Intelligent monitoring method aiming at well drilling overflowing and leakage

Abstract

The invention discloses an intelligent monitoring method aiming at well drilling overflowing and leakage, belonging to the well drilling monitoring technology. On the basis of the existing hardware device, the method comprehensively utilizes the information of a plurality of site sensors, imitates the experience of experts to put forward the reasonable judgment of accidents such as overflowing, leakage and the like as well as the regulation of alarm control, and realizes automatic monitoring and alarm control by a computer. By using the method, the capability of treating multiple information of the computer can be fully exerted, automatic monitoring wok can be realized under the unsupervised condition, leads the alarm of accidents to be more timely and accurate, reduces the probability offalse alarm, and well solves the problems in oil field well drilling production.

Description

technical field [0001] The invention relates to an automatic monitoring method for overflow and lost circulation accidents in the drilling process, and belongs to the technical field of drilling monitoring. Background technique [0002] In the process of oil drilling, overflow and lost circulation are frequent accidents. When the formation pore pressure is greater than the bottom hole pressure, the liquid in the formation pores will soak into the well, causing the liquid level of the mud pool to rise and cause overflow; if there is a leakage channel and a certain accommodation space in the formation, or the wellbore fluid column pressure is greater than the formation pore pressure , leakage will occur. The occurrence of overflow and lost circulation will bring great economic losses to drilling operations, and it is very easy to cause accidents and casualties. [0003] In order to reduce the losses caused by overflow and lost circulation, the existing solutions are mainly t...

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Problems solved by technology

However, such monitoring technology only pays attention to the monitoring object and the selection of monitoring equipment, but the research on the comprehensive utilization of sensor information and accident judgment is not deep enough. For example, the Chinese patent No. 200610112449. In the "method", three sensors of sonar, radar and pressure are used to monitor the liquid level. Its main work is to give the installation scheme of the three sensors and the liquid level monitoring scheme, but it does not give the method of comprehensively utilizing the sensor information and the method of accident judgment.

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