CN1244566A

CN1244566A - Synthesis of efficient composite unblocking agent for oil and water well

Info

Publication number: CN1244566A
Application number: CN 99113191
Authority: CN
Inventors: 张安民; 王莉
Original assignee: Individual
Current assignee: Individual
Priority date: 1999-08-19
Filing date: 1999-08-19
Publication date: 2000-02-16

Abstract

The composite unblocking agent of the present invention is used for oil exploiting well and water-injecting well to increase oil yield and injected water amount through unblocking. It is compounded with organic acid, organic solvent, surfactant and other treating agents in certain proportion. The unblocking agent compounded based on the said method can acidity oil resevoirs to raise penetration coefficient, dissolve asphalt, colloidal matter, wax and other organic matters to increase the flowability of petroleum, inhibit the expansion of clay in oil reservoirs and dissolve scale so as to increase oil yield and injected water amount obviously.

Description

High efficiency compound oil, well unblocking agent synthetic method

The present invention relates to a kind of synthetic method that is used for the efficient composite blockage relieving agent of oil well, water injection well plugging removal and stimulation, augmented injection.

Producing well, water injection well are in exploitation, the injecting process, and reasons such as, clay swelling poor owing to reservoir permeability migrated, organic obstruction often cause oil layer blocking, thereby cause rapid reduction of oil well output or water injection well injection rate to descend.At the problems referred to above, the scene has been taked such as acidifying, has been marked with machine solvent and promoting agent well-flushing or utilizes multiple de-plugging measures such as oil reservoir treatment agent, and has obtained effect in various degree.But because of the most of effects of unblocking agent of present rig-site utilization single, though it is compound unblocking agents that some unblocking agents are arranged, but because of having ignored the compatibleness problem between fluid and the reservoir, between the different fluid, even certain product in quality with technical all are good products of a kind of excellent property, do not reach ideal effect and use at the scene, limited to thereby apply.

The object of the present invention is to provide a kind ofly act on comprehensively, the synthetic method of obvious results high efficiency compound oil, well unblocking agent.

Task of the present invention is to realize like this.High efficiency compound oil provided by the present invention, well unblocking agent synthetic method are with organic acid, organic solvent and tensio-active agent, other treatment agents, are combined into efficient unblocking agent according to a certain ratio.Implementation step is as follows:

1, obtains mixed organic acid.The waste liquid (being commonly called as " sour water ") that the mixed organic acid that this unblocking agent synthetic method is adopted can adopt oil chemistry factory to utilize in actually operating to produce in the liquid wax saponification reaction synthetic detergent powder process.This sour water contains the organic acid and the multiple organism composition of proportional higher (effective concentration 18--20%), and the result is as follows in its gas chromatographic analysis:

First, second, propionic acid 42--45%;

First, second, propyl group furanone 11--13%;

Propylene, iso-butylene 31--33%;

Ethanol 2.0--2.5%;

Other promoting agents 7.0--7-5%

Wherein, first, second, propionic acid relative proportion are 1: 2: 1; First, second, propyl group furan

The ketone relative proportion of muttering is 2: 1: 1:; Propylene, iso-butylene relative proportion are 1: 1:.

2, add organic solvents such as ketone, aldehyde, alcohol.According to actual needs such as oil well crude oil property and oil layer blocking situations, add corresponding organic solvent.Its addition and concrete reaction conditions are: adding weight is ethanol, acetone or the formaldehyde of a sour water weight 10%, is catalyzer (consumption 0.5--1 ‰) reaction 8--12 hour with potassium permanganate under 40--70 ℃ of condition;

3,, introduce the small molecules positively charged ion by the oxidation addition reaction.Its addition and concrete reaction conditions are: adding weight is the ammonium chloride of a sour water weight 5%, under 40--50 ℃ of condition, reacts 6--8 hour, can obtain this high efficiency compound oil well unblocking agent.

High efficiency compound oil well unblocking agent synthetic method cost provided by the invention is low, technology is simple, easy to implement, use the both acidificable reservoir of this method synthetic unblocking agent, improve rate of permeation, organism such as solubilized bituminous matter, colloid, wax again, strengthen crude oil fluidity, also can suppress reservoir clay swelling, dissolution of scale, can obtain significant volume increase, augmented injection effect, be suitable for and apply.

Embodiment 1: get sour water 100KG one time, add the 10kg industrial alcohol, be heated to 40--50 ℃ under the condition that potassium permanganate exists, reacted 8--12 hour; Add 5kgNH again ₄CL, reaction is 6--8 hour under 40--50 ℃ of temperature, can obtain this unblocking agent 115kg.

Embodiment 2: get sour water 100kg one time, add 10kg acetone, heating is 60--70 ℃ under the potassium permanganate existence condition, reacts 10--12 hour; Add 5kg ammonium chloride again, reaction is 6--8 hour under 40--50 ℃ of condition, can obtain this unblocking agent 115kg.

Embodiment 3: get sour water 100kg one time, add 10kg formaldehyde, other reaction process and condition can obtain this unblocking agent 115kg with embodiment 1.

Claims

1, a kind of high efficiency compound oil, well unblocking agent synthetic method is characterized in that: this synthetic method is with organic acid, organic solvent and tensio-active agent, other treatment agents, is combined into efficient oil, well unblocking agent according to a certain ratio; Implementation step is as follows:

1) obtaining mixed organic acid can adopt oil chemistry factory to utilize waste liquid--the sour water that produces in the liquid wax saponification reaction synthetic detergent powder process;

2) add organic solvents such as ketone, aldehyde, alcohol according to actual needs such as oil well crude oil property and oil layer blocking situations, add corresponding organic solvent, its addition and concrete reaction conditions are: adding weight is ethanol, acetone or the formaldehyde of a sour water weight 10%, under 40--70 ℃ of condition is that the potassium permanganate of 0.5--1 ‰ is catalyst reaction 8--12 hour with the consumption;

3) introducing its addition of small molecules positively charged ion by the oxidation addition reaction with concrete reaction conditions is: adding weight is the ammonium chloride of a sour water weight 5%, and reaction is 6--8 hour under 40--50 ℃ of condition, can obtain this unblocking agent.