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Preparation and application of lipopeptide solution for low porosity and low permeability oil field displacement

An oil field and solution technology, which is applied in the preparation method of peptides, drilling compositions, peptides, etc., can solve problems such as formation scaling and blockage, and achieve the effect of enhancing the comprehensive effect

Active 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

Ordinary surfactants for oil displacement, such as: sodium petroleum sulfonate, betaine, etc., are only effective in emulsifying and reducing the viscosity of crude oil when alkali is added, and in the process of use, it is easy to cause formation scaling and plugging, so Not used in low porosity and low permeability reservoirs

Method used

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  • Preparation and application of lipopeptide solution for low porosity and low permeability oil field displacement
  • Preparation and application of lipopeptide solution for low porosity and low permeability oil field displacement

Examples

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example 1

[0012] Heat the fermentation waste liquid with steam to 90°C, keep it warm for 20 minutes, detect bacteria-free bodies with spores by microscope smear, cool to 40°C and pour into the batching tank, add self-made lipopeptide powder in batches, adjust the pH to 9 with sodium hydroxide at all times, and stir until After complete dissolution, ultracentrifuge at 19000r / min and control the flow rate to obtain a clear lipopeptide solution. Most formations in Yanchang Oilfield have a permeability of about 1 mD and a porosity of about 10%, which belong to low-porosity and low-permeability formations. The lipopeptide solution was tested in a single well in an oil production plant in Yanchang Oilfield in July 2009. The oil increase rate is as high as 500%, and it stabilizes at about 100% in the later period, and the validity period is about 30 days. From December 2009 to December 2010, four water injection well groups were flooded with lipopeptide solution in an oil production plant in Y...

example 2

[0014] Heat the fermentation waste liquid with steam to 80°C, keep it warm for 30 minutes, detect bacteria-free bodies with spores on a microscope smear, cool to 30°C and pour into the batching tank, add self-made lipopeptide powder in batches, adjust the pH to 9 with sodium hydroxide at all times, and stir until After complete dissolution, ultracentrifuge at 18000r / min and control the flow rate to obtain a clear lipopeptide solution. The average porosity of the main well area of ​​the West Liugong fault block in the No. 1 Oil Production Plant of Huabei Oilfield is 17.7%, and the permeability is 17.1×10 -3 um 2 , is a medium-porosity, low-permeability oil reservoir, gradually getting worse toward the west, with an average porosity of 15.1%, and a permeability of 7×10 -3 um 2 , is a medium-porosity, ultra-low permeability reservoir. The lipopeptide solution was applied in this work area. By October 2012, a total of 25 wells were constructed, providing 200 tons of lipopeptide...

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Abstract

The present invention discloses preparation and an application of a lipopeptide solution for low porosity and low permeability oil field displacement. According to the present invention, a lipopeptide fermentation waste solution being subjected to heat denaturation is adjusted to achieve the pH value of 8-9 to replace water so as to prepare a lipopeptide solution, and bacterial, spores and large particle impurities are removed through 18000 r / min ultracentrifugation to obtain a clarified lipopeptide solution containing various lipopeptide fermentation metabolism organic acids, phospholipids and other surface active substances; and the lipopeptide solution provides characteristics of better emulsification and viscosity reduction effect and better permeability on stratum for crude oil compared with the simple lipopeptide solution, is especially for low porosity and low permeability oil field displacement, and has advantages of easy degradation, strong penetration, no scaling, environmental protection and the like.

Description

technical field [0001] The invention relates to a preparation method of a lipopeptide solution, in particular to the application of a lipopeptide solution in low-porosity and low-permeability oil field displacement. Background technique [0002] With the shortage of energy in the world, the full recovery and rational utilization of oil has become a matter of great importance to all countries. Due to the conventional primary and secondary oil recovery, the total oil recovery rate can only reach 20-40%, and the highest is 50%. In the case of increasingly tense energy resources, improving oil recovery has become a major topic in oil recovery research, and tertiary oil recovery is a particularly effective method for improving oil recovery, and surfactant oil recovery is one of the very important methods in tertiary oil recovery. one. [0003] Low-porosity and low-permeability reservoirs have low permeability, small pore throat radius, and low porosity. During the long-term wate...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07K1/14C09K8/584
Inventor 陈亮曲红涛
Owner BEIJING JIEBOTE ENERGY TECH
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