An electronically controlled formation tester

Abstract

The invention relates to a petroleum exploration and development formation test method and equipment, in particular to an electrically controlled formation test method and a formation tester used by the same. The electrically controlled formation test method applies an electronic switch controlled by programmable software to replace a mechanical switch which is manually operated to achieve the function of the formation tester; meanwhile, multiple control modes are introduced, by means of setting which is conducted on parameters through the software and data which are detected by multiple sensors, the switch is opened or closed automatically at the right time, and therefore intellectualization of formation test is achieved; multiple electronic manometers which are separately equipped for an original formation tester are integrated in a system, and integration of the formation tester is achieved. The introduced electrically controlled switch is small in size and light in weight; in addition, due to the fact that all the manometers used in the test are integrated in the formation tester, the whole test tool is made to be small in size and light in weight, and micromation of the formation tester is achieved.

Description

technical field [0001] The invention relates to a method and equipment for stratum testing in petroleum exploration and development, in particular to an electronically controlled stratum tester. Background technique [0002] At present, when the formation test is carried out in the exploration and development of the oil field, the formation tester of the mechanical switch in the downhole is controlled by the method of lowering and lowering the test string of the ground operation equipment. The formation tester has the following problems: 1. There are many factors affecting the downhole mechanical switch of the manual operation of the ground lifting equipment to lift and lower the test pipe string, which is related to the downhole situation and the technical quality of the operator, especially in highly deviated wells and deep wells. , it is impossible to accurately observe the free point of the test string and affect the operation of the test switch, so the success rate of t...

AI Technical Summary

Problems solved by technology

The formation tester has the following problems: 1. There are many factors affecting the downhole mechanical switch of the manual operation of the ground lifting equipment to lift and lower the test pipe string, which is related to the downhole situation and the technical quality of the operator, especially in highly deviated wells and deep wells. , it is impossible to accurately observe the free point of the test string, which affects the operation of the test switch, so the success rate of the test cannot be guaranteed

2. The liquid hole of the mechanical switch is small and long, which will affect the performance of the switch or even cause the switch to fail when sand or heavy oil is produced in the formation.

3. Due to repeated stretching and compression of the test string when lifting and lowering the test string for many times, it is very easy to cause leakage of the string thread and make the test fail

Due to the large amount of supporting equipment for tools, the processing of tools and accessories is difficult, medium-sized trucks and hoisting equipment are used for tool delivery, and the cost of tools and accessories is high, which affects the comprehensive benefits of testing

5. There are many and complicated inspection and maintenance items: disassembly and assembly, sealing test, tension and pressure delay test must be carried out after each construction, and the workload of inspection and disassembly and disassembly and assembly during on-site construction is very large, so it must be controlled There are many key points, and the probability of tool failure is high

[0004] Since the switch state of the tester can only be controlled by the ground, the test time cannot be adjusted according to the production, fluidity, and pressure of the downhole formation, so qualified data and data may not be obtained, and there is no intelligent test function

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