Formation pressure measuring and balancing device and its measuring method
A formation pressure and balancing device technology, applied in surveying, earth-moving drilling, wellbore/well components, etc., can solve the problems of difficulty in layout and design of formation pressure measurement system while drilling, narrow drill string space, and lack of technical data, etc. Achieve the effect of saving internal layout space, wide application range and simple overall structure
Active Publication Date: 2021-08-13
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology
[0004] However, due to the harsh working environment of formation pressure measurement while drilling, the structure of the formation pressure measurement while drilling instrument is more complex than other downhole instruments, and the internal space of the drill string is small, and it is necessary to keep hydraulic fluid, formation fluid and drilling fluid. This kind of fluid channel, because the pressure of the formation just drilled is very high when measuring, it brings great difficulty to the layout and design of the formation pressure measurement system while drilling, and there is also a large technical risk
At present, there are few researches in this technical field at home and abroad, and there are few technical materials for reference.
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[0036] In order to make the technical solutions and advantages of the present invention clearer, the exemplary embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all implementations. Exhaustive list of examples. And in the case of no conflict, the embodiments and the features in the embodiments of the present invention can be combined with each other.
[0037] The inventor noticed during the invention that because the working environment of the formation pressure measurement while drilling is very harsh, with high pressure, high temperature and complex formation conditions, more stringent requirements have been proposed for the pressure and temperature that the formation pressure measurement while drilling instrument can withstand. requirements. Compared with other downhole instruments, the existing form...
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The present invention proposes a formation pressure measurement and balance device and its measurement method. The device includes a body, and inside the body are: a power source and a control assembly, which are used to receive control signals and provide power; annulus pressure conduction Components, which are used to seal off the annular pressure chamber on the body and conduct annular pressure, and connect the power source and control components through pipelines inside the body; probe components, which are connected to the power source and control components are connected through pipelines, and can realize setting and unsealing with the well wall under the action of the power source and control components; the suction balance mechanism is connected with the power source and the The control assembly, the probe assembly and the annular pressure transmission assembly are connected to achieve pressure balance inside and outside the body for formation pressure measurement. The device can be used for formation pressure measurement, and can reduce the layout difficulty of the formation pressure measurement system while drilling.
Description
technical field [0001] The invention relates to the technical field of petroleum drilling and well logging, in particular to a formation pressure measuring and balancing device and a measuring method thereof. Background technique [0002] Formation pressure is an important parameter to describe reservoirs. Utilizing formation pressure can optimize mud density and equivalent circulation density, prevent well kick, blowout, formation damage or accidental formation fracturing and circulation loss, and help predict and correct formation pressure algorithm. Utilizing formation pressure data can improve drilling efficiency, make better field decisions, and update geological models in a timely manner. [0003] In the prior art, the formation pressure is measured while drilling. This measurement method is to measure the formation as soon as the drill bit drills the formation. The drilling fluid has little pollution to the measured formation, and the pressure measurement accuracy is...
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IPC IPC(8): E21B47/017E21B49/00E21B47/06
CPCE21B47/06E21B49/00E21B47/017
Inventor 王磊郑俊华钱德儒宗艳波陈晓晖孙明光胡彦峰宋朝晖王立双
Owner CHINA PETROLEUM & CHEM CORP