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Deep compact gas pool fracturing liquid

A technology of tight gas and fracturing fluid, applied in the field of fracturing fluid, can solve problems such as low construction success rate, opening of fracturing cracks, and research limitations of extension mechanism fracturing working fluids, etc.

Active Publication Date: 2005-05-11
PETROCHINA CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Fracturing is currently the most effective method for reservoir stimulation and transformation. In order to further tap natural gas reserves and improve the efficiency of natural gas development, in recent years, relevant technical research and tests have been actively carried out at home and abroad, but the success rate of construction is still low, except for the deep In addition to the complexity of gas reservoirs and the arduousness of geological understanding, there are still limitations in the research on the initiation and extension mechanism of fracturing fractures and the applicable fracturing working fluid.

Method used

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  • Deep compact gas pool fracturing liquid
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specific Embodiment approach 1

[0004] Specific embodiment one: The fracturing fluid of this embodiment is mixed by the following components by weight percentage: thickener 0.2~1.0%, surfactant 0.05~0.2%, clay stabilizer 0.1~1%, bactericide 0.01~ 0.2%, buffering agent 0.05-0.2%, temperature stabilizer 0.1-0.5%, high-temperature cross-linking agent 0.1-0.5%, cross-linking control agent 0.1-0.5%, gel breaker 0.001-0.01%, gel-breaking catalyst 0.0001-0.001 %, defoamer 0.01-0.15%, fluid loss reducer 1-5%, and the balance is water. The thickener is hydroxypropyl modified guar gum, guar gum, hydroxypropyl modified guar gum, carboxymethyl hydroxypropyl modified guar gum, coumarin, xanthan gum or carboxymethyl cellulose ; The surfactant is a fluorine-containing surfactant or an anionic surfactant; the clay stabilizer is a small molecular weight clay stabilizer or KCl; The buffer is an organic acid-base buffer; the temperature stabilizer is a complex of sodium thiosulfate and low molecular weight alcohol; the high-t...

specific Embodiment approach 2

[0005] Specific embodiment two: The fracturing fluid of this embodiment is mixed by the following components by weight percentage: thickener 0.3~0.5%, surfactant 0.06~0.1%, clay stabilizer 0.2~0.5%, bactericide 0.02~ 0.1%, buffering agent 0.06-0.12%, temperature stabilizer 0.15-0.3%, high-temperature cross-linking agent 0.15-0.25%, cross-linking control agent 0.2-0.3%, gel breaker 0.002-0.05%, gel-breaking catalyst 0.0002-0.0005 %, defoamer 0.02-0.05%, fluid loss reducer 1.5-3%, and the balance is water.

specific Embodiment approach 3

[0006] Specific embodiment three: The fracturing fluid of this embodiment is mixed by the following components by weight percentage: thickener 0.6~0.9%, surfactant 0.12~0.18%, clay stabilizer 0.6~0.9%, bactericide 0.12~ 0.18%, buffering agent 0.15~0.19%, temperature stabilizer 0.32~0.48%, high temperature crosslinking agent 0.35~0.45%, crosslinking control agent 0.35~0.4%, gel breaker 0.06~0.09%, gel breaking catalyst 0.0006~0.0009 %, defoamer 0.06-0.09%, fluid loss reducer 3.5-4.5%, and the balance is water.

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Abstract

A deep compaction gas-pool pressure-crack liquid is composed : thickener 0.2-1.0%, surfactant 0.05-0.2%, clay stabilizer 0.1-1%, germicide0.01-0.2%, buffering agent 0.05-0.2%, the temperature stabilizer 0.1-0.5%, the high temperature cross linker 0.1-0.5%, the cross linking control agent 0.1-0.5%, the broker gum agent 0.001-0.01%, the broken gum catalyst 0.0001-0.001%, the antifoam agent 0.01-0.1%, the falling filter-lossing agent 1-5%, water: the rest. The liquid is of thermal resistance and shearing performance and It can decrease the nowel of the pressure-crack liquid and the filting loss, also it can improve efficiency.

Description

Technical field: [0001] The invention relates to a fracturing fluid, in particular to a fracturing fluid applied in large-scale fracturing of deep tight gas reservoirs. Background technique: [0002] In recent years, with the rapid development of the world economy, the development and utilization of natural gas resources have received widespread attention. Due to its unique hydrocarbon generation and accumulation mechanism, natural gas resources mainly occur in deep tight formations worldwide. The reservoir has a long burial history, large burial depth, poor physical properties, and low natural production capacity. Only through fracturing and stimulation can the ideal commercial reserves and mining value be achieved. Fracturing fluid is the working fluid for fracturing construction, which is used to transfer energy during construction, open fractures in the reservoir, and transport proppant along the fractures, so as to form a channel with high conductivity in the reservoir ...

Claims

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Application Information

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Inventor 韩松张浩洪怡春张凤娟
Owner PETROCHINA CO LTD
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