Correction method for microseism interpretation fracturing fracture parameter result
A correction method and micro-seismic technology, applied in the fields of seismology, earth-moving drilling, geophysical measurement, etc., can solve the distortion of fracture parameters in micro-seismic interpretation, the lack of corresponding relationship between sand and fluid volume, and the lack of reference for fracture parameters. Value and other issues to achieve the effect of guiding construction operations
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[0132] The sand addition amount and microseismic interpretation fracture length of 36 fracturing wells in the Qieliu block were counted to obtain a two-dimensional random variable observation matrix composed of sand addition amount and fracture length, and then the observation matrix was calculated to obtain the mean vector for:
[0133] Calculated according to the formula, the A matrix of the six-block two-dimensional random variable sample is:
[0134]
[0135] According to the relevant knowledge of mathematical statistics, the unbiased estimation of the sample is used to replace the population covariance.
[0136]
[0137] From the covariance matrix of the sample, it can be found that the values differ greatly. In order to prevent the phenomenon of large numbers eating small numbers, when solving the principal components of the six blocks, it can be solved based on the correlation coefficient matrix. According to the above sample covariance matrix, The correlatio...
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