A method for identifying oil, gas and water based on the intersection of physical properties and gas logging parameters

Abstract

The invention discloses a method for oil-gas-water identification based on physical property and gas logging parameter intersection. The method comprises the following steps: reading the C1-C8 average of test well sections by collecting site gas logging data, well logging interpretation porosity data and oil testing data, performing parameter reconstruction, obtaining a TCS parameter, building a plate, determining limit of various fluid properties in the plate, performing on-site verification, and performing popularization and application in more wells on the site if no error occurs. The method solves the problem of immoderate reliance on software identification and hardware developers, enriches existing technical means, improves well drilling oil-gas-water layer identification efficiency, reduces identification difficulty, improves technical levels of field workers and also has the effect of promoting later-period oil-gas-water identification and instrument popularization.

Description

technical field [0001] The invention relates to the field of mud logging oil, gas and water identification, in particular, the invention relates to an oil, gas and water identification method based on the intersection of physical properties and gas logging parameters. 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, ...

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

Images