Extraction Method of Instantaneous Attributes of Lithologic Reservoirs
An extraction method and oil and gas reservoir technology, applied in the field of extraction of instantaneous attributes of lithological oil and gas reservoirs, can solve the problems of difficult seismic resolution, untargeted seismic attributes, narrow favorable facies band, etc.
Active Publication Date: 2018-12-25
PETROCHINA CO LTD
View PDF4 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
However, because lithologic reservoirs are affected by factors such as various shapes, complex genesis, subtle distribution, microstructures, small faults and thin beds, it is more difficult to extract seismic attributes, which is mainly reflected in the following aspects: First, because the channel sand is small, scattered, and thin, it is difficult to distinguish seismicity; second, because the delta front sand, single sand body is thin, and interbedded with mudstone, the seismic reflection characteristics are not obvious; third, because the fan The delta sand body is affected by multiple provenance and fast facies change, making the favorable facies belt narrow
Moreover, the currently used software is not specific to the seismic attributes that need to be extracted, making it impossible to effectively describe complex lithologic oil and gas reservoirs
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0084] In order to make the objectives, technical solutions, and advantages of the present invention clearer, the embodiments of the present invention will be described in further detail below in conjunction with the accompanying drawings.
[0085] See figure 1 , Which shows the flow of the method for extracting instantaneous attributes of lithologic oil and gas reservoirs according to an embodiment of the present invention. The method for extracting instantaneous attributes of lithologic reservoirs includes the following steps:
[0086] (1) Empirically decompose the first original seismic signal among the read-in multi-channel original seismic signals to obtain intrinsic modal function components of different time scales, and reconstruct the first original seismic signal to obtain multiple The first reconstructed original seismic signal in the reconstruction of the original seismic signal;
[0087] (2) Perform Hilbert transform on the intrinsic mode function components of different...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention discloses a method for extracting the instantaneous attributes of a lithologic oil-gas reservoir, and belongs to the field of oil gas geophysical prospecting projects. The method comprises the following steps: (1), obtaining intrinsic mode function components, and carrying out the reconstruction of a first original seismic signal, so as to obtain a first reconstructed original seismic signal; (2), carrying out the Hilbert transform, and calculating the instantaneous frequency, amplitude and phase corresponding to the intrinsic mode function component at each order; (3), repeatedly carrying out the steps (1)-(2) for a second original seismic signal, obtaining the instantaneous frequency, amplitude and phase of the second original seismic signal, and obtaining the instantaneous frequency, amplitude and phase of the intrinsic mode function component of an N-th original seismic signal in the above manner; (4), obtaining an instantaneous frequency profile; (5), obtaining an instantaneous amplitude profile; (6), obtaining an instantaneous phase profile. The instantaneous frequency profile, the instantaneous amplitude profile and the instantaneous phase profile are used for the recognition of a reservoir stratum of an oil-gas reservoir.
Description
Technical field [0001] The invention relates to the field of oil and gas geophysical prospecting engineering, in particular to a method for extracting instantaneous attributes of lithologic oil and gas reservoirs. Background technique [0002] In recent years, as the degree of exploration has increased, the key exploration targets have shifted from structural reservoirs to lithologic reservoirs. Compared with structural oil and gas reservoirs, lithologic oil and gas reservoirs have the characteristics of diverse reservoir types, rapid vertical and horizontal changes of sand bodies, and complex lithology, lithofacies, development degree and distribution characteristics of the reservoir. [0003] Seismic attribute technology is usually used when predicting lithologic oil and gas reservoirs. In the seismic attribute technology, the method of extracting seismic attributes is mainly to use some commercial software, such as interpretation software of Landmark and Schlumberger. However,...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & AuthorityPatents(China)
IPC IPC(8): G01V1/36
Inventor王孟华曹文俊辛玮江刘延利刘喜恒耿海燕周从安邢福松李宏为申军山黄新亚屈伟玉叶秋焱
OwnerPETROCHINA CO LTD