Measurement while drilling device

A measurement-while-drilling and drilling technology, applied in the field of geological exploration, can solve problems such as cumbersome operation process, and achieve the effect of reducing operation difficulty, shortening the length of logging instruments, and improving consistency

Pending Publication Date: 2020-05-08
中石化石油工程技术服务有限公司 +3
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Problems solved by technology

[0005] Aiming at the problem of cumbersome operation in the installation and measurement process of medium density logging tool and c

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Embodiment Construction

[0033] The implementation of the present invention will be described in detail below in conjunction with the accompanying drawings and examples, so that implementers of the present invention can fully understand how the present invention uses technical means to solve technical problems, and achieve the realization process of technical effects and according to the above-mentioned realization process The present invention is implemented concretely. It should be noted that, as long as there is no conflict, each embodiment and each feature in each embodiment of the present invention can be combined with each other, and the formed technical solutions are all within the protection scope of the present invention.

[0034] Aiming at the problem in the prior art that the density logging tool and the compensated neutron logging tool need to be rotated and measured separately, the present invention proposes a measurement-while-drilling device. In the measurement-while-drilling device of ...

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Abstract

The invention discloses a measurement while drilling device. The device comprises a protection sleeve, a neutron circuit framework, a density circuit framework, a while-drilling compensation neutron measurement assembly and a while-drilling direction and density imaging assembly. The protection sleeve is formed by machining an independent drill collar and seals and protects inner structures and devices of the protection sleeve. The neutron circuit framework is mounted on the upper portion in the protection sleeve. The density circuit framework is mounted on the lower portion in the protectionsleeve and is in butt joint with the neutron circuit framework. The while-drilling compensation neutron measurement assembly is mounted on the neutron circuit framework. The while-drilling direction and density imaging assembly is mounted on the density circuit framework. According to the device, a density logger and a compensated neutron logger are integrated in the same drill collar, and therefore the operation difficulty of mounting the density logger and the compensated neutron logger and carrying out testing is greatly reduced. Compared with the prior art, according to the device, the length of a logger can be effectively reduced, and consistency of compensated neutron measurement and while-drilling density measurement can be improved.

Description

technical field [0001] The invention relates to the field of geological exploration, in particular to a measurement-while-drilling device. Background technique [0002] In the field of geological exploration, density logging and neutron logging while drilling play an important role in the field of logging while drilling, and play an important role in timely identifying formation lithology, calculating porosity, permeability, oil saturation, and oil and gas shows. It is a necessary parameter for the fine evaluation of the formation while drilling, and it is also one of the key technologies for identifying gas layers. [0003] In order to accurately conduct geosteering, the density while drilling usually needs to measure the azimuth formation density imaging and pick up the dip angle of the formation, so that the wellbore trajectory can be precisely adjusted according to the change of the formation structure, and the penetration rate of the oil layer can be improved. Therefore...

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Application Information

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IPC IPC(8): E21B49/00E21B47/01E21B47/085
CPCE21B47/01E21B49/00
Inventor 李翠崔海波刘文庭张坚锋李勇华唐海全林楠杜海洋鲁超马海施斌全
Owner 中石化石油工程技术服务有限公司
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