Pagsubaybay sa presyon ng tubig ng balon ng langis gamit ang distributed fiber optic na pagsukat ng temperatura (DTS) at distributed fiber optic acoustic vibration sensing (ANG) teknolohiya-INNO

The principle and advantages of DTS

The distributed fiber optic temperature measurement system is sensitive to temperature based on the principle of optical time-domain reflection and Raman scattering effect to achieve temperature monitoring. The entire system uses fiber optic as the carrier for sensitive information sensing and signal transmission, which has the characteristics of continuous temperature measurement, distributed temperature measurement, real-time na pagsukat ng temperatura, electromagnetic interference resistance, intrinsic na kaligtasan, malayuang pagsubaybay, mataas na sensitivity, madaling pag-install, at mahabang buhay ng serbisyo. It is widely used in industries such as municipal comprehensive pipe galleries, mga pipeline, mga lagusan, mga kable, petrolyo at petrochemical, and coal mines.

How to monitor oil well pressure

Hydraulic fracturing is a key technology for efficient development of unconventional oil and gas reservoirs and hot dry rocks. Sa pamamagitan ng paggamit ng hydraulic fracturing upang baguhin ang reservoir at pagbuo ng isang fracture network structure sa reservoir, ang produksyon ng langis at gas ng mga balon ng langis at gas ay maaaring epektibong mapataas at ang produksyon ng init ng geothermal system (EGS) maaaring palakasin. Samakatuwid, ang mga artipisyal na bali na nabuo sa pamamagitan ng hydraulic fracturing ay isang direktang pagmuni-muni ng pagiging epektibo ng reservoir fracturing transformation at isang mahalagang batayan para sa pagsusuri ng kapasidad ng produksyon ng hydraulic fracturing wells. Sa kasalukuyan, Ang mga pamamaraan tulad ng microseismic monitoring at production logging ay karaniwang ginagamit upang subaybayan ang hydraulic fracturing process at post fracturing production process.. Ang mga pamamaraang ito ay may mataas na gastos sa pagpapatupad at kumplikadong mga operasyon, making it difficult to accurately monitor the fracturing process and production process of multi-stage fracturing artificial fractures. At saka, microseismic monitoring belongs to far-field monitoring, which is subject to many external interference factors and has poor accuracy. Samakatuwid, it is particularly important to seek a near-field monitoring method that can simultaneously monitor the hydraulic fracturing process and post fracturing production process.

With the development of distributed fiber optic temperature monitoring (DTS) at distributed fiber optic sound monitoring (ANG) mga teknolohiya, it provides an important means for real-time monitoring of hydraulic fracturing processes and post fracturing production monitoring. Ang pangunahing prinsipyo ng teknolohiya ng DTS ay ang paggamit ng prinsipyo ng pagmuni-muni ng mga optical fiber at ang sensitivity ng temperatura ng reverse Roman scattering ng optical fibers, umaasa sa dami ng relasyon sa pagitan ng pagpapalaganap ng liwanag sa optical fiber at ang mga pagbabago sa temperatura sa paligid ng optical fiber medium upang matukoy ang temperatura sa lokasyon ng optical fiber medium. Ang pangunahing prinsipyo ng teknolohiya ng DAS ay ang paggamit ng prinsipyo ng coherent optical time-domain reflection measurement upang mag-inject ng magkakaugnay na short pulse laser sa optical fiber.. Kapag kumikilos ang panlabas na vibration sa optical fiber, ang panloob na istraktura ng fiber core ay bahagyang mababago dahil sa nababanat na optical effect, resulting in changes in the back Rayleigh scattering signal and changes in the received reflected light intensity. By detecting the intensity changes of the Rayleigh scattering light signal before and after the downhole event, the current downhole fluid flow event can be detected and accurately located, thus achieving real-time monitoring of downhole production dynamics. Due to its characteristics of anti electromagnetic interference, paglaban sa kaagnasan, and good real-time performance, optical fibers have greater advantages in dynamic real-time monitoring of underground production.

During hydraulic fracturing, a large amount of low-temperature fracturing fluid enters the high-temperature formation, resulting in a decrease in temperature around the fracturing interval; Kasabay nito, when fracturing fluid enters the fracturing layer to create fractures, extend fractures, and flow in fractures, a large amount of noise is generated. The larger the cracks formed by the fracturing layer, the higher the temperature drop and the greater the noise amplitude. The use of highly sensitive and high-precision distributed fiber optic temperature and sound sensing technology can monitor in real time the position and quantity of ground layer fracturing, as well as the volume of fracturing fluid entering the fracturing formation, and thus infer the approximate geometric parameters of the cracks.
During the post production process, a large amount of fluid in the reservoir flows into the wellbore through cracks instead of reservoir matrix. When the fluid flows through the dense reservoir matrix and through cracks filled with proppants, different frequencies of noise are generated due to the physical differences in the medium, and the intensity of the noise is related to the flow rate; Bilang karagdagan, due to differences in reservoir temperature, thermal characteristics of oil and water, and density of oil and water, fluids with different flow rates and compositions will exhibit different temperature and sound velocity differences when flowing into and in the wellbore from cracks at different positions. By using high sensitivity and precision ipinamahagi na temperatura ng fiber optic and sound sensing technology, this temperature and sound velocity difference can be perceived, and then combined with corresponding mathematical models for interpretation, the production profile of the fractured well can be obtained, and effective fractured intervals can be determined and the fracturing effect evaluated.

Characteristics of DAS distributed fiber optic acoustic vibration sensing host system

The DAS distributed fiber optic acoustic vibration security sensing detection system can accurately locate the location of the incident, na may mataas na katumpakan, mabilis na oras ng pagtugon, kaligtasan sa sakit sa electromagnetic interference, pagkakabukod ng kuryente, fiber optic nature, and explosion-proof characteristics. Samakatuwid, it can be directly used in environments with different levels of perimeter security needs.

The DAS fiber optic perimeter security sensing system consists of distributed fiber optic hosts, detection optical cables, atbp. The distributed sensing system is widely used and reasonably priced.

DAS distributed fiber optic acoustic vibration sensing host system product functions

1. It can monitor vibration over long distances, with high positioning accuracy and stable system operation;

2. 24-hour real-time online monitoring without the need for manual duty, automatic alarm or device activation when exceeding the upper and lower limits of the warning, achieving high efficiency;

3. Short training time and convenient software operation;

Characteristics of DAS distributed fiber optic acoustic vibration sensing host products

1. FJINNO DAS fiber optic demodulator adopts independently developed advanced chips, which have fast processing speed, mataas na pagiging maaasahan, at mababang pagkonsumo ng kuryente;

2. Fiber optic sensors themselves have characteristics such as electrical insulation and immunity to electromagnetic interference, and can be directly used in hazardous materials such as petrochemicals;

3. Not easily affected by external environment.

Traditional temperature sensors are easily affected by lightning, lalo na para sa mga de-koryenteng sensor ng temperatura. Ang mga ibinahagi na fiber optic sensor ay ganap na naka-insulated sa kuryente at maaaring labanan ang mga epekto ng mataas na boltahe at mataas na kasalukuyang;

4. Ang laying density ng fiber optic sensors ay maaaring itakda nang nakapag-iisa upang matugunan ang mga aktwal na pangangailangan ng iba't ibang mga hotspot sa pagsukat ng temperatura;

Application field ng DAS distributed fiber optic acoustic vibration products

Online na pagsubaybay sa natural gas pipeline leaks

Online na pagsubaybay sa pagtagas ng pipeline ng langis, atbp.