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Stratum deflecting property evaluation method

An evaluation method and stratum technology, applied in the direction of earthwork drilling and production, borehole/well components, etc., can solve the problems of instrument stress and calculation result deviation, inability to accurately judge stratum deflection, etc., so as to avoid operation failure and evaluate The method is simple and reliable

Pending Publication Date: 2020-09-22
CHINA OILFIELD SERVICES
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Problems solved by technology

[0003] However, in actual operation, due to formation factors, there is a large deviation between the force of the instrument and the calculation results, and it is impossible to accurately judge the deflection of the formation.

Method used

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  • Stratum deflecting property evaluation method
  • Stratum deflecting property evaluation method
  • Stratum deflecting property evaluation method

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Embodiment Construction

[0019] In order to make the purpose, technical solution and advantages of the application clearer, the embodiments of the application will be described in detail below in conjunction with the accompanying drawings. It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined arbitrarily with each other.

[0020] During the directional drilling process of the push-on rotary steerable drilling system, the on-site engineer corrects the pressure of the hydraulic system according to the deflection effect of the rotary steerable instrument in the formation (the change of the well deflection), thereby correcting the resultant steering force to achieve deflection deflection. Effect control. However, due to the different characteristics of the formation such as softness and hardness, the reaction force of the formation to the pushing rib is not necessarily 100% (that is, the reaction force of the for...

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Abstract

The embodiment of the invention provides a stratum deflecting property evaluation method. The evaluation method comprises the following steps that a pushing type rotary guiding instrument is put intoa well; a guiding rib of the pushing type rotary guiding instrument moves to push against the well wall, and a drill bit is deflected in the preset direction to achieve guided drilling; the reactive force of the outer wall of the instrument to the guiding rib is monitored when the pushing type rotary guiding instrument drills; and according to reactive force value obtained through monitoring, thedeflecting property of stratum is judged. By means of the stratum deflecting property evaluation method provided by the embodiment of the invention, the deflecting property of stratum can be measuredand evaluated conveniently and rapidly, and subsequent well drilling operation is facilitated.

Description

technical field [0001] This application relates to but not limited to the field of drilling formation testing, especially a method for evaluating formation deflection. Background technique [0002] The rotary steerable drilling system is one of the most important cutting-edge equipment in the field of petroleum directional well engineering today. It integrates mechanical, electrical, hydraulic, information and control technologies. The system (LWD) cooperates to complete steerable drilling. It is the core technology and important equipment to realize the development of oil drilling in the direction of digitalization, informationization and automation. Steering operations for special drilling techniques such as wells. Among them, the push-on rotary steerable drilling system is composed of power generation module, power transmission module, mechanical and execution unit, hydraulic system, measurement system, etc. During the drilling process, the mud provides power to drive th...

Claims

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Application Information

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IPC IPC(8): E21B49/00
CPCE21B49/00Y02A10/23
Inventor 赵宏宇兰洪波邹文浩于东升饶浩伍勤薛牟奇朱辉
Owner CHINA OILFIELD SERVICES
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