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Preparation method of drilling core containing acid liquor indicator

A technology of indicator and production method, which is applied in the preparation of test samples, manufacturing tools, ceramic molding machines, etc. problem, to achieve the effect of good instruction, easy operation and simple production method

Active Publication Date: 2012-05-30
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] For the multi-reservoir sandstone in Dagang Oilfield, acidizing measures also play a very important role in the production increase measures of Dagang Oilfield, and the annual workload is gradually increasing. For any block, as long as there is fluid entering from drilling to taking measures Carry out the compatibility test between the fluid entering the well and the natural core, and the natural core is a non-renewable resource, which is very precious. The general artificial core cannot guarantee the consistency with the real formation, and the compatibility test is not very effective, which leads to the targeted measures and validity cannot be guaranteed

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0010] Example 1: Guantao Formation Drilling Cuttings Core

[0011] Drilling cuttings preparation: The drilling cuttings raw material was cleaned with petroleum ether, and 80 grams of the processed cuttings were weighed.

[0012] Preparation of cement: weigh 14 grams of epoxy resin, 2 grams of ethylenediamine, 2 grams of acetone and 1 gram of methyl red.

[0013] Core preparation: put the drill cuttings in an oven at 95°C for 3 hours, add 1 gram of crystal violet after cooling.

[0014] Stir the cement and drilling cuttings evenly, put them into the mold and pressurize at 7Mpa to 10Mpa for 12 hours.

[0015] The mold was dismantled, the core was dried in an oven at 95°C for 6 hours, and cooled to room temperature naturally.

[0016] Obtain the drill cuttings core containing the acid liquid indicator, and the weight of the core is 100 grams.

Embodiment 2

[0017] Example 2: Shahejie Formation Drilling Cuttings Core

[0018] Drilling cuttings preparation: The drilling cuttings raw material was cleaned with petroleum ether, and 40 grams of the processed cuttings were weighed.

[0019] Preparation of cement: Weigh 7 grams of epoxy resin, 1 gram of ethylenediamine, 1 gram of acetone and 0.5 gram of methyl red.

[0020] Core preparation: Put the drill cuttings in an oven at 95°C for 3 hours, add 0.5 g of crystal violet after cooling.

[0021] Stir the cement and drilling cuttings evenly, put them into the mold and pressurize at 7Mpa to 10Mpa for 12 hours.

[0022] The mold was dismantled, the core was dried in an oven at 95°C for 6 hours, and cooled to room temperature naturally. Obtain the drill cuttings core containing the acid liquid indicator, and the core weighs 50 grams.

Embodiment 3

[0023] Example 3: Minghua formation drilling cuttings core

[0024] Drilling cuttings preparation: The drilling cuttings raw material was cleaned with petroleum ether, and 25 grams of the processed cuttings were weighed.

[0025] Preparation of cement: Weigh 4.375 grams of epoxy resin, 0.625 grams of ethylenediamine, 0.625 grams of acetone and 0.31 grams of methyl red.

[0026] Core preparation: Put the drill cuttings in an oven at 95°C for 3 hours, add 0.31 g of crystal violet after cooling.

[0027] Stir the cement and drilling cuttings evenly, put them into the mold and pressurize at 7Mpa to 10Mpa for 12 hours.

[0028] The mold was dismantled, the core was dried in an oven at 95°C for 6 hours, and cooled to room temperature naturally. Obtain the drill cuttings core containing acid liquid indicator, the core weighs 31 grams.

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PUM

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Abstract

The invention relates to a preparation method of drilling core containing acid liquor indicator, which comprises the following components as calculated by the total weight 100% of the drilling core: 14% of epoxy resin, 2% of quadrol, 2% of acetone and 1% of methyl red. The preparation method has the following steps: mixing the above components; weighting the rock waste raw material accounting for 14% of the total weight of the drilling core, and washing an performing oil treatment on the raw material by petroleum ether; drying for 3h under the temperature of 95 DEG C, cooling and adding 1% crystal violet; stirring a cementing agent with the rock waste raw material evenly, placing the mixture in a die and pressurizing by 7Mpa-10Mpa for 12h; and dismantling the die, drying the drilling core for 6h at the temperature of 95 DEG C, and naturally cooling to room temperature. The permeability, water sensitivity, salt sensitivity, velocity sensitivity, acid sensitivity and alkali sensitivity of the drilling core in the invention are similar to those of the natural core, which is proved by a stepped permeability tester and five-sensitivity tests; and the drilling core has good indicating effect on acid liquor.

Description

technical field [0001] The invention relates to a method for making rock cores in the fields of oilfield geology and chemistry, in particular to a method for preparing drill cuttings cores containing acid liquid indicators. Background technique [0002] For multi-reservoir sandstone in Dagang Oilfield, acidizing measures also play a very important role in the production increase measures of Dagang Oilfield, and the annual workload is gradually increasing. For any block, as long as there is fluid entering from drilling to taking measures, all need Carry out the compatibility test of the fluid entering the well and the natural core, and the natural core is a non-renewable resource, which is very precious, and the general artificial core cannot guarantee the consistency with the real formation, and the compatibility test is not very effective, resulting in targeted measures and effectiveness cannot be guaranteed. Contents of the invention [0003] The object of the present i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N1/28B28B3/00B28B11/24
Inventor 贾振福马超李春德段理胡成亮袁润成纪朝凤马先平魏玉莲张秀梅周爽
Owner PETROCHINA CO LTD