Novel foaming agent for fracture acidizing fluid

Abstract

The invention belongs to the technical field of oilfield chemical products, and particularly relates to a novel foaming agent for fracture acidizing fluid. The novel foaming agent comprises the following components in percentage by weight: 45-56% of sodium tetradecyl sulfonate and sodium hexadecyl sulfonate, 32-43% of octylphenol polyoxyethylene ether and nonylphenol polyoxyethylene ether, 8-18% of filth remover, 3-15% of shower gel and the balance of water. The novel foaming agent is prepared sequentially in proportion at normal temperature and atmospheric pressure, and is free from pollution of three wastes, low in cost, easily bought raw materials, simple in technology, and convenient to use. The novel foaming agent can be added into the fracture acidizing fluid, and has excellent foaming effect. According to the novel foaming agent, the main construction problem of well temperature (140DEG C below) in the oilfield acidizing fracture transformation can be solved.

Description

technical field [0001] The invention belongs to the technical field of oilfield chemical products, and in particular relates to a novel foaming agent used in fracturing acidizing fluid. Background technique [0002] In oil field acidizing and fracturing stimulation, in order to obtain the ideal effect of fracturing and acidizing stimulation, it is generally required that the active acid has a large range of action and extends as far as possible. Foam acid has the characteristics of slow speed, low liquid content, low fluid loss, and no pollution to oil layers, so it is widely used in oil layer stimulation in oil fields. [0003] In the foam acid, the key foaming agent (foaming agent), only with it can the acid be called foam acid. Its requirements are strong foaming ability, long half-life, small degree of emulsification, and good compatibility with various additives. An ideal blowing agent (foaming agent) must have the following properties: [0004] 1. It can effectively...

AI Technical Summary

Problems solved by technology

[0010] 7. Low adsorption capacity. The foaming agent should not be easily absorbed by the formation and always maintain a certain activity, which is conducive to the flowback of residual acid

[0011] At present, there are some foaming agents on the market, but their application has certain limitations, and most of them are single-component products.

Therefore, the selection of a foaming agent should be based on the molecular structure. However, a single molecular structure is difficult to meet the acidification foaming agent, and there is an urgent need for a foaming agent that meets multiple properties.