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Microorganism and lipopeptide combined low-temperature oil reservoir oil extraction and paraffin removal and inhibition technology

A low-temperature oil, wax removal and anti-wax technology, applied in the direction of drilling compositions, chemical instruments and methods, etc., can solve problems such as blockage of oil extraction pipes and transportation pipelines, slow development, microbial oil recovery restrictions, etc., and achieve enhanced oil recovery , the effect of improving performance

Inactive Publication Date: 2014-03-05
BEIJING JIEBOTE ENERGY TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the 1960s, my country began to study microbial oil recovery technology, but the development was slow
[0003] However, microbial oil recovery is limited by the temperature of the reservoir. Generally, microorganisms for oil recovery can only be used in oil reservoirs at 30-70°C. If the temperature is higher than 70°C, or the temperature is lower than 25°C, microbial oil recovery will be greatly restricted.
However, the nature of geological crude oil is very complex, especially in formations with low temperature and high waxy content, both microbial oil recovery and surfactant oil recovery will be greatly restricted
Most surfactants have little effect on wax removal and prevention of high waxy crude oil, causing blockage of oil extraction pipes and transportation pipelines

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0010] A combination of microorganisms and lipopeptides for oil recovery and wax removal in low-temperature oil reservoirs. The preservation number is CGMCC No. 1.0544. Leuconostoc enteritidis is mixed with 0.5% lipopeptide. The volume ratio to 0.5% lipopeptide solution is 1:1; the oil recovery medium formula is (g / L): glucose 5, peptone 2, potassium dihydrogen phosphate 0.3, disodium hydrogen phosphate dodecahydrate 1.4, magnesium sulfate heptahydrate 0.25.

[0011] Experiment of lipopeptide and microbial combination solution on oil emulsification and wax removal at 20°C in Yanchang Oilfield.

[0012] The oil sample from Well Gao in Yanchang Oilfield has a wax content of 18% and a formation temperature of about 20°C, which belongs to high wax content and low temperature oil reservoirs. In the laboratory test, add 100ml of culture medium to 250ml Erlenmeyer flask respectively (the medium formula is g / L: glucose 5, peptone 2, potassium dihydrogen phosphate 0.3, disodium hydrog...

example 2

[0014] A combination of microorganisms and lipopeptides for oil recovery and wax removal in low-temperature oil reservoirs. The preservation number is CGMCC No. 1.0544. Leuconostoc enteritidis is mixed with 0.5% lipopeptide. The volume ratio to 0.5% lipopeptide solution is 1:1; the oil recovery medium formula is (g / L): glucose 5, peptone 2, potassium dihydrogen phosphate 0.3, disodium hydrogen phosphate dodecahydrate 1.4, magnesium sulfate heptahydrate 0.25.

[0015] Experiment of lipopeptide and microbial combination solution on oil emulsification and wax removal at 30°C in Yanchang Oilfield.

[0016] The oil sample from a well in Yanchang Oilfield has a wax content of 18%. The indoor test is to add 100ml of culture medium to a 250ml Erlenmeyer flask, (the culture medium formula is g / L: glucose 5, peptone 2, potassium dihydrogen phosphate 0.3 , disodium hydrogen phosphate dodecahydrate 1.4, magnesium sulfate heptahydrate 0.25), crude oil 10ml, lipopeptide and microorganism m...

example 3

[0018] Experiment of lipopeptide and microbial combination solution on oil emulsification and wax removal in Yanchang Oilfield at 18°C.

[0019] The oil sample from a well in Yanchang Oilfield has a wax content of 18%. In the indoor test, add 100ml of medium to a 250ml Erlenmeyer flask, (the formula of the medium is g / L: glucose 5, peptone 2, potassium dihydrogen phosphate 0.3, disodium hydrogen phosphate dodecahydrate 1.4, magnesium sulfate heptahydrate 0.25) , 10ml of crude oil, 1.5ml of lipopeptide-microbial mixture solution prepared by inoculation, sealed in a plastic bag, and shaken in a water bath at 15°C for 48h. The result was that the oil sample was mixed evenly and turned grayish yellow. Microscopically, the bacteria grew well. After standing at 18°C ​​for 24 hours, the crude oil did not agglomerate, and small oil droplets dispersed. Wax crude oil has good emulsification, clearing and anti-wax effect.

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Abstract

The present invention discloses a microorganism and lipopeptide combined low-temperature oil reservoir oil extraction and paraffin removal and inhibition technology, which is characterized in that the selected microorganism is Leuconostoc mesenteroides subsp.mesenteroides, the preservation number is CGMCC NO.1.0544, the surfactant matched with the microorganism is a lipopeptide, the oil extraction formula comprises 5 g / L of glucose, 2 g / L of peptone, 0.3 g / L of potassium dihydrogen phosphate, 1.4 g / L of disodium hydrogen phosphate dodecahydrate and 0.25 g / L of magnesium sulfate heptahydrate, and water with a pH value of 7-8 is injected. The technology can be applied for the low-temperature oil reservoir with the temperature of 10-37 DEG C, and provides good effects of emulsification, viscosity reduction, and paraffin removal and inhibition for crude oil, especially for highly waxy crude oil, wherein the optimal application temperature is 18-27 DEG C.

Description

technical field [0001] The invention relates to a technology for oil recovery and wax removal and prevention by microorganisms and surfactants, in particular to a technology for oil recovery and wax removal and prevention in low-temperature oil reservoirs composed of Leuconostoc enterococci and lipopeptide. Background technique [0002] In the 1960s, my country began to study microbial oil recovery technology, but the development was slow. In the late 1980s, Daqing Oilfield took the lead in carrying out microbial underground fermentation experiments (30°C) in two wells. Later, oilfield fluids in Dagang, Shengli, Changqing, Liaohe, Xinjiang, etc. carried out single well huff and puff tests. At the end of 2000, Dongxin Oil Production Plant of Shengli Oilfield introduced high-temperature-resistant strains from NPC Company of the United States, and carried out high-temperature-resistant microbial flooding enhanced oil recovery research and field tests in the Y-16 well group. Th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/524C09K8/582C09K8/584
CPCC09K8/582C09K8/524C09K8/584
Inventor 陈亮曲红涛
Owner BEIJING JIEBOTE ENERGY TECH
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