A Method for Recognition of Oil, Gas and Water in Gas Logging Based on Parameter Reconstruction

Abstract

The invention discloses a gas logging oil-gas-water identification method based on parameter reconstruction. The method comprises the following steps: through average values of C1-C8 of an oil testing well section, establishing two reconstruction parameters of two FLAIR gas loggings, that is, a TCZS parameter and a C7-8bC5-6 parameter; then using the C7-8bC5-6 parameter as a x-coordinate, and the TCZS parameter as a y-coordinate, and field oil testing result data, establishing a plate, determining limits of various fluid properties in the plate, and finally verifying on site. The method solves problems of difficulty of depending on software identification and hardware developers, enriches existing technical means, and improves oil-gas-water layer identification efficiency of a well, reduces identification difficulty, and improves technical level of field staff.

Description

technical field [0001] The invention relates to the field of identification of mud logging oil, gas and water, in particular, the invention relates to a method for identifying oil, gas and water of gas logging and mud logging based on parameter reconstruction. Background technique [0002] FLAIR (Flair Gas Logging) is a real-time formation fluid analysis system launched by a French geological service company in the early 21st century. It is a brand new gas analysis instrument that can analyze C 1 -C 8 hydrocarbon components, traditional gas measuring instruments can only analyze C 1 -C 8 Compared with traditional gas measuring instruments, the real-time analysis accuracy of formation fluid has higher accuracy (Huang Xiaogang, 2005, FLAIR Well Site Real-time Fluid Detection System, "Mud Logging Engineering"). [0003] As a new instrument, its own company has its own fluid analysis and identification method, but the method is limited by patent rights and software, and it i...

AI Technical Summary

Problems solved by technology

However, the existing formation oil, gas and water identification methods and software are in the hands of the owner of FLAIR, and it is impossible to understand and deeply understand the principles and processes of these methods

And the user of the instrument cannot independently apply and expand the function of the instrument

At the same time, the existing related technologies and methods are still based on the early gas logging plate recognition method, which is poorly adaptable to the FLAIR gas logging instrument, and has not yet formed a systematic and unique method suitable for this instrument, which cannot meet the site requirements.

[0005] With the advancement of petroleum exploration and development, the identification technology of oil, gas and water in unconventional oil and gas reservoirs has been paid more and more attention. Facing the difficulty of fluid identification in unconventional reservoirs, the identification rate of traditional logging identification methods is getting higher and higher. low, resulting in higher and higher error rates in the field of exploration and development of oilfields

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