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Water flooded layer well logging evaluation method and system

A water-flooded layer and water-flooded technology, applied in surveying, earthwork drilling, wellbore/well components, etc., can solve the problems of accuracy deviation, influence of evaluation results, deviation of interpretation parameter evaluation results, etc., to avoid error problems, The effect of improving accuracy

Active Publication Date: 2014-03-26
BC P INC CHINA NAT PETROLEUM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] 1. If the logging data is affected by certain factors and the accuracy deviates, it will have a great impact on the final evaluation results;
[0004] 2. Regardless of which logging data is used for evaluation, improper selection of interpretation parameters may cause deviations in evaluation results
For example: in practical applications, the interpretation parameters cannot be the same point by point, so improper selection of interpretation parameters will cause deviations in the evaluation results

Method used

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  • Water flooded layer well logging evaluation method and system
  • Water flooded layer well logging evaluation method and system
  • Water flooded layer well logging evaluation method and system

Examples

Experimental program
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Effect test

Embodiment 1

[0022] Embodiment 1 of the present invention provides a logging evaluation method for a water-flooded layer, taking the logging evaluation of well point 3 in oil layer 3 as an example, as figure 2 As shown, the method includes the following steps:

[0023] Step 201, obtaining sample values ​​of at least two water-flooded intensity evaluation indicators of the same water-flooded layer in the same oil well;

[0024] Wherein, the water flooding intensity evaluation index includes physical property evaluation index, shale content, movable water saturation, water absorption profile influence factor and fluid production profile influence factor. The sample values ​​of water flooding intensity evaluation indicators come from the same oil layer as the same oil well point, for example: physical property evaluation indicators, shale content, movable water saturation, water absorption profile influence factors and liquid production profile influence factors are all related to wells The...

Embodiment 2

[0058] Embodiment 2 of the present invention provides a kind of well logging evaluation method of water-flooded layer, taking the well logging evaluation of well point 3 in oil layer 3 as an example, as image 3 As shown, the method includes the following steps:

[0059] Step 301, obtaining sample values ​​of at least two water-flooded intensity evaluation indicators of the same water-flooded layer in the same oil well;

[0060] Step 302, performing weight analysis on the sample value of the flooding intensity evaluation index to obtain the weight value of the flooding intensity evaluation index;

[0061] Step 303: According to the weight of the water flooding intensity evaluation index, perform weighted calculation on the sample value of the water flooding intensity evaluation index to obtain the water flooding index of the water flooded layer, so as to determine the water flooding index in the oil well. The flooding intensity of the submerged layer.

[0062] Step 304: Calc...

Embodiment 3

[0069] Embodiment 3 of the present invention provides a kind of water-flooded layer logging evaluation system, such as Image 6 As shown, the system includes an evaluation index acquisition device 610 and a computing server 620, wherein,

[0070] The evaluation index obtaining device 610 is used to obtain sample values ​​of at least two water flooding intensity evaluation indexes of the same water flooded layer in the same oil well, and the water flooding intensity evaluation indexes include physical property evaluation index, shale content, movable water Saturation, water absorption profile influence factor and fluid production profile influence factor, the oil well is located in an oil field well pattern, and the oil field well pattern includes at least two oil wells;

[0071] The calculation server 620 is configured to perform weight analysis on the sample values ​​of the flooding intensity evaluation indicators acquired by the evaluation index acquisition device 610, and o...

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Abstract

The invention relates to the technical field of well logging and discloses a water flooded layer well logging evaluation method and system. Sample values of at least two water flooding strength evaluation indexes of the same water flooded layer in a same petroleum well are acquired, weight analysis is performed on the sample values of the water flooding strength evaluation indexes, the weights of the water flooding strength evaluation indexes are acquired, according to the weights of the water flooding strength evaluation indexes, the sample values of the water flooding strength evaluation indexes are subjected to weighing calculation to obtain water flooding indexes of the water flooded layer, and thus the water flooding strength of the water flooded layer in the petroleum well is determined, and the accuracy of well logging evaluation of the water flooded layer is improved. Errors caused by a single-factor evaluation method are avoided.

Description

technical field [0001] The invention relates to the field of well logging technology, in particular to a well logging evaluation method and system for a water flooded layer. Background technique [0002] Due to the long-term development of the oilfield, the oilfield has entered a stage of high water cut and high production. Therefore, accurate evaluation of the water-flooded layer and remaining oil saturation is very important for the adjustment of potential tapping and the implementation of oil recovery plan in the middle and later stages of oilfield development. At present, there are many methods for comprehensive evaluation of water-flooded zone and remaining oil saturation. The current water-flooded zone logging includes open hole logging, production logging, etc., and remaining oil saturation evaluation methods are based on differential model and water flooding oil saturation. However, the existing logging evaluation methods for water-flooded zones are only based on a c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B49/00E21B47/00
Inventor 令狐松郭海敏段朝伟王婧慈单沙沙徐文远
Owner BC P INC CHINA NAT PETROLEUM CORP
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