Slug injection-type oily sludge profile control agent, profile control method, and applications of slug injection-type oil-containing sludge profile control agent

A profile control agent and sludge technology, applied in chemical instruments and methods, earthwork drilling, wellbore/well components, etc., can solve the problem of low injection intensity of sludge profile control, oily sludge plugging failure, and consolidation strength Insufficient and other problems, to achieve the effect of increasing profile control intensity, increasing success rate of profile control, and good plugging performance

Inactive Publication Date: 2017-07-21
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Analysis of the reason is that the consolidation strength of the oily sludge in the formation is not enough, which will lead to the rapid failure of the oily sludge plugging after the sludge particles

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] This embodiment provides a slug-type oily sludge profile control agent, which includes a slug A component, a slug B component and a slug C component; by weight percentage,

[0038] The slug A component includes 95% oily sludge, 1% polyacrylamide, 0.1% formaldehyde, 0.05% resorcinol, 0.01% oxalic acid, 0.015% sodium hydroxide and the rest water;

[0039] Described slug B component comprises 78% oily sludge, 3% sodium soil, 8% rubber powder and the water of balance;

[0040] The slug C component includes 20% oil residue, 5% cement, 2% bentonite, 0.5% sodium tripolyphosphate and the balance water.

[0041] The present invention also provides a profile control method for the above-mentioned slug-type oily sludge profile control agent. Taking the Du 813-44-93 well in Shuguang Oilfield as an example, the above-mentioned slug-type oily sludge profile control agent is injected into the oil well for profile control operation , including the following steps:

[0042] Step 1, i...

Embodiment 2

[0048] This embodiment provides a slug-type oily sludge profile control agent, which includes a slug A component, a slug B component and a slug C component; by weight percentage,

[0049] The slug A component includes 93% oily sludge, 1.2% polyacrylamide, 0.12% formaldehyde, 0.08% resorcinol, 0.015% oxalic acid, 0.02% sodium hydroxide and the balance of water;

[0050] Described slug B component comprises 80% oily sludge, 3% sodium soil, 8% elm bark powder and the water of balance;

[0051] The slug C component includes 25% oil residue, 10% cement, 4% bentonite, 1.5% sodium tripolyphosphate and the balance water.

[0052] The present invention also provides a profile control method for the above-mentioned slug-type oily sludge profile control agent. Taking the Du 813-48-K57 well in Shuguang Oilfield as an example, the above-mentioned slug-type oily sludge profile control agent is injected into the oil well for profile control operation , including the following steps:

[0053...

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PUM

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Abstract

The invention discloses a slug injection-type oily sludge profile control agent, a profile control method, and applications of the slug injection-type oil-containing sludge profile control agent. The slug injection-type oily sludge profile control agent comprises a slug injection A component, a slug injection B component, and a slug injection C component; the slug injection A component comprises 90 to 95% of oily sludge, 1 to 1.5% of a high-molecular polymer, 0.1 to 0.15% of formaldehyde, 0.05 to 0.1% of resorcinol, 0.01 to 0.015% of a pH conditioning agent, 0.015 to 0.03% of a stabilizing agent, and the balance water; the slug injection B component comprises 78 to 80% of oily sludge, 3% of a suspending agent, 6 to 8% of solid-phase particles, and the balance water; and the slug injection C component comprises 20 to 25% of oily sludge, 5 to 10% of cement, 2 to 5% of a thixotropic agent, 0.5 to 2% of an inorganic retarder, and the balance water. The slug injection-type oily sludge profile control agent is capable of increasing oily sludge profile control strength and success rate, is capable of tolerating high temperature steam washing, is excellent in plugging effect, and is capable of increasing petroleum production.

Description

technical field [0001] The invention belongs to the field of petroleum exploitation, and relates to a slug type oily sludge profile control agent, a profile control method and an application. Background technique [0002] Oily sludge is oily solid waste produced in the process of crude oil extraction, gathering and transportation, etc. As most oil fields enter the middle and late stage of exploitation, the water content in the produced oil is getting higher and higher, resulting in the amount of oily sludge in the gathering and transportation system. Hoard in large quantities. At present, oily sludge has been used to prepare profile control agents for profile control of heavy oil wells in China, which not only saves the cost of profile control, but also solves the problem of oily sludge treatment. [0003] However, in the process of field application, when some heavy oil wells are carrying out profile control construction of oily sludge, the pressure climbs slowly, and even...

Claims

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Application Information

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IPC IPC(8): C09K8/508C09K8/506C09K8/504E21B33/13
CPCC09K8/508C09K8/5045C09K8/506C09K8/5083E21B33/13
Inventor 王尧张守军滕立勇刘恒杨洋王浩李瑞王斯雯马昌明刘强陈小凯曾立桂郑猛于萍于福涛
Owner PETROCHINA CO LTD
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