Eureka AIR delivers breakthrough ideas for toughest innovation challenges, trusted by R&D personnel around the world.

Ultralow-temperature guanidine gum fracturing fluid

A guar gum fracturing fluid and ultra-low temperature technology, applied in the field of oil field fracturing, can solve problems such as low formation temperature, difficulty in breaking glue and hydration, etc., and achieve the effects of less pollution, convenient use and simple preparation process

Inactive Publication Date: 2014-01-01
PETROCHINA CO LTD
View PDF5 Cites 22 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the shallow burial depth and low formation temperature of oil and gas reservoirs, the decomposition temperature of commonly used persulfate gel breakers is ≥45°C, so it is difficult for conventional water-based guar gum fracturing fluids to break gel and hydrate in oil layers below 35°C

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

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Ultralow-temperature guanidine gum fracturing fluid
  • Ultralow-temperature guanidine gum fracturing fluid
  • Ultralow-temperature guanidine gum fracturing fluid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] ①15°C fracturing fluid stock solution formula: 0.3% HPGUR powder, 10% KCL, 0.5% XJHX-08, 1% ZJ-07 drainage aid, 0.3% KNF fungicide, 1% PR-1, 0.016% sodium hydroxide, 0.0004% gCuCL (cuprous chloride).

[0019] ②Preparation method: Take 1000ml of water and place it in a 1000ml volume Wuyin mixer, add 100g of KCL, stir to dissolve, add 3.0g of hydroxypropyl guanidine gum powder, stir for 2 minutes to dissolve and increase viscosity, then add 2ml of XJHX-08, 10ml of ZJ -07 drainage aid, 3ml KNF bactericide, 10ml PR-1 demulsifier, 0.16g sodium hydroxide + 0.004g cuprous chloride, stir evenly, place in a 1000ml beaker and let it stand for 4 hours to make a base liquid for later use.

[0020] ③Crosslinking liquid formula: 2.5% YGB organic boron crosslinking agent + 2% ammonium persulfate + 0.1% sodium hydroxide; take 100ml of water and put it in a 200ml beaker, add 2.5ml of YGB organic boron crosslinking agent, add over Ammonium sulfate 2g, stir well, then add 0.1g sodium hyd...

Embodiment 2

[0027] ①35°C fracturing fluid stock solution formula: 0.4% HPGUR powder, 10% KCL, 0.5% XJHX-08, 1% ZJ-07 drainage aid, 0.3% KNF fungicide, 1% PR-1, 0.02% sodium hydroxide, 0.0005% gCuCL (cuprous chloride).

[0028] ②Preparation method: Take 1000ml of water and place it in a 1000ml Wuyin mixer, add 100g of KCL, stir to dissolve, add 4.0g of hydroxypropyl guanidine gum powder, stir for 2 minutes to dissolve and increase viscosity, then add 2ml of XJHX-08, 10ml of ZJ -07 drainage aid, 3ml KNF bactericide, 10ml PR-1 demulsifier, 0.2g sodium hydroxide + 0.004g cuprous chloride, stir evenly, place in a 1000ml beaker and let it stand for 4 hours to make a base liquid for later use.

[0029] ③Crosslinking liquid formula: 2% YGB organic boron crosslinking agent + 1% ammonium persulfate + 0.03% sodium hydroxide; take 100ml of water and put it in a 200ml beaker, add 2g of YGB organic boron crosslinking agent, add persulfuric acid Ammonium 1g, stir well, then add 0.03g sodium hydroxide, ...

Embodiment 3

[0036] Well T10269 (T2K1: 738.5m-740.0m, 743.5m-748.0m) belongs to the Kexia Formation of the Karamay Formation oil reservoir, located 15km east of Karamay City, with an oil-bearing area of ​​16.9km 2 , geological reserves of 20.58 million tons. The oil reservoir is sandwiched between the Ke-Wu fault and the North Heiyoushan fault, and is a monocline structure dipping in the southeast. The lithology of the main oil-bearing series is mainly conglomerate and glutenite. It is manifested as weak speed sensitivity, weak salt sensitivity, and medium-strong water sensitivity. The average reservoir porosity is 16.1%, and the average permeability is 49×10 -3 μm 2 . It is medium porosity-medium low permeability reservoir. The original formation pressure of the Kexia Formation is 10.29MPa, the reservoir temperature is 24.5°C, and the formation crude oil viscosity is 7.2mPa.s.

[0037] The use of conventional fracturing methods will cause some thin layers to be stimulated poorly or ...

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
Breaker viscosityaaaaaaaaaa
Breaker viscosityaaaaaaaaaa
Permeabilityaaaaaaaaaa
Login to View More

Abstract

The invention relates to an ultralow-temperature guanidine gum fracturing fluid comprising 0.3%-0.45% of hydroxypropyl guar gum, 1-15% of KCl, 1-3% of a discharge aiding agent, 0.5-2% of a demulsifying agent, 0.5-2%% of a clay stabilizer, 0.1-0.5% of a fungicide, 0.01-0.03% of a pH value regulator, 0.002-0.008% of an activator, 0.1-0.3% of a crosslinking agent, 0.04-0.1% of a gel breaker, and the balance being water. The using effect of the fracturing fluid can be improved to a great extent, and the fracturing fluid can completely break gel and flow back at a low temperature of 15 DEG C-35 DEG C.

Description

Technical field: [0001] The invention relates to the technical field of oil field fracturing, and relates to an ultra-low temperature water-based guar gum fracturing fluid system, and is especially suitable for fracturing reconstruction of crude oil reservoirs at 15°C to 35°C. Background technique [0002] During the exploration of Karamay Oilfield, many shallow oil and gas reservoirs were discovered, such as the Jiamuhe Formation oil reservoir in Wuerhe, the Carboniferous reservoir in the north fault block of Baikouquan Gu16 well area, and the Karamay Formation oil reservoir in the Karamay-Middle Area, etc. The average porosity of the reservoir is 7%~25%, and the permeability is 0110×1023~3163×1023Lm 2 ; The burial depth of oil and gas reservoirs is 450-1500m, and the formation temperature is 15-35℃. As mining continues, the energy of the reservoir decreases and the output decreases. In order to increase production, the reservoir must be fractured. In order to obtain a g...

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
IPC IPC(8): C09K8/68
CPCC09K8/685C09K8/602C09K8/604C09K8/605C09K8/665C09K8/885C09K8/887C09K8/90C09K2208/12C09K2208/26
Inventor 李彦林刘炜王瑛孔丽娜汪志臣任家萍
Owner PETROCHINA CO LTD
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
Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com