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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 direction of drilling composition, chemical instruments and methods, etc., can solve the problems affecting the steam injection effect and injection steam utilization rate, achieve good suspension stability, low operating cost, The effect of improving the curing strength

Active Publication Date: 2009-01-28
中国石油新疆油田分公司采油工艺研究院
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  • Abstract
  • Description
  • Claims
  • 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: 6-8% of bentonite, 20-30% of slag, 0.5-1.0% of sodium hydroxide, 0.5-2.0% of borax, 0.5-1.0% of calcium chloride, and the rest is water. All amounts are in percent by weight.

Embodiment approach 2

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

[0020] The slag plugging agent of the present invention has been applied to more than 20 wells of high-temperature plugging measures for steam injection reservoirs of heavy oil thermal recovery in Xinjiang Oilfield. From the field application point of view, the plugging agent is simple to prepare, stable in performance and convenient in construction. The amount of plugging agent is basically 15-200m 3 The specific dosage can be adjusted according to the specific conditions of each well. The injection pressure during construction is generally between 2 and 10 MPa, and the construction success rate is 100%. The invention effectively utilizes the slag, achieves a good plugging effect in field application, and realizes 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 slag plugging agent for thermal recovery and steam injection wells of heavy oil, in particular to a slag sealing agent for thermal recovery and steam injection wells of heavy oil, which is suitable for sealing off steam channeling channels in steam injection wells for thermal recovery of heavy oil. Background technique [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 rate. In the past, mainly cement and organic resin plugging agents were used to block the steam channeling channels in 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, and i...

Claims

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Application Information

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Patent Type & Authority Applications(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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