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Method for distinguishing effectiveness of reservoir bed through stoneley wave energy loss degree

A technology of energy loss and effectiveness, which is applied in the field of reservoir effectiveness identification and Stoneley wave energy loss degree to determine the effectiveness of reservoirs. It can solve the problems of effective reservoir identification accuracy and cumbersome process, etc., and achieves convenient operation. , the method is simple, and the effect of a wide range of applications

Inactive Publication Date: 2015-01-28
CHINA NAT PETROLEUM CORP CHUANQING DRILLING ENG CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This method takes into account the degree of Stoneley wave energy attenuation and the information of reservoir porosity, but fails to establish a relational expression with porosity, and requires the data of multiple wells to establish the discrimination standard, the process is cumbersome, and the effective reservoir The discrimination accuracy also needs to be improved

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  • Method for distinguishing effectiveness of reservoir bed through stoneley wave energy loss degree
  • Method for distinguishing effectiveness of reservoir bed through stoneley wave energy loss degree

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Embodiment 1

[0033] A method for judging the effectiveness of reservoirs by using the Stoneley wave energy loss degree, including: formation rocks and reservoir pores have different Stoneley wave energy response characteristics, and the Stoneley wave energy extracted from array acoustic logging data The energy is the comprehensive response of the Stoneley wave energy of formation rocks and the degree of Stoneley wave energy loss in the pores, so the relationship between Stoneley wave energy and porosity is established. By inputting the porosity calculated by well logging, the average Stoneley wave energy and the Stoneley wave energy of formation rocks, the loss degree of Stoneley wave energy in pores can be calculated. The larger the Stoneley wave energy loss degree value is, the more Stoneley wave energy loss is, which reflects the better connectivity between reservoir pores and better reservoir effectiveness. The invention not only considers the Stoneley wave energy and formation porosit...

Embodiment 2

[0052] The present invention is used to judge the validity of reservoirs in complex lithology clastic strata in a certain block, and the coincidence rate of the judgment of reservoir validity is above 90%.

[0053] attached figure 1 , 2 It is the result map of reservoir effectiveness discrimination of two wells A and B in this block. Tracks 1, 2, 3, and 4 in the figure are depth and conventional logging curves; Tracks 5 and 6 are lithology profiles and porosity obtained from logging data processing; Tracks 7 and 8 are interpretation conclusions and gas test results; The 9th, 10th and 11th tracks are the longitudinal wave energy, shear wave energy and Stoneley wave energy curves extracted from the array acoustic wave data; the 12th track is the Stoneley wave energy loss degree curve calculated according to the present invention.

[0054] From attached figure 1 It can be seen from the figure that the porosity of the 1# reservoir is between 5% and 10%, and the pores are rela...

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Abstract

The invention discloses a method for distinguishing the effectiveness of a reservoir bed through stoneley wave energy loss degree. The method comprises the steps of regarding stoneley wave energy extracted from array acoustic logging information as comprehensive response of stoneley wave energy of stratum rock and stoneley wave energy loss degree in pores, establishing a relational expression between the stoneley wave energy and porosity, working out the stoneley wave energy loss degree in pores, and distinguishing the effectiveness of the reservoir bed according to the stoneley wave energy loss degree. The method not only takes the stoneley wave energy of the stratum rocks into account, but also establishes the relational expression between the stoneley wave energy and the porosity, can work out the loss degree of the stoneley wave energy in the pores of the reservoir bed according to the relational expression, and further distinguishes the effectiveness of the reservoir bed.

Description

technical field [0001] The invention relates to a method for judging the validity of a reservoir, in particular to a method for judging the validity of a reservoir by using the Stoneley wave energy loss degree, and belongs to the technical field of application of array acoustic logging data. Background technique [0002] Array acoustic waves have unique advantages in reservoir permeability evaluation, because the Stoneley wave energy extracted from array acoustic wave logging data is closely related to the permeability of formations, so it is often used to judge the effectiveness of reservoirs. At present, there are generally two methods to evaluate the effectiveness of reservoirs by using Stoneley wave energy: one is to check whether the Stoneley wave energy in the reservoir section has attenuated. layer. For example, the method and application of using Stoneley waves to calculate formation permeability disclosed in the 2005 06 issue of "Logging Technology". This method f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B49/00
CPCE21B49/00
Inventor 罗利杨嘉齐宝权张树东王勇军毛英雄
Owner CHINA NAT PETROLEUM CORP CHUANQING DRILLING ENG CO LTD
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