Acidifying unblocking liquid for unblocking stratum of water injection well

A technology for water injection wells and formations, applied to drilling equipment, etc., can solve the problems of high effective concentration of nitric acid, low cost, slow corrosion of oil pipes, etc., achieve high effective concentration of nitric acid, excellent corrosion inhibition performance, and ensure construction safety.
CN1488704AInactive Publication Date: 2004-04-14计万军
0 Cites 10 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
计万军
Publication Date
2004-04-14
Estimated Expiration
Not applicable · inactive patent

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
Patent Text Reader

Abstract

The composition of the invented acidization blocking remover liquor comprises (wt%) 3%-20% of industrial nitric acid, 0.8%-1.2% of nitric acid acidization additive and the rest is water, and the nitric acid acidization additive is formed from metal corrosion inhibitor and surfactant. Said invention can completely eliminate the near-well-bore area block of wall injection well, and has the characteristics of slow oil pipe corrosion speed, high nitric acid effective concentration, easy preparation and low cost.
Need to check novelty before this filing date? Find Prior Art

Description

Technical field:

[0001] The invention relates to an oilfield chemical agent used in the technical field of chemical plugging removal for oil and water wells in oil fields, and belongs to the acidification plugging removal fluid for plugging water injection well formations. Background technique:

[0002] In the process of crude oil exploitation, the strata near the wellbore of the water injection well are polluted and clogged, and the water injection pressure is high. Commonly used are earth acid acidizing liquid or hydrochloric acid acidizing liquid. When earth acid acidizing liquid or hydrochloric acid acidizing liquid is used for operation, the effect of penetrating and dissolving blockages is poor, and the effective period of acidizing is short, and the scale of acid liquid used in repeated acidizing must be larger than The large scale of the previous operation was effective, mainly because the acid solution was consumed quickly and the residual liquid after reacting with...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More