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Artificial long core and preparation method thereof

A long rock core and a technology for rock cores, which are applied in the field of artificial long rock cores and their preparation, can solve the problems that the length of artificial cores cannot meet actual needs, and achieve the effects of excellent core repeatability and simple manufacturing process.

Inactive Publication Date: 2014-04-23
NORTHEAST GASOLINEEUM UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the technical problem that the length of the existing artificial core is difficult to meet the actual demand, the present invention provides an artificial long core and its preparation method

Method used

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  • Artificial long core and preparation method thereof
  • Artificial long core and preparation method thereof
  • Artificial long core and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0022] Embodiment 1, mold is made up of side plate, end plate, bottom plate and pressure plate ( image 3 ), the bottom plate is bakelite, the pressure plate is high-density board, and the rest are carbon steel. There is a set of holes on the end faces of the two side plates, and the two side plates can be connected together by bolts. After the mold is installed, take 8500 grams of medium sand B and coarse sand A, mix them evenly, and then take 750 grams of epoxy resin and o-phthalic acid. 200 grams of dibutyl diformate, 50 grams of ethylenediamine and 500 grams of acetone, mix them evenly and pour them into the quartz sand, stir and sieve to ensure that the quartz sand and cement are mixed evenly, and then wipe the inside of the mold with acetone , put the mixture of quartz sand and cement into the mold, at this time, use the sand scraper to move back and forth in the horizontal direction in the mold, and finally use the pressure plate to compact the sand, put the filled mold...

Embodiment 2

[0023] Embodiment 2, mold is made up of side plate, end plate, bottom plate and pressure plate (see image 3 ), the bottom plate is bakelite, the pressure plate is high-density board, and the rest are carbon steel. There is a set of holes on the end faces of the two side plates, and the two side plates can be connected together with bolts. After the mold is installed, take 9000 grams of medium sand B and fine sand C, and then take 600 grams of epoxy resin and phthalic acid two 112 grams of butyl fat, 48 grams of ethylenediamine and 240 grams of acetone, mix well and pour into the quartz sand, stir and sieve to ensure that the quartz sand and cement are mixed evenly, wipe the inside of the mold with acetone, and then put the quartz sand The mixture of sand and cement is put into the mold. At this time, the sand scraper is used to move back and forth in the horizontal direction in the mold. Finally, the sand is compacted with the pressure plate. The filled mold is placed on the ...

Embodiment 3

[0024] Embodiment 3, mold is made up of side plate, end plate, bottom plate and pressure plate etc. (see image 3 ), the bottom plate and the pressure plate are hard miscellaneous wood, and the rest are carbon steel. There is a set of holes on the end faces of the two side plates. The two side plates can be connected together with bolts. After the mold is installed, take 9500 grams of coarse sand A and fine sand C respectively, and then add 300 grams of epoxy resin and phthalic acid 56 grams of dibutyl fat, 24 grams of ethylenediamine and 120 grams of acetone, mix them evenly and pour them into the quartz sand, stir and sieve to ensure that the quartz sand and the cement are mixed evenly. After wiping the inside of the mold with acetone, put The mixture of quartz sand and cement is put into the mold. At this time, the sand scraper is used to move back and forth in the horizontal direction in the mold. Finally, the sand is compacted with the pressure plate. The filled mold is p...

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Abstract

The invention relates to an artificial long core and a preparation method thereof. The problem that the length of the traditional artificial core is hard to satisfy experimental requirements is solved. The core comprises a quartz sand and a cement; and the preparation method comprises the following steps of: first, weighing the quartz sand and the cement according to requirements; uniformly mixing the quartz sand and the cement; putting a mixture into a square steel mold; pressing and drying the mixture by a pressure testing machine; slotting the mixture by a cutter; and finally, carrying out casting and sealing treatment on cutting joints and core appearance surface by using epoxy resins so as to obtain a core with permeability of 1mD-10000mD, wherein the slotted core is of long strip shape, 200-3000 cm long and 6.25-144 cm2 in section area; and the total pore volume of the long strip shaped core is 1000-50000 cm3. The pore structure of the core is similar to the pore structure of a natural sandstone reservoir core, the length of the core is far larger than the length (100 cm) of the traditional artificial core; and experiment requirements such as chemical flooding, dynamic polymer gel formation and the like can be satisfied.

Description

technical field [0001] The invention relates to a rock core used for evaluating seepage characteristics of oil field chemical displacement agents and optimizing injection parameters, and belongs to an artificial long rock core and a preparation method thereof. Background technique [0002] In the process of oil field development, chemical oil displacement agents play a very important role in improving the effect of water flooding development and enhancing oil recovery. There are often many oil displacement agent products with certain functions, which requires product optimization. The basis for product selection is its seepage characteristics in reservoir cores, that is, core displacement experiments are required. At present, due to the high price of natural cores and the limitation of sources and specifications, domestic research institutions mostly use artificial cores when conducting core displacement experiments. [0003] At present, there are several methods for makin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N1/28C04B26/10C04B41/48
Inventor 卢祥国金鑫
Owner NORTHEAST GASOLINEEUM UNIV