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Underground fluid component measuring system and method based on distributed optical fiber sensing

A distributed optical fiber and underground fluid technology, applied in the field of measurement, can solve problems such as low efficiency, inability to analyze fluid components in real time and in situ, and achieve the effect of increasing production

Pending Publication Date: 2021-05-11
OPTICAL SCI & TECH (CHENGDU) LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The sampling efficiency of this type of instrument is extremely low. Each downhole operation can only collect a maximum of 12 fluid samples from the downhole formation, and it is impossible to perform real-time in-situ analysis of the fluid components in the formation.

Method used

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  • Underground fluid component measuring system and method based on distributed optical fiber sensing
  • Underground fluid component measuring system and method based on distributed optical fiber sensing

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Embodiment Construction

[0040] In order to facilitate the understanding of the present invention, the present invention will be described in more detail below in conjunction with the accompanying drawings and specific embodiments. Preferred embodiments of the invention are shown in the accompanying drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described in this specification. On the contrary, these embodiments are provided to make the understanding of the present disclosure more thorough and comprehensive. They are not intended to limit the present invention, but are merely examples, and at the same time, the advantages of the present invention will become clearer and easier to understand.

[0041] A specific implementation of the downhole fluid component measurement and distribution dynamic monitoring system based on distributed optical fiber sensing of the present invention is as follows:

[0042] Such as figure 1 As sho...

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Abstract

The invention provides an underground fluid component measuring system and method based on distributed optical fiber sensing. The system is characterized in that an armored optical cable is bound on the outer side of a casing of a vertical well, an inclined well or a horizontal well and is permanently fixed by well cementation cement, and a laser Raman spectrum / DAS / DTS composite instrument on the ground of a wellhead is connected with the armored optical cable outside the underground casing near the wellhead, so that the system for real-time in-situ rapid measurement and analysis of underground fluid components and saturation based on distributed optical fiber sensing and long-term dynamic monitoring of a fluid production profile of an oil and gas production well is formed. The system can quickly measure and analyze the components of various fluids and the proportion or saturation of the various fluids in the underground formation in real time in situ in a new drill hole, and can monitor the dynamic change conditions of the various fluids in each reservoir or each perforation interval in real time in the production process of an oil and gas well, so that indispensable means, systems and methods are provided for accurate evaluation, scientific management, optimal development and recovery efficiency improvement of oil and gas reservoirs.

Description

technical field [0001] The invention belongs to the technical field of measurement, and in particular relates to an in-situ measurement system and method for underground fluid components based on distributed optical fiber sensing. Background technique [0002] Optical fiber sensing technology began in 1977 and developed rapidly with the development of optical fiber communication technology. Optical fiber sensing technology is an important symbol to measure the degree of informatization of a country. Optical fiber sensing technology has been widely used in military, national defense, aerospace, industrial and mining enterprises, energy and environmental protection, industrial control, medicine and health, metrology and testing, construction, household appliances and other fields, and has a broad market. There are hundreds of optical fiber sensing technologies in the world, and physical quantities such as temperature, pressure, flow, displacement, vibration, rotation, bending,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B47/00E21B47/017E21B47/06E21B47/07E21B47/12E21B21/08
CPCE21B47/00E21B47/06E21B47/12E21B21/08
Inventor 余刚梁兴王熙明安树杰冉曾令夏淑君
Owner OPTICAL SCI & TECH (CHENGDU) LTD
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