Stratum tester

Abstract

The invention discloses a stratum tester, which changes the integral structure in the prior art and is convenient for disassembly and assembly under the situations of maintenance, failure elimination and the like. The stratum tester adopts a module-type structure and comprises a hydraulic power short section for providing hydraulic power, a probe short section for setting stratum, extracting stratum liquid, monitoring stratum pressure, obtaining and recording the monitoring data of the stratum pressure during the extracting process, a fluid characteristic analysis short section for carrying out fluid characteristic analysis on the stratum liquid, a pump exhausting outlet control short section for pumping unqualified stratum liquid according to the results of the fluid characteristic analysis and sampling the qualified stratum liquid to obtain the sampling result, and an electronic line short section for receiving a ground control command, converting the stratum control command into a control signal and transmitting the monitoring data and the sampling result to a ground control system. The stratum tester adopts a module-type structure and is beneficial to the failure diagnosis, maintenance and service of the tester.

Description

technical field [0001] The invention relates to a petroleum exploration instrument, in particular to a stratum tester. Background technique [0002] A formation tester, also known as a formation fluid sampler, is a testing device that is lowered into a well through a cable. During the test, various pressure data of the test formation can be continuously recorded on the ground, and fluid samples can be taken out at the same time. Through the analysis of samples, data such as fluid type, properties and oil-gas ratio can be obtained. [0003] However, the existing formation tester needs a smaller pumping speed in order not to damage the setting under certain formation conditions. But in this way, the purpose of the test cannot be achieved or the measurement is inaccurate, and even qualified formation fluid cannot be extracted. However, under other conditions, existing formation testers cannot obtain samples with a pressure above the bubble point, that is, they cannot obtain ...

AI Technical Summary

Problems solved by technology

[0003] But the existing formation tester, in some formation conditions, in order not to damage the setting, requires a smaller pumping speed

However, in this way, the purpose of the test cannot be achieved or the measurement is inaccurate, and even the qualified formation fluid cannot be extracted.

However, under other conditions, existing formation testers cannot obtain samples above the bubble point pressure, that is, they cannot obtain real formation fluid samples.

In addition, the existing formation tester is designed as a whole, which is not conducive to disassembly, maintenance and fault diagnosis

[0004] To sum up, the existing formation testers cannot work well in a variety of formation conditions due to the constraints of design and some application environments, and it is difficult to disassemble and install the integral structure design, maintenance and fault diagnosis.

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