeper than 8000m — exceeds the mechanical safety margin.
Ultra-high temperature wells (> 200℃) — causes insulation aging and performance failure.
Short-radius horizontal wells and sharp dogleg wells — not suitable for extreme bending.
Extremely severe H₂S/CO₂ corrosion environment — without special anti-corrosion treatment.
Ultra-high pressure environment — exceeding the rated pressure grade.
Selection Reference
| Parameter | Specification | Applicable Well Condition | Typical Well Type |
| Fiber & Power Configuration | 2 single-mode (B1) + 2 multi-mode (A1a) fibers, photoelectric composite structure (integrated optical signal transmission + downhole tool power supply), GF standard, high-strength armored design | Simultaneous downhole power supply & DTS/DAS optical signal transmission, bottomhole temperature ≤200℃, fiber reserve length >3‰, suitable for high-friction, high-tension ultra-deep downhole environment (≤8000m) | Ultra-deep conventional oil & gas wells (≤8000m), deep shale gas horizontal wells, deep coalbed methane wells |
| Temperature Resistance | Rated temperature 200℃ (392℉), PI (polyimide) insulation layer, high-temperature resistance, no aging under 200℃ long-term operation, compatible with photoelectric composite structure | Medium-high temperature downhole environment, bottomhole temperature ≤200℃, no ultra-high temperature (>200℃) environment, ultra-deep well (≤8000m) long-term photoelectric dual transmission | Ultra-deep oil & gas wells (≤8000m), high-temperature geothermal wells (≤200℃), high-temperature deep unconventional oil & gas wells |
| Protection & Outer Diameter | Outer diameter 9.58mm±0.10mm, high-strength armored structure, PI encapsulation + corrosion-resistant material, excellent wear resistance, corrosion resistance and pressure resistance, suitable for harsh ultra-deep downhole environments | Wellbore diameter ≥110mm, high friction, high wellbore wear, corrosive formation fluid (H₂S/CO₂/Cl⁻), rated pressure ≤140MPa, ultra-deep downhole environment (≤8000m) | Ultra-deep cased wells (≤8000m), deep open-hole wells, high-friction oil & gas wells, deep coal mine underground monitoring wells |
| Mechanical Performance | Breaking strength 74kN, maximum working tension 37kN (1:2 safety factor), minimum bending diameter 1000mm, excellent flexibility, torsion resistance and anti-wear performance, fully adapted for ultra-deep well (≤8000m) high-tension requirements | Well depth ≤8000m, build-up section ≤65°, horizontal section ≤2500m (long radius), no sudden dogleg severity, high downhole friction and high-tension conditions | Ultra-deep vertical wells (≤8000m), medium-to-high deviation directional wells, deep shale gas long-radius horizontal wells, deep coalbed methane development wells |
Frequently Asked Questions
What is the maximum depth this cable is rated for, and what happens if that limit is exceeded?
This photoelectric composite cable is rated for a maximum depth of 8000m. Exceeding this limit surpasses the mechanical safety margin, which can result in cable failure, loss of downhole tools, and potential wellbore damage. It is strictly not recommended for applications deeper than 8000m.
Can this cable be used in high-temperature geothermal wells?
Yes. The cable is suitable for medium-high temperature geothermal wells with downhole temperatures up to 200℃ (392℉). The PI (polyimide) insulation layer ensures no aging or performance degradation under long-term 200℃ operation. However, it must not be deployed in environments exceeding 200℃, as this will cause insulation aging and system failure.
Is this cable compatible with both DTS and DAS monitoring systems?
Yes. The cable integrates 2 single-mode (B1) and 2 multi-mode (A1a) optical fibers within a photoelectric composite structure. This design supports simultaneous DTS (Distributed Temperature Sensing) and DAS (Distributed Acoustic Sensing) optical signal transmission, as well as downhole tool power supply — all in a single cable run.
What corrosive environments is this cable designed to withstand?
The cable features PI encapsulation combined with corrosion-resistant armoring materials, providing protection against corrosive formation fluids including H₂S, CO₂, and Cl⁻ environments up to rated conditions. However, in extremely severe H₂S/CO₂ corrosion environments without additional special anti-corrosion treatment, deployment is not recommended.
Can this cable be deployed in horizontal shale gas wells?
Yes, the cable is designed for extra-long radius horizontal wells with horizontal sections up to 2500m. With a minimum bending diameter of 1000mm and a breaking strength of 74kN (working tension 37kN), it is well-suited for deep shale gas horizontal well fracturing monitoring and production monitoring. It is not suitable for short-radius or sharp dogleg well sections.
What wellbore diameter is required for safe deployment of this cable?
The cable has an outer diameter of 9.58mm (±0.10mm) and requires a minimum wellbore diameter of ≥110mm for safe deployment. The high-strength armored design ensures durability in high-friction, high-abrasion wellbore environments, making it applicable to both ultra-deep cased wells and open-hole wells.