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Method and device for determining tuffaceous contents by means of elementary capture energy spectrum well logging

A technology of energy spectrum logging and element capture, which is applied in measurement devices, geophysical measurements, earth-moving drilling and mining, etc., can solve the problems of poor accuracy and applicability, low accuracy, etc. Effect

Active Publication Date: 2016-01-20
PETROCHINA CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] In order to solve the problems of low accuracy, poor precision and poor applicability in the existing methods for determining the content of tuffaceous matter, the present invention further proposes a method and device for determining the content of tuffaceous matter by using elemental capture energy spectrum logging, specifically Including the following technical solutions:

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  • Method and device for determining tuffaceous contents by means of elementary capture energy spectrum well logging
  • Method and device for determining tuffaceous contents by means of elementary capture energy spectrum well logging
  • Method and device for determining tuffaceous contents by means of elementary capture energy spectrum well logging

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Embodiment 1

[0040] combine figure 2 As shown, the method for determining the content of tuffaceous matter by using elemental capture spectroscopy logging provided in this embodiment includes:

[0041] Step 21, obtaining logging data of the well to be logged for reconstruction of the element capture spectrum logging curve.

[0042] The logging data to be collected and sorted may include: conventional logging curves, element capture spectrum logging curves, experimental analysis data of whole-rock oxides, mud logging data and related geological data.

[0043] Step 22, reconstructing the real natural gamma ray logging response curve of the well to be logged according to the element capture spectrum logging curve.

[0044] The real natural gamma ray log response curve reconstructed is obtained by using the elemental information such as Si, Ca, Fe, Mg and so on provided by the element capture spectrum logging data, and according to the predetermined natural gamma ray curve reconstruction met...

Embodiment 2

[0072] This embodiment provides a device for determining the content of tuffaceous matter by using elemental capture spectroscopy logging, combining Figure 9 shown, including:

[0073] The reconstruction unit 91 is used to reconstruct the real natural gamma ray logging response curve of the well to be logged according to the element capture energy spectrum logging curve;

[0074] The tuffaceous interval determination unit 92 is used to compare the real GR logging response curve with the measured GR logging response curve of the well to be logged, so as to obtain the interval of the TUuffy component;

[0075] A crossplot building unit 93, which is used to build a crossplot of the product of the measured natural gamma ray logging response curve and the thorium curve-compensated neutron logging curve according to the interval of the tuffaceous component;

[0076] The tuffaceous content determining unit 94 is configured to determine the tuffaceous content according to the positi...

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Abstract

The invention provides a method and a device for determining tuffaceous contents by means of elementary capture energy spectrum well logging, and belongs to the technical field of oil and gas exploration well logging. The method includes reconstructing real natural gamma well logging response curves of to-be-logged wells according to elementary capture energy spectrum well logging curves; comparing the real natural gamma well logging response curves with measured natural gamma well logging response curves to obtain layer sections of tuffaceous components; creating cross plots of the measured natural gamma well logging response curves and products of thorium curves-compensate neutron well logging curves; determining the tuffaceous contents according to locations of sample points of the measured natural gamma well logging response curves in the cross plots. The method and the device have the advantages that the cross plots of the measured natural gamma well logging response curves and the products of the thorium curves-compensate neutron well logging curves are created, the tuffaceous contents are determined according to regions of the sample points of the measured natural gamma well logging response curves in the cross plots, and accordingly obtained results are high in accuracy and precision and good in applicability.

Description

technical field [0001] The invention relates to a method and a device for determining tuffaceous content by using element capture energy spectrum logging, and belongs to the technical field of oil and gas exploration well logging. Background technique [0002] In recent years, with the continuous improvement of exploration and development, complex tuffaceous sandstones, as transitional rocks between volcanic rocks and sedimentary rocks, have received more and more attention. A large number of core and thin section observations show that the complex tuffaceous sandstone is rich in tuffaceous components, affected by volcanism and the composition of magmatic parent rocks, the complex types of tuffaceous are diverse, and their mineral composition, clastic content, and degree of alteration These factors have a direct impact on the pore structure and reservoir performance of the reservoir. How to accurately identify tuffaceous components and obtain their precise content is the ba...

Claims

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Application Information

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IPC IPC(8): E21B49/00G01V5/12
Inventor 武宏亮李宁王克文冯周冯庆付
Owner PETROCHINA CO LTD
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