Unlock instant, AI-driven research and patent intelligence for your innovation.

A steam flooding production method of heavy oil reservoir

A technology of heavy oil reservoirs and production methods, applied in production fluids, chemical instruments and methods, earthwork drilling and production, etc.

Active Publication Date: 2016-04-27
CHINA PETROLEUM & CHEM CORP +1
View PDF7 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So far, there is no report on the use of sulfonated phenolic resin in the field of heavy oil production

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] For the Shengli Gudao block oilfield, choose four 70m wells apart from the nine-point injection-production well group, the boiler steam outlet temperature is 300℃, the steam injection rate is 1.8t / (d·ha·m), and the daily steam injection of the well group is 540t , Single well 120~150t, according to the oil displacement agent and steam mass ratio of 0.5:100 at the same time inject oil displacement agent (sulfonated phenoxyacetate phenol formaldehyde resin, the mass fraction of polycondensation monomer sulfur is about 10.8%, the number average molecular weight is in Between 40,000 and 50,000, nonylphenol polyoxyethylene ether sulfate, NPES-428, a product of Foshan Kede Chemical Technology Co., Ltd., the mass ratio of the two is 70:30), the recovery and injection ratio is 1.2, the oil layer pressure It is controlled below 4MPa, and the bottom hole dryness is greater than 50%. A total of 54.1×10 steam injection during the entire test phase 4 t, oil injection and displacement...

Embodiment 2

[0036] For the Shengli Danjiasi block oilfield, select four 100m well spacing inverse nine-point injection-production well group, boiler steam outlet temperature is 280℃, steam injection rate is 1.5t / (d·ha·m), well group daily injection Steam is 460t, single well is 110~140t, and the oil displacement agent (sulfonated phenol formaldehyde resin, the mass fraction of sulfur is about 7.3%, and the number average molecular weight is between 6000 and 8000. In the meantime, stearyl alcohol polyoxyethylene ether, Pingpingjia O-10, Yixing Jiajia Chemical Co., Ltd. product, the mass ratio of the two is 60:40), the production injection ratio is 1.2, the oil layer pressure is controlled below 4MPa, the bottom of the well Dryness is greater than 50%. A total of 38.4×10 steam injection during the entire test phase 4 t, oil injection and displacement agent 1.9×10 3 t, oil output 9.5×10 4 t, the stage oil-steam ratio is 0.25, and the steam flooding recovery degree is 21.05%.

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

PropertyMeasurementUnit
degree of polymerizationaaaaaaaaaa
drynessaaaaaaaaaa
Login to View More

Abstract

The invention relates to a steam flooding mining method of a heavy oil reservoir. The method includes: water solution of oil-displacing agent is injected in an oil reservoir layer while steam flooding mining is carried out; according to mass parts, the oil-displacing agent contains 0.001-29 parts of sodium salt and / or calcium salt of sulphonate phenolic resin, 0.001-20 parts of oil-displacing nonionic surface active agent and / or oil-displacing nonionic-anionic surface active agent; the number-average molar mass of the sulphonate phenolic resin is 2000-200000, in the sulphonate phenolic resin, mass fraction of sulfur is 5%-20%. In the method, the oil-displacing agent is used to assist and intensify the steam flooding mining of the heavy oil reservoir, and accordingly heat utilization efficiency and recovery efficiency of the steam flooding mining can be enhanced, and steam flooding mining effect is improved.

Description

Technical field [0001] The invention relates to a steam flooding exploitation method for heavy oil reservoirs. Background technique [0002] In recent years, as the demand for oil continues to rise and the output of conventional crude oil continues to decrease, the development of heavy oil is deepening year by year. The main methods of heavy oil production are thermal oil production, including steam huff and puff, steam flooding, and oil burning. Among them, steam flooding is to continuously inject high-dryness steam into the oil layer to heat the oil layer through the injection-production well pattern, and drive the heavy oil to the periphery of the production well to be produced. Its impact range is large and the recovery rate high. Moreover, steam flooding, as the main means to increase oil recovery after steam stimulation, has been applied in large-scale industrialization abroad, and the recovery has increased significantly. The characteristics of domestic heavy oil reserv...

Claims

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

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): E21B43/22E21B43/24C09K8/592C09K8/588C09K8/584
Inventor 秦冰黄娟纪洪波李财富
Owner CHINA PETROLEUM & CHEM CORP