Guar gum fracturing fluid for ultrahigh-temperature reservoirs and method for preparing guar gum fracturing fluid

A guar gum fracturing fluid and ultra-high temperature technology are applied in the directions of chemical instruments and methods, drilling compositions, etc., which can solve the problem that the guar gum fracturing fluid cannot be used for fracturing and stimulation construction, so as to improve the effect of fracturing and reconstruction. , The effect of low surface interfacial tension and small residue content

Inactive Publication Date: 2018-11-13
PETRO KING ENERGY TECH HUIZHOU CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a guar gum fracturing fluid for ultra-high temperature reservoirs and a preparation method thereof, so as to solve the problem that the guar gum fracturing fluid in the prior art cannot be used for fracturing stimulation construction at a reservoir temperature above 140°C The problem

Method used

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  • Guar gum fracturing fluid for ultrahigh-temperature reservoirs and method for preparing guar gum fracturing fluid
  • Guar gum fracturing fluid for ultrahigh-temperature reservoirs and method for preparing guar gum fracturing fluid
  • Guar gum fracturing fluid for ultrahigh-temperature reservoirs and method for preparing guar gum fracturing fluid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Every 100ml of guar gum fracturing fluid used for ultra-high temperature reservoirs contains the following components: 0.55g of modified guar gum thickener, 2g of potassium chloride, 0.2ml of fungicide, 0.5ml of clay stabilizer, 0.3ml of foaming agent, 0.5ml of drainage aid, 0.1ml of sodium hydroxide solution (concentration 0.1g / ml), 0.35ml of crosslinking agent and 0.3g of gel breaker, and the balance is water. Wherein, the volume ratio of trioctyl borate and tetraisopropylacetonate zirconate in the crosslinking agent is 100:4.

[0042] Project case:

[0043] Well Travi-08 in the Punda de mada block, Venezuela, is a directional well, a development well, the construction well section is 6040.4m~6055.3m, the reservoir temperature is 175.2℃, and the above-mentioned modified guar gum thickener is used as an additive at a concentration of 0.55%. Construction fluid 670.4m 3 , construction displacement 5.0-6.2m 3 / min, the construction pressure is 70.5MPa~75.6MPa, and the ...

Embodiment 2

[0045] Every 100ml of guar gum fracturing fluid used for ultra-high temperature reservoirs contains the following components: 0.4g of modified guar gum thickener, 1g of potassium chloride, 0.1ml of fungicide, 0.3ml of clay stabilizer, 0.1ml of foaming agent, 0.3ml of drainage aid, 0.05ml of sodium hydroxide solution (concentration 0.25g / ml), 0.15ml of crosslinking agent and 0.1g of gel breaker, and the balance is water. Wherein, the volume ratio of trioctyl borate and tetraisopropylacetonate zirconate in the crosslinking agent is 100:2.

[0046] Project case:

[0047] RPN-59 in Anago Block, Venezuela, vertical well, development gas well, construction well section 4056.7-4068.7m, reservoir temperature 153.3℃, ​​using the additive of the above-mentioned modified guar gum thickener, using concentration 0.4%, construction fluid 508.7m 3 , construction displacement 4.7-5.5m 3 / min, construction pressure 68.5MPa~77.6MPa, daily gas production after pressure 217031m 3 / d, the produ...

Embodiment 3

[0049] Every 100ml of guar gum fracturing fluid used for ultra-high temperature reservoirs contains the following components: 0.8g of modified guar gum thickener, 4g of potassium chloride, 0.4ml of fungicide, 0.8ml of clay stabilizer, 0.5ml of foaming agent, 0.8ml of drainage aid, 0.2ml of sodium hydroxide solution (concentration 0.05g / ml), 0.5ml of crosslinking agent and 0.5g of gel breaker, and the balance is water. Wherein, the volume ratio of trioctyl borate and tetraisopropylacetonate zirconate in the crosslinking agent is 100:5.

[0050] Project case:

[0051] RPN-59 in the Anago block of Venezuela, vertical well, development gas well, construction well section 4125.1-4376.7m, reservoir temperature 157.5℃, using the additive of the above-mentioned modified guar gum thickener, the use concentration is 0.7%, and the construction fluid is 556.7m 3 , construction displacement 4.8-5.4m 3 / min, construction pressure 71.2MPa~80.4MPa, daily gas production after pressure 203211...

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Abstract

The invention relates to guar gum fracturing fluid for ultrahigh-temperature reservoirs and a method for preparing the guar gum fracturing fluid. The guar gum fracturing fluid and the method have theadvantages that the seam generating and sand carrying performance of the guar gum fracturing fluid can be guaranteed under the condition that the temperatures of the reservoirs are higher than 140 DEGC, the guar gum fracturing fluid is particularly suitable for fracturing and production increase of high-temperature and ultrahigh-temperature sandstone and carbonate reservoirs and is low in surfaceinterfacial tension, residue content and friction drag, good in stratum viscose mineral stability and high in flow back speed, damage on the reservoirs due to fluid can be effectively reduced, fracturing transformation effects for the high-temperature and ultrahigh-temperature reservoirs and effects of production increase transformation measures can be improved, and the oil and gas recovery ratios of the high-temperature reservoirs can be increased.

Description

technical field [0001] The invention relates to the technical field of petroleum exploitation, in particular to a guar gum fracturing fluid used in ultra-high temperature reservoirs and a preparation method thereof. Background technique [0002] With the development of the economy, Chinese people's dependence on and demand for oil and gas is increasing. In order to meet the balance of supply and demand of oil and gas resources, more unconventional oil and gas reserves are being gradually developed and utilized. For high-temperature oil and gas reservoirs and ultra-high oil and gas reservoirs, the existing guar gum system fracturing fluids have passed the professional evaluation of petroleum industry standards, and it is difficult to break through fracturing and stimulation operations at a reservoir temperature of 140°C. The specific manifestations are: when the cracking fluid system is at 140°C, after shearing for 10-25 minutes, the viscosity of the system is lower than 50mp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/68C09K8/90C08B37/00
CPCC08B37/006C09K8/685C09K8/905C09K2208/12C09K2208/26
Inventor 赵锦栋丁建锁林景禹贾新刚
Owner PETRO KING ENERGY TECH HUIZHOU CO LTD
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