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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

Active Publication Date: 2019-10-25
CHINA UNIV OF PETROLEUM (BEIJING)
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Problems solved by technology

[0004] At present, most of the research focuses on improving the theoretical algorithm of microseismic reconstruction. In the process of microseismic monitoring, due to the influence of noise, the parameters of microseismic interpretation fractures are distorted. There is no corresponding relationship, so the fracture parameters derived from microseismic inversion have no reference value, which seriously affects the evaluation of fracture shape and fracturing effect after fracturing

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  • Correction method for microseism interpretation fracturing fracture parameter result
  • Correction method for microseism interpretation fracturing fracture parameter result
  • Correction method for microseism interpretation fracturing fracture parameter result

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Embodiment

[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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Abstract

The invention relates to a correction method for a microseism interpretation fracturing fracture parameter result. The method comprises the steps that A, communication modes of sampling fracturing wells in a block to be corrected are classified according to the matching degree of a microseism monitoring result and the sand adding amount; B, volume coefficient correction is conducted on the classified fractured well single wells, and the volume correction coefficient BV of each fractured well is shown as follows: [L5 / 4H] W is a calculated value of a microseism monitoring interpretation result;wherein [L5 / 4H] T is a theoretical calculation value obtained by using field construction parameters; and C, according to the calculated single well volume correction coefficient of each fractured well, a class volume correction coefficient of each fractured well is calculated. According to the method, the microseism interpretation result can be corrected in combination with the on-site construction parameters, so that the microseism monitoring data can be utilized to truly interpret the effective fracture form after fracturing, the accurate inversion of the microseism position can be assisted, and the hydraulic fracturing construction operation can be effectively guided.

Description

technical field [0001] The invention relates to the technical field of microseismic monitoring and interpretation, in particular to a correction method for microseismic interpretation of fracturing fracture parameter results. Background technique [0002] With the continuous development of mineral mining technology, the behavior of hydraulic fractures meeting natural fractures has attracted more and more attention. Hydraulic fracturing is recognized as the main stimulation technique for enhancing oil recovery in tight fractured reservoirs. The hydraulic fractures produced by hydraulic fracturing can activate natural fractures and form a complex diffuse fracture network, which can increase permeability and increase production. Therefore, the research on the intersection mode and effect of hydraulic fractures and natural fractures has extremely high application value . [0003] Microseismic monitoring is one of the effective methods to interpret the length, height and orient...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50G06K9/62E21B43/26
CPCE21B43/26G06F30/20G06F18/24E21B49/00G01V2210/646G01V1/288G06F18/2135E21B2200/20E21B43/267G01V1/301G06F18/2431
Inventor 侯冰肖月金衍曹博文陈勉
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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