Heterogeneous reservoir horizontal well water control simulation experiment device and experiment method thereof

Abstract

The invention discloses a heterogeneous reservoir horizontal well water control simulation experiment device and an experiment method thereof. The device comprises a horizontal well shaft, a rock corecylinder, a testing liquid supply device and a monitoring system. The device can effectively simulate the output condition of a horizontal well by a water control process under the condition of different water contents on heterogeneous distribution stratums of a horizontal section and on each layer section, and is used for simulating the production performance of the horizontal well and evaluating the yield increasing effect of a water control technology so as to guide efficient development of the horizontal well.

Description

technical field [0001] The invention belongs to the technical field of petroleum engineering, and in particular relates to a water control simulation experiment device and an experiment method for horizontal wells in heterogeneous oil reservoirs. Background technique [0002] In the process of oil and gas development, in order to increase the drainage area of ​​the production layer, horizontal wells are often used for development. Due to reservoir heterogeneity, heel-toe effect, and fluid property differences, it is easy to cause premature water breakthrough in horizontal wells. Once the water cone breaks through, the water cut will rise rapidly, which will seriously affect the oilfield development benefits. Due to the existence of fractures in fractured carbonate reservoirs and fractured reef limestone reservoirs, due to factors such as fracture width and oil-water viscosity difference, fluid seepage is not balanced in fractures, which can easily lead to water cone breakthr...

AI Technical Summary

Problems solved by technology

Due to reservoir heterogeneity, heel-toe effect, and fluid property differences, etc., it is easy to cause premature water breakthrough in horizontal wells. Once the water cone breaks through, the water cut will rise rapidly, seriously affecting oilfield development benefits

Due to the existence of fractures in fractured carbonate reservoirs and fractured reef limestone reservoirs, due to factors such as fracture width and oil-water viscosity difference, fluid seepage is not balanced in fractures, which can easily lead to water cone breakthrough, thereby affecting production; Due to differences in porosity and permeability, sandstone reservoirs are prone to local water breakthrough. At the same time as water breakthrough, due to the dragging effect of water, the risk of sand production is increased, which seriously affects the development effect

[0003] At present, there are experimental devices for water control in horizontal wells that are based on subsections in the wellbore, but there is no experimental device that simulates the comprehensive environment inside and outside the wellbore, nor can it simulate the formation and oil-water two-phase flow in the wellbore. Therefore, , in order to effectively simulate the production of horizontal wells under the condition of heterogeneously distributed formations in horizontal sections and different water cuts in each section, there is an urgent need for a water control simulation experimental device for horizontal wells in heterogeneous reservoirs

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