Logging data quality recovery method and device
A technology for logging data and quality, applied in earth-moving drilling, wellbore/well components, construction, etc., can solve problems such as cost increase, influence on calibration quality, and increased risk of instrument jamming, and achieve the effect of avoiding cost increase
Active Publication Date: 2017-06-13
BC P INC CHINA NAT PETROLEUM CORP +1
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Problems solved by technology
[0006] First, the measurement of the acceleration curve of the instrument needs to add a special acceleration measuring instrument, which increases the total length of the instrument, increases the risk of the instrument being stuck, and also increases the cost; second, the operation of the acceleration measuring instrument is cumbersome, which affects the calibration quality
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[0030] In order to make the object, technical solution and advantages of the present invention clearer, the implementation manner of the present invention will be further described in detail below in conjunction with the accompanying drawings.
[0031] figure 1 It is a flow chart of the logging data quality restoration method provided by the embodiment of the present invention. see figure 1 , the example includes:
[0032] 101. Obtain the logging curve measured by the logging instrument and the tension curve of the rope pulling the logging instrument;
[0033] The tension curve is used to record the relationship between the tension data of the rope pulling the instrument and the well depth during the measurement process. In the prior art, the tension curve is mainly used for artificial monitoring of instrument abnormalities, but not as a basis for recovery of logging data.
[0034] Such as figure 2 As shown, the acceleration curve, tension curve and logging curve have con...
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The invention discloses a logging data quality recovery method and device, and belongs to the technical field of logging. The method comprises the steps that a logging curve measured by a logging instrument and a tension curve pulling a rope of the logging instrument are obtained; according to the tension data of adjacent sampling points on the tension curve of the rope, the abnormal depth segment and the abnormal tension data change amplitude of the tension curve are obtained when the tension curve is abnormal; according to the abnormal depth segment and the abnormal tension data change amplitude, real depths corresponding to all the sampling points in the abnormal depth segment are obtained when the tension curve is abnormal; logging data corresponding to the real depths corresponding to the sampling points on the logging curve are recovered. The common and frequently-used tension curve is adopted as the data recovery basis in the logging operation, logging data recovery can be achieved without measuring additional data, the method is simple and easy to implement, meanwhile, no additional equipment needs to be added, and cost is prevented from being increased.
Description
technical field [0001] The invention relates to the technical field of well logging, in particular to a method and device for restoring the quality of well logging data. Background technique [0002] Well logging data are the physical parameters of the formation obtained by measuring the electrical, acoustic, radioactive and other physical responses of the formation when the logging instrument penetrates the formation, and are mainly used to judge the oil and gas characteristics of the formation. Usually, the logging instrument needs to be in a state of uniform motion when measuring the logging data to ensure that the error of the entire measurement system is stable. [0003] The well logging curve is used to record the correspondence between the well depth during the measurement process and the well logging data obtained from the measurement. At present, in the field of well logging, as the drilling is getting deeper and deeper, the difficulty of wellbore control is increa...
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IPC IPC(8): E21B49/00E21B47/26
CPCE21B47/26E21B49/00
Inventor 汤天知余春昊周军倪路桥刘伟
Owner BC P INC CHINA NAT PETROLEUM CORP