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Description and evaluation method for spatial distribution of sand bodies, of seismic attribute, in clastic rock reservoir

A technology of seismic attributes and spatial distribution, applied in the field of petroleum geological exploration, can solve the problems of low prediction accuracy and poor identification of thin interbedded sand bodies, and achieve the effects of good application prospects, good adaptability and improved accuracy.

Active Publication Date: 2017-03-22
CHINA PETROLEUM & CHEM CORP +4
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Problems solved by technology

[0005] The purpose of the present invention is to provide a method for describing and evaluating the spatial distribution of seismic attribute sand bodies in clastic rock reservoirs, so as to solve the problem of low prediction accuracy of existing seismic attribute interpretation methods, especially the poor identification of thin interbedded sand bodies

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  • Description and evaluation method for spatial distribution of sand bodies, of seismic attribute, in clastic rock reservoir
  • Description and evaluation method for spatial distribution of sand bodies, of seismic attribute, in clastic rock reservoir
  • Description and evaluation method for spatial distribution of sand bodies, of seismic attribute, in clastic rock reservoir

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Embodiment 1

[0155] The method for describing and evaluating the spatial distribution of seismic attribute sand bodies in clastic rock reservoirs in this embodiment is performed for shallow channel sand bodies in the TK1115 block, and includes the following steps:

[0156] 1) Use the method in section 2.1 above to perform spline interpolation and encrypted sampling on the post-stack seismic data to obtain encrypted sampled seismic data;

[0157] 2) Calculate different types of seismic attributes from the encrypted seismic data using the method in section 2.2 above; select the impedance, maximum value, and waveform according to the sensitive relationship between each type of seismic attribute and lithology, porosity, permeability, and oil and gas. Classification, total amplitude, average amplitude, root mean square amplitude, and maximum peak amplitude attributes are comprehensive seismic attributes. Among them, the root mean square amplitude attributes well reflect the meandering channel sand bo...

Embodiment 2

[0162] The method for describing and evaluating the spatial distribution of seismic attribute sand bodies in clastic rock reservoirs in this embodiment is performed for deep channel sand bodies in block TK1115, and includes the following steps:

[0163] 1) Use the method in section 2.1 above to perform spline interpolation and encrypted sampling on the post-stack seismic data to obtain encrypted sampled seismic data;

[0164] 2) Calculate different types of seismic attributes from the encrypted seismic data using the method in section 2.2 above; select the impedance, maximum value, and waveform according to the sensitive relationship between each type of seismic attribute and lithology, porosity, permeability, and oil and gas. Classification, total amplitude, average amplitude, root mean square amplitude, and maximum peak amplitude attributes are comprehensive seismic attributes. Among them, the root mean square amplitude attributes well reflect the meandering channel sand body shap...

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Abstract

The invention discloses a description and evaluation method for spatial distribution of sand bodies, of a seismic attribute, in a clastic rock reservoir. The method comprises the following steps that 1) batten interpolation and encrypted sampling are carried out on post-stack seismic data to obtain encrypted sampled seismic data; 2) according to sensitive relations between the seismic attribute and lithology, pore permeability and petroliferous performance, a seismic attribute combination is optimized, and an integrated seismic attribute is obtained; 3) spatial distribution of dessert sand bodies is identified according to the integrated seismic attribute; and 4) spatial distribution of dessert sand bodies is combined, and a logging porosity and the petroliferous performance are calibrated to realize identification and integrated evaluation for sand bodies of the clastic rock reservoir. According to the method, features of the seismic attribute data calibrated by the logging data are considered in an integrated manner, technologies of logging data calibration, batten interpolation and encrypted sampling of seismic data, seismic attribute extraction and analysis on slicing zero points of the attribute are applied comprehensively, the thickness and physical parameters of the sand bodies of the seismic attribute are evaluated, and the prediction and evaluation precision of the sand bodies of the reservoir are improved.

Description

Technical field [0001] The invention belongs to the field of petroleum geological exploration, and specifically relates to a method for describing and evaluating the spatial distribution of seismic attribute sand bodies in clastic rock reservoirs. Background technique [0002] In the oil and gas exploration and development of clastic rock reservoirs, the description and quantitative evaluation of the spatial distribution of sand bodies are very important. In particular, the current oil and gas exploration has shifted from traditional structural, especially reservoirs, to subtle tight lithologic reservoirs, which is important for oil and gas reservoirs. The identification and description accuracy of layered sand bodies is becoming higher and higher, which can only be achieved with the help of high-precision three-dimensional seismic data. Since the agreement, the application of seismic attributes is mainly based on qualitative description and analysis, and the distribution descrip...

Claims

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Application Information

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IPC IPC(8): G01V1/30
CPCG01V1/306G01V1/307G01V2210/624G01V2210/6246G01V2210/63
Inventor 冉利民沈金松赵永刚李健伟陈利雯滑爱军齐真真高勃胤陈婵娟吉倩倩张晓晨何培良
Owner CHINA PETROLEUM & CHEM CORP
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