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A kind of coring method of oil sand core

A technology for oil sandstone and rock core, applied in the direction of sampling device, etc., can solve the problems of inability to meet the requirements of batch coring, shortening the coring time, low coring efficiency, etc., and achieves the effects of high coring efficiency, low cost and simple structure

Active Publication Date: 2017-06-23
CHINA UNIV OF PETROLEUM (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problems in the prior art, the present invention provides a coring method for oil sand cores, the purpose of which is to solve the problems of low coring efficiency, high labor costs and Unable to meet the problem of batch coring, it can effectively shorten the coring time and reduce labor costs without affecting the quality of coring, and can meet the requirements of automatic or semi-automatic batch coring

Method used

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  • A kind of coring method of oil sand core
  • A kind of coring method of oil sand core
  • A kind of coring method of oil sand core

Examples

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Effect test

Embodiment 1

[0070] Such as figure 1 Shown, according to an embodiment of the coring method of the oil sand core of the present invention, it comprises the following steps in sequence:

[0071] Step 1: Place the in-situ core on a horizontal plane;

[0072] Step 2: Coating a layer of lubricating oil on the inner wall of the core barrel, and contacting the blade-shaped end of the core barrel with the upper end surface of the in-situ rock core;

[0073] Step 3: Press the core barrel first, and then use a vertical cutter to cut the in-situ rock core outside the core barrel along the blade-shaped end of the core barrel;

[0074] Step 4: Repeat Step 3, pressing and cutting intersect until the blade-shaped end of the core barrel reaches the lower end surface of the in-situ core;

[0075] Step 5: Use a horizontal cutter to cut off the rock core exposed at both ends of the core barrel;

[0076] Step 6: Place the coring column under the blade-shaped end of the coring barrel, and push the coring b...

Embodiment 2

[0080] According to another embodiment of the coring method of the oil sand core of the present invention, its steps, the coring principle and the coring device of the oil sand core used are all the same as the first embodiment, the difference is: in the oil sand core In the coring device, the core cylinder is made of aluminum alloy. The overall height of the core cylinder is 50mm, the outer diameter is 30.5mm, the inner diameter is 25.5mm, and the wall thickness is 2.5mm. One end of the core cylinder is blade-shaped. The height is 10mm. The core column is made of aluminum alloy material, the height of the core column is 50mm, and the diameter is 25mm.

Embodiment 3

[0082] According to another embodiment of the coring method of the oil sand core of the present invention, it comprises the following steps in sequence:

[0083] Step 1: Place the in-situ core on a horizontal plane;

[0084] Step 2: Coating a layer of lubricating oil on the inner wall of the core barrel, and contacting the blade-shaped end of the core barrel with the upper end surface of the in-situ rock core;

[0085] Step 3: Press the core barrel first, and then use a vertical cutter to cut the in-situ rock core outside the core barrel along the blade-shaped end of the core barrel;

[0086] Step 4: Repeat Step 3, pressing and cutting intersect until the blade-shaped end of the core barrel reaches the lower end surface of the in-situ core;

[0087] Step 5: Use a horizontal cutter to cut off the rock core exposed at both ends of the core barrel;

[0088] Step 6: Place the coring column under the blade-shaped end of the coring barrel, and push the coring barrel downward, and ...

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Abstract

The invention discloses a coring method for oil sand cores. The sequence is as follows: a layer of lubricating oil is coated on the inner wall of the core cylinder, and the blade-shaped end of the core cylinder is connected to the upper surface of the core in situ. End-face contact; press the core barrel, and cut the in-situ rock core outside the core barrel with a vertical cutter along the blade-shaped end of the core barrel; use a horizontal cutter to cut off the core exposed at both ends of the core barrel; The coring column is placed under the blade-shaped end of the coring barrel, and the coring barrel is pushed down, and the coring column pushes the oil sand core out of the coring barrel. The coring method uses a coring device for oil sand cores. The device includes an in-situ rock core, a horizontal cutter, a vertical cutter, a coring barrel and a coring column. One end of the coring barrel is in the shape of a blade. The core barrel and the vertical cutter work together to cut the in-situ rock core. The coring method has high coring efficiency and low cost, and can be operated by a control system to make the coring process more accurate, and the prepared oil sand core has a complete shape and is suitable for triaxial experiments.

Description

technical field [0001] The invention belongs to the technical field of petroleum drilling, and in particular relates to a coring method for oil sand cores. Background technique [0002] Oil sand is an unconventional crude oil-bearing sandy deposit composed of sand, bitumen, minerals, clay and water combined with each other. The general term for the mixture formed, the composition of oil sands in different regions is different, among which bitumen is the main component, and its content accounts for 1-20%. Oil sands are also known as tar sands, heavy oil sands, heavy oil sands or tar sands. [0003] Oil sand is loose and soft, and it is easy to scatter when taking cores, and it is not easy to form. So far, there is no good technology for producing oil sand cores. At present, liquid nitrogen coring technology is usually used to obtain core samples from oil sands. During the whole coring process, the oil sands are kept in a hard frozen state by liquid nitrogen to maintain the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N1/08
Inventor 林伯韬高彦芳金衍庞惠文
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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