Built-in method of oil deposit physical model mineshaft

Abstract

The invention relates to a built-in method of an oil deposit physical model mineshaft, which adopts a mineshaft discretization thought to establish the mineshaft and comprises mineshaft model discretization and production of a physical model mineshaft. The mineshaft model discretization comprises the steps of firstly designing a well-shaped structure in the oil deposit physical experiment model, and dividing the mineshaft with the required well form into a plurality of small mineshaft segments in small rocks for producing a percolation model according to the discretization principle; and the method for producing the physical model mineshaft comprises the steps of producing the physical model mineshaft by the plurality of small rocks according to the discretization result, drilling on the selected small rocks to form segmented mineshafts, mutually splicing the small rocks to form a large-scale model and connecting all segmented mineshafts to form a complete mineshaft. The invention ensures that a great amount of small rocks with different drilling locations are spliced according to a certain order to form the mineshaft of any shapes, the mineshaft and the model are synchronously produced and the rock drilling process ensures the precision requirement for producing the mineshaft.

Description

technical field [0001] The invention belongs to the research on the physical experiment method of reservoir seepage in the field of oil and gas field development, in particular to a built-in method of a physical model wellbore of a reservoir, which is aimed at the research on seepage and development process of wells with complex structures; it is also applicable to other seepage phenomena related to porous media related research fields. Background technique [0002] In reservoir physical simulation, it is inevitable to make a wellbore model that meets the experimental requirements, especially due to the popularization and application of complex structure wells in oil and gas field development, higher requirements are put forward for reservoir model wellbore production technology. It is the development trend of oil and gas reservoir development well types in the future to increase the production of oil and gas wells by increasing the drainage area of ​​oil and gas wells with ...

AI Technical Summary

Problems solved by technology

There are two problems in man-made models and natural formation outcrop models using the drilling method to make wellbore. One is that tiny cracks may appear during the drilling process, which will affect the distribution of physical parameters of the model, and even make the model unusable. This method has great impact on drilling. The hole technology requirements are high; the second is that it is difficult to manufacture wells with complex structures under the existing technical conditions, such as multi-branch wells, fishbone wells and other complex structure wells

There are two problems in the method of pre-embedding the metal pipe to make the wellbore. One is that the material quality of the metal pipe is relatively high, and the drilling cost of the metal pipe is high, and the process of making a complex well-shaped wellbore structure is cumbersome; During the production and compaction process, problems such as deformation and hole blockage will occur, and the position of the metal pipe will deviate from the expected set position, thus affecting the law of oil-water movement

[0004] Based on the above analysis, the existing wellbore fabrication methods all have certain defects and cannot fully meet the needs of people's research, especially for complex well structures.

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