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Micro-foam agent for oil field oil gas well cementation and preparation method thereof

A micro-foam agent and well cementing technology, which is applied in the field of petroleum cementing, can solve the problems of reduced compressive strength of cement slurry solidified body, difficulty in foaming cement slurry, and poor high temperature resistance, so as to improve saponification effect and high temperature resistance Performance, the effect of strengthening the film strength

Inactive Publication Date: 2012-01-18
XI'AN PETROLEUM UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main disadvantage of this method is that the equipment is complicated, the cost is high, and the construction process is complicated.
[0007] The common rosin thermal polymer air-entraining agent used in the construction industry is directly added to the cement slurry. The main problems are: it has a significant effect on reducing the compressive strength of the cement slurry solidified body, the foam size is large, and the stability is not good, which is not conducive to Pumped to the downhole of oil and gas wells; poor high temperature resistance; liquid products are difficult to prepare foam cement slurry on site

Method used

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  • Micro-foam agent for oil field oil gas well cementation and preparation method thereof
  • Micro-foam agent for oil field oil gas well cementation and preparation method thereof
  • Micro-foam agent for oil field oil gas well cementation and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] A microfoam agent for oil and gas well cementing in an oil field, which is composed of a microfoam semi-finished product and sepiolite clay in a weight ratio of 1:30;

[0037] Described microfoam semi-finished product is made up of the component of following parts by weight:

[0038]

[0039] The preparation method of microfoam agent for oil and gas well cementing in this oil field comprises the steps:

[0040] In the first step, inject 10 parts by weight of water into the liquid mixing tank with agitator, stir and heat to 80-90 °C, and add 5 parts by weight of potassium silicate solution with a mass fraction of 50% to the liquid mixing tank Medium, rotating speed 100-400 rpm, stirring for 0.5h;

[0041] In the second step, at a temperature of 90°C and a rotating speed of 100-400 rpm, add 8 parts by weight of rosin powder to the stirred solution in the first step, stir for 2.5 hours, and carry out saponification until the water content is 20 up to -27%;

[0042] I...

Embodiment 2

[0045] A microfoam agent for oil and gas well cementing in an oil field, which is composed of a microfoam semi-finished product and sepiolite clay in a weight ratio of 1:30;

[0046] Described microfoam semi-finished product is made up of the component of following parts by weight:

[0047]

[0048] The preparation method of microfoam agent for oil and gas well cementing in this oil field comprises the steps:

[0049] In the first step, inject 10 parts by weight of water into the liquid mixing tank with agitator, stir and heat to 80-90°C, and add 5 parts by weight of sodium silicate solution with a mass fraction of 50% into the liquid mixing tank Medium, rotating speed 100-400 rpm, stirring for 0.5h;

[0050] In the second step, at a temperature of 90°C and a rotating speed of 100-400 rpm, add 8 parts by weight of rosin powder to the stirred solution in the first step, stir for 2.5 hours, and carry out saponification until the water content is 20 up to -27%;

[0051] In ...

Embodiment 3

[0054] A microfoam agent for oil and gas well cementing in an oil field, which is composed of microfoam semi-finished products and sepiolite clay with a weight ratio of 1:35;

[0055] Described microfoam semi-finished product is made up of the component of following parts by weight:

[0056]

[0057] The preparation method of microfoam agent for oil and gas well cementing in this oil field comprises the steps:

[0058] In the first step, inject 10 parts by weight of water into the liquid mixing tank with agitator, stir and heat to 80-90°C, and add 5 parts by weight of sodium silicate solution with a mass fraction of 50% into the liquid mixing tank Medium, rotating speed 100-400 rpm, stirring for 0.5h;

[0059] In the second step, at a temperature of 90°C and a rotating speed of 100-400 rpm, add 8 parts by weight of rosin powder to the stirred solution in the first step, stir for 2.5 hours, and carry out saponification until the water content is 20 up to -27%;

[0060] In...

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Abstract

The invention discloses a micro-foam agent for oil field oil gas well cementation. The micro-foam agent is prepared from a micro-foam agent half-finished product and silicate clay mineral in the weight ratio of 1:25-35; the micro-foam agent half-finished product is prepared from the following components in parts by weight: 7-11 parts of rosin powder, 4-7 parts of silicate saponifier, 0.7-1.3 parts of high-temperature-resistant surfactant combination, 1.0-3.0 parts of well cementation reinforcing agent and 8-12 parts of water, wherein the silicate clay mineral is sepiolite clay or lithium-based bentonite; the silicate saponifier is sodium silicate or potassium silicate; the well cementation reinforcing agent is triisopropanolamine or triethanolamine; and the high-temperature-resistant surfactant combination consists of OP-10 and SP-80 in the weight ratio of 1:1 or APG (Alkyl Polyglucoside) and SP-80 in the weight ratio of 1:1. The invention also provides a preparation method of the micro-foam agent. Thus, a novel ultra-low density micro-foam well cementation cement slurry system with fine foam, high stability, simple preparation process and superior overall performance is established.

Description

technical field [0001] The invention belongs to the technical field of petroleum cementing, and in particular relates to a microfoam agent for cementing oil and gas wells in an oil field and a preparation method thereof. Background technique [0002] Foam cementing cement slurry is a kind of ultra-low density cementing cement slurry, which can be applied to the cementing operation of sealing low-pressure leaky formations, shallow gas layers and wells with long sealing intervals. The application in cementing engineering has the following advantages: [0003] ① Low density, the lowest density can reach 0.72g / cm 3 ; ②It is beneficial to improve the efficiency of mud replacement, because the foamed cement slurry has a high viscosity, which is conducive to displacing mud that is not easy to flow; ③It has relatively high compressive strength (under the same density condition); ④Because of its Compressibility, so it can compensate for the gelling loss of cement slurry, which is b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/473
Inventor 杨振杰吴志强冯永超焦庆庆朱海涛刘建全
Owner XI'AN PETROLEUM UNIVERSITY
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