High-temperature solid foam draining agent and preparation method

A technology of high-temperature solids and foam discharge agent, applied in chemical instruments and methods, drilling composition and other directions, can solve the problems of unsuitable gas wells, inconvenient storage and filling, and poor drainage effect.

Active Publication Date: 2017-11-28
PETROCHINA CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the commonly used foaming agents are all liquid type. Under the conditions of well temperature ≥ 120 ℃ and well depth ≥ 3500m, the foam performance will decrease and the drainage effect will become poor; during construction, it is necessary to set up a dosing pump at the wellhead and fill it manually. For intermittent drainage Not suitable for gas wells; thickening or solidification under low temperature conditions, inconvenient storage and filling in winter

Method used

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  • High-temperature solid foam draining agent and preparation method

Examples

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specific Embodiment approach

[0021] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS: The present invention will be further described below in conjunction with examples: a high-temperature solid foam discharge agent, which is composed of alkyl sulfate, ammonium lauryl sulfate C 12 H 25 SO 4 NH 4 , Stearic acid C 18 H 36 O 2 , sodium carbonate Na 2 CO 3 and water composition, their weight percentages are: alkyl sulfate 20% to 30%, ammonium lauryl sulfate C 12 H 25 SO 4 NH 4 10%~15%, Stearic acid C 18 H 36 O 2 25%~35%, sodium carbonate Na 2 CO 3 8%~12%, the rest is water;

[0022] A preparation method of a high temperature solid foam discharge agent:

[0023] (1) Weigh 20% to 30% of alkyl sulfate and 10% to 15% of ammonium lauryl sulfate C respectively. 12 H 25 SO 4 NH 4 , 25% to 35% stearic acid C 18 H 36 O 2 , 8%~12% sodium carbonate Na 2 CO 3 ; the rest is water;

[0024] (2) Alkyl sulfate, ammonium lauryl sulfate C 12 H 25 SO 4 NH 4 Add them to the reaction kettle respecti...

Embodiment 1

[0031] Example 1: This example provides a gas well high temperature solid foam discharge agent SG-1.

[0032] SG-1 type high temperature solid foam discharge agent, it is composed of sodium lauryl sulfate C 12 H 25 SO 4 Na, ammonium lauryl sulfate C 12 H 25 SO 4 NH 4 , Stearic acid C 18 H 36 O 2 , sodium carbonate Na 2 CO 3 and water composition, their weight percentages are: Sodium Lauryl Sulfate C 12 H 25 SO 4 Na30%, Ammonium Lauryl Sulfate C12 H 25 SO 4 NH 4 15%, Stearic Acid C 18 H 36 O 2 25%, sodium carbonate Na 2 CO 3 8%, the rest is water;

[0033] (1) Weigh sodium lauryl sulfate C with a weight ratio of 30% respectively 12 H 25 SO 4 Na, 15% Ammonium Lauryl Sulfate C 12 H 25 SO 4 NH 4 , 25% stearic acid C 18 H 36 O 2 , 8% sodium carbonate Na 2 CO 3 ; the rest is water;

[0034] (2) Sodium lauryl sulfate C 12 H 25 SO 4 Na, ammonium lauryl sulfate C 12 H 25 SO 4 NH 4 Add them to the reaction kettle respectively, stir for 2h, the st...

Embodiment 2

[0040] Example 2: This example provides a high temperature solid foam discharge agent SKG-1 for gas wells.

[0041] SKG-1 type high temperature solid foam discharge agent, it is composed of sodium lauryl sulfate C 12 H 25 SO 4 Na, C 13～16 Sodium Fatty Alcohol Sulfate C 13～16 H 27～33 SO 4 Na, ammonium lauryl sulfate C 12 H 25 SO 4 NH 4 , Stearic acid C 18 H 36 O 2 , sodium carbonate Na 2 CO 3 and water composition, their weight percentages are: Sodium Lauryl Sulfate C 12 H 25 SO 4 Na10%, C 13～16 Sodium Fatty Alcohol Sulfate C 13～16 H 27～33 SO 4 Na10%, Ammonium Lauryl Sulfate C 12 H 25 SO 4 NH 4 10%, stearic acid C 18 H 36 O 2 35%, sodium carbonate Na 2 CO 3 12%, the rest is water;

[0042] The preparation method of SKG-1 type high temperature solid foam discharge agent:

[0043] (1) Weigh sodium lauryl sulfate C with a weight ratio of 10% respectively 12 H 25 SO 4 Na, 10% C 13～16 Sodium Fatty Alcohol Sulfate C 13～16 H 27～33 SO 4 Na, 10% Amm...

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Abstract

The invention relates to the technical field of oil production engineering for oil fields, provides a high-temperature solid foam draining agent for drainage gas recovery for gas wells and a preparation method of the foam draining agent and is researched to solve the problems that high-temperature deep gas well foam draining agents have reduced performance, are poor in draining effect and inconvenient to store and fill in winter and the like. The high-temperature solid foam draining agent is prepared from, in percentage by weight, 20%-30% of alkyl sulfate, 10%-15% of ammonium lauryl sulfate C12H25SO4NH4, 25%-35% of stearic acid C18H36O2, 8%-12% of sodium carbonate Na2CO3 and the balance of water. The invention further provides the preparation method of the foam draining agent. The foam draining agent is suitable for deep gas wells with the well temperatures larger than or equal to 120 DEG C or the well depths larger than or equal to 3,500 m, is particularly applied to continuous production and intermittent draining gas wells and has the advantages of being good in foaming performance and high in foam stability at the high temperature, convenient to store and transport, small in pollution and the like.

Description

technical field [0001] The invention relates to the technical field of oilfield oil production engineering, and provides a high-temperature solid foam discharge agent for gas well drainage and gas production and a preparation method. Background technique [0002] After the gas well produces water, it gradually becomes an intermittent well, or even stops production, and requires drainage gas recovery technology to resume production. Foam drainage is a simple, cost-effective drainage and gas recovery technology. At present, the commonly used foam discharge agents are all liquid types. When the well temperature is ≥ 120 °C and the well depth is ≥ 3500 m, the foam performance will decrease, and the drainage effect will become worse; during construction, a dosing pump at the wellhead needs to be set up by manual operation. It is not suitable for gas wells of high temperature; it thickens or solidifies under low temperature conditions, and it is inconvenient to store and refill i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/584C09K8/58
CPCC09K8/58C09K8/584
Inventor 张永平徐德奎蔡萌马文海李楠宁凡哲马品刚李俊亮黄伟明翟庆红
Owner PETROCHINA CO LTD
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