Method for evaluating shale stratum borehole wall stabilizing capacity of drilling fluid based on acoustoelectric response
A technology for drilling fluid and shale, which is applied in the field of indoor evaluation of drilling fluid, can solve the problem that the evaluation results are not accurate, reliable, objective, and truly reflect the ability of drilling fluid to stabilize the wellbore, and the performance evaluation of the stability of the wellbore in shale formations poor adaptability
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[0029] A method for evaluating the ability of drilling fluid to stabilize the borehole wall of shale formations based on acoustic-electric response, see figure 1 , the method contains:
[0030] (1) Core sample preparation
[0031] Sample drilling: drilling and coring the mud shale formation to be drilled, determining the core sample direction according to the drilling and coring direction, drilling a plunger core sample with a diameter of 1in (inch) and a length approximately twice the diameter, and a total of 5 indivual;
[0032] Sample treatment: Grind the end of the sample so that the two ends of the plunger are parallel and perpendicular to the axis, place the plunger sample in a constant temperature box, and dry it at 60°C for more than 24 hours;
[0033] Sample selection: For the drilled plunger core samples, describe the apparent structure of the samples, and select 3 core plungers with complete appearance and no obvious cracks as experimental samples, numbered C1, C2...
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