Multifunctional foaming system used in air foam flooding

An air-foam flooding, multi-functional technology, applied in drilling compositions, chemical instruments and methods, etc., can solve the problems of increased development cost, limited plugging capacity, hidden safety hazards, etc., and achieves reduced gas channeling and low cost. running effect

Inactive Publication Date: 2015-07-08
SOUTHWEST PETROLEUM UNIV
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  • Summary
  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The known foaming systems are all designed to satisfy the simple foaming and foam stabilizing functions of the foaming system. Although they have good foaming and foam stabilizing properties, there are still two problems in the actual application of air foam flooding: One is that the foam strength is small, it is easy to defoam when encountering oil, the plugging ability is limited, and the problem of gas channeling is still serious
Secondly, due to the occurrence of gas channeling, the oxygen in the air can easily enter the oil well, forming a safety hazard
Due to the existence of the above problems, certain surface oxygen reduction devices and profile control measures are often provided during the implementation of air foam flooding, which greatly increases the development cost, and the profile control operation will cause air foam flooding measures to be incoherent, affecting the performance of flooding. replacement effect

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Embodiment 1: The foaming system for multifunctional air foam flooding, the active ingredient weight percent of each component is:

[0037] Sodium fatty alcohol polyoxyethylene ether sulfate: 0.5%;

[0038] Silicone polyether emulsion: 0.2%;

[0039] Anionic polyacrylamide: 0.2%;

[0040] Molasses: 2%;

[0041] Yeast extract: 0.1%;

[0042] Ferrous sulfate: 0.005%;

[0043] Manganese sulfate: 0.0002%;

[0044] Sodium nitrate: 0.5%;

[0045] The balance is Huaziping Oilfield injection water, and the sum of the weight percentages of each component is 100%.

[0046] The preparation method of this embodiment:

[0047] Step 1. Add fatty alcohol polyoxyethylene ether sodium sulfate, silicone resin polyether emulsion, molasses, yeast extract, ferrous sulfate, manganese sulfate, and sodium nitrate in a stirring state according to weight percentage. Inject the Huaziping Oilfield under the water into water (the order of adding the above seven agents is not required), and ...

Embodiment 2

[0051] Embodiment 2: The foaming system for multifunctional air foam flooding, the active ingredient weight percent of each component is:

[0052] Fatty alcohol polyoxyethylene ether sodium sulfate: 0.1%;

[0053] Silicone polyether emulsion: 0.05%;

[0054] Anionic polyacrylamide: 0.05%;

[0055] Molasses: 0.5%;

[0056] Yeast extract: 0.01%;

[0057] Ferrous sulfate: 0.0005%;

[0058] Manganese sulfate: 0.00005%;

[0059] Sodium nitrate: 0.05%;

[0060] The balance is the sewage produced by Huaziping Oilfield, and the sum of the weight percentages of each component is 100%.

[0061] The preparation method of this embodiment:

[0062] Step 1. Add fatty alcohol polyoxyethylene ether sodium sulfate, silicone resin polyether emulsion, molasses, yeast extract, ferrous sulfate, manganese sulfate, and sodium nitrate in a stirring state according to weight percentage. In the Huaziping Oilfield produced sewage (the order of adding the above seven agents is not required), stir...

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Abstract

The invention discloses a multifunctional foaming system used in air foam flooding, relates to the technical field of oilfield development and is used for increasing oil recovery efficiency. The multifunctional foaming system is composed of following components, by weight: 0.1-0.5% of fatty alcohol polyoxyethylene ether sodium sulphate, 0.05-0.2% of silicon resin polyether emulsion, 0.05-0.2% of anionic polyacrylamide, 0.5-2% of molasses, 0.01-0.1% of yeast extraction, 0.0005-0.005% of ferrous sulfate, 0.00005-0.0002% of manganese sulfate, 0.05-0.5% of sodium nitrate and the balanced being water. The sum of weight percentages of all components is 100%. The multifunctional foaming system can solve a problem of requirements of a ground oxygen reducing apparatus and the profile control for plugging gas passages during conventional air foam flooding construction, and can enable the air foam flooding to be safe, more high-efficient and more low-cost.

Description

technical field [0001] The invention relates to the technical field of oilfield development, in particular to a multifunctional air foam flooding foaming system in tertiary oil recovery, which is used to enhance oil recovery in the middle and later stages of oilfield development. Background technique [0002] Air foam flooding is an enhanced oil recovery technology in which air and foam system are mixed in a certain proportion on the ground or in the oil layer to form foam as a means of oil displacement. This technology organically combines air flooding and foam flooding. Foam is used as a profile control agent and air is used as an oil displacement agent. It is an enhanced oil recovery technology with broad application prospects. [0003] Foaming system (also called foaming system) is the core of air foam flooding technology, and foaming system usually consists of surfactants, stabilizers and water. At present, the known foam system formulations mainly include the followi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/594C09K8/584
CPCC09K8/584C09K8/594
Inventor 康博张烈辉王健蒋建勋赵玉龙
Owner SOUTHWEST PETROLEUM UNIV
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