Borehole tortuosity control method that can improve the effect of compound drilling in the horizontal section
A horizontal section and tortuosity technology, which is applied in the field of wellbore tortuosity control that can improve the composite drilling effect of the horizontal section, can solve the problems of under pressure and low sliding drilling speed, and achieve the effect of improving the effect and increasing the drilling speed
Active Publication Date: 2020-05-19
CHINA UNIV OF PETROLEUM (EAST CHINA) +2
View PDF5 Cites 1 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Due to the need to swing the tool face during sliding drilling, and the phenomenon of back pressure is common, the speed of sliding drilling is generally lower than that of composite drilling
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0034] Aiming at the technical problem of using compound drilling and sliding drilling alternately in the horizontal section and increasing the drilling speed, the present invention provides a wellbore tortuosity description method and a key parameter control method suitable for the characteristics of the horizontal section, including horizontal section trajectory control allowing The composite drilling section length, sliding drilling section length, maximum deviation of inclination angle and azimuth angle, etc. form a complete and practical set of wellbore tortuosity control methods that can improve the effect of composite drilling in the horizontal section.
[0035] (1) Description method of borehole tortuosity in horizontal section
[0036] "Wellbore tortuosity" should include the degree of deviation between the actual drilled wellbore trajectory and the designed wellbore trajectory, and key parameters such as the degree of curvature or distortion between the designed wellb...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention discloses a borehole sinuosity regulation and control method for improving composite drilling effects of horizontal segments. The method comprises a horizontal segment borehole sinuositydescription method, a horizontal segment borehole sinuosity regulation and control method, a key parameter calculation method, a horizontal segment composite drilling proportion prediction method, aplurality of strategies for improving the horizontal segment composite drilling proportion, a horizontal segment borehole sinuosity regulation and control process and the like. The method comprises the following steps of: determining a sliding drilling build-up rate, a composite drilling well deviation and a bearing rate according to practical drilling data; calculating an allowable maximum hole drift angle deviation, a maximum azimuth angle deviation, a composite drilling segment length and a sliding drilling segment length according to a formula; and regulating and controlling a horizontal segment borehole track according to the calculation result. According to the method disclosed by the invention, allowable composite drilling segment length, sliding drilling segment length, hole driftangle, azimuth angle maximum deviation and expected composite drilling proportion can be calculated. By applying the method to formulate horizontal segment borehole sinuosity regulation and control schemes, benefit is brought to improve the composite drilling proportion and drilling speed.
Description
technical field [0001] The invention relates to the field of petroleum drilling engineering, in particular to the field of slide steerable drilling technology research and application, in particular to a wellbore tortuosity control method capable of improving the composite drilling effect of a horizontal section. Background technique [0002] The designed wellbore trajectory (referring to the wellbore axis) in the horizontal section is usually a horizontal or approximately horizontal straight line. At present, sliding steerable or rotary steerable drilling technology is mostly used to drill the horizontal section. When using the slide-steering drilling technology, it is necessary to alternately adopt the sliding drilling method (large hole curvature) and the rotary drilling method (small hole curvature). When the rotary steerable drilling technology is adopted, high build-up rate commands (large borehole curvature) and low build-up rate commands (small borehole curvature) a...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/20E21B7/06
Inventor 史玉才滕志想管志川范致斌付成林杨卫星苗在强刘永旺
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)