Device and method for while-drilling detection of formation interface through azimuthal resistivity

A technology of formation interface and resistivity, which is applied in earthwork drilling, wellbore/well components, buildings, etc., can solve problems such as difficult to determine distance, difficult direction, unable to meet accurate geological steering and formation evaluation, and reduce interference , strong directionality, simple installation effect

Active Publication Date: 2016-11-09
上海神开石油测控技术有限公司 +3
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Problems solved by technology

More importantly, conventional electromagnetic wave resistivity is difficult to determine the distance from the highly deviated or horizontal wellbore to the boundary of the upper and lower surrounding rocks, especially it is difficult to determine the direction
The limitations of conventional electromagnetic wave resistivity instruments show that they cannot meet the needs of precise geosteering and formation evaluation

Method used

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  • Device and method for while-drilling detection of formation interface through azimuthal resistivity
  • Device and method for while-drilling detection of formation interface through azimuthal resistivity
  • Device and method for while-drilling detection of formation interface through azimuthal resistivity

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Embodiment Construction

[0033] The present invention will be further elaborated below by describing a preferred specific embodiment in detail in conjunction with the accompanying drawings.

[0034] Such as figure 1 Shown, a kind of device that utilizes azimuth resistivity while drilling to detect formation interface, comprises: non-magnetic drill collar 1, it is used as the carrier of whole device, is provided with a compensation resistivity measuring point 11; Circuit unit 2, it is installed in non-magnetic Inside the drill collar 1; several antennas and the antenna tuning unit 4 corresponding to each antenna are respectively arranged on the outer surface of the non-magnetic drill collar 1, and connected to the circuit unit 2. The function of the circuit unit 2 is to control the antenna Transmitting and receiving, analysis and calculation, the function of the antenna tuning unit 4 is to compensate according to the electrical characteristics of each antenna, so that the performance of the antenna me...

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Abstract

The invention discloses a device and method for while-drilling detection of a formation interface through azimuthal resistivity. The device comprises a non-magnetic drill collar, a circuit unit, a plurality of antennas and antenna tuning units corresponding to the antennas, wherein the non-magnetic drill collar serves as a carrier of the whole device and is provided with a compensation resistivity detection point. The circuit unit is installed inside the non-magnetic drill collar. The antenna tuning units are distributed on the outer circular surface of the non-magnetic drill collar and connected with the circuit unit. The method includes common resistivity measurement and azimuthal resistivity measurement, the distance between the device and the formation interface is calculated through the azimuthal resistivity measured value, previous real-time geological data are provided for well drilling, and the purpose of optimizing the well drilling quality is realized.

Description

technical field [0001] The invention relates to a device and method for geological exploration using azimuth resistivity while drilling to detect formation boundaries in petroleum exploration drilling engineering. Background technique [0002] In drilling engineering, drilling workers and geological engineers need to keep abreast of the working status of downhole tools, the shape of wellbore trajectory, and the parameters of formation and bottomhole environment. Real-time geosteering is very important for oil and gas exploration. The purpose of geosteering is to keep the drill bit traveling in the oil layer as much as possible, which requires real-time knowledge of the distance between the bottom hole tool and the formation interface. [0003] Conventional electromagnetic wave resistivity logging tools use a longitudinal coil system arranged along the tool axis (that is, the magnetic dipole direction of the coil is coaxial with the tool) to measure formation resistivity. Th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B49/00E21B47/092
CPCE21B49/00E21B47/092Y02A90/30
Inventor 陆永钢王翔
Owner 上海神开石油测控技术有限公司
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