Three-dimensional (3D) horizontal well drilling construction method

Abstract

The invention discloses a three-dimensional (3D) horizontal well drilling construction method, and belongs to the technical field of oil and gas well drilling. According to the method, a directional inclined well section is four sectioned; the 3D angle building variable-azimuth well section drilling build-up rate of a second section and the two-dimensional angle building variable-azimuth well section drilling build-up rates of a first section and a fourth section are identical, so that the technical shortages that tool build-up rates need to be adjusted usually for the reason that build-up rates in the traditional construction method are changed continuously and pulling out of a hole and drilling down are performed frequently are overcome; meanwhile, the angle building variable-azimuth well section turning direction tool face angle of the second section is a constant all the time, and the time and construction amount to put a tool face are saved. By the construction method disclosed by the invention, well drilling and directional construction are performed conveniently; the heterogeneous reservoir shooting probability is improved; the traditional drilling tool equipment is used, the construction time in the same case can be shorted by above 25%; the construction efficiency is greatly improved; the construction difficulty is reduced; the construction costs are reduced by above 17%; the costs are greatly reduced; the construction method is suitable for actual production.

Description

technical field [0001] The invention belongs to the technical field of petroleum and natural gas drilling, and in particular relates to a three-dimensional horizontal well drilling construction method. Background technique [0002] In the field of oil and gas technology, in order to improve the degree of reservoir production, save the land acquisition area of ​​the well site, protect the environment and reduce drilling costs, sometimes three-dimensional wellbore orbital drilling construction is carried out. In the oil (gas) area, the horizontal sections of each single well are parallel to each other, which requires three-dimensional wellbore track construction, which is difficult to construct. However, for the oil and gas fields formed by fluvial deposits such as Daniudi Gas Field, Honghe Oilfield and Jinghe Oilfield, the reservoirs are highly heterogeneous, and it is difficult to accurately land on the A target, and the difficulty of construction is even more difficult. ...

AI Technical Summary

Problems solved by technology

[0002] In the field of oil and gas technology, in order to improve the degree of reservoir production, save the land acquisition area of ​​the well site, protect the environment and reduce drilling costs, sometimes three-dimensional wellbore orbital drilling construction is carried out. In the oil (gas) area, the horizontal sections of each single well are parallel to each other, which requires three-dimensional wellbore track construction, which is difficult to construct

However, for oil and gas fields formed by fluvial deposits such as Daniudi Gas Field, Honghe Oilfield and Jinghe Oilfield, the reservoirs are highly heterogeneous, and it is difficult to accurately land on the A target, making the construction even more difficult.

[0003] At present, there is no relatively successful construction method for the three-dimensional borehole trajectory of horizontal wells in heterogeneous reservoirs. Or cylindrical helical design, the tool face angle is changing in real time, and a lot of time and energy are spent on adjusting the tool face; (2) The tool build-up rate is constantly changing with the change of the well inclination angle, and the tool build-up rate must be adjusted frequently. The number of drilling times is high, the drilling time is low, and the wellbore instability is prone to occur; (3) Due to the heterogeneity of the reservoir, there are "concerns" during the landing process, and the construction process is blind, which may easily lead to misses; (4) In the process of directional construction of self-made inclined points, the directional azimuth is generally based on empirical values, which causes great difficulties for the subsequent three-dimensional torsional azimuth

[0004] Judging from the drilling practice in the Ordos Basin of the North China Branch Company, at present, the traditional third-generation deflection directional tool system is used to complete the three-dimensional wellbore trajectory of the horizontal well in the heterogeneous reservoir. It takes more than 30 days, the construction time is long, and the construction volume is large; the fourth-generation directional system is adopted, that is, the rotary steerable drilling system, and the construction realizes real-time monitoring and control, and the construction time is short, but only this daily construction costs more than 200,000 yuan, which is high cost , which is not conducive to the actual use of oil (gas) drilling in domestic oil fields, and the third-generation phasing tool system, the daily directional cost is only about 20,000 yuan, which is only about one tenth of the fourth-generation directional system, so Research card develops a method using conventional drilling equipment

Images