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A reagent and application and equipment for detecting whether an oil layer enters a high-temperature oxidation stage

A technology of high-temperature oxidation and reagents, which is applied in wellbore/well parts, earthwork drilling and production, etc., can solve the problems of increased difficulty in secondary ignition, non-reusable use, and increased difficulty in ignition, so as to facilitate on-site analysis, high temperature The effect of short oxidation combustion cycle and increased difficulty

Active Publication Date: 2017-10-17
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is impossible to judge whether the oil layer is ignited and achieves high-temperature oxidation combustion. It can only be inferred by analyzing the gas injection temperature at the bottom of the injection well and the composition of the combustion tail gas adjacent to the well. The difficulty of re-ignition increases, and it brings certain economic losses
[0007] (2) Impact on production regulation
In the second ignition, the required temperature is higher, and the difficulty of ignition is greatly increased
And long air injection is also a waste
[0009] In addition, there is only one oil pipe in the heavy oil well string in the prior art, such as Figure 4 As shown, for injecting air, the temperature measurement cable is bundled outside the oil pipe, which cannot be pulled out and reused, and there is a certain waste of resources; Elongation, the elongation of the cable and the oil pipe is different, it is easy to break the temperature measuring cable

Method used

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  • A reagent and application and equipment for detecting whether an oil layer enters a high-temperature oxidation stage
  • A reagent and application and equipment for detecting whether an oil layer enters a high-temperature oxidation stage
  • A reagent and application and equipment for detecting whether an oil layer enters a high-temperature oxidation stage

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0074] 15 Preparation of N-labeled ammonium perchlorate:

[0075] Using HClO as the starting material, high-purity HClO is obtained through two-step electrolysis 4 , and then tagged with 15 N high-purity ammonia (commercially available, product model NLM-107-1-BS) was reacted to obtain high-purity labeled ammonium perchlorate after centrifugation and drying. Specifically:

[0076] commercially available 15 NH 3 ·H 2 O, concentration 25%-28%, commercially available HClO 4 , Concentration 70%-72%.

[0077] The first step: according to 15 NH 3 ·H 2 O and HClO 4 The molar concentration ratio (without water) is 1:1 and mixed in a container.

[0078] Step 2: Evaporate water in the evaporating pan under normal pressure to form 15 NH 4 ClO 4 solid, obtained 15 NH 4 ClO 4 The solid can be directly crushed in the next step without special treatment. Prepared 15 The mass spectrum of N-labeled ammonium perchlorate is as follows figure 1 shown.

[0079] The third ste...

Embodiment 2

[0096] This embodiment prepares ammonium perchlorate granule according to embodiment 1, and adds Gd 2 o 3 , the Gd 2 o 3 Consumption is 5% of the total weight of ammonium perchlorate. One of the rare earth metals is gadolinium.

[0097] It is prepared as: NH in the ratio of the amount of substance in gadolinium chloride solution 4 HCO 3 :GdC1 3 =2.8 Add ammonium bicarbonate solution for precipitation, heat-age the obtained gadolinium carbonate suspension in a water bath at 50°C for 4 hours to make gadolinium carbonate become crystalline precipitate, continue to add ammonium bicarbonate solution under stirring until gadolinium precipitation is complete , continued to age for 30 minutes, filtered, washed, and calcined at 800°C for 1 hour to obtain gadolinium oxide.

[0098] According to Gd 2 o 3 Consumption is 5% of the total weight of ammonium perchlorate, Gd 2 o 3 Mix evenly with the ammonium perchlorate granules prepared in Example 1.

Embodiment 3

[0100] In this example, ammonium perchlorate granules were prepared according to Example 1, and nitrocellulose was coated on the outside of the granules. Wherein the mass of nitrocellulose accounts for 0.02% of the total mass of the reagent.

[0101] Described nitrocellulose is coated outside ammonium perchlorate particle according to following method:

[0102] (1) Add nitrocellulose to silane coupling agent KH-550 to prepare a solution with a mass percentage of 3%, then add a mixed solution of ethanol and acetone, the volume ratio of ethanol and acetone is 1:1, stir evenly, and fully dissolve After obtaining the nitrocellulose solution, the volume ratio of the mixed solution of ethanol and acetone to the silane coupling agent solution of the nitrocellulose is 1:25;

[0103] (2) Add the dried ammonium perchlorate granules and the nitrocellulose solution prepared in step (1) into a kneader for thorough mixing at 20°C, and then dry them in an oven at 30-40°C for 24-28 hours to ...

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Abstract

The invention relates to a reagent, application and equipment for detecting whether an oil layer enters a high-temperature oxidation stage or not, in particular to a reagent, application and equipment for detecting the temperature of the oil layer through N isotope marked ammonium perchlorate. The reagent comprises N isotope marked ammonium perchlorate. The ammonium perchlorate is particles. The particle size of the ammonium perchlorate is smaller than 10 micrometers, and preferably is smaller than 2.5 micrometers and larger than 1 micrometer. Preferably, the N isotope is 15N. The technology is simple, whether the high-temperature oxidation burning cycle is short or not is judged, on-site analysis is facilitated, if ignition fails, secondary ignition is carried out immediately, the phenomenon that the difficulty of secondary ignition is increased due to the fact that time is too long is avoided, and meanwhile unnecessary waste is reduced.

Description

technical field [0001] The invention relates to a reagent, application and equipment for detecting whether an oil layer has entered a high-temperature oxidation stage, in particular to a reagent, application and equipment for detecting the temperature of an oil layer with N isotope-labeled ammonium perchlorate. Background technique [0002] Combustion of oil reservoirs is an effective enhanced oil recovery technology, and it is also one of the important technologies for the transformation of heavy oil thermal recovery. The incineration oil layer burns partially cracked heavy oil to produce light oil, and the recovery rate is very high, which can reach more than 80%. [0003] There are many reactions in the burning process, including thermal cracking, physical distillation, etc., but only two reactions are involved in oxygen: ①Oil+O 2 →C x h y o z → Coke (oxygenation reaction, that is, low-temperature oxidation reaction), the crude oil will continue to thicken during the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B49/00
Inventor 张洪君张守军彭松良曲绍刚于晓聪阚长宾
Owner PETROCHINA CO LTD
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