A kind of high-temperature solid foaming agent and preparation method thereof

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 oil production engineering in oil fields, and provides a high-temperature solid foaming agent for gas well drainage and gas production and a preparation method thereof. Background technique

[0002] After the gas well produces water, it gradually becomes an intermittent well, or even stops production, and drainage gas recovery technology is required to resume production. Foam drainage is a simple, cost-effective drainage and gas recovery 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 It is not suitable for gas wells; it thickens or solidifies under low temperature conditions, and it is inconvenient to st...

Examples

specific Embodiment approach

[0021] Specific embodiments: the present invention will be further described below in conjunction with embodiment: a kind of high-temperature solid foaming agent, it is made of alkyl sulfate, lauryl ammonium 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 percentage is: alkyl sulfate 20% ~ 30%, lauryl ammonium 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 kind of preparation method of high temperature solid foaming agent:

[0023] (1) Weigh the alkyl sulfate with a weight ratio of 20% to 30%, and the ammonium lauryl sulfate with a weight ratio of 10% to 15%. 12 h 25 SO 4 NH 4 , 25% to 35% stearic acid C 18 h 36 o 2 , 8% to 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 to the reaction kettle respectively,...

Embodiment 1

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

[0032] SG-1 type high temperature solid foaming 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 percentage by weight is: 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 the sodium lauryl sulfate C with a weight ratio of 30% 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 to the reaction kettle respectively, stir for 2 hours, the stirring speed is 100r / m...

Embodiment 2

[0040] Example 2: This example provides a gas well high-temperature solid foaming agent SKG-1.

[0041] SKG-1 type high temperature solid foaming 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 percentage by weight is: 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 foaming agent:

[0043] (1) Weigh 10% sodium lauryl sulfate C 12 h 25 SO 4 Na, 10% C 13～16 Sodium Fatty Alcohol Sulfate C 13～16 h 27～33 SO 4 Na, 10% ammonium lauryl sulfate C 12 h 25 SO 4 NH 4 , 35% stearic aci...

technical field

[0001] The invention relates to the technical field of oil production engineering in oil fields, and provides a high-temperature solid foaming agent for gas well drainage and gas production and a preparation method thereof. Background technique

[0002] After the gas well produces water, it gradually becomes an intermittent well, or even stops production, and drainage gas recovery technology is required to resume production. Foam drainage is a simple, cost-effective drainage and gas recovery 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 It is not suitable for gas wells; it thickens or solidifies under low temperature conditions, and it is inconvenient to st...

Examples

specific Embodiment approach

[0021] Specific embodiments: the present invention will be further described below in conjunction with embodiment: a kind of high-temperature solid foaming agent, it is made of alkyl sulfate, lauryl ammonium 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 percentage is: alkyl sulfate 20% ~ 30%, lauryl ammonium 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 kind of preparation method of high temperature solid foaming agent:

[0023] (1) Weigh the alkyl sulfate with a weight ratio of 20% to 30%, and the ammonium lauryl sulfate with a weight ratio of 10% to 15%. 12 h 25 SO 4 NH 4 , 25% to 35% stearic acid C 18 h 36 o 2 , 8% to 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 to the reaction kettle respectively,...

Embodiment 1

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

[0032] SG-1 type high temperature solid foaming 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 percentage by weight is: 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 the sodium lauryl sulfate C with a weight ratio of 30% 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 to the reaction kettle respectively, stir for 2 hours, the stirring speed is 100r / m...

Embodiment 2

[0040] Example 2: This example provides a gas well high-temperature solid foaming agent SKG-1.

[0041] SKG-1 type high temperature solid foaming 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 percentage by weight is: 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 foaming agent:

[0043] (1) Weigh 10% sodium lauryl sulfate C 12 h 25 SO 4 Na, 10% C 13～16 Sodium Fatty Alcohol Sulfate C 13～16 h 27～33 SO 4 Na, 10% ammonium lauryl sulfate C 12 h 25 SO 4 NH 4 , 35% stearic aci...

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