A kind of setting control composition, setting control agent and application thereof

Abstract

The present invention relates to a coagulation control composition, coagulation control agent and application thereof. The coagulation adjusting composition provided by the present invention mainly comprises gluconate, polyacrylate and ethylenediaminetetraacetate. By applying the setting modifier provided by the invention to the thermosetting resin cementing material system, the thickening time of the thermosetting resin cementing material at a temperature of 30 to 100° C. can be adjusted to exceed 150 minutes, and the safety cementing of medium and shallow oil and gas wells within 4000 m can be satisfied. need.

Description

technical field [0001] The invention relates to the field of oil and gas well cementing, in particular to a setting-adjusting composition, a setting-adjusting agent for thermosetting resin cementitious materials comprising the setting-adjusting composition, and applications thereof. Background technique [0002] With the increasing demand for clean energy in recent years, especially the continuous development of unconventional oil and gas fields such as shale gas, conventional oil well cement has also exposed its role in ensuring the structural integrity of oil and gas wells and adapting to small clearance environments. And the shortcomings of large-scale perforation and acid fracturing. For example, the volume shrinkage of the cement slurry makes the cementation of the cement sheath and the like cannot be guaranteed, and may also form micro-gap, causing formation fluid channeling. At the same time, the simulation study shows that gas channeling can occur when there is a mi...

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Problems solved by technology

[0004] Since the cementing operation process is to pump the resin gelling system into the casing through the surface pumping equipment to reach the bottom of the well, and then return to the wellhead or the predetermined position through the annular space between the casing and the well wall, so when the specified Before the position, the resin gelling system must maintain a liquid pumpable state, but the high temperature and high pressure environment in the well will cause the gelling system to coagulate rapidly and lose fluidity, so it is necessary to add a coagulation regulator to the resin gelling system to adjust the curing time

At present, the cementing retarders used in China mainly include lignosulfonate and its derivatives, hydroxycarboxylic acids, sugar compounds, cellulose derivatives, organic phosphonates, boric acid and inorganic acids, etc., but these retarders are all Unable to meet the site requirements of resin gelling system cementing

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