63 gamma-ray spectrum three-probe logging instrument and logging method thereof
A technology of gamma energy spectroscopy and three probes, which is applied in the directions of borehole/well components, measurement, earthwork drilling and production, etc., can solve the problems of low detection efficiency and achieve the effect of making up for the low detection efficiency
Active Publication Date: 2020-05-08
北京环鼎科技有限责任公司 +1
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[0006] For this reason, the embodiment of the present invention provides a 63 gamma energy spectrum three-probe logging tool and its logging method. By using three sets of gamma ray detectors and three sets of processing circuits for logging, the measurement results can be superimposed , using this method to make up for the shortcoming of low detection efficiency of small diameter detectors, to solve the problems existing in the prior art
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[0039] The implementation mode of the present invention is illustrated by specific specific examples below, and those who are familiar with this technology can easily understand other advantages and effects of the present invention from the contents disclosed in this description. Obviously, the described embodiments are a part of the present invention. , but not all examples. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0040] Refer to the attached Figure 4-5 , a 63-gamma spectrum three-probe logging tool in this embodiment, including a pressure-bearing shell 1, a core 2 installed in the pressure-bearing shell 1, and three groups of gamma rays installed in the core 2 The detector 3 and three groups of processing circuits, each group of processing circuits includes a high-voltage circuit 4, a signal processing ...
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The invention discloses a 63 gamma-ray spectrum three-probe logging instrument and a logging method thereof, and particularly relates to the field of logging equipment. The 63 gamma-ray spectrum three-probe logging instrument comprises a pressure-bearing shell body, a core body which is installed in the pressure-bearing shell body, and three groups of gamma-ray detectors and three groups of processing circuits which are installed in the core body, each processing circuit comprises a high-voltage circuit, a signal processing circuit, a data storage circuit, a communication circuit and a switching power supply circuit; the output end of each gamma-ray detector is connected with the input end of the signal processing circuit and is used for acquiring and converting information; and the communication circuit comprises a CAN communication board, a COM communication board, an Ethernet interface and a telemetry short section. According to the 63 gamma-ray spectrum three-probe logging instrument and the logging method thereof, the three groups of gamma-ray detectors and the three groups of processing circuits are adopted so that logging can be carried out, superposing measurement results can be carried out, and the defect that a small-diameter detector is low in detection efficiency can be overcome through the method.
Description
technical field [0001] The embodiment of the present invention relates to the field of logging equipment, in particular to a 63 gamma spectrum three-probe logging tool and a logging method thereof. Background technique [0002] The natural gamma ray spectrum logging tool can measure the total gamma count rate and the three natural radioactive elements contents of thorium, uranium and potassium in the formation. The contents of thorium (Th), uranium (U) and potassium (K) account for more than 99% of the total amount of radioactive elements in the formation, and other natural radioactive elements account for less than 1%, which can be completely ignored. According to the geophysical properties of thorium, uranium, and potassium, combined with natural gamma ray spectrum logging data and other relevant data, the existence rules of these three elements can be traced to identify igneous rocks, distinguish lithofacies, determine clay content, and help to classify reservoirs. set l...
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IPC IPC(8): E21B47/00E21B47/13E21B47/26
CPCE21B47/00
Inventor 马刊创张再峰李卫强孙文龙李英波刘金柱高秦群马阔
Owner 北京环鼎科技有限责任公司