EIT experimental device and method for monitoring dynamic state of commingled production reservoir fluid production profile of multi-branch fault-solution-body oil and gas reservoir

Abstract

The invention discloses an EIT experimental device and method for monitoring the dynamic state of a fluid production profile of a commingled production reservoir of a multi-branch fault-solution oil and gas reservoir, the EIT experimental device comprises a device main body and ERT and ECT sensing assemblies, the device main body is internally provided with at least two cavities for placing ice and clay for simulating a fault-solution branch reservoir, and the two ends of the device main body are provided with a fluid injection port and a fluid output port; the ERT sensing assembly and the ECT sensing assembly are arranged on the side wall of the device body, communicated with all the cavities of the device body and used for collecting the resistivity and capacitance coefficient space numerical values of a measured area in real time. The device can independently simulate the production process of the commingled production reservoir of the fault-karst oil and gas reservoir under different fluid types, different temperature / pressure systems and different production systems, can monitor the dynamic change of the liquid production profile in real time, and is high in independence and utilization rate; in addition to basic functions of simulating production and monitoring dynamic states, the device can be externally connected with other similar devices to realize a more complicated reservoir commingling production simulation experiment, and is powerful in function and good in open expansibility.

Description

technical field [0001] The invention relates to the technical field of oil and gas field development experiments, in particular to an EIT experimental device and method for monitoring the fluid production profile dynamics of multi-branched fault-karst body oil and gas reservoirs. Background technique [0002] There are three basic forms of electrical tomography, namely electrical capacitance tomography (ECT), electrical resistance tomography (ERT) and electromagnetic tomography (EMT), where ERT and ECT are collectively called electrical impedance tomography (EIT). )technology. EIT technology is a branch of process tomography technology, which belongs to the cutting-edge technology of modern industrial inspection. Because of its advantages of non-invasive, non-radiation, and online measurement, it has been widely used in geological exploration, industrial process and environmental monitoring. [0003] The trap oil reservoir (fault-karst reservoir) controlled by faults and d...

AI Technical Summary

Problems solved by technology

Fault-karst reservoirs are the main force for increasing production in my country's Tahe and Shunbei oilfields, but such reservoirs generally have problems such as low recovery rate and unclear production contribution of each fracture-cavity body, which seriously restricts the efficient development of fault-karst reservoirs

[0004] At present, there is a lack of physical experimental devices in the laboratory to test the fluid production profile of multi-branched fault-karst reservoirs.

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