Geosteering method for landing horizontal well

A technology for geosteering and horizontal wells, applied in directional drilling, earthwork drilling, wellbore/well components, etc., can solve the problem of waste in the horizontal section and achieve the effect of reducing waste

Inactive Publication Date: 2011-08-24
邱世军
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Problems solved by technology

Moreover, the method has simple steps, simple operation, and is effective. It can effectively solve the problem of wasting the horizontal s...

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  • Geosteering method for landing horizontal well
  • Geosteering method for landing horizontal well
  • Geosteering method for landing horizontal well

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Embodiment Construction

[0016] The present invention will be further described below in combination with specific embodiments.

[0017] A method for geosteering when a horizontal well lands according to the present invention is characterized in that the method includes the following steps.

[0018] Step 1: Predict the maximum distance from the wellbore trajectory to the top boundary of the target layer. When the wellbore trajectory lands, it will gradually move away from the top boundary of the target layer, and the distance from the farthest point to the top boundary of the target layer is maximum distance. In this example, according to the geological design book, the sedimentary facies of this block is characterized by delta outer front facies deposition, with a large area of ​​sheet sand and continuous sand bodies. There are two adjacent wells around the landing point of this well, and the thickness of the target layer Therefore, it is predicted that the target layer of this well is consistent wi...

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Abstract

The invention discloses a geosteering method for landing a horizontal well and relates to the technical field of well-drilling exploration and development of petroleum and natural gas, in particular relates to a geosteering method for landing a horizontal well after the sloping section is completed in the horizontal well drilling process. The geosteering method is characterized in that the target formation is exploited at a stable angle of inclination along the well trajectory with a certain deviation angle after the sloping section is completed before landing; when the on-site real-time data indicate that the target formation is reached, the target formation is drilled with an increasing angle of inclination until the well trajectory is parallel to the formation dip; and when the sand rock of the target formation is in the optimum display position, the target formation is drilled with a stable angle of inclination. Based on the on-site actual drilling data of the target well and the comprehensive consideration of two possibilities of vertical depth in advance and vertical depth delay of the target formation, the waste of horizontal sections is effectively reduced and the well trajectory is effectively protected from drilling through the target formation.

Description

technical field [0001] The invention relates to the technical field of exploration and development of oil and natural gas wells, in particular to a geosteering method suitable for the horizontal well drilling process when the horizontal well lands after the build-up section is completed. Background technique [0002] At present, in the field of drilling exploration and development technologies such as oil and natural gas, and in horizontal well operations, logging-while-drilling tools, measurement-while-drilling tools and on-site comprehensive logging tools are used. The measurement-while-drilling tool and the logging-while-drilling tool are located not far from the drill bit, and obtain various data of the formation and wellbore trajectory data while the drilling rig is drilling, including well deviation, azimuth, natural gamma ray, depth and shallow lateral resistance rate etc. The on-site comprehensive mud logging tool obtains drilling time, cuttings, fluorescence, gas l...

Claims

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Application Information

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IPC IPC(8): E21B47/022E21B7/04
Inventor 邱世军
Owner 邱世军
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