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Heavy oil well single-well throughput oil production method

A technology for oil wells and oil layers, applied in the field of tertiary oil recovery, can solve problems such as process measures affecting the utilization rate of oil wells, the degree of effective utilization of heat energy is deteriorated, and the effect of steam huff and puff is deteriorated. long-term effect

Active Publication Date: 2016-08-31
YANTAI ZHIBEN INTPROP OPERATIONS MANAGEMENT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the steam huff and puff technology has the following problems: (1) The cost of generating steam is high, especially in areas where water resources are scarce and expensive, and water treatment costs are high; (2) Due to steam injection, oil well heat loss, sand production Casing damage and other serious conditions affect the utilization rate of oil wells and the implementation of process measures; (3) With the increase of steam stimulation rounds, the water content in the near wellbore area rises, which consumes most of the steam heat, and the degree of effective utilization of heat energy becomes smaller. (4) Some heavy oil wells completed without thermal recovery cannot inject steam

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Oil well B in an oil field 3 , oil reservoir temperature 82℃, crude oil viscosity 3240mPa.s, formation water salinity 12590mg / L, permeability 250×10 -3 μm 2 , The thickness of the oil layer is 2.5m, the porosity is 0.325, and the well spacing is 120m. Before the test, the daily oil production of the well was 4.3t, and the daily liquid production was 120m 3 , water content 96.4%, utilize the method of the present invention in oil well B 3 To implement single well huff and puff field test, the specific implementation steps are as follows:

[0039] 1. Test oil well screening

[0040] Oil well screening criteria are oil reservoir temperature <90°C, crude oil viscosity <5000mPa.s, formation water salinity

[0041] 100×10 -3 μm 2 and oil layer thickness greater than 2m; oil well B 3 The reservoir temperature is 82°C, the viscosity of crude oil is 3240mPa.s, the salinity of formation water is 12590mg / L, and the permeability is 250×10 -3 μm 2 1. The thickness of oil la...

Embodiment 2

[0053] Oil well D in an oil field 1 , oil reservoir temperature 73℃, crude oil viscosity 3860mPa.s, formation water salinity 8970mg / L, permeability 800×10 -3 μm 2 , The thickness of the oil layer is 6.2m, the porosity is 0.302, and the well spacing is 180m. Before the test, the daily oil production of the well was 8.5t, and the daily liquid production was 180m 3 , water content 95.3%, utilize the method of the present invention in oil well D 1 To implement single well huff and puff field test, the specific implementation steps are as follows:

[0054] 1. Test oil well screening

[0055] Oil well screening criteria are oil reservoir temperature <90°C, crude oil viscosity <5000mPa.s, formation water salinity

[0056] 100×10 -3 μm 2 and oil layer thickness greater than 2m; oil well D 1 The reservoir temperature is 73℃, crude oil viscosity is 3860mPa.s, formation water salinity is 8970mg / L, and permeability is 800×10 -3 μm 2 1. The thickness of oil layer is 6.2m, which me...

Embodiment 3

[0068] Oil well G in an oil field 2 , reservoir temperature 65℃, crude oil viscosity 2785mPa.s, formation water salinity 5670mg / L, permeability 650×10 -3 μm 2 , The thickness of the oil layer is 4.0m, the porosity is 0.312, and the well spacing is 150m. Before the test, the daily oil production of the well was 6.3t, and the daily liquid production was 150m 3 , water content 95.8%, utilize the method of the present invention in oil well G 2 To implement single well huff and puff field test, the specific implementation steps are as follows:

[0069] 1. Test oil well screening

[0070] Oil well screening criteria are oil reservoir temperature <90°C, crude oil viscosity <5000mPa.s, formation water salinity

[0071] 100×10 -3 μm 2 and oil layer thickness greater than 2m; oil well G 2 Reservoir temperature 65°C, crude oil viscosity 2785mPa.s, formation water salinity 5670mg / L, permeability 650×10 -3 μm 2 1. The thickness of oil layer is 4.0m, which meets the screening stand...

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Abstract

The invention belongs to the technical field of tertiary oil production, and particularly relates to a heavy oil well single-well throughput oil production method. The method concretely comprises the following steps of test oil well screening, single-well throughput process selection, and field test. The single-well throughput process is selected by aiming at the characteristics of a heavy oil well; and the oil-water mobility ratio is well reduced, so that the single-well yield of the heavy oil well can be effectively improved. Meanwhile, the heavy oil well single-well throughput oil production method has the characteristics of simple process, high operability and long validity period. Therefore the method can be widely applied to the field test for improving the single-well yield of the heavy oil well.

Description

technical field [0001] The invention relates to a method for tertiary oil recovery, in particular to a single well huff and puff oil recovery method for heavy oil wells. Background technique [0002] my country's onshore heavy oil resources account for more than 20% of the total petroleum resources. The national heavy oil resources are about 19.87 billion tons, and the proven geological reserves of heavy oil are about 2.06 billion tons. The crude oil production of heavy oil reservoirs has reached 7% of the total crude oil production, and the development of heavy oil has become an important part of crude oil production in my country. And with the reduction of light oil production reserves, the proportion of heavy oil production will continue to increase. [0003] Due to the high content of asphalt colloid and low wax content, heavy oil has high viscosity, difficult flow, and great difficulty in mining. At present, steam stimulation technology is the main method of heavy oil ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/24E21B43/16E21B43/22C09K8/582C09K8/584C09K8/594
CPCC09K8/582C09K8/584C09K8/594E21B43/16E21B43/164E21B43/24
Inventor 王敏
Owner YANTAI ZHIBEN INTPROP OPERATIONS MANAGEMENT CO LTD
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