Hard and brittle mud shale fracturing pressure predicting method
A prediction method and fracture pressure technology, which is applied in the direction of earthwork drilling, production fluid, wellbore/well components, etc., to achieve the effect of simple calculation
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[0036] The present invention will be described in detail below in conjunction with embodiments.
[0037] Reference figure 1 , A hard and brittle shale fracture pressure prediction method, including the following steps:
[0038] 1) Obtain the rock parameters of hard and brittle shale through indoor hydration triaxial experiment, including rock compressive strength, elastic modulus and Poisson's ratio;
[0039] Testing the compressive strength, elastic modulus, and Poisson's ratio of the rock includes the following steps:
[0040] 1.1) Preparation of standard cylindrical rock samples: Prepare according to the recommended standards of the International Society for Rock Mechanics (ISRM), and process the removed shale core into a cylindrical standard sample with a diameter of 25.4mm and a height of 50mm. The flatness of the end surface Is 0.1mm;
[0041] 1.2) Immerse the standard cylindrical rock samples prepared in step 1.1) of the 3 groups in distilled water for 1d, 3d and 5d respectivel...
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