Core confirming method for development degree of reservoir cracks

A technology for fracture development and determination method, applied in the field of fracture description, can solve problems such as difficult research and complex fracture distribution, and achieve good results

Active Publication Date: 2017-08-18
CHINA NAT OFFSHORE OIL CORP +1
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  • Abstract
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Problems solved by technology

However, due to the extremely complex distribution of fractures, the research is difficult, and their description and prediction are difficult and hot spots in the petroleum industry.

Method used

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  • Core confirming method for development degree of reservoir cracks
  • Core confirming method for development degree of reservoir cracks

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Embodiment Construction

[0023] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments. However, it should be understood that the accompanying drawings are provided only for better understanding of the present invention, and they should not be construed as limiting the present invention.

[0024] The present invention provides a rock core determination method for the development degree of reservoir fractures, which comprises the following steps (taking the rock core of the 1750.00-1758.50m depth section of the P oilfield as an example):

[0025] 1) Core splicing

[0026] The relative position relationship when splicing the broken core blocks to restore the position of the core blocks to the original state underground:

[0027] ① if figure 1 As shown, count the number of core blocks in the core box and make a record;

[0028] ②According to the depth of the core, from deep to shallow, arrange the rock blocks in order;

[0029] ③ if fig...

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Abstract

The invention relates to a core confirming method for the development degree of reservoir cracks. The method comprises the following steps: 1) jointing cores; 2) summarizing and recognizing the characteristics of natural cracks; 3) performing imaging logging calibration; 4) finally confirming the natural cracks; and 5) judging the development degree of the cracks. The invention is specific to the reservoir cracks; the natural cracks are confirmed according to two data of the core and imaging logging, so that the confirmation of the natural cracks is more objective; furthermore, the splicing resetting is performed on the core fragments according to the invention, so that the quantity statistics of the natural cracks of the core can more objectively reflect the quantity of practical reservoir cracks, especially, the reservoir with abnormal development of the cracks and serious core segment; the method has a better effect; besides, the development degree of reservoir cracks confirmed according to the invention can avoid the common industrial misunderstanding that a same crack is mistakenly recorded as multiple cracks under the influence of mutual cutting of the cracks.

Description

technical field [0001] The invention relates to a method for describing fractures, in particular to a method for determining the development degree of fractures in a rock core. Background technique [0002] Domestic research on fractured reservoirs has a history of several decades. Before the 1990s, it was basically limited to traditional geological methods, and only studied fracture identification methods from the data of the wellbore itself; while in the world, major oil companies A large number of researches on cracks have been or are being carried out. In recent years, PetroChina Research Institute of Exploration and Development has formed a multidisciplinary fracture research project team including experts in geology, logging, seismic and reservoir engineering. By summarizing the exploration and development practices of more than ten fractured reservoirs at home and abroad, exploring A set of comprehensive geological evaluation techniques for fracture identification an...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N33/24
CPCG01N33/24
Inventor 宋来明范廷恩余连勇胡光义梁旭刘振坤张雨晴陈飞陆大文汤婧王帅田禀睿商志垒
Owner CHINA NAT OFFSHORE OIL CORP
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