Southwest Mud Logging Intelligent Overflow Early Warning Well Control Safety Tool

Sinopec News Network reported in recent years, with the gradual advancement of oil and gas exploration and development, the safety of drilling operations has attracted more and more attention from oilfield companies and all sectors of society
.

Logging is the eye of drilling.
Logging is responsible for monitoring various engineering geological anomalies and discovering oil and gas reservoirs during drilling operations
.

Especially when there are major dangers such as lost circulation and well surge, the comprehensive mud logging unit can send out an alarm through abnormal parameters in the first time, and escort the safe drilling operation

However, the interval from the overflow to the well surge is very short, only one or two minutes or even tens of seconds
.

If the forecast is late, or the shut-in operation is slow, then it may evolve from an overflow to a strong gush or even a blowout, which may cause the shut-in to fail and cause incalculable losses

Market demand is scientific research goal

In 2016, in view of the characteristics of ultra-deep drilling, high pressure, and high well control risk coefficient in the Northwest Oilfield, Petrochemical Jingwei Southwest Logging Branch undertook the research and development of an intelligent overflow early warning system based on a thorough investigation of the market
.

The intelligent overflow early warning system uses network communication data interception, automated interfaces, file interaction and other technologies to obtain real-time data of integrated logging tools, and converts the changes of integrated logging parameters into data with the help of computer logic operations, big data technology, and digital model judgment mechanisms.
A set of intelligent overflow monitoring and early warning system software that realizes early analysis, early judgment, and early warning
.

However, at the beginning of research and development, many problems and difficulties were encountered
.

Difficulty resistance is the main direction of attack

　　Under normal drilling conditions, changes in outlet flow and pool volume are normal changes, and the overflow software is easy to distinguish
.

In case of tripping, starting and stopping the pump, drilling fluid mixing and pouring, etc.

　　Wu Tong, deputy director of the Research Institute of Petrochemical Jingwei Southwest Logging Branch, led the scientific research team to carry out scientific and technological research
.

They collected 87 overflow display data from 64 wells in the Shunbei, Shunnan, Shuntuo and Tahe blocks of the Northwest Oilfield from 2011 to 2016, and performed modules on the discrimination parameters, characteristic quantities, primary and secondary relationships, and weights according to different working conditions.

　　What should I do if there is a problem with the software? In response to various problems encountered during the installation and use of the intelligent early warning system, Liu Fuwen, the person in charge of the project tracking, used the methods of centralized training and individual guidance to train and guide instrument engineers and operators more than 100 times, and compiled "intelligent monitoring overflow early warning" The “System” user manual is convenient for the logging site personnel to learn and operate
.

　　Ensuring safety is the ultimate goal

　　The intelligent overflow early warning system has shown good results in practical applications
.

　　On May 19, 2020, the Shunbei 8X well was overflowing during the circulation of the drilling fluid.
The overflow software issued an abnormal alarm at 10:59:52 and 11:02:53, and the logging tool was at 11:02.
The monitoring outlet flow rate is 25.
5↑27.
07%, and the mud logging staff will call the driller on duty at 11:03.
The early warning system is about 3 minutes ahead of the on-site mud logging abnormal prediction
.

　　At 13:48 on September 24, 2020, the Shunbei 41X well was drilled to 7975.
85 meters and overflowed.
The outlet flow was 25.
8↑41.
5%.
The mud logging staff called the driller on duty at 13:48
.

The overflow software sends out an abnormal alarm at 13:47:02, and at 13:48:13, there is a three-level alarm for the outlet flow module, an alarm for the gas measurement module, an alarm for the pool volume module, and an overflow alarm

　　The "Intelligent Monitoring Overflow Early Warning System" developed by the Southwest Logging Branch has realized from scratch, from existence to excellence, simple and convenient operation, and increasingly perfect functions.
The abnormal alarm is generally about 100 seconds earlier than the abnormal alarm of the comprehensive mud logging unit
.

In 2017, the intelligent overflow warning system of Southwest Mud Logging Branch was fully promoted in the Northwest Work Area

　　At present, the system has been used in more than 300 wells in the Northwest Oilfield, providing timely warning of overflow more than 60 times, providing an important reference for on-site abnormal identification, gaining prime time for drilling safety, and becoming an important tool for protecting well control safety

　　(Li She Class)