Layering continuous well testing system and use method thereof

Abstract

The invention provides a layering continuous well testing system and a use method thereof. The layering continuous well testing systems which are placed in a casing at interval comprise drainage test assemblies, straddle assemblies, and perforation assemblies connected from top to bottom. The cut-through cavity of the drainage test assemblies is communicated with the cut-through cavity of the straddle assemblies, to form a production channel. The straddle assemblies comprise a pressure transmitting joint, an upper packer, an upper pilot-controlled sieve tube, a lower packer, and a lower pilot-controlled sieve tube. In the production channel, pressure transmitting pipes which extend from the pressure transmitting joint and are communicated with an ignition head are arranged at interval. The pressure transmitting hole on the pressure transmitting joint is communicated with the upper port of the pressure transmitting pipe, to form a pressurization channel. The upper pilot-controlled sieve tube is provided with a first diversion channel which is separated from the production channel. The pressurization channel is injected with fluid, so the first diversion channel is communicated with the production channel. The lower pilot-controlled sieve tube is provided with a second diversion channel which can be connected with the production channel. Fluid is injected to make the second diversion channel separated from the production channel. The system can perform well testing on an upper layer and a lower layer.

Description

technical field [0001] The invention relates to the technical field of petroleum exploration and development, in particular to a system capable of layered continuous oil testing and a method for using the system. Background technique [0002] In oil testing wells, if there are multiple target intervals that need to obtain oil testing data separately, layered oil testing is required. In the traditional layered oil testing method, the lower bridge plug or cement injection plug is used to seal the tested layer, and then return to the upper layer for oil testing layer by layer. Injecting cement plugs has a long construction period, slow speed, and high cost, and is likely to cause pollution to the oil and gas reservoirs. Moreover, the cement plugs need to be drilled off when the oil test is completed and put into production. [0003] An existing oil testing string can seal off the penetrated layer located above, and then carry out perforation, testing, liquid drainage and recon...

AI Technical Summary

Problems solved by technology

However, it can only be constructed for the layer to be tested under the lower packer, and the test operation cannot be carried out for the opened layer between the upper packer and the lower packer

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