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Hydraulic sand-jet perforating solution for horizontal well

A technology of hydraulic jetting and perforating fluid, applied in the field of perforating fluid, can solve the problems of easy corruption, increase the friction of sandblasting nozzle, large loss of liquid viscosity, etc., and achieve the effects of good stability, lower cost and good suspension effect.

Inactive Publication Date: 2013-06-12
RES INST OF SHAANXI YANCHANG PETROLEUM GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The shortcomings of plant linear glue as perforating fluid are: ①It cannot be left for a long time and is easy to be corrupted, and the addition of fungicides will increase the cost
② After high-speed shearing, the molecular chain is easy to break, so it shows that the viscosity of the liquid loses too much after being sheared by the sandblasting nozzle, and it is difficult to recover
③ If high-concentration hydroxypropyl guar gum is used, it will increase the friction at the blasting nozzle, and in severe cases, it will affect the effect of blasting and perforation

Method used

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  • Hydraulic sand-jet perforating solution for horizontal well
  • Hydraulic sand-jet perforating solution for horizontal well
  • Hydraulic sand-jet perforating solution for horizontal well

Examples

Experimental program
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Effect test

Embodiment 1

[0019] Get 2% dodecyltrimethylammonium chloride, 0.3% sodium benzoate, 1% potassium chloride by the following mass percentage, and the balance is water, mix the above-mentioned formula raw materials evenly, and the mixed aqueous solution is based on The invented hydraulic sandblasting perforating fluid for horizontal wells, referred to as perforating fluid; the perforating fluid has a viscosity of 31.6mPa.s, which can meet the needs of sandblasting and perforating horizontal wells with a depth of 2000-3000m.

Embodiment 2

[0021] Get 1% dodecyltrimethylammonium chloride, 0.3% sodium benzoate, 1% potassium chloride by the following mass percentage, and the balance is water, mix the above-mentioned formula raw materials evenly, and the mixed aqueous solution is the basis The invented hydraulic sandblasting perforating fluid for horizontal wells, referred to as perforating fluid; the perforating fluid has a viscosity of 23.5mPa.s, which can meet the needs of sandblasting and perforating horizontal wells with a depth of less than 2000m.

Embodiment 3

[0023] Get 4% cetyltrimethylammonium chloride, 0.4% sodium benzoate, 1% potassium chloride according to the following mass percentage, and the balance is water, and the above-mentioned formula raw materials are mixed evenly, and the mixed aqueous solution is based on The invented hydraulic sandblasting perforating fluid for horizontal wells, referred to as perforating fluid; the perforating fluid has a viscosity of 48.2mPa.s, which can meet the needs of sandblasting and perforating horizontal wells with a depth of 2000-3000m.

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Abstract

The invention relates to hydraulic sand-jet perforating solution for a horizontal well. The hydraulic sand-jet perforating solution is characterized by being the aqueous solution mixed from 1-5% of alkyl quaternary ammonium salt, 0.1-0.5% of counter-ion salt and 1-3% of inorganic salt, or the aqueous solution mixed from 1-5% of alkyl quaternary ammonium salt, 0.1-0.5% of counter-ion salt, 1-3% of inorganic salt and 0.02-0.08% of straight-chain alcohol, wherein the percentage is percentage by mass. The perforating solution is simple to prepare, recyclable and cost-saving, and capable of being placed for a long time and not easy to go bad; the structure of the perforating solution is good in stability, and the viscosity of the solution can be automatically repaired after cutting; simultaneously, the influence of residual sand on the perforating effect is avoided.

Description

technical field [0001] The invention relates to a perforating fluid in the hydraulic sand blasting perforation process in the development of oil and gas fields, in particular to a horizontal well hydraulic sand blasting perforation fluid. Background technique [0002] At present, vegetable glue linear fluid is widely used in hydraulic sandblasting and perforating operations, mainly linear hydroxypropyl guanidine glue of 0.3-0.5% (mass percentage), with a viscosity between 30-80mPa.S. The shortcomings of plant linear glue as perforating fluid are: ①It cannot be left for a long time and is easy to be corrupted, and the addition of fungicides will increase the cost. ②After high-speed shearing, the molecular chain is easy to break, so it shows that the viscosity of the liquid loses too much after being sheared by the sandblasting nozzle, and it is difficult to recover. ③ If high-concentration hydroxypropyl guar gum is used, it will increase the friction at the sandblasting noz...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/68C09K8/528
Inventor 李彦林雷晓岚陶红胜申峰吴金桥段玉秀王新庆江绍静
Owner RES INST OF SHAANXI YANCHANG PETROLEUM GRP