Novel integration technique for improving recovery ratio of thick oil with high thickness and low yield

A recovery factor and heavy oil technology, applied in the fields of fluid extraction, earthwork drilling, drilling composition, etc., can solve the problems of lower crude oil quality, consumption of thin oil resources, hindering industrial development, etc., and achieve high applicability, Enhanced oil recovery and the effect of technological progress

Active Publication Date: 2010-10-06
XINJIANG DELAND
0 Cites 7 Cited by

AI-Extracted Technical Summary

Problems solved by technology

Due to the high viscosity of heavy oil, the method of blending thin oil is mostly used to reduce the viscosity, but today, the production of thin oil is decreasing day by day, the thick oil mixed with thin oil viscosity reduction technology has encountered severe challenges; There are only thin oil resources, and the inherent characteristics of heavy oil are also destroyed, which greatly increases the cost of crude oil extraction
[0004] At present, the production of heavy oil is mainly mixed with thinner oil for viscosity reduction (ratio of mixed with thinner oil>1), which can solve the p...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Abstract

The invention provides a novel integration technique for improving a recovery ratio of thick oil with high thickness and low yield. The technique comprises the following steps of: extracting the thick oil: preparing a thick oil dispersing drag reducer into 1 percent aqueous solution serving as a sample a and 0.125 percent aqueous solution serving as a sample b, mixing 1,900-2,500 milligrams/liter of sample a and 230-280 milligrams/liter of sample b uniformly, and injecting the mixture in a well by using a casing, mixing medicaments on the pump with the thick oil to form an oil-in-water emulsion, lifting the emulsion to the mouth of the well by an oil pumping unit, and feeding the emulsion in an oil-water separating tank through a pipeline; breaking the emulsion and separating water from oil: adding a corresponding amount of efficient thick oil demulsifier continuously to prepare 1 percent aqueous solution while the thick oil enters the oil-water separating tank, wherein the adding amount is 90-110 milligrams/liter, and the reaction time is more than 2 hours, namely, oil-water separated sewage is to be treated; treating and recycling the sewage: pumping the sewage in the tank, adding a special coagulant to prepare 2 percent solution, wherein the adding amount is 80-120 milligrams/liter, adding a composite anti-incrustation corrosion inhibitor simultaneously to prepare 2 percent aqueous solution, wherein the adding amount is 48-53 milligrams/liter; adding a DL-328 industrial sterilant to prepare 5 percent aqueous solution, wherein the adding amount is 85-115 milligrams/liter, and blending with clear water, and injecting in the stratum to retain the pressure balance of the stratum.

Application Domain

Dewatering/demulsification with chemical meansFluid removal +5

Technology Topic

ChemistryIntegrated technology +10

Image

  • Novel integration technique for improving recovery ratio of thick oil with high thickness and low yield

Examples

  • Experimental program(1)

Example Embodiment

[0026] Example
[0027] Test site: Forty oil wells in an oil field in Xinjiang; the average viscosity of the original oil sample is 90,000 mPa·s at 50°C.
[0028] A set of comparisons: using conventional thin oil blending and viscosity reduction technology, 16 tons of thin oil per day, 37 tons of mixed liquid production, 21 tons of formation liquid, of which 18 tons of oil production, 6 tons of water production, and the viscosity of the wellhead liquid production at 50℃ is 900mPa ·S;
[0029] Using self-made heavy oil dispersion drag reducer, injection of 1% A and B 0.125% aqueous solution, daily injection volume of 6 tons, mixed liquid production of 37 tons, formation liquid production of 31 tons, of which 22.86 tons of oil production, 8.14 formation water production Tons, the viscosity of the wellhead production fluid is 150mPa·s at 50℃, the viscosity reduction rate is greater than 99%, and the daily saving of thin oil is 16 tons.
[0030] The second group of control: using conventional demulsifiers, the requirements of demulsification can not be reached after increasing the dosage;
[0031] Using self-made high-efficiency heavy oil demulsifier, the dosage is reduced to 100mg/L, which fully meets the demulsification requirements; the water content in the crude oil after oil-water separation is less than 1%.
[0032] Three groups of controls: using conventional decontamination agents, sewage oil content is 60mg/L, suspended solids is 130mg/L, because most of the disperse rent reducer is dissolved in the sewage, sewage treatment is more difficult;
[0033] Using self-made special coagulant, add 100mg/L of special coagulant before the flow degreasing sedimentation tank, the oil content in the treated water is 0.23mg/L, and the suspended matter is less than 3mg/L.
[0034] Four groups of controls: using conventional disinfectant, the sewage contains saprophytic bacteria 4.3*10 7 Pcs/ml, iron bacteria 5.9*10 6 Pcs/ml, sulfate reducing bacteria 3.3*10 6 Pcs/ml;
[0035] Using self-made DL-328 industrial sterilant, adding 100mg/L, the number of saprophytes is 0/ml, the sterilization rate is 100%, and the number of iron bacteria is 1.2*10 5 Pieces/ml, the sterilization rate is 98%, and the number of sulfate-reducing bacteria is 1.7*10 5 Pieces/ml, the sterilization rate is 95%.
[0036] Five groups of controls: the oil field water salinity before mining is 300,000 mg/L, which is easy to scale and corrode water quality;
[0037] Using self-made composite scale and corrosion inhibitor, adding 50mg/L, the scale inhibition rate can be 100%, and the corrosion inhibition rate is 97%.
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

no PUM

Description & Claims & Application Information

We can also present the details of the Description, Claims and Application information to help users get a comprehensive understanding of the technical details of the patent, such as background art, summary of invention, brief description of drawings, description of embodiments, and other original content. On the other hand, users can also determine the specific scope of protection of the technology through the list of claims; as well as understand the changes in the life cycle of the technology with the presentation of the patent timeline. Login to view more.
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Similar technology patents

Method for harmless treatment of oil sludge sand

InactiveCN110746063AEORIncrease methane gas productionWaste water treatment from quariesWater contaminantsOil productionWaste treatment technologies
Owner:CHINA PETROLEUM & CHEM CORP +1

Method for exploiting heavy oil reservoir by terrestrial heat

ActiveCN111608624ALow costEORGeothermal energy generationFluid removalInjection wellHeavy oil reservoir
Owner:CHINA PETROLEUM & CHEM CORP +1

Classification and recommendation of technical efficacy words

  • Improve applicability
  • EOR

Built-in swing mechanism of rotary fan

ActiveUS20080304969A1Increase wind outlet surfaceImprove applicabilityPropellersPump componentsDrive motorSpherical form
Owner:KING JIH ENTERPRISE CORP

Method for driving crude oil out by microorgans in crude oil

Owner:OIL EXTRACTION TECH INST OF SINOPEC SHENGLI OILFIELD

Method for relieving water blocking at high temperature in oil and gas exploitation process

InactiveCN103790552AEORReduce water saturationInsulationHeating timeFormation water
Owner:SOUTHWEST PETROLEUM UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products