After-drilling inversion method for while-drilling electromagnetic wave well-log data of high deviated well/horizontal well
A technology for highly deviated wells and well logging data, which is applied to wellbore/well components, earthwork drilling, electrical digital data processing, etc. Problems such as reduced accuracy of results can achieve the effect of ensuring global optimality and accuracy, improving inversion speed, and solving slow speed
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[0051] The present invention will be further described in detail below in conjunction with the drawings and specific implementations:
[0052] Combine figure 1 As shown, a post-drilling inversion method of electromagnetic wave logging data from highly deviated wells / horizontal wells while drilling includes the following steps:
[0053] s1. Extract the reservoir horizontal resistivity sequence from the adjacent well data as a geological constraint.
[0054] s2. Obtain logging data of highly deviated wells / horizontal wells, such as figure 2 As shown, according to data such as gamma-while-drilling or neutron density imaging, the position and dip angle information of the N-layer formation interface can be obtained, such as image 3 Shown.
[0055] s3. Perform layer-by-layer processing on the N layers divided in step s2.
[0056] Take the i-th layer as an example, establish a one-dimensional three-layer inversion model with i-layer as the target layer, such as Figure 4 As shown, T represe...
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