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A Method of Imitating Vertical Seismic Profile Data Using Well Logging Data

A vertical seismic profile and logging data technology, which is applied in the field of petroleum geological exploration, can solve the problems of limited improvement in seismic data accuracy and few parameters, and achieves the effect of improving accuracy, being suitable for popularization and application, and having good application prospects.

Active Publication Date: 2019-03-01
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

However, the conventional logging acoustic wave time difference data can only be used to obtain the average velocity of the longitudinal wave and the layer velocity, etc., and cannot obtain the average velocity of the shear wave, the layer velocity, and the velocity ratio, Poisson's ratio, and Young's ratio converted from the velocity data of the longitudinal and shear waves. Modulus and other parameters, conventional logging acoustic time difference data provide few parameters for the processing and interpretation of seismic data, and the improvement of seismic data accuracy is limited

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  • A Method of Imitating Vertical Seismic Profile Data Using Well Logging Data
  • A Method of Imitating Vertical Seismic Profile Data Using Well Logging Data

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Experimental program
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Embodiment 1

[0020] The method of utilizing logging data to imitate vertical seismic section data of the present embodiment is carried out for J1 well, comprising the following steps:

[0021] 1) Perform environmental correction on natural gamma ray curves and bulk density curves in conventional logging data;

[0022] 2) Use the natural gamma ray curve after environmental correction to carry out lithology stratification, and obtain the natural gamma ray stratification result;

[0023] The compressional wave time difference, shear wave time difference, and compressional wave velocity ratio curves are obtained from the dipole acoustic logging data; the Poisson's ratio and Young's modulus curves are calculated by using the compressional wave time difference, shear wave time difference and the bulk density after environmental correction;

[0024] 3) Combining with the results of natural gamma layering, the longitudinal wave time difference, shear wave time difference, longitudinal wave velocit...

Embodiment 2

[0029] The method of using logging data to imitate vertical seismic profile data in this embodiment is carried out for Well Z1, and the specific method is the same as that of Embodiment 1.

[0030] figure 2 It is the imitation VSP diagram of well logging curve of Z1 well. From figure 2 The gray box of the well also has a relatively small P-to-s wave velocity ratio and Poisson's ratio, which is inferred to have a certain gas content. 4.75 cubic meters per ton, confirming the above inference.

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Abstract

The invention relates to a method for simulating vertical seismic profile data by using well logging data. The method includes the following steps: 1. performing environmental correction on the natural gamma curve and the volume density curve in conventional well logging data; 2. lithologically zoning on the natural gamma curve which undergoes environmental correction; 3. in combination with the result of natural gamma zoning, performing blocky processing on dipole acoustic well logging data, and using longitudinal wave time difference which undergoes blocky processing and transverse wave time difference which undergoes blocky processing, in combination with the volume density which undergoes environmental correction, to compute and obtain vertical seismic profile data comprising cumulative time, interval velocity, interval wave impedance and reflection coefficient and the like, thus providing more parameters for processing and analyzing seismic data. The method herein, on the basis of zoning strata through the natural gamma, processes dipole acoustic well logging data, computes the cumulative time, interval velocity, interval wave impedance and reflection coefficient and the like under the same lithological unit, can be applied to processing and analyzing seismic data, and increases the precision of analyzing results.

Description

technical field [0001] The invention belongs to the field of petroleum geological exploration, and in particular relates to a method for imitating vertical seismic section data by using logging data. Background technique [0002] In the process of oil and gas exploration and development, the spatial distribution description and quantitative evaluation of sand bodies are very important. Acquiring high-precision 3D seismic data is very important as the identification and description accuracy requirements for oil and gas reservoir sand bodies increase. For a long time, the application of seismic data has been mainly based on qualitative description and analysis. During processing and interpretation, the processing of deep-time relationship is the key to seismic data processing and interpretation. The direct depth-time relationship provided by Vertical Seismic Profile (VSP) data is valuable data for correct calibration of acoustic logging and surface seismic data. Since VSP lo...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01V1/48
CPCG01V1/48
Inventor 李健伟冉利民赵永刚陈雨晴温伟王磊杜娟胡挺王丹刘珺姜龙燕
Owner 中石化石油工程技术服务有限公司