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Analytical method of X-ray fluorescence terrigenous clastic rock porosity in petroleum well drilling

A technology of fluorescence analysis and oil drilling, which is applied in the direction of earthwork drilling, wellbore/well components, etc.

Active Publication Date: 2012-05-23
中石化石油工程技术服务有限公司 +3
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] The X-ray fluorescence analysis method for petroleum drilling involved in the present invention has been found by the Research Institute of Petroleum Exploration and Development of China Petroleum & Chemical Co., Ltd., and the X-ray fluorescence of cuttings is used for mud logging lithology identification and element analysis. Except for the above-mentioned disclosed patent application Except for the patent of "Petroleum Drilling Geology X-ray Fluorescent Cuttings Logging Method", there are no other similar domestic and foreign documents published publicly

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  • Analytical method of X-ray fluorescence terrigenous clastic rock porosity in petroleum well drilling
  • Analytical method of X-ray fluorescence terrigenous clastic rock porosity in petroleum well drilling
  • Analytical method of X-ray fluorescence terrigenous clastic rock porosity in petroleum well drilling

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Embodiment 1

[0041] The method for analyzing the porosity of terrigenous clastic rocks in petroleum drilling by using X-ray fluorescence of the present invention includes performing X-ray fluorescence analysis on cores and cuttings at the drilling site, normalization processing of ferrosilicon element analysis data, porosity calculation, Data processing and technology of drawing rock porosity curve according to well depth. In this example, the X-ray fluorescence analysis data of Well A in the Ordos Basin are selected for illustration. The specific steps are as follows:

[0042] (1) X-ray fluorescence analysis of core and cuttings

[0043] The energy dispersive X-ray fluorescence analyzer is used to continuously analyze the chemical elements of the core and cuttings samples at the oil drilling site. During the analysis, the core and cuttings samples are crushed and tableted first, and then analyzed by X-ray fluorescence.

[0044] 1. Selection of analytical instruments

[0045] The analyt...

Embodiment 2

[0082] Such as figure 2 as shown, figure 2 It is a comprehensive analysis diagram of the X-ray fluorescence analysis interpretation results of drilling core samples from Well B in the Ordos Basin and the results of conventional mud logging, geophysical logging, laboratory analysis and testing.

[0083] figure 2 The contents include: 1. Formation; 2. Density—the density curve of geophysical well logging; 3. Neutron——the neutron curve of geophysical well logging; 4. Logging porosity——the density according to geophysical well logging Porosity curve calculated with neutron; 5. Well depth - drilling depth 2382-2448 meters; 6. Lithology profile - lithology profile based on comprehensive interpretation of conventional mud logging and geophysical logging; 7. Iron - X 8. Silicon—the pulse value of silicon element in X-ray fluorescence analysis; 9. X-ray porosity——the rock porosity value calculated based on the iron and silicon element values ​​of X-ray fluorescence analysis; 10. ...

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Abstract

The invention relates to a method for using X-ray fluorescence to analyze the extent of porosity of terrigenous clasolite in oil drilling; the method comprises the following steps of: adopting an energy dispersion-typed X-ray fluorescence analyzer to carry out continuous analysis to the chemical elements in the rock core and rock debris in the oil drilling field with the drilling depth; obtainingthe analysis data of the X-ray fluorescence changing with the depth; selecting silicon and ferrum elements which have obvious positive and negative relationship with the reservoir property of the rock; using the data of the silicon and ferrum elements to carry out 0-1 normalization data calculation; then calculating the extent of porosity; finally mapping the curve of the extent of porosity; and evaluating the reservoir property according to the curve of the extent of porosity and the value of the extent of porosity. The method of the invention can carry out X-ray fluorescence analysis and the analysis of the extent of porosity of the terrigenous clasolite in real time, use the data of the extent of porosity in real time to carry out quantitative evaluation to the reservoir property of the rock, form a geology explanation and evaluation method with the drilling based on the analysis of the X-ray fluorescence and guide exploration and development practice of oil and natural gas accurately and effectively.

Description

1. Technical field: [0001] The invention relates to a method for analyzing porosity in petroleum drilling geology, in particular to a method for analyzing the porosity of terrigenous clastic rocks in petroleum drilling by using X-ray fluorescence. 2. Background technology: [0002] Rocks in nature are divided into three categories: igneous rocks, sedimentary rocks, and metamorphic rocks. According to the GB / T 17412.2-1998 national standard, sedimentary rocks are divided into three categories: volcanic-sedimentary clastic rocks, terrigenous sedimentary rocks, and endogenous sedimentary rocks. Among them, terrigenous sedimentary rocks are divided into two categories: terrigenous clastic rocks and argillaceous rocks. At present, the oil and gas reservoir rocks in most oilfields in my country are terrigenous clastic rocks, and porosity is an important index to evaluate the reservoir performance of terrigenous clastic rocks. [0003] "Porosity" refers to the ratio of the pore v...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B49/00
Inventor 陈英毅何国贤周天顺王飞龙杨勇
Owner 中石化石油工程技术服务有限公司
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