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Drilling fluid rationing fluorescent logging method

A drilling fluid and fluorescence technology, which is applied in fluorescence/phosphorescence, wellbore/well components, and earth-moving drilling and mining, etc., can solve the problems of less cuttings returning, difficult display, etc., and achieves convenient sampling and simple operation process. , Make up for the effect of accurate oil and gas identification

Inactive Publication Date: 2003-02-26
CNPC BOHAI DRILLING ENG
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Problems solved by technology

[0004] The purpose of the present invention is to overcome the disadvantages that it is very difficult to identify and implement oil and gas shows by using cuttings as a medium by using the existing mud logging technology due to the reasons such as fine cuttings, less return of cuttings, and retention of cuttings at the bottom of the well, and provide a A Method for Directly Identifying Oil and Gas Shows Through Drilling Fluid Using Quantitative Fluorescence Analysis

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  • Drilling fluid rationing fluorescent logging method
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Embodiment Construction

[0010] Concrete implementation steps of the present invention are as figure 1 As shown, the process is as follows:

[0011] (1) Take the drilling fluid as the drilling fluid background sample before the drilling fluid enters the well, and take the drilling fluid back out of the wellhead as the drilling fluid sample. Put 1 ml each of the drilling fluid sample and the drilling fluid background sample into 5 ml of reagent In the test tube, seal and soak for 10 to 20 minutes, then take the transparent liquid, and analyze it with reference to the specific operation steps and operating procedures for analyzing rock chip samples with a quantitative fluorescence analyzer;

[0012] (2) Analyze and compare the drilling fluid background sample and the drilling fluid sample, observe the spectrogram shape and the change of the corresponding oil content, conduct a comprehensive analysis, determine and deduct the background value;

[0013] (3) Utilize the morphological changes of the sample...

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Abstract

A drilling fluid quantitative fluorescence well logging method includes taking the drilling fluid before entering well as background sample and the drilling fluid returned from the well as logging sample, and soaking the background sample and the logging sample, and analysis by the steps similar to those in rock chip sample analysis. The varied trend of the drilling fluid quantitative fluorescence well logging diagram is used in judging hydrocarbon reservior. The said method is simple and practical, and is used for petroleum exploration.

Description

technical field [0001] The invention relates to a mud logging method in oil exploration drilling, in particular to a drilling fluid quantitative fluorescence mud logging method. Background technique [0002] At present, most geological evaluations in oil exploration and drilling use cuttings fluorescence logging methods, such as the CN1172257A Chinese invention patent application "A Cuttings Fluorescence Logging Method" published in 1998, using a method that has no quenching effect on the fluorescence of crude oil Hexane replaces halogen-containing reagents such as carbon tetrachloride, and the wavelength of the excitation fluorescence light source is 280nm. The grating that can pass the wavelength of 300-500nm is selected, and the fluorescence spectrum analysis instrument is used for quantitative analysis. [0003] With the application of new drilling technologies and techniques, cuttings are finely broken, sometimes as fine as flour, and drift in the drilling fluid, making...

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Application Information

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IPC IPC(8): E21B49/00G01N21/64
Inventor 安文武石丰甫袁保清苏金龙宋庆彬贾立起周建生王文革
Owner CNPC BOHAI DRILLING ENG
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