Device and system for testing packer in formation tester

Abstract

The invention discloses a device and a system for testing a packer in a formation tester, and aims to test a newly-developed packer in a formation tester. In the test device, a first end of a simulation borehole sleeve is connected with a sleeve end cap, and a second end of the simulation borehole sleeve is sleeved inside a first end of an axial limiting sleeve and contacts the axial limiting sleeve; a protection ring is sleeved outside a contact part of the simulation borehole sleeve and the axial limiting sleeve; a test matrix is positioned in the simulation borehole sleeve and the axial limiting sleeve, and can be in circumferential seal with a sliding end cap of the packer; a first end of the test matrix can be in circumferential seal and fixedly connected with a fixed end cap of the packer, and a second end of the test matrix is connected with a second fixed head; and an expansion pressurizing pipe penetrates through an end face of the axial limiting sleeve and an end face of the second fixed head, and is communicated with a pipeline in the test matrix. The device and the system are used for performing simulation test on the charging pressure resistance and the setting sealability of the packer.

Description

Technical field [0001] The present invention relates to a test device for formation exploration equipment, in particular to a test device for a packer in a formation tester and a corresponding test system. Background technique [0002] The formation tester is pumped by circulating pumps to realize formation pressure measurement and undisturbed formation fluid sampling. By continuously pumping formation fluids, real-time determination of the properties of formation fluids, distinguishing whether the formation fluids belong to water, oil, gas or a mixture of several, and determining the properties of the formation fluids and maintaining stability, then perform undisturbed formation fluid sampling. [0003] With the increasing difficulty of oil and gas exploration, there are more and more complex formations with low porosity, low permeability, strong heterogeneity and fractures, and probe testing has shown certain limitations in these reservoirs. It is mainly manifested in poor pump ...

AI Technical Summary

Problems solved by technology

Mainly manifested in poor pump efficiency, low success rate, unable to meet the needs of rapid and direct judgment of fluid properties in complex formations

[0004] At present, the conventional setting probe of the formation tester can only carry out pressure testing and sampling on homogeneous formations with good permeability. For complex formations with low porosity, low permeability, strong heterogeneity and fractures, standard probes The formation cannot be isolated by setting, or when the tester is pumping, the probe area is too small, so that the tester cannot reach a suitable flow rate when the tester is pumping the formation fluid, and pressure measurement and sampling cannot be performed.

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