Perforating fluid for well completion

A technology of perforating fluid and flow pattern regulator, which is applied in the field of perforating fluid, can solve the problems of many equipments and difficult foam density, and achieve the effects of simple preparation, slow corrosion and good reservoir protection effect

Active Publication Date: 2011-02-16
CHINA NAT OFFSHORE OIL CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The present invention aims at the leakage problem in the existing well completion process, the shortage of perforating fluid in the existing low-pressure oil and gas reservoirs and the stability of the well wall, as well as the problems of many producing equipment on site and difficult adjustment of foam density, etc., and provides an offshore oil Low temperature microbubble perforating fluid for well completion

Method used

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  • Perforating fluid for well completion

Examples

Experimental program
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Effect test

Embodiment 1

[0026] Embodiment 1, preparation of low-temperature microbubble perforating fluid for offshore oil well completion

[0027]The formula is: 400g of fresh water, 0.80g of sodium carbonate, 1.60g of a flow regulator (composed of xanthan gum and sodium tetraborate in a ratio of 1:1 in parts by mass, wherein the number average molecular weight of xanthan gum is 2×10 6 g / mol), foaming agent 0.80g (composed of dodecyl dimethyl amine oxide and sodium α-alkenyl sulfonate (number-average molecular weight: 300g / mol) with a mass-number ratio of 2:1), stable Agent 1.60g (consisting of petroleum ether, sorbitol oleate and lauryl alcohol in a mass ratio of 3:2:5), clay stabilizer glycidyltrimethylammonium chloride 8.00g, CA101-4 buffer Etch agent 6.00g and PF-SATRO waterproof locking agent 1.20g. The mass ratio of each component is water: sodium carbonate: flow regulator: foaming agent: stabilizer: clay stabilizer: corrosion inhibitor: waterproof lock agent is 100: 0.2: 0.4: 0.2: 0.4: 2.0: ...

Embodiment 2

[0029] Embodiment 2, preparation of low-temperature microbubble perforating fluid for offshore oil well completion

[0030] The formula is: 400g of seawater from the Bohai Sea, 0.80g of sodium carbonate, 1.20g of a flow regulator (composed of xanthan gum and boric acid at a ratio of 2:1 in parts by mass, wherein the number average molecular weight of xanthan gum is 2×10 7 g / mol), foaming agent 0.40g (composed of dodecyl dimethyl amine oxide and sodium α-alkenyl sulfonate (number-average molecular weight: 320g / mol) with a mass-number ratio of 1:1), stable 0.80g of agent (composed of petroleum ether, sorbitol oleate and lauryl alcohol in a ratio of 1:2:7 in parts by mass), clay stabilizer glycidyltrimethylammonium chloride 10.00g, CA101-4 buffer Etch agent 6.00g and PF-SATRO waterproof locking agent 1.60g. The mass ratio of each component is water: sodium carbonate: flow regulator: foaming agent: stabilizer: clay stabilizer: corrosion inhibitor: waterproof locking agent is 100:...

Embodiment 3

[0032] Embodiment 3, preparation of low-temperature microbubble perforating fluid for offshore oil well completion

[0033] The formula is: 400g of seawater from the South China Sea, 0.80g of sodium carbonate, 1.20g of a flow regulator (composed of xanthan collagen and sodium tetraborate at a ratio of 2:1 in parts by mass, wherein the number average molecular weight of xanthan collagen is 1.5×10 7 g / mol), foaming agent 0.40g (composed of dodecyl dimethyl amine oxide and sodium α-alkenyl sulfonate (number-average molecular weight: 310g / mol) with a mass-number ratio of 1:1), stable Agent 0.80g (composed of petroleum ether, sorbitol oleate and lauryl alcohol in a ratio of 2:2:6 in parts by mass), clay stabilizer glycidyltrimethylammonium chloride 12.00g, CA101-4 buffer Etch agent 6.00g and PF-SATRO waterproof locking agent 2.00g. The mass ratio of each component is water: sodium carbonate: flow regulator: foaming agent: stabilizer: clay stabilizer: corrosion inhibitor: waterproo...

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Abstract

The invention discloses a low-temperature microfoam perforating fluid for an offshore oil well completion, comprising the following materials: water, sodium carbonate, flow pattern regulators, foaming agents and stabilizers, wherein the ratio of the water, the sodium carbonate, the flow pattern regulators, the foaming agents to the stabilizers is 100:(0.1-0.3):(0.3-0.4):(0.1-0.2):(0.2-0.4) in parts by weight. The low-temperature microfoam perforating fluid also comprises clay stabilizers, inhibiters and waterproof locking agents. The low-temperature microfoam perforating fluid for the offshore oil well completion is a novel perforating fluid, not only has the advantages of the traditional common perforating fluid, but also newly increases the advantages of leakage prevention and leakage stoppage on performance, solves the problem of leakage loss in the completion process and also has adjustable density. The invention overcomes the defects of numerous and jumbled nitrogen foam configuration equipment and difficult control of circular foam density on use and has simple and easy configuration equipment and convenient and easy density adjustment.

Description

technical field [0001] The invention relates to a perforating fluid, in particular to a low-temperature microbubble perforating fluid for offshore oil well completion. Background technique [0002] Perforating fluid is the completion fluid used when perforating a well during the well completion process. Completion fluid is a fluid that directly contacts the reservoir, and its performance is directly related to the reserves and production of the oil field. Well completion operations are an important part of oil and gas field development. If improper measures are taken during well completion operations, the production capacity of oil and gas wells may be seriously reduced, and the measures to protect oil and gas layers during drilling will fall short. Therefore, understanding the characteristics of oil and gas layer damage during well completion, designing various completion fluids to protect oil and gas layers, and being able to select the most suitable completion method ac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/12C09K8/08
Inventor 何保生郑力会孙福街韩子轩李玉光曹园周文胜王珊
Owner CHINA NAT OFFSHORE OIL CORP
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