An integrated device for testing and sampling combined with perforation

Abstract

The invention provides an integrated device for testing and sampling combined with perforation. The integrated device for testing and sampling combined with perforation includes a vacuum sampling cylinder, a pressure control switch and a packer. The testing and sampling integrated device combined with perforation is set at a predetermined position in the well. The perforating gun is located at the lower end of the packer. The pressure control switch is located at the lower end of the perforating gun. When the outlet fluid pressure rises, the pressure-controlled switch is triggered by the pressure, and the liquid inlet hole on the pressure-controlled switch is opened to allow liquid to enter the vacuum sampling cylinder for formation testing in the vacuum sampling cylinder. The upper end is connected with the pressure control switch through a joint collar, and the vacuum sampling cylinder is a liquid sampling device and is evacuated in advance. The testing and sampling integrated device combined with perforation can realize the integration of perforating, testing and high-pressure physical property sampling, and can completely replace the current complex open hole / completion formation testing.

Description

technical field [0001] The invention relates to the technical field of stratum testing, in particular to an integrated device for testing and sampling combined with perforation. Background technique [0002] Formation testing technology is a method to finally determine the properties of oil and gas reservoirs. It is not only fast and economical, but also can directly record the parameters of oil and gas reservoirs under production status from a dynamic perspective. It can discover and correctly evaluate oil and gas reservoirs in time and serve the whole process of oil and gas exploration and development. The construction process is to lower the test tool into the test interval through the tubing, and use the ground operation to seal the packer, isolate the mud / perforation fluid and other intervals from the test layer, and then control the ground to open the downhole test The valve allows the formation fluid in the test interval to flow into the pipe string through the scree...

AI Technical Summary

Problems solved by technology

[0013] The above formation testers have been widely used at present, but their defects are very obvious: 1. The core tool structure is complex and difficult to maintain; 2. There are many related tools, the pipe string is complicated, and it is prone to failure in the downhole; 3. The construction process is complicated. High quality and experience requirements for construction personnel; 4. The core tools need to be imported, and the technology is controlled by others; 5. The sampling volume of high-pressure physical properties is small, no more than 2000ml, resulting in small formation pressure fluctuations and short detection pressure radius; 6. High cost

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