Fracturing fluid and fracturing method for increasing applicaiton efficiency of support agent in fractured cracks
A fracturing fluid and proppant technology, applied in chemical instruments and methods, earthwork drilling, drilling composition, etc., can solve the problems of poor suspended sand performance, poor fracturing effect, weakened fiber strength, etc. To achieve the effect of improving the conductivity, reducing the sedimentation rate, and evenly distributing
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[0061] Example 1: Effect experiment of suspended sand fiber at room temperature
[0062] At room temperature, add 2000ml tap water in sequence, add 8g hydroxypropyl guar gum (Jingkun Oilfield Chemical Technology Development Company) and 0.5g citric acid (commercially available product) under stirring conditions, stir to dissolve completely, and place 4 hours. Use sodium hydroxide solution to adjust the pH value to about 10-11, measure 600ml of glue and divide into three parts, add 2.25g fiber FBR-8 (curved shape, maximum length 10mm, diameter 15μm, average tensile strength 2400MPa; Beijing Kemax Oilfield Chemical Technology Co., Ltd.), stir to make it evenly dispersed; one part is not added with fiber, and the other part is added with commonly used linear fiber (used as a control). Then add 2.5ml of organoboron crosslinking agent YP-150 (Beijing Komax Oilfield Chemical Technology Co., Ltd.) into the three solutions to make it crosslink; finally add 240g CARBOPROP medium strength...
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[0068] Example 2: Fracturing stimulation of the present invention
[0069] In November 2010, the well A was subjected to fiber suspended sand fracturing. The fracturing method and the composition of the fracturing fluid are as follows.
[0070] The fracturing method can be summarized as: with 4.0m 3 Displacement per minute injects prefluid 180m 3 Make seams, and then take 3.5~4.0m 3 Displacement per minute injects 150m of fiber sand-carrying liquid 3 , The fiber concentration is 0.3% by weight, the fiber length is 8mm, and the fiber diameter is 15μm. Add ceramsite (40-60 mesh medium strength ceramsite) 32.1m 3 , The results show that a better fracturing stimulation effect is obtained. The specific implementation steps are as follows (wherein, unless specified, the sources of the reagents and other substances used in this embodiment are the same as in embodiment 1):
[0071] (1) Use prefluid 180m 3 To 4.0m 3 Displacement per minute is injected into the formation to create a joint;
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