Flexible inclination measuring system and measuring method for ultra-short radius well
An ultra-short-radius, well-flexible technology, applied in the field of oilfield exploration, which can solve the problems of inability to use ultra-short-radius wellbore trajectory, small wellbore curvature radius, difficult well deviation measurement, etc.
Active Publication Date: 2021-05-18
RES INST OF PETROLEUM ENG SHENGLI OIL FIELD SINOPEC
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Problems solved by technology
[0006] At present, the technology for ultra-short semi-wells is relatively perfect, and many ultra-short radius wells (less than 5m) have been developed. However, due to the small radius of curvature of the borehole (≥2.7m), the inventors found that conventional inclinometers cannot It meets the requirements of borehole curvature, but it is difficult to measure well deviation and cannot be used for the evaluation of borehole trajectory of ultra-short radius wells
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[0044] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.
[0045] It should be noted that the following detailed description is exemplary and intended to provide further explanation of the present invention. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
[0046] It should be noted that the terminology used here is only for describing specific embodiments, and is not intended to limit exemplary embodiments according to the present invention. As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural, and it should also be understood that when the terms "comprising" and / or "comprising" are used in this specification, they mean There are features, steps, operations, means, components and / or combinations thereof.
[0047] In...
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The invention belongs to the field of oil field detection, and provides a flexible inclination measuring system and measuring method for an ultra-short radius well. The flexible inclination measuring system for the ultra-short radius well comprises an inclination measuring module, a calibration device and a processor, wherein the inclination measuring module is connected with a flexible short section in a drilling tool, the inclination measuring module coincides with the axis of the flexible short section, and the inclination measuring module is used for measuring and storing well inclination data and time data of the ultra-short radius well in real time during downhole operation; the calibration device is used for calibrating the measurement error of the inclination measuring module; and the processor pre-stores the time and well depth data and is further used for acquiring the calibrated well inclination and time data, establishing the relationship between the well depth and the well inclination according to the time consistency and determining the well inclination of different well depths. The flexible inclination measuring system and measuring method for the ultra-short radius well are suitable for measuring the well inclination corresponding to different well depths of the ultra-short radius well, and can further perform error calibration on the well inclination data of the ultra-short radius well, and the precision of well inclination measurement is improved.
Description
technical field [0001] The invention belongs to the field of oil field detection, in particular to a flexible measuring system and measuring method for ultra-short radius wells. Background technique [0002] The statements in this section merely provide background information related to the present invention and do not necessarily constitute prior art. [0003] With the continuous development of oil fields and frequent operations in old oil areas, the well conditions of oil and water wells are deteriorating day by day, and the heterogeneity of oil reservoirs seriously affects the improvement of oil recovery. If renewal wells and infill wells are drilled in oil and gas development zones, the well construction period will be long and the cost will be high. Drilling ultra-short-radius horizontal wells inside the casing can not only save drilling costs, but also increase the exposed area of oil layers, improve recovery and economic benefits. [0004] The ultra-short radius h...
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IPC IPC(8): E21B47/022E21B47/26
CPCE21B47/022
Inventor 张锐戴荣东武加锋田启忠于少卿王锴刘希峰程彦新陈丽媛张子桢黄琪严文剑宋浩洋
Owner RES INST OF PETROLEUM ENG SHENGLI OIL FIELD SINOPEC