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Treating agent for inhibiting generation of hydrothion in oil reservoir in steam flooding injection well and application thereof

A treatment agent, hydrogen sulfide technology, applied in wellbore/well components, drilling compositions, chemical instruments and methods, etc., can solve problems affecting reservoir performance and other issues, and achieve the effect of cheap and easy-to-obtain raw materials

Active Publication Date: 2014-11-05
PETROCHINA CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the disadvantage of this method is that the formed metal sulfide may affect the storage performance of the reservoir, etc.
[0010] However, the methods for controlling hydrogen sulfide in oil wells recorded in the above-mentioned prior art all focus on "control". At present, there is no method to suppress the production of hydrogen sulfide from the source of the crude oil extraction process, so that hydrogen sulfide cannot be generated in the oil layer.

Method used

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  • Treating agent for inhibiting generation of hydrothion in oil reservoir in steam flooding injection well and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0036] See figure 1 As shown, the steam flooding injection well of this embodiment suppresses the treatment liquid delivery equipment for producing hydrogen sulfide in the oil layer, including:

[0037] A processing liquid storage container 1 for accommodating the processing liquid, in which a liquid level gauge 11 is arranged;

[0038]Treatment liquid delivery pipeline 2, one end of the pipeline is connected to the treatment liquid storage container 1, and the other end is used to communicate with the steam injection pipeline 5 of the steam flooding injection well; necessary valves 21 are also provided on the delivery pipeline;

[0039] Two plunger pumps 3 arranged in parallel on the conveying pipeline;

[0040] In addition, a check valve 4 is provided on the delivery line at the outlet of the plunger pump.

[0041] In Well Jin 45-024-K24, the steam injection rate is 108 tons / day, or 75 kg / min.

[0042] Sodium nitrate, sodium hydroxide and demineralized water are prepared ...

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Abstract

The invention provides a treating agent for inhibiting generation of hydrothion in an oil reservoir in a steam flooding injection well and application of the treating agent. The treating agent is a mixture of sodium nitrate, sodium hydroxide and water, wherein sodium nitrate serves as an oxidant to increase the valence of sulphur so as to avoid the generation of hydrothion; sodium hydroxide is used for stabilizing sulphur with increased valence so that the reaction for inhibiting generation of hydrothion is irreversible. The invention also provides application of the treating agent for inhibiting generation of hydrothion in the oil reservoir in the steam flooding injection well. In steam flooding, the treating agent is injected into stratum together with steam, thereby inhibiting generation of hydrothion in the oil reservoir at the source.

Description

technical field [0001] The invention relates to a treatment agent for steam flooding injection wells to suppress the generation of hydrogen sulfide in oil layers and its application, in particular to a chemical treatment agent for steam flooding injection wells to suppress the generation of hydrogen sulfide from the source, and the use of The treatment agent suppresses the generation of hydrogen sulfide in the oil layer. Background technique [0002] Hydrogen sulfide is a colorless gas with a specific gravity of 1.1895, which is heavier than air. At room temperature, the solubility of hydrogen sulfide in water is 3.864g / L, and the solubility in oil is 3.3g / L. The solubility is even greater under high pressure. When people inhale high concentration (1500mg / m 3 above), the poisoned person will quickly lose consciousness, accompanied by violent convulsions, momentary breathing stop, and then heartbeat stop, which is called "lightning type" death. In addition, hydrogen sulfide...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/592E21B43/24
Inventor 高玉军马春宝向延安徐恩宽潘恩林胡贺元罗艳红王洋文健陈素娟
Owner PETROCHINA CO LTD
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