China University of Petroleum

Zhanjiang Branch of Cnooc (china) Co., Ltd

Shujie Liu

Baojiang Sun

Zhiyuan Wang

Bangtang Yin

Hao Li

Yonghai Gao

Xiaohui Sun

Xuerui Wang

Tianbao Ding

Shen Guan

Baitao Fan

Haikang He

Yuhang Pang

Zhiming Yin

Meipeng Ren

A device and a method for early monitoring of gas intrusion based on pressure wave propagation are provided in the present disclosure. The technical solution is as follows. The lower end of the liquid storage tank is connected to the simulated wellbore through a liquid injection pipeline, a centrifugal pump, a pressure-stabilizing water tank, and a mass flowmeter. One end of the gas storage tank is connected to a screw air compressor, while the other end is connected to the simulated wellbore through an injection pipeline and a micro-orifice flowmeter. The gas-liquid mixer is provided at the upper end of the simulated wellbore, with the pressure-disturbing device connected below it. Multiple pressure sensors are provided at the middle of the simulated wellbore and connected to the computer via wires and an oscilloscope.

Device and method for early monitoring of gas intrusion based on pressure wave propagation

The present invention provides a method and equipment for optimizing hydraulic parameters of deepwater managed pressure drilling in real time. The method comprises: acquiring overflow parameters in the current drilling process, performing preprocessing and feature extraction on the overflow parameters, and inputting the overflow parameters into trained support vector machine identification models for overflow judgment. If overflow occurs at the current drilling depth, reducing an opening of a throttle valve and increasing a displacement of a submarine pump, measuring a wellhead back pressure and calculating a bottom hole pressure, and judging whether overflow continues is performed. If overflow continues, mixing high-density drilling fluid with the original drilling fluid, pumping the mixture into a wellbore annulus, and performing the above operations of reducing the throttle valve opening, increasing the displacement of the submarine pump, calculating the bottom hole pressure and judging whether overflow continues is performed until overflow no longer occurs.

Method and equipment for optimizing hydraulic parameters of deepwater managed pressure drilling in real time

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Zhanjiang, China

Shujie Liu