Basalt reservoir crack distinguishing method and device

A technology for basalt and fractures, applied in earthwork drilling, wellbore/well components, measurement, etc., can solve problems such as difficulties and differences in identifying fractures in basalt reservoirs

Pending Publication Date: 2022-07-08
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In the actual oilfield development process, it is difficult to use conventional logging data to identify fractures in basalt reservoirs, resulting in a large difference between logging interpretation conclusions and oil testing results

Method used

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  • Basalt reservoir crack distinguishing method and device
  • Basalt reservoir crack distinguishing method and device
  • Basalt reservoir crack distinguishing method and device

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Embodiment Construction

[0048] In order to make the objectives, technical solutions and advantages of the present application clearer, the embodiments of the present application will be further described in detail below with reference to the accompanying drawings.

[0049] figure 1 This is a flow chart of a method for judging fractures in a basalt reservoir provided by the embodiment of the present application. see figure 1 , this embodiment includes:

[0050]Step 101: Obtain the spontaneous potential value, deep resistivity value, medium resistivity value, shallow resistivity value and compensation density value corresponding to the basalt reservoir in the target productivity well.

[0051] During the implementation, technicians can perform natural gamma logging, spontaneous potential logging, resistivity logging and density logging on the target productivity well, and obtain the natural gamma value, Self-potential value, deep resistivity value, medium resistivity value, shallow resistivity value...

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Abstract

The invention discloses a basalt reservoir crack judgment method and device, and belongs to the field of petroleum logging. The method comprises the following steps: acquiring a natural potential value, a deep resistivity value, a medium resistivity value, a shallow resistivity value and a compensation density value corresponding to each depth of a basalt reservoir in a target productivity well; acquiring a rock skeleton density value corresponding to the basalt reservoir; according to the natural potential value, the deep resistivity value, the medium resistivity value, the shallow resistivity value, the compensation density value and the rock skeleton density value, the crack of the basalt reservoir section is judged. According to the method and the device, the crack of the basalt reservoir can be accurately judged.

Description

technical field [0001] The present application relates to the technical field of petroleum logging, and in particular, to a method and device for judging fractures in basalt reservoirs. Background technique [0002] Due to the influence of ancient structures and sedimentary environment, the basalt reservoirs in the third member of Shahejie Formation in some domestic oilfields are stable and widely distributed. In actual oilfield exploitation, the liquid production of basalt reservoirs mainly manifests as high production, low production or no liquid production. For basalt reservoirs where fractures are not developed, there is no natural productivity. Even if fracturing is adopted, the fluid production is still extremely low. For basalt reservoirs with a single or a small number of fractures, the natural productivity is extremely low or no fluid, and the fluid production decreases rapidly after fracturing, often resulting in insufficient fluid supply in the short term. Howev...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B49/00E21B47/00
CPCE21B49/00E21B47/00Y02A90/30
Inventor 林学春孟立新王东林李云鹏张祝新姜玲玲贾晨周莹谢菲马东博王雅静刘璐
Owner PETROCHINA CO LTD
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