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Nano-material associated clean fracturing fluid system and application thereof in oil and gas fields

A clean fracturing fluid and nano-material technology, applied in nano-material association clean fracturing fluid system and its application in oil and gas fields, to achieve broad market prospects and improved temperature resistance

Active Publication Date: 2013-11-13
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the improvement of the temperature resistance of the nano-material association clean fracturing fluid system needs further research and development and improvement.

Method used

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  • Nano-material associated clean fracturing fluid system and application thereof in oil and gas fields
  • Nano-material associated clean fracturing fluid system and application thereof in oil and gas fields
  • Nano-material associated clean fracturing fluid system and application thereof in oil and gas fields

Examples

Experimental program
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Effect test

Embodiment 1

[0027] Nano MgC 2 o 4 The preparation method: magnesium chloride hexahydrate with a molar ratio of 50:1:50, disodium oxalate tetraacetate (C 10 h 14 N 2 o 8 Na 2 2H 2 O) and sodium oxalate were dissolved in distilled water to make a solution, in which the concentration of magnesium chloride was 0.5mol / L, stirred for 1h, aged for 20h, dried at 80°C, and roasted at 500°C for 3h to obtain nano-MgC 2 o 4 powder, its particle size is 11.8nm, its XRD characterization spectrum is as follows figure 1 shown.

Embodiment 2

[0029] Nano-Al(OH) 3 Preparation method: prepare aluminum nitrate and ammonium bicarbonate solutions with mass fractions of 27% and 12%, respectively. Add a certain amount of CTAB into the aluminum nitrate solution, the ratio of aluminum nitrate and CTAB is 1:0.006, and stir to obtain a clear solution. Then the ammonium bicarbonate solution was slowly added dropwise to the vigorously stirred aluminum nitrate solution. After the dropwise addition, the stirring was continued for 1 h, aged for 48 h, and the wet gel was dried at 80°C to obtain nano-Al(OH) 3 powder, its particle size is 37.8nm, its XRD characterization spectrum is as follows figure 2 shown.

Embodiment 3

[0031] Nano γ-Al 2 o 3 Preparation method: the nano-Al(OH) prepared in Example 2 3 The powder was calcined at 500°C for 3h to obtain nanometer γ-Al 2 o 3 powder, its particle size is 18.7nm, its XRD characterization spectrum is as follows image 3 shown.

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Abstract

The invention provides a nano-material associated clean fracturing fluid system; the system comprises a nano-material, a clean fracturing fluid and a dispersing auxiliary liquid trihydric alcohol. The nano-material associated clean fracturing fluid system can be applied to oil and gas fields with the temperature as high as 130 DEG C above, and can still maintain a certain viscosity at the temperature. The obviously improved temperature tolerance of the prepared nano-material associated clean fracturing fluid system is beneficial to the application of the system in high temperature deep-well oil fields. Through use of the system, nanotechnology and petroleum industry are closely combined, and the market prospect is broad.

Description

technical field [0001] The invention relates to a nanometer material association clean fracturing fluid system and its application in oil and gas fields, especially the application in oil and gas field stimulation and transformation. Background technique [0002] Hydraulic fracturing technology has played an important role in the exploitation of oil and gas fields, and is the main technology for increasing single well production in low-permeability and ultra-low-permeability reservoirs. Clean fracturing fluid without residue has little damage to propped fractures and formations, and is the development trend and hot spot of fracturing fluid research at home and abroad. With the deepening of oil and gas exploration and development in deep and ultra-deep wells, the thermal shear viscosity of conventional fracturing fluid systems decreases too quickly at high temperatures, which cannot meet the requirements of fracturing reconstruction in ultra-deep wells. The key to the progre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/68
Inventor 黄静王宝峰王淑荣薛承瑾蒋廷学陈作张保平魏娟明
Owner CHINA PETROLEUM & CHEM CORP
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