Full liquid phase airflow diversion agent for deep oil reservoir and preparation method of full liquid phase airflow diversion agent

A diverting agent and oil reservoir technology, applied in chemical instruments and methods, drilling compositions, etc., can solve the problems of easy plugging of steam injection pipe strings, poor temperature and salt resistance, small plugging radius, etc. Production effect, good temperature resistance, strong plugging strength and effect of temperature resistance

Active Publication Date: 2018-01-12
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the fact that the solid phase particles in the conventional chemical profile control are easy to block the steam injection pipe string, it often causes serious accidents such as overhaul, and there is a huge safety risk
[0004] The current diverting agents include inorganic type, polymer type, foam type, etc. Th...

Method used

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  • Full liquid phase airflow diversion agent for deep oil reservoir and preparation method of full liquid phase airflow diversion agent
  • Full liquid phase airflow diversion agent for deep oil reservoir and preparation method of full liquid phase airflow diversion agent
  • Full liquid phase airflow diversion agent for deep oil reservoir and preparation method of full liquid phase airflow diversion agent

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Embodiment 1

[0034] This embodiment provides a deep reservoir all-liquid gas flow diversion agent, which is composed of slug I, spacer fluid and slug II with a volume ratio of 25:60:15. in,

[0035] Taking weight percentage as 100%, the raw material composition of slug I includes:

[0036]

[0037] The spacer used is 0.3wt% sodium α-olefin sulfonate and 0.2wt% isomeric tridecyl alcohol polyoxyethylene ether, and the balance is water.

[0038] Taking weight percentage as 100%, the raw material composition of slug II includes:

[0039]

[0040] The above-mentioned all-liquid phase gas diversion agent in the deep part of the oil reservoir is prepared by the following steps:

[0041] Step 1: Add water glass solution, ammonium oxalate, glycerol polyoxyethylene ether, methoxypolyethylene glycol and ammonium chloride to liquid mixing tank A containing an appropriate amount of water in sequence, and stir at room temperature for 15 minutes to obtain slug I;

[0042] Step 2, adding sodium α...

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Abstract

The invention provides a full liquid phase airflow diversion agent for a deep oil reservoir and a preparation method of the full liquid phase airflow diversion agent. The diversion agent is prepared from a slug I, insulating liquid and a slug II, wherein the volume ratio of the slug I to the insulating liquid to the slug II is (15 to 30) to (45 to 73) to (12 to 25); the slug I is prepared from thefollowing raw materials: a water glass solution, ammonium oxalate, glycerol polyoxyethylene ether, methoxy polyethylene glycol, ammonium chloride and the balance of water; the insulating liquid is prepared from the following raw materials: alpha-sodium olefinsulfonate, iso-tridecanol polyoxyethylene ether and the balance of water; the slug II is prepared from the following raw materials: ammoniumcarbonate, lauryl alcohol polyoxyethylene, polyanionic cellulose, castor oil polyoxyethylene ether, polyethylene glycol and the balance of brine. The invention also provides the preparation method ofthe diversion agent. The diversion agent disclosed by the invention has good temperature resistance; in addition, the plugging strength can be controlled, the construction is safe and convenient, andblockage of a tubular column is avoided.

Description

technical field [0001] The invention relates to a diverting agent, in particular to an all-liquid-phase air diverting agent suitable for deep oil reservoirs, and belongs to the technical field of petroleum exploitation. Background technique [0002] With the continuous improvement of the development degree of steam flooding, the contradictions caused by the heterogeneity of the reservoir, the specific gravity and viscosity of oil, steam and water, such as steam overlay, fingering, steam channeling, and uneven effect between layers, will be directly reduced. steam flooding effect. [0003] At present, there are mainly two types of solutions, mechanical methods and chemical methods. Among them, the mechanical method generally adopts layered steam drive technology, which is mainly aimed at oil layers with well-developed interlayers to solve the problem in the near-wellbore zone; the chemical method generally adopts high-temperature Blocking the channeling channel can solve th...

Claims

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Application Information

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IPC IPC(8): C09K8/588C09K8/44C09K8/508
Inventor 刘强李瑞乞迎安郑猛杨开马昌明赵剑飞张俊刘恩宏樊瑞吕政杨贵容王俊良王佳昊刘可心邢盼盼解宇宁冯广慧
Owner PETROCHINA CO LTD
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