A kind of oily sludge profile control agent and preparation method thereof

A profile control agent and sludge technology, applied in chemical instruments and methods, drilling compositions, etc., can solve problems such as the inability of the thickener to disperse completely and effectively, the performance of profile control gels not up to the standard, and the validity period of water blocking is short, etc. , to achieve the effect of controllable gel formation time, improved strength and obvious effect

CN107629775BActive Publication Date: 2020-05-08PETROCHINA CO LTD
9 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2020-05-08

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention discloses a sludge profile control agent and a preparation method thereof, wherein the sludge profile control agent comprises 0.1-0.5% of a thickener, 0.01-0.2% of a crosslinking agent,oily sludge and water. A surfactant group is introduced into thickener molecules, the oily sludge can be effectively suspended and dispersed, and the crosslinking agent is a hydroxymethyl amine solution. The preparation method comprises the steps of mixing clear water and the oily sludge in accordance with the proportion evenly, firstly adding the crosslinking agent and stirring evenly, then adding the thickener, continuing to stir to obtain the sludge profile control agent having good injection performance; the sludge profile control agent has controllable gelling time, has relatively strongsealing and plugging ability and salt tolerance, and achieves deep profile control; the profile control agent realizes utilization of resources of the oily sludge, has no use of phenol and aldehyde products, and is an environmental-protection type profile control agent.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention relates to the technical field of oilfield profile control agents, in particular to an oily sludge profile control agent and a preparation method thereof, which is a deep oily sludge profile control agent with controllable gelation time. Background technique

[0002] In the process of oil field development, oily sludge will be generated in oil-water separation, sewage treatment and storage and transportation systems. A large amount of oily sludge will seriously affect the on-site production environment and increase production costs. Therefore, while developing production, how to realize economical and effective harmless treatment of oily sludge is an urgent problem to be solved in the production process of oilfields. Since the oily sludge is produced in the formation and has good compatibility with the oil layer, and the solid phase particles in the oily sludge have a profile control effect, the oily sludge can be used as the basic raw ma...

Examples

Embodiment 1

[0034] Dissolve acrylamide, acrylic acid, 2-acrylamide-2-methylpropanesulfonic acid and surface-active functional monomers in water, neutralize them with 30% sodium hydroxide solution, and control the neutralization temperature below 20°C in an ice-water bath. The mass is 30-35%, and nitrogen gas is passed through to remove oxygen for 30 minutes, and the product is obtained through a compound initiation system composed of ammonium persulfate, white block and water-soluble azo V044 to initiate polymerization, granulate, dry and pulverize. The specific ratio is shown in Table 2:

[0035] Table 2

[0036]

Embodiment 2

[0038] at 5m 3 Add 3.0m to the mixing tank 3 clean water, start stirring and add 2.0m 3 Oily sludge, then add 5.0Kg of cross-linking agent JL-POA and 10.0Kg of thickener A to obtain profile control agent.

Embodiment 3-7

[0040] According to the addition and preparation method of Example 2, different profile control agents were prepared, and the composition is shown in Table 3.

[0041] table 3

[0042]

[0043]