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Non-resin Profile Control Agent and Its Application in Petroleum Exploitation

A technology of oil exploitation and profile control agent, which is applied in the direction of earthwork drilling, drilling composition, wellbore/well parts, etc., and can solve the problem that drilling cuttings are not suitable for preparing profile control agent, etc.

Active Publication Date: 2019-06-28
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The main purpose of the present invention is to provide a non-resin type profile control agent and its application in oil production, so as to solve the problem that drill cuttings are not suitable for preparing profile control agents in the prior art

Method used

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  • Non-resin Profile Control Agent and Its Application in Petroleum Exploitation
  • Non-resin Profile Control Agent and Its Application in Petroleum Exploitation
  • Non-resin Profile Control Agent and Its Application in Petroleum Exploitation

Examples

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preparation example Construction

[0034] The preparation process of profile control agent is as follows: figure 2 As shown, the specific process is as follows: the drilling cuttings slurry is transported to the profile control well site collection tank 21, and the suspending agent, dispersing agent, optional retarder and curing agent are added to the drill bit through the dosing device 22 according to different formulations. In the crumbs, fully stir in the mixing tank 23, and at the same time inject the on-site reinjection water for dilution and aging. The prepared profile control agent is pumped into the water injection well 25 by the hydraulic reinjection pump 24 .

[0035] During the injection of the profile control agent, the injection pump is preferably a TPB hydraulic profile control injection pump. The TPB hydraulic profile control injection pump converts the high-speed rotating mechanical energy of the motor into the pressure energy of the hydraulic oil through the constant power variable oil pump, ...

Embodiment 1

[0048] In this embodiment, the drill cuttings are mixed with water before use to make a drill cuttings slurry with a solid content of 15wt%, and the specific composition is 15wt% drill cuttings and 85wt% water, and the particle size of the drill cuttings is less than 0.1mm. The first profile control agent, the second profile control agent and the third profile control agent were prepared respectively by using the above drilling cuttings slurry.

[0049] Three-slug profile control technology is adopted. The first profile control agent includes 2g drilling cuttings, 0.1g polyacrylamide (suspension agent), 0.2g sodium hexametaphosphate (dispersant), 0.5g sodium silicate (curing agent) and 97.2g water;

[0050] The second profile control agent includes 5g drilling cuttings, 0.3g polyacrylamide (suspension agent), 0.4g sodium hexametaphosphate (dispersant), 5g sodium silicate (curing agent), 0.1g sodium fluorosilicate (set retarder) ) and 89.2g of water; and

[0051] The third pr...

Embodiment 2

[0053] In this embodiment, the drill cuttings are mixed with water before use to make a drill cuttings slurry with a solid content of 15wt%, and the specific composition is 15wt% drill cuttings and 85wt% water, and the particle size of the drill cuttings is less than 0.1mm. The first profile control agent, the second profile control agent and the third profile control agent were prepared respectively by using the above drilling cuttings slurry.

[0054] Three-slug profile control technology is adopted. The first profile control agent includes 5g drilling cuttings, 0.3g polyacrylamide (suspension agent), 0.2g sodium hexametaphosphate (dispersant), 0.1g sodium silicate (curing agent) and 94.4g water;

[0055] The second profile control agent includes 10g drilling cuttings, 0.5g polyacrylamide (suspension agent), 0.2g sodium hexametaphosphate (dispersant), 2g sodium silicate (curing agent), 0.3g sodium fluorosilicate (set retarder) ) and 87g of water; and

[0056] The third pro...

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Abstract

The invention provides a non-resin type profile control agent and an application thereof in oil exploitation. The profile control agent comprises components in percentage by weight as follows: 1%-10% of drilling cuttings, 0.1%-0.5% of a suspending agent, 0.1%-0.4% of a dispersing agent, 0.1%-0.5% of a curing agent and 84.1%-98.6% of water, wherein the suspending agent is an organic polymer, and before usage, drilling slurry with the solid content of 15wt%-20wt% is firstly prepared from the drilling cuttings and the water. The non-resin type profile control agent containing the drilling cuttings has good profile control performance and is simple and convenient to use.

Description

technical field [0001] The invention relates to the field of petroleum exploitation, in particular to a non-resin type profile control agent and its application in petroleum exploitation. Background technique [0002] Drill cuttings are rock fragments that are brought to the surface with drilling fluid after being broken by the drill bit during drilling operations. At present, the most common way to deal with drilling cuttings is solidification and landfill, that is, adding a curing agent in the curing pool to make the drilling mud and cuttings reach a certain solidification strength and then cover them with soil for landfill. The biggest disadvantage of the above method is that the curing cycle is long and the processing cost is high. [0003] In the existing schemes for preparing profile control agents, the profile control agents mostly use high-pressure sewage guns to stir the waste mud evenly, and then transport them to the use site through submersible sewage pumps. C...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/508E21B33/138
CPCC09K8/5083C09K8/514E21B33/138
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Owner 里群
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