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Heavy crude thermal recovery steamed well slag plugging agent

A technology for thermal recovery and steam injection of heavy oil, applied in the directions of drilling compositions, chemical instruments and methods, etc., can solve the problems of affecting the steam injection effect and the utilization rate of injected steam, and achieve good suspension stability, low operating cost, The effect of improving the curing strength

Active Publication Date: 2010-12-29
中国石油新疆油田分公司采油工艺研究院
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  • Summary
  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the process of heavy oil steam injection production, due to the heterogeneity of the formation and the fingering of high-temperature steam, the injected steam forms a channel in the formation, and steam channeling occurs, which affects the effect of steam injection and the injection of steam. Utilization of

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0018] Embodiment 1: Bentonite 6-8%, slag 20-30%, sodium hydroxide 0.5-1.0%, borax 0.5-2.0%, calcium chloride 0.5-1.0%, and the rest is water. All amounts are percentages by weight.

Embodiment approach 2

[0019] Embodiment 2: Bentonite 8%, slag 30%, sodium hydroxide 0.5%, borax 1.0%, calcium chloride 0.6%, and the rest is water. All amounts are percentages by weight.

[0020] The slag plugging agent of the present invention has been applied to high-temperature plugging measures for heavy oil thermal recovery steam injection reservoirs in Xinjiang Oilfield for more than 20 well times. From the field application, the plugging agent has simple preparation, stable performance and convenient construction. The amount of plugging agent is basically 15~200m 3 In between, the specific dosage can be adjusted according to the specific conditions of each well. The injection pressure during construction is generally between 2-10MPa, and the construction success rate is 100%. The invention effectively utilizes the slag, achieves a good plugging effect in field application, and achieves the purpose of the invention.

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Abstract

The invention relates to a thick oil thermal steam injection well slag blocking agent, which is prepared by the following components: 5-10 percent of suspension dispersant, 10-40 percent of slag, 0.3-2.0 percent of hydration activator, 0.5-3.0 percent of retarder, 0.5-2.0 percent of intensifier and the rest of water. The blocking agent is characterized by good suspension stability, low initial viscosity, easy pumping, high temperature resistance and high solidified strength, etc., and can meet the requirements for blocking off a steam escape channel in exploring oil reservoirs by thick oil steam. The blocking agent has simple preparation, convenient construction, low cost and high blocking strength, is safe and reliable, and achieves excellent blocking effect after the application in exploring oil reservoirs by thick oil steam for more than 20 times.

Description

Technical field [0001] The invention relates to a heavy oil thermal recovery steam injection well slag plugging agent, which is particularly suitable for plugging steam channeling channels in a heavy oil thermal recovery steam injection well. Background technique [0002] In the process of heavy oil steam injection exploitation, due to the heterogeneity of the formation and the fingering of high-temperature steam, the injected steam forms a channel in the formation, causing steam channeling, which affects the effect of steam injection and steam injection. Utilization rate. The plugging agents used in the past are mainly cement and organic resins to plug the steam channeling passages of high permeability layers and improve the development effect of heavy oil steam injection reservoirs. Blast furnace slag is the waste slag produced in the steelmaking process, the main composition is CaO, SiO 2 And Al 2 O 3 The specific surface area is larger and the density is lower than that of o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/46
Inventor 潘竟军邓伟兵李远林
Owner 中国石油新疆油田分公司采油工艺研究院
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