Applicable conditions

Optical fiber logging technology is a recoverable wireline logging service, which enables operators to obtain downhole data in wells without permanent optical fiber instruments. The combination of distributed acoustic sensing system (DAS) and distributed temperature sensing measurement system (DTS) can measure cross well weak signal strain and microseismic events, obtain high-quality logging data, and combine it with analysis technology, It can transform optical fiber data into analyzable images and provide complete solutions for the field.

Optical fiber logging technology can be deployed in inclined or horizontal wells. It is an optical cable that can be pumped or pulled downward. In addition, the cable can also be compatible with other cable tools.




Technical advantages

With a novel optoelectronic structure, the sound field at each position can be digitally recorded along a single-mode or multimode fiber.

The frequency range is less than 0.001Hz to more than 100kHz, and the spatial resolution is as low as 1 meter.

The fidelity of amplitude, frequency and phase allows for many advanced applications.


Technical indicators


 optimal sampling resolution = 25cm

 sampling frequency = 100hz-100khz

 measurement range = up to 50km

 it can be easily deployed in remote and harsh environments.

 optimal spatial resolution = 1m

 frequency range = 0.001Hz to 50KHz

 dynamic range = > 100dB @10hz

 compatible with standard single-mode and multimode optical fibers



Field application



At present, the fracturing monitoring of five horizontal wells has been carried out in Changqing Oilfield, Fuling shale gas and Zhejiang oilfield. Compared with the traditional geophone, the optical fiber logging has higher sensitivity, wider monitoring range and longer monitoring time, which plays a guiding role in the evaluation of fracturing effect and the optimization of fracturing scheme.

Fiber optic logging performance

Our company attaches great importance to the development of fiber optic logging technology, guided by market demand, and has formed a relatively complete fiber optic logging service capability through various means such as resource integration, equipment introduction, and technical cooperation. We have the technical service capabilities of permanent fiber optic deployment and monitoring along the oil pipeline in gas storage, gas-liquid interface monitoring, horizontal well gas/oil production profile monitoring, and horizontal well adjacent well fracturing fiber optic monitoring.