Fracturing fluid solution capable of being prepared from high-mineralization water and application of fracturing fluid

A high salinity, fracturing fluid technology, applied in drilling compositions, chemical instruments and methods, etc., can solve the problem that the water source cannot be used for fracturing fluid preparation, achieves significant environmental protection and water saving benefits, and alleviates water loss. The effect of resource requirements

Inactive Publication Date: 2016-06-08
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to develop a new type of fracturing fluid system, which can adapt to more abundant sources of fracturing water, solve the problem that some water sources in water-scarce areas cannot be prepared for fracturing fluid, and alleviate the demand for water resources in hydraulic fracturing

Method used

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  • Fracturing fluid solution capable of being prepared from high-mineralization water and application of fracturing fluid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] This embodiment provides a solution that can use high-salinity water to prepare fracturing fluid. The composition of the solution is as follows in terms of weight percentage:

[0032] Anti-high salinity thickener 0.15-0.45%;

[0033] Temperature stabilizer 0.1% (the temperature stabilizer is one or more of NaOH solution, KOH solution, triethanolamine, phosphoric acid);

[0034] Drainage aid 0.2% (drainage aid is a non-ionic surfactant, and its specific formula is one of nonylphenol polyoxyethylene ether, lauryl alcohol, and cetyl alcohol with ethanol and water in a mass ratio of 1:0.5:3 compounded);

[0035] High salinity water 99.15-99.54% (such as oil field underground brackish water, fracturing flowback fluid, oil and gas well produced water, etc.);

[0036] Gel breaker 0.01-0.1% (gel breaker is one of ammonium persulfate, potassium persulfate, hydrogen peroxide, and magnesium hypochlorite wrapped in capsules).

[0037] The above-mentioned anti-high salinity thick...

Embodiment 2

[0045]This example provides a jelly fracturing fluid prepared from a solution of high salinity water to prepare a fracturing fluid as described in Example 1. The volume ratio of the solution and the cross-linking agent is 100:0.5 ~3.0 ratio to make jelly fracturing fluid.

[0046] The above-mentioned jelly fracturing fluid can be prepared by using high-salinity water to prepare a fracturing fluid solution, and the cross-linking agent is composite titanium triethoxide and NaHCO 3 Stir in the organic solvent tert-butanol according to the mass ratio of 1:1:50 to form the finished crosslinking agent.

[0047] 30m on site 3 Add 28m to the container 3 For high-salinity water, add thickener slowly while circulating the pump, and then add drainage aid in sequence according to the formula ratio (nonylphenol polyoxyethylene ether, ethanol, and water are compounded at a mass ratio of 1:0.5:3 obtained), stabilizer (triethanolamine), and continue to circulate for 10 minutes. Continue t...

Embodiment 3

[0053] This example provides a slick water fracturing fluid that can be prepared by using a solution of high salinity water to prepare a fracturing fluid as described in Example 1. The solution is mixed with clean water at a volume ratio of 1:2 to prepare into slippery water fracturing fluid.

[0054] 30m on site 3 Add 10m to the container 3 Clean water, slowly add the thickener under the condition of pump circulation, and then add the drainage aid nonylphenol polyoxyethylene ether, ethanol, and clean water according to the mass ratio of 1:0.5:3), stabilizer ( Triethanolamine), continue to circulate for 10 minutes, continue to circulate and replenish the liquid, and continue for 20 minutes to ensure that the liquid is fully mixed to form a slick water fracturing fluid, which can be used directly as a fracturing fluid for downhole fracture.

[0055] The slick water fracturing fluid formed is used for downhole fracturing. After testing, the total fluid volume of the entire co...

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Abstract

The invention belongs to the technical field of oilfield chemistry, and relates to a fracturing fluid solution capable of being high-mineralization water and a fracturing fluid prepared from the solution. Special hydrophobic groups are introduced into a high-molecular polymer structure. After a long-time low-temperature reaction, the synthesized polymer is improved in temperature resistance, salt tolerance, and bacterial corrosion resistance. A compatible additive matches the synthesized polymer to form a fracturing fluid system with excellent drag reduction performance and sand transportation ability. The fracturing fluid system can effectively satisfy fracturing construction requirements. The fracturing fluid can be prepared from high-mineralization water, such as oilfield underground brackish water, a fracturing flowback fluid, and oil and gas well produced water. The prepared fracturing liquid has temperature resistance and salt tolerance performance, low damage, and low frictional resistance, and can effectively satisfy fracturing construction requirements.

Description

technical field [0001] The invention belongs to the technical field of oilfield chemistry and relates to a fracturing fluid used for oil field stimulation, in particular to a solution capable of preparing a fracturing fluid with high-salinity water and an application thereof. Background technique [0002] Fracturing has been developed rapidly and widely used as the main production and injection measures of oil and gas reservoirs. Fracturing is the use of pressure to open formations to form fractures and support them with proppant to reduce fluid flow resistance and increase production and injection measures. [0003] The purpose of fracturing is to form fractures with conductivity in the formation. The fracturing fluid used determines the fracturing effect to a large extent. At the same time, there are certain requirements for the viscosity of the fracturing fluid so that it can Fluids known as low viscosity flow back easily to avoid damage to hydrocarbon layers in the form...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/68C09K8/88
CPCC09K8/685C09K8/882C09K2208/26
Inventor 吴江朱天寿慕立俊赵振峰李宪文张矿生唐梅荣李楷吕海燕刘锦范华波郭钢马兵樊凤玲
Owner PETROCHINA CO LTD
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