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Hydrogenation hot gas chemical yield increasing solution component applied to low-yield low-permeability oil well

A chemical stimulation and low-permeability technology, applied in drilling compositions, chemical instruments and methods, wellbore/well components, etc., can solve the problems that cannot be used repeatedly, damage the wellbore, and have a short validity period

Active Publication Date: 2013-02-27
吉林贯通能源科技有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Fracturing technology, injecting high-pressure water exceeding the fracture degree of the rock into the reservoir to break the reservoir rock and form oil and gas seepage channels. During the fracturing process, proppant is used, the construction is complicated, the cost is high, and the validity period is short, so it cannot be repeated Acidification technology is adopted to improve the permeability of the oil layer by injecting acid into the formation to dissolve the blockages in the pores. This method is destructive to the formation.
Intra-layer explosion stimulation technology, a certain amount of explosives is placed in the wellbore where the reservoir is located, and the high-temperature and high-pressure gas generated by the explosion of the explosives is used to act on the rock formation to form cracks that are conducive to oil and gas seepage, but sometimes the explosion will damage the wellbore

Method used

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  • Hydrogenation hot gas chemical yield increasing solution component applied to low-yield low-permeability oil well
  • Hydrogenation hot gas chemical yield increasing solution component applied to low-yield low-permeability oil well
  • Hydrogenation hot gas chemical yield increasing solution component applied to low-yield low-permeability oil well

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Example 1: Hydrogenation hot gas chemical stimulation operation of No. 1 oil well in Daqing Oilfield

[0042] Geological conditions and related parameters of oil well No. 1: reservoir series sandstone and siltstone; medium-porosity and low-permeability oil layers; inner diameter of casing The well depth is 1241m; the artificial well bottom is 1231.2m; the perforation range is 1175.5-1146.0m; the daily fluid production before the stimulation operation is 3.2t, of which the daily oil production is 2.5t; the volume of the reaction zone is 988L from the above data. Prepare No. 1 solution 520kg, No. 2 solution 520kg.

[0043] Solution No. 1 contains: Ammonium Nitrate NH 4 NO 3 , ammonium chloride NH 4 Cl, urea CO(NH 2 ) 2 , urea nitrate CO(NH 2 ) 2 ·HNO 3 , Glucose C 6 h 12 o 6 , water H 2 O, the respective mass percentages: 59%, 9%, 12%, 5%, 0.5%, 14.5%. The mass of each component is: ammonium nitrate 306.8kg, ammonium chloride 46.8kg, urea 62.4kg, urea nitrat...

Embodiment 2

[0047] Example 2: Hydrogenation hot gas chemical stimulation operation of No. 2 oil well in Daqing Oilfield

[0048] Geological conditions and related parameters of oil well No. 2: reservoir series sandstone and siltstone; medium-porosity and low-permeability oil layers; inner diameter of casing The well depth is 1280.1m; the artificial well bottom is 1282.03m; the perforation range is 1208.2-1182.2m; the daily fluid production before the stimulation operation is 4.3t, of which the daily oil production is 4.0t; the volume of the reaction zone is 1158L based on the above data. Prepare No. 1 solution 715kg, No. 2 solution 715kg.

[0049] Solution No. 1 contains: Ammonium Nitrate NH 4 NO 3 , ammonium chloride NH 4 CI, urea CO(NH 2 ) 2 , urea nitrate CO(NH 2 ) 2 ·HNO 3 , Glucose C 6 h 12 o 6 , water H 2 O, the respective mass percentages: 53%, 8.7%, 11.2%, 4.6%, 1.5%, 21%. The masses of each component are: ammonium nitrate 378.95kg, ammonium chloride 62.205kg, urea 8...

Embodiment 3

[0053] Example 3: Hydrogenation hot gas chemical stimulation operation of No. 3 oil well in Daqing Oilfield

[0054] Geological conditions and related parameters of oil well No. 3: reservoir series sandstone and siltstone; medium-porosity and low-permeability oil layers; inner diameter of casing The well depth is 1003.1m; the artificial well bottom is 1005.25m; the perforation range is 963.8-940.6m; the well was an abandoned well before the stimulation operation, and the daily oil production was 0t; from the above data, it can be concluded that the volume of the reaction zone is 750L. Prepare No. 1 solution 455kg, No. 2 solution 455kg.

[0055] Solution No. 1 contains: Ammonium Nitrate NH 4 NO 3 , ammonium chloride NH 4 Cl, urea CO(NH 2 ) 2 , urea nitrate CO(NH 2 ) 2 ·HNO 3 , Glucose C 6 h 12 o 6 , water H 2 O, the respective mass percentages: 55%, 10%, 12.5%, 4%, 1%, 17.5%. The mass of each component is: ammonium nitrate 250.25kg, ammonium chloride 45.5kg, urea ...

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Abstract

The invention belongs to the technical field of oil exploitation, and particularly relates to a hydrogenation hot gas chemical yield increasing solution component capable of being used for increasing productivity of a low-yield low-permeability oil well. The solution component comprises first solution and second solution, the mass ratio of the first solution to the second solution is 1:1, the first solution comprises ammonium nitrate, ammonium chloride, urea, urea nitrate, glucose and water, and the second solution comprises sodium nitrite, urea, aluminum dodecaboride and carbon dichloride. The first solution and the second solution react, carry energy, penetrate through a well-cased perforating area of the oil well at a high speed and enter micro-cracks and air holes of near wellbore region rock strata, the micro-cracks can be broken through under the action of high-temperature high-pressure gas, oil-gas seepage channels are communicated, seepage resistance is decreased, drainage area is increased, accordingly, permeability of the near wellbore region rock strata is improved, and further the productivity of the individual well is increased.

Description

technical field [0001] The invention belongs to the technical field of petroleum exploitation, and in particular relates to a solution component for chemical stimulation of hydrogenated hot gas which can be used to improve the production capacity of low-yield and low-permeability oil wells. Background technique [0002] In my country, low-permeability oil and gas fields are widely distributed in various oil and gas regions across the country, with proven reserves of 6.3 billion tons, accounting for about 28% of the total proven reserves. Commonly used low-permeability oilfield development stimulation technologies mainly include fracturing technology, acidizing technology, and intralayer explosion stimulation technology. [0003] Fracturing technology, injecting high-pressure water exceeding the fracture degree of the rock into the reservoir to break the reservoir rock and form oil and gas seepage channels. During the fracturing process, proppant is used, the construction is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/68C09K8/74C09K8/592E21B43/26E21B43/27E21B43/22E21B43/24
Inventor 韩炜周亮西莫年科·阿列克谢谢尔比娜·卡琳娜斯托罗吉·叶夫根尼
Owner 吉林贯通能源科技有限责任公司
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