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

A carbonate rock reservoir, chemical stimulation technology, applied in drilling compositions, chemical instruments and methods, wellbore/well components, etc., can solve the problems of secondary pollution, high cost, complicated construction, etc.

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

In addition, large-scale operation equipment needs to be used, the construction is complicated, the cost is expensive, and some sediments are easy to cause secondary pollution

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Example 1: Hydrogenation Hot Gas Chemical Stimulation Test of Oil Well No. 1 in Sichuan Oilfield

[0043]Geological conditions and related parameters of No. 1 oil well: the lithology of the reservoir is mainly gray dolomite, limestone and dolomitic limestone; the average porosity is 9.7%, and the permeability is 46.2×10 -3 μm 2 ;Casing diameter The artificial well bottom is 6648m; the perforation range is 6526-6599m; the daily fluid production before the stimulation operation is 1.6t, of which the daily oil production is 0.3t; from the above data, the volume of the reaction zone is 1464L. Prepare No. 1 solution 780kg, No. 2 solution 780kg, and No. 3 solution 2340kg.

[0044] Solution No. 1 contains: Urea CO(NH 2 ) 2 , sodium nitrite NaNO 2 , hydrazine N 2 h 4 , water H 2 O, the respective mass percentages: 22%, 50%, 13%, 15%; the mass of each component is: urea 171.6kg, sodium nitrite 390kg, hydrazine 101.4kg, water 117kg.

[0045] Solution No. 2 contains: Alu...

Embodiment 2

[0049] Example 2: Hydrogenation Hot Gas Chemical Stimulation Test of Oil Well No. 2 in Sichuan Oilfield

[0050] Geological conditions and related parameters of oil well No. 2: The lithology of the reservoir is mainly gray dolomite, limestone and dolomitic limestone; the average porosity is 7.4%, and the permeability is 11.8×10 -3 μm 2 ;Casing diameter The artificial well bottom is 6801m; the perforation range is 6702-6783m; the daily fluid production before the stimulation operation is 1.2t, of which the daily oil production is 0.1t; the volume of the reaction zone is 1188L from the above data. Prepare No. 1 solution 715kg, No. 2 solution 715kg, and No. 3 solution 2145kg.

[0051] Solution No. 1 contains: Urea CO(NH 2 ) 2 , sodium nitrite NaNO 2 , hydrazine N 2 h 4 , water H 2 O, the respective mass percentages: 26%, 55%, 10%, 9%; the mass of each component is: urea 185.9kg, sodium nitrite 393.25kg, hydrazine 71.5kg, water 64.35kg.

[0052] Solution No. 2 contains: ...

Embodiment 3

[0056] Example 3: Hydrogenation hot gas chemical stimulation test of No. 3 oil well in Sichuan Oilfield

[0057] Geological conditions and related parameters of No. 3 oil well: the lithology of the reservoir is mainly gray dolomite, limestone and dolomitic limestone; the average porosity is 8.1%, and the permeability is 26.4×10 -3 μm 2 ;Casing diameter The artificial well bottom is 6231.5m; the perforation range is 6103-6197m; the daily fluid production before the stimulation operation is 2.0t, of which the daily oil production is 0.18t; the volume of the reaction zone is 1542L from the above data. Prepare No. 1 solution 910kg, No. 2 solution 910kg, and No. 3 solution 2730kg.

[0058] Solution No. 1 contains: Urea CO(NH 2 ) 2 , sodium nitrite NaNO 2 , hydrazine N 2 h 4 , water H 2 O, the respective mass percentages: 24%, 53%, 11%, 12%; the mass of each component is: urea 218.4kg, sodium nitrite 482.3kg, hydrazine 100.1kg, water 109.2kg.

[0059] Solution No. 2 contai...

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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 carbonate reservoir oil well. The solution component comprises first solution, second solution and third solution, the mass ratio of the first solution, the second solution and the third solution is 1:1:3, the first solution comprises urea CO(NH2)2, sodium nitrite NaNO2, hydrazine N2H4 and water H2O, the second solution comprises aluminum chloride AlCl3, sodium hydride NaH, ammonium chloride NH4Cl and tetrachloroethylene C2Cl4, and the third solution comprises hydrochloric acid HCl, methenamine (CH2)6N4 and alkylphenol ethoxylate C9H19C6H4O(C2H4O)nH. Compared with an acidizing and fracturing process, a hydrogenation heat gas chemical method is simple in process, has the advantage of combination of heat recovery, fracturing and acidizing, is long in yield increasing duration and high in recovery ratio, and can be applied to carbonate oil reservoir exploitation.

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 productivity of oil wells in low-permeability carbonate rock reservoirs. Background technique [0002] Carbonate rock is an extremely important reservoir rock, accounting for 20% of the world's total area of ​​sedimentary rock, and its oil and gas reserves account for 50% of the world's total reserves. In recent years, my country has successively made major discoveries of carbonate rock oil and gas resources in Tarim, Sichuan and other regions. Carbonate reservoirs are characterized by deep burial, poor reservoir physical properties, strong heterogeneity, and low single well production. Acid fracturing technology is a common method for carbonate reservoir stimulation. [0003] Acid fracturing refers to the acidizing treatment process of squeezing the form...

Claims

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Application Information

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IPC IPC(8): C09K8/74C09K8/592E21B43/27E21B43/22E21B43/24
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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