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High-temperature-resistant long-acting channeling sealing agent as well as preparation method and application thereof

A high-temperature-resistant and channel-blocking agent technology, which is applied in the field of high-temperature-resistant long-term channel-blocking agent and its preparation, can solve problems such as uneven air intake, large tail gas volume, and gas channeling, and achieves controllable crosslinking time and a preparation method Simple, good heat resistance

Active Publication Date: 2022-05-27
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the heterogeneity of the reservoir, there are serious problems such as uneven gas absorption and gas channeling in Liaohe fire flooding development
The current fire flooding production wells often use the general channeling sealing technology to reduce the permeability and tail gas volume of the gas-producing layer, and at the same time seal the non-gas channeling layer, which affects the productivity of the oil well
Due to the limitation of formation deficit and particle plugging agent injection, it is impossible to cooperate with sand packing and packer to seal channeling in layers. Therefore, it is necessary to develop a high-temperature resistant long-term plugging agent for fire flooding production wells to solve serious gas channeling in fire flooding reservoirs. Production problem with high exhaust gas volume

Method used

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  • High-temperature-resistant long-acting channeling sealing agent as well as preparation method and application thereof
  • High-temperature-resistant long-acting channeling sealing agent as well as preparation method and application thereof
  • High-temperature-resistant long-acting channeling sealing agent as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The present embodiment provides a high temperature resistant long-acting channeling agent, in percentage of mass, the raw material for preparing the high-temperature long-acting channeling agent comprises:

[0026] 5.5% blast furnace slag;

[0027] 0.6% fatty alcohol polyoxyethylene ether sodium sulfate;

[0028] 0.35% hydroxyethylene diphosphate;

[0029] 0.8% calcium carbonate;

[0030] 0.03% B Qing;

[0031] 0.04% sodium β-methylenedinaphthalonate;

[0032] 0.025% tetraethylene pentaamine;

[0033] 0.009% dodecyldimethylbenzyl ammonium chloride;

[0034] 0.01% sodium gluconate;

[0035] The margin is oilfield reinjected sewage.

[0036] The specific preparation process is:

[0037] (1) The blast furnace slag,, fatty alcohol polyoxyethylene ether sodium sulfate, hydroxyethylene diphosphate, calcium carbonate and ethellose components are added to the liquid mixing tank containing an appropriate amount of reinjected sewage, stirred at room temperature for 20 minutes;

[003...

Embodiment 2

[0066] The present embodiment provides a high temperature resistant long-acting channeling agent, in percentage of mass, the raw material for preparing the high-temperature long-acting channeling agent comprises:

[0067] 8% blast furnace slag;

[0068] 1% fatty alcohol polyoxyethylene ether sodium sulfate;

[0069] 0.5% hydroxyethylene diphosphate;

[0070] 1.5% calcium carbonate;

[0071] 0.04% B Qing;

[0072] 0.045% sodium β-methylenedinaphthalonate;

[0073] 0.035% tetraethylene pentaamine;

[0074] 0.015% dodecyldimethylbenzyl ammonium chloride;

[0075] 0.012% sodium gluconate;

[0076] The margin is oilfield reinjected sewage.

[0077] The specific preparation process is:

[0078] (1) The blast furnace slag, fatty alcohol polyoxyethylene ether sodium sulfate, hydroxyethylene diphosphate, calcium carbonate and ethyl qing components are added to the liquid mixing tank containing an appropriate amount of reinjected sewage, and stirred at room temperature for 30 minutes;

[007...

Embodiment 3

[0107] The present embodiment provides an example of a high temperature resistant long-acting channeling agent prepared in Example 2 applied in the deep sealing of the production well of a fire-flooded reservoir.

[0108] Specifically, taking the Du 84 production well Du H5 well in Liaohe Oilfield as an example, the well has a serious gas channeling phenomenon, with a daily output of 8256 Nm of exhaust gas 3 , the application effect becomes worse. In order to effectively control the adverse effects of the air channeling phenomenon, the well was sealed by fire flooding production.

[0109] The specific construction process includes: high temperature resistance long-term sealing agent dosage of 650m 3 , displacement of 12m 3 / h, the starting injection construction pressure is 5.2MPa, the construction pressure is slowly increased during the whole process, and the construction end pressure is 8.6MPa.

[0110] After the measure, the steam injection pressure increased by 2.8MPa, the vap...

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Abstract

The invention provides a high-temperature-resistant long-acting channeling sealing agent as well as a preparation method and application thereof. The invention discloses a preparation method of an anti-aging agent. The channeling sealing agent is prepared from the following raw materials: 4 to 8 percent of blast furnace slag, 0.5 to 1.5 percent of fatty alcohol polyoxyethylene ether sodium sulfate, 0.3 to 0.7 percent of hydroxyethylidene diphosphate, 0.5 to 2 percent of calcium carbonate, 0.02 to 0.06 percent of acetonitrile, 0.02 to 0.07 percent of beta-sodium methylene dinaphthalene sulfonate, 0.01 to 0.05 percent of tetraethylenepentamine, 0.006 to 0.018 percent of dodecyl dimethyl benzyl ammonium chloride, 0.008 to 0.015 percent of sodium gluconate and the balance of water. The channeling sealing agent can effectively seal a deep gas channeling channel of a stratum, has small damage to a non-gas channeling layer, realizes channeling sealing of any gas producing layer of a fireflooding producing well, and meets the high-temperature layered channeling sealing requirement of a fireflooding oil reservoir.

Description

Technical field [0001] The present invention belongs to the field of oil recovery technology, specifically relates to a high temperature resistant long-acting channeling agent and its preparation method and application. Background [0002] Fire flooding is one of the important core technologies for stable production and transformation of development methods in Liaohe Oilfield, up to now, there have been 188 fire-flooded well groups in Du 66 blocks, 3618 high blocks, 3 high blocks, etc., with an annual oil output of 470,000 tons. Due to the heterogeneity of the reservoir, the problems such as uneven suction and air channeling in the development of Liaohe Fire Flooding are serious. At present, fire-driven production wells often use general channeling technology to reduce the permeability and exhaust gas volume of the gas production layer, and at the same time, the non-air channeling layer is also blocked, which affects the production capacity of the oil well. Limited by the stratig...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/493C09K8/592C09K8/584E21B33/13E21B43/243
CPCC09K8/493C09K8/592C09K8/584E21B33/13E21B43/243Y02W30/50
Inventor 刘强安九泉张俊龙华张群李瑞马昌明王尧陈小凯匡旭光王磊魏冉孔令坤管紫君杨帆冯广慧
Owner PETROCHINA CO LTD
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