Downhole laser Raman while-drilling oil-gas detection system

Abstract

The invention discloses a downhole laser Raman while-drilling oil-gas detection system. The downhole laser Raman while-drilling oil-gas detection system comprises a data processor and a Raman instrument which are installed in a compressive cabin, the compressive cabin is fixed into a drill pipe nipple, the data processor is used for analyzing data of the Raman detection instrument and transmittingthe data to the outside, a host of the Raman instrument connected with the data processor through a circuit is installed in the compressive cabin, and a probe of the Raman instrument is in contact with a detection sample pool arranged in the drill pipe nipple. According to the downhole laser Raman while-drilling oil-gas detection system, hydrocarbon materials in upward drilling liquid are detected, oil-gas resources in a stratum can be quickly analyzed by comparing an obtained Raman spectrum with a Raman spectrum of crude oil, and by using the characteristics of fastness, convenience and accuracy of a laser Raman technology, the problems existing in the field of while-drilling oil-gas detection that a device is complex, the detection time is long, conditions for samples are harsh, and thedependence on a gas-liquid separation film is excessive are solved.

Description

technical field [0001] The invention relates to the technical field of petroleum exploration, in particular to a downhole laser Raman oil and gas detection system while drilling. Background technique [0002] Hydrocarbon detection technology while drilling With the development of oil and gas exploration and development, this technology plays a pivotal role in it. With the help of related equipment and special detection tools while drilling, the geological information and construction conditions of underground reservoirs are collected, and then the collected downhole information is analyzed. It is an indispensable technology in the field of oil and gas exploration to process, analyze, interpret, evaluate, etc., and judge the oil and gas information of downhole formations. [0003] At present, the commonly used detection technology methods mainly include: ① Infrared spectroscopy, infrared absorption spectroscopy is the spectrum formed by the molecular vibration-rotation energy...

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Problems solved by technology

[0005] The purpose of the present invention is to provide a downhole laser Raman oil and gas detection system while drilling. By detecting the hydrocarbons in the upward oily drilling fluid, the Raman spectrum obtained can be quickly analyzed by comparing the Raman spectrum with the Raman spectrum of crude oil. The oil and gas resources in the formation, using the rapid, convenient and accurate characteristics of laser Raman technology, solves the problems of complex devices, long detection time, harsh conditions for samples and transitional dependence on gas-liquid separation membranes in the field of oil and gas detection while drilling. And other issues

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