Fracture liquid and preparation method thereof

A fracturing fluid and base fluid technology, applied in chemical instruments and methods, drilling compositions, etc., can solve the problems of river water pollution, cost increase, water resource shortage, etc.

Inactive Publication Date: 2009-03-11
YANCHANG OIL FIELD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Oil wells generally produce liquid with an average water content of 70% and oil content of 30%. In these places, the oil production of oil wells is cracked through river water distribution, and the oil production is low. Using river water as raw materials makes the originally scarce water resources more tense and causes damage to the river water. A large amount of pollution has deteriorated the environment, and a large amount of anti-swelling agent and demulsifier are used in the preparation of river water, which increases the cost of oil recovery

Method used

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  • Fracture liquid and preparation method thereof
  • Fracture liquid and preparation method thereof
  • Fracture liquid and preparation method thereof

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preparation example Construction

[0024] 2. Preparation method of fracturing fluid:

[0025] When preparing the fracturing fluid of the present invention, the base fluid and the crosslinking fluid should be prepared separately.

[0026] 1. Preparation of base liquid:

[0027] According to the calculated amount, the sewage from the crude oil layer is added to the dosing tank. First, 0.3% to 0.5% of hydroxypropyl guar gum HPG-1 is added to the dosing tank, and then 0.4% to 0.5% is added to the dosing tank. % of fracturing fluid temperature stabilizer T-1, continue to add 0.05% to 0.15% of fracturing fluid low-temperature initiator in the liquid mixing pool, and finally add 0.2% to 0.3% of drainage aid in the liquid mixing pool, and then Stir the dosing pool for 100 to 120 minutes to complete the configuration of the required base liquid.

[0028] 2. Preparation of cross-linking solution:

[0029] Add clean water to the dosing tank according to the calculated amount, first add 0.5% to 1.5% ammonium persulfate ...

Embodiment 1

[0044] Get 0.3% hydroxypropyl guar gum HPG-1, 0.4% fracturing fluid temperature stabilizer T-1, 0.05% fracturing fluid low-temperature initiator, 0.2% drainage aid and remaining The amount of sewage from the crude oil layer is added to the dosing tank, first add 0.3% hydroxypropyl guar gum HPG-1 to the dosing tank, and then add 0.4% to the dosing tank fracturing fluid temperature stabilizer T-1, continue to add 0.05% fracturing fluid low-temperature initiator in the liquid mixing tank, and finally add 0.2% drainage aid in the liquid mixing tank, and then stir the mixing tank for 100 minutes, That is, the configuration of the base liquid is completed;

[0045] Take 0.5% ammonium persulfate, 0.5% borax and the clear water of the balance respectively according to the total amount of 100%, add the clear water in the liquid mixing tank, first add 0.5% ammonium persulfate in the liquid mixing tank, and then add Add 0.5% borax to the dosing tank, and finally stir the dosing tank for...

Embodiment 2

[0048] Get 0.5% hydroxypropyl guar gum HPG-1, 0.5% fracturing fluid temperature stabilizer T-1, 0.15% fracturing fluid low-temperature initiator, 0.3% drainage aid and remaining Measure the sewage from the crude oil layer, add the sewage from the source and the crude oil layer to the dosing tank, first add 0.5% hydroxypropyl guar gum HPG-1 to the dosing tank, and then add 0.5% to the dosing tank fracturing fluid temperature stabilizer T-1, continue to add 0.15% fracturing fluid low-temperature initiator in the liquid mixing tank, and finally add 0.3% drainage aid in the liquid mixing tank, and then stir the mixing tank for 120 minutes, That is, the configuration of the base liquid is completed;

[0049] Take 1.5% ammonium persulfate, 1.5% borax and the clear water of the balance respectively according to the total amount of 100%, add the clear water in the liquid mixing tank, first add 1.5% ammonium persulfate in the liquid mixing tank, and then Add 1.5% borax to the dosing t...

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Abstract

The invention discloses fracturing fluid and a preparation method thereof. The fracturing fluid is formed by mixing base fluid and crosslinked fluid according to the crosslinking ratio of 100 to 5; the base fluid consists of the following compositions according to mass percentage: 03 to 0.5 percent of hydroxypropyl guanidine gum HPG-1, 0.4 to 0.5 percent of a temperature stabilizer for the fracturing fluid, 0.05 to 0.15 percent of a low temperature evocating agent for the fracturing fluid, 0.2 to 0.3 percent of a cleanup additive and the balance being sewage water from a crude oil layer; and the crosslinked fluid consists of the following compositions according to mass percentage: 0.5 to 1.5 percent of borax, 0.5 to 1.5 percent of ammonium persulfate and the balance being clear water. The method for preparing the fracturing fluid comprises the following steps: the prepared base fluid and the prepared fracturing fluid are respectively placed for 100 to 120 minutes and are mixed according to the crosslinking rate of 100 to 5 to form the fracturing fluid. The method adopts the sewage water for matching the fracturing fluid, saves cost, has small pollution to the environment and improves the wave and volume of a water-driven reservoir and the oil-sweeping efficiency.

Description

technical field [0001] The invention belongs to the technical field of oil and gas field development, and in particular relates to a fracturing fluid, and also relates to a preparation method of the fracturing fluid. Background technique [0002] In some areas of my country, oilfields have low reserve abundance, low permeability, low production, high water cut, and surface water resources are scarce, so oil wells have no natural production capacity. Oil wells generally produce liquid with an average water content of 70% and oil content of 30%. In these places, the oil production of oil wells is cracked through river water distribution, and the oil production is low. Using river water as raw materials makes the originally scarce water resources more tense and causes damage to the river water. A large amount of pollution deteriorates the environment, and a large amount of anti-swelling agent and demulsifier are used in the preparation of river water, which increases the cost o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/68
Inventor 王浩清罗燃昊张建国马李军王振生
Owner YANCHANG OIL FIELD
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