Well drilling analysis method

An analysis method and drilling technology, applied in the field of drilling analysis, can solve the problem that the drilling parameters of the drilling tool assembly cannot be given, etc.

Pending Publication Date: 2020-10-27
SINOPEC SSC +2
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Problems solved by technology

[0003] The existing analysis and research method on drilling is to study the interaction between the drill tooth and the formation, often by establishing the mechanical model of the drill tooth and rock, and the research focus is on the threshold WOB and threshold torque. The research metho

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Embodiment Construction

[0030] The core of the present invention is to provide a drilling analysis method, which can simulate results closer to real drilling conditions, and provide reasonable drilling tool combinations, drilling parameters and suitable drilling tools according to the simulation results.

[0031] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0032] Please refer to Figure 1-Figure 4 , the embodiment of the present invention provides a drilling analysis method, comprising the following steps:

[0033] Step S100, establ...

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Abstract

The invention discloses a well drilling analysis method. The well drilling analysis method comprises the steps that S100, establishing a finite element model based on drilling speed-drilling tooth-stratum drilling simulation; S200, solving and analyzing the finite element model by adopting a display integral algorithm to obtain bit pressure and torque borne by the drill teeth at the correspondingrock breaking speed; and S300, giving the rock breaking speed matched with the drilling tool combination used in the drilling site or the drilling tool combination matched with the rock breaking speedexpected to be achieved in the drilling site according to the bit pressure and torque borne by the drilling teeth at the corresponding rock breaking speed. According to the drilling analysis method,the bit pressure and the torque required for reaching a certain mechanical drilling speed drill tooth are directly studied; the real-time drilling rock breaking process in the drilling engineering canbe more truly simulated, the on-site actual drilling working condition can be more accurately reflected, then a more reasonable calculation result is obtained, a reference can be provided for drilling acceleration evaluation, and a reference basis is provided for solving the problems of drilling design, drilling tool combination optimization, drilling parameter optimization and the like in the on-site actual drilling engineering.

Description

technical field [0001] The invention relates to the technical field of oil and gas exploration and development, in particular to a drilling analysis method. Background technique [0002] In the process of oil and gas and coal exploration and development, drilling costs account for 50% to 80% of the total exploration and development costs. Seriously, the occurrence of downhole accidents and low ROP have become the key factors that increase drilling costs. How to reduce the probability of downhole accidents and increase the ROP of drilling to reduce drilling costs has always been a technical problem that field engineers want to solve urgently. Therefore, the study of the rock breaking law of the drill bit has always been a hot research topic. According to the actual drilling data on site, the use of reasonable drilling design, reasonable drilling tool combination, appropriate drilling parameters and suitable drilling tools can greatly increase the ROP of drilling, shorten the...

Claims

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Application Information

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IPC IPC(8): G06F30/23
Inventor 王旭明兰凯李帮民杨玄王惠文刘香峰
Owner SINOPEC SSC
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