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Clay stabilizer special for huff and puff of rocket power compound heat carrier

A composite heat carrier and clay stabilizer technology, which is applied in the field of clay stabilizers, can solve the problems of poor compatibility, reduced permeability, and reduced permeability, and achieve the effects of good temperature resistance and good compatibility

Inactive Publication Date: 2012-12-26
PETROCHINA CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the water vapor in the rocket-powered composite heat carrier is likely to cause water-sensitive reservoir clay to expand, particle breakage and migration, etc., which will damage the reservoir of low-permeability reservoirs and reduce permeability, clay stabilizers are used to improve water-sensitive reservoir clay. It is one of the best ways for swelling and particle crushing and migration, but the existing clay stabilizer formulation system has poor compatibility with weakly acidic high-temperature fluids, and the anti-swelling effect cannot reach the corresponding economic and technical indicators in a high-temperature environment. Effectively prevent the expansion of clay in the oil layer and the migration of clay particles, so that the permeability of some low-permeability oil layers is further reduced, and the injection of clay stabilizer is difficult

Method used

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  • Clay stabilizer special for huff and puff of rocket power compound heat carrier
  • Clay stabilizer special for huff and puff of rocket power compound heat carrier

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0014] Example 1: the preparation of clay stabilizer:

[0015] Use trimethylamine quaternary ammonium salt, ammonium chloride, ethanol and water in a mass ratio of 1.5:3:1.5:94 to prepare a special clay stabilizer for rocket power composite heat carrier throughput, specifically: add trimethylamine to the water according to the above ratio For quaternary ammonium salt, add trimethylamine quaternary ammonium salt and stir at high speed until it is evenly mixed, then add ammonium chloride and ethanol in proportion, and stir at high speed to make a mixed solution, which is a special clay stabilizer for rocket power composite heat carrier huffing and puffing.

Embodiment 2

[0016] Embodiment 2: clay stabilizer temperature resistance performance experiment:

[0017] The experimental method is: use trimethylamine quaternary ammonium salt, ammonium chloride, ethanol and water at a mass ratio of 1:2:1:96 to prepare a special clay stabilizer for rocket power composite heat carrier throughput, and place the clay stabilizer at 300 °C In the oven, heat for 48 hours, and observe whether there is precipitation, turbidity, etc. in the sample added with the clay stabilizer. The experimental results are shown in the table below:

[0018] Table 1 Experimental results of temperature resistance performance test

[0019]

[0020] From the experimental results, it can be seen that the clay stabilizer aging solution for rocket power composite heat carrier has no precipitation, no turbidity, and good temperature resistance.

Embodiment 3

[0021] Embodiment 3: the performance measurement of special clay stabilizer for rocket power composite heat carrier:

[0022] The experimental method is: accurately weigh 5.000g of rock powder and pour it into the measuring cylinder, pressurize at a predetermined pressure for 5 minutes, and then measure the core height H 0 ;Install the measuring cylinder with the pressed core on the main body of the shale expansion tester, adjust the adjusting nut so that the initial expansion height of the rock column is displayed as 0.00mm; Ammonium, ethanol and water mass ratio of 1.5:3:1.5:94 prepared rocket power composite heat carrier clay stabilizer solution, start the recorder, when the expansion height is stable, record the core expansion height H 1 ;Calculate expansion rate: B=[H 1 / H 0 ]×100%. The experimental results are shown in the table below:

[0023]

[0024] It can be seen from the experimental results that the anti-swelling rate of the special clay stabilizer for roc...

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Abstract

The invention discloses a clay stabilizer special for huff and puff of a rocket power compound heat carrier. The clay stabilizer resolves the problem that an existing clay stabilizer is bad in performance in a high temperature environment. The clay stabilizer comprises, by weight, 1.0-1.5% of trimethylamine quaternary ammonium salt, 2-3% of ammonium chloride, 1.0-1.5% of ethyl alcohol, and the balance water. The formula system of the clay stabilizer is good in temperature resistant performance, the clay stabilizer is good in compatibility with steam, the high-temperature component in the rocket power compound heat carrier, and the adaptive stratum temperature can be up to 300 DEG C.

Description

technical field [0001] The invention relates to a clay stabilizer in the field of oil recovery, in particular to a clay stabilizer specially used for rocket power composite heat carrier throughput. Background technique [0002] Since 2005, Daqing Oilfield has carried out field tests of rocket-powered composite heat carrier huff and puff on more than 90 wells in the Toutai heavy oil block and the Lasa Xing transition zone, and achieved good economic and social benefits. Since the water vapor in the rocket-powered composite heat carrier is likely to cause water-sensitive reservoir clay to expand, particle breakage and migration, etc., which will damage the reservoir of low-permeability reservoirs and reduce permeability, clay stabilizers are used to improve water-sensitive reservoir clay. It is one of the best ways for swelling and particle crushing and migration, but the existing clay stabilizer formulation system has poor compatibility with weakly acidic high-temperature flu...

Claims

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Application Information

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IPC IPC(8): C09K8/42
Inventor 王贤君王海静刘向斌韩重莲孙国辉周泉王力
Owner PETROCHINA CO LTD