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A formation tester and modular technology, applied in the field of oil and gas exploration, can solve the problems such as the inaccurate formation of the sampling port in the sealing area of the probe, the use of the deformed seat seal of the packer, the blockage of the sampling port area, etc. The effect of fast sampling and convenient positioning
Active Publication Date: 2016-04-06
BC P INC CHINA NAT PETROLEUM CORP +1
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[0003] The FDT modular formation tester is widely used in the field of petroleum logging, but the commonly used FDT modular formation tester probes in loose formations are often deformed due to long-term use of the packer or failure of the sealing due to formation collapse, or due to the failure of the sampling port. The area is too small to block; in thin oil layers and low-permeability formations, the probe often fails to find the formation because the sealing area is too small, or the test fails because the sampling time is too long
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[0028] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings.
[0029] The probe of the new FDT modular formation tester involved in the embodiment of the present invention increases the area of the formation sealed by the packer, and several diversion grooves are added next to the sampling port of the packer, which is conducive to the removal of fluid samples , so that the FDT modular formation tester can be used more effectively and safely in unconsolidated formations, thin oil layers and low-permeability formations; it makes the FDT modular formation tester more reliable in setting, more convenient in positioning, and faster in sampling; FDT module The use of the type formation tester is more convenient and reliable, the application is wider, and the effect is more prominent.
[0030] Such as figure 1 , the FDT modular f...
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Abstract
The invention discloses a probe of an FDT (Formation Dynamic Test) module type formation tester of a formatting dynamic monitoring system, belonging to the technology of oil-gas exploration. The probe comprises a probe piston, a packer, a probe body, a connecting plate, a connecting screw, a filter sleeve, a filter piston, a probe plug, an elastic block, a positioning sleeve, a baffle ring, a piston body, a pressure-limiting valve, a guide block, a fixing screw and a fluid conveying pipe. According to the probe disclosed by the invention, the area of a formation which is packed by the packer is enlarged, a plurality of diversion trenches are added beside a sampling port of the packer, consequently, liquid sampling is facilitated, and the FDT module type formation tester can be more effectively and safely used in an unconsolidated formation, an oil sheet and a low permeable formation; the FDT module type formation tester is more reliable in sealing, more convenient in positioning and faster in sampling; and the FDT module type formation tester is more convenient and reliable to use, wider in application range and more outstanding in effect.
Description
technical field [0001] The invention relates to oil and gas exploration technology, in particular to an FDT modular bottom tester probe. Background technique [0002] FDT (FormationDynamicTestSystem) modular formation test system is an instrument for testing formation pressure and directly sampling formation fluid during oil and gas drilling and development. The FDT modular formation test system is the most direct and effective system for verifying reservoir fluid properties, dividing oil-water and oil-gas interfaces, and obtaining formation productivity in oil and gas exploration. It is the key equipment urgently needed in my country's oil exploration and development. It is one of the main technologies that provide the basis for quality and production potential and formulate a reasonable development plan. [0003] The FDT modular formation tester is widely used in the field of petroleum logging, but the commonly used FDT modular formation tester probes in loose formations a...
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