Hydrogenation heat gas chemical yield increasing solution component for low-permeability sandstone reservoir oil well

A chemical stimulation and low permeability technology, applied in drilling compositions, chemical instruments and methods, wellbore/well components, etc., can solve problems such as difficult control

Active Publication Date: 2014-06-04
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

When preparing fracturing fluid, it is necessary to ensure its anti-swelling performance, drainage aid performance, gel breaking performance, fluid loss resistance, temperature resistance and other characteristics. Only strict requirements for each step can ensure the performance and quality of the fracturing fluid. The ultimate success of fracturing construction is difficult to control in actual operation

Method used

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  • Hydrogenation heat gas chemical yield increasing solution component for low-permeability sandstone reservoir oil well

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Example 1: Hydrogenation Hot Gas Chemical Stimulation Test of No. 1 Oil Well in Daqing Oilfield

[0039] 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 121.36mm, artificial well bottom 1428.3m; perforation range 1338.2 ~ 1367.5m; daily fluid production before stimulation operation was 2.5t, of which daily oil production was 2.0t; from the above data it can be concluded that the volume of the reaction zone is 1045L. Prepare No. 1 solution 650kg, No. 2 solution 650kg.

[0040] The ingredients of solution No. 1 include: ethanolamine nitrate complex HOCH 2 CH 2 NH 2 ·HNO 3 , ammonium nitrate NH 4 NO 3 , water H 2 O, the respective mass percentages: 30%, 48.5%, 21.5%. The mass of each component is respectively: 195kg of nitroethanolamine complex, 315.25kg of ammonium nitrate, and 139.75kg of water.

[0041] Components of solution No. ...

Embodiment 2

[0044] Example 2: Hydrogenation Hot Gas Chemical Stimulation Test of No. 2 Oil Well in Daqing Oilfield

[0045] 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 121.36mm, artificial well bottom 1380.6m; perforation range 1293.0-1320.2m; daily fluid production before stimulation operation 3.0t, of which daily oil production is 2.5t; from the above data, the volume of the reaction zone is 1016.2L. Prepare No. 1 solution 650kg, No. 2 solution 650kg.

[0046] The ingredients of solution No. 1 include: ethanolamine nitrate complex HOCH 2 CH 2 NH 2 ·HNO 3 , ammonium nitrate NH 4 NO 3 , water H 2 O, the respective mass percentages: 40%, 45.3%, 14.7%. The mass of each component is respectively: 260 kg of ethanolamine nitrate complex, 294.45 kg of ammonium nitrate, and 95.55 kg of water.

[0047] Components of solution No. 2 include: hydrazine nit...

Embodiment 3

[0050] Example 3: Hydrogenation hot gas chemical stimulation test of No. 3 oil well in Daqing Oilfield

[0051] 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 121.36mm, artificial well bottom 1217.6m; perforation range 1145.3 ~ 1176.0m; the well was abandoned before the stimulation operation, with a daily oil production of 0t; from the above data, the volume of the reaction zone is 839L. Prepare No. 1 solution 520kg, No. 2 solution 520kg.

[0052] The ingredients of solution No. 1 include: ethanolamine nitrate complex HOCH 2 CH 2 NH 2 ·HNO 3 , ammonium nitrate NH 4 NO 3 , water H 2 O, the respective mass percentages: 35%, 54.6%, 10.4%. The masses of each component are: 182kg of ethanolamine nitrate complex, 283.92kg of ammonium nitrate, and 54.08kg of water.

[0053] Components of solution No. 2 include: hydrazine nitrate N 2 h 4 ·HNO...

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Abstract

The invention belongs to the technical field of oil exploitation, and particularly relates to a hydrogenation heat gas chemical yield increasing solution component capable of being used for increasing productivity of a low-permeability sandstone reservoir 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, by the mass sum of 100%, the first solution comprises nitric acid cholamine complex HOCH2CH2NH2*HNO3, ammonium nitrate NH4NO3 and water H2O, and the second solution comprises hydrazine nitrate N2H4*HNO3, sodium hydride NaH, sodium aluminum hydride NaAlH4 and tetrachloroethylene C2Cl4. Gas released in reaction of the first solution and the second solution can carry heat and enter air holes and micro-cracks of near wellbore region rock strata through a well-cased perforating area, the near wellbore region rock strata can generate new cracks under continuous heat shock action of high-temperature high-pressure gas, oil-gas seepage channels are communicated, seepage resistance is decreased, drainage area is increased, and accordingly, permeability of the near wellbore region rock strata is improved.

Description

technical field [0001] The invention belongs to the technical field of petroleum exploitation, and in particular relates to a solution component of hydrogenation hot gas chemical stimulation that can be used to improve the production capacity of oil wells in low-permeability sandstone reservoirs. Background technique [0002] Low-permeability sandstone reservoirs have the characteristics of strong heterogeneity, reservoir productivity is greatly affected by lithology and physical factors, and natural productivity is low. Reservoirs need to be modified to see better development results. Hydraulic fracturing is It is a common method for stimulation of low-permeability sandstone reservoirs. [0003] Hydraulic fracturing uses high-pressure pumps on the ground to pump high-viscosity fracturing fluid into the well. When the fluid pressure in the fracturing section reaches a certain value, the fracture opens. With the addition of proppant (usually ceramsite), the fracture gradually...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/68C09K8/592E21B43/26E21B43/22E21B43/24
Inventor 西莫年科·阿列克谢韩炜周亮李子璇
Owner 吉林贯通能源科技有限责任公司
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