Blockage relieving agent capable of releasing heat and increasing energy, blockage relieving method, and injection device

Abstract

The invention provides a blockage relieving agent capable of releasing heat and increasing energy, a blockage relieving method, and an injection device. The blockage relieving agent capable of releasing heat and increasing energy comprises metal powder and solid nitric acid, and mass ratio of the metal powder to solid nitric acid ranges from 1:1 to 1:2. The blockage relieving agent capable of releasing heat and increasing energy also may comprise dehydrated crude and a metal ion stabilizing agent. The method also provides the heat-releasing energy-increasing blockage relieving method using the blockage relieving agent, and the injection device used for the heat-releasing energy-increasing blockage relieving method. The blockage relieving agent is capable of releasing heat energy and gas so as to realize heat and energy supplying on in-place oil via reaction of metal with acid solution, and at the same time, stratum blocking materials are dissolved by excess acid solution, and blockage relieving is realized.

Description

technical field [0001] The invention relates to a plugging-removing agent, a plugging-removing method and an injection device through exothermic and energy-enhancing reaction of metal and acid liquid, and belongs to the technical field of petrochemicals. Background technique [0002] When the oil development in the heavy oil block enters the middle and later stages, the formation pressure of the oil well formation will drop, resulting in insufficient driving force of the formation crude oil; the gradual decrease of the formation temperature will cause the viscosity of the crude oil to increase and the fluidity to deteriorate; colloidal asphaltenes, paraffins, etc. There are various problems such as precipitation and clogging of oil layer pores. Single heating, energy boosting or plugging removal measures can no longer solve the problem of low production in heavy oil blocks, and it is necessary to use compound plugging removal agents to solve this problem intensively. [000...

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Problems solved by technology

Such as the preparation method of thermochemical plugging removal oil well agent disclosed in patent CN94114175.6; a method of oil layer chemical generation and heat plugging removal disclosed in patent CN93120307.4; "Research and application of thermochemical oil layer plugging removal technology", Yang Jianhua, etc. "Xinjiang Petroleum Science and Technology", No. 2 (Volume 13), 2003: 22-24; "Research and Application of TKS Heavy Oil Formation Thermochemical Plugging Removal Agent", Xie Jianjun, etc., "Hannan Petroleum", October 1995, ninth Volume No. 4: 14-17 and other non-patent literature have mentioned this kind of use of NO 2 -1 with NH 4 + A method of generating a large amount of heat and nitrogen by reaction. Although this type of method can heat the formation and increase the formation pressure, it cannot handle some organic or inorganic formation plugs

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