Intraformationally heterogeneous model oil-water displacement efficiency evaluation system
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An evaluation system and water flooding technology, applied in the direction of production fluid, measurement, wellbore/well components, etc., can solve the problems of inability to realize stratification measurement, measurement of permeable layer parameters, and evaluation of oil displacement efficiency, etc.
Active Publication Date: 2011-06-15
PETROCHINA CO LTD
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Its disadvantage is that the existing core holder has a liquid inlet and a liquid outlet, which can only measure the change of the overall oil displacement efficiency of the multi-layer core model during the water injection process, but cannot realize layered measurement
And only the poro
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Embodiment 1
[0021] Inner heterogeneity model test system of embodiment 1 layer
[0022] Such as figure 1 As shown, the intralayer heterogeneous model test system consists of displacement system A, overburden system B, pressure measurement system C, core holder D and metering system E.
[0023] The displacement system consists of two high-pressure metering pumps, which can deliver two fluids at the same time, and are the power source for displacement. Flow rate range: 0.001-15ml / min, maximum pressure: 70MPa.
[0024] The overburden pressure system consists of pumps, such as the JB-800 pump set, which are used to add confining pressure to the core holder and core to simulate the overburden pressure. The maximum confining pressure is 70MPa.
[0025] The pressure measurement system consists of multiple pressure sensors, two high-pressure pressure sensors with a range of 70MPa, connected to the displacement pump, and three low-pressure sensors for measuring the pressure at both ends of the ...
Embodiment 2
[0030] The intralayer heterogeneous model test system described in Example 1 was used, wherein, displacement system A (Quizix SP-5200 pump set), overburden system B (JP-800 pump set), pressure measurement system C (PLV -1 pressure transmitter).
[0031] The cores are from the EsII and EsIII layers of Jidong Oilfield, hydrophilic, and the size is 7.5cm×4.5cm×1.5cm; the salinity of formation water is 3729mg / L; the oil used in the experiment is neutral white oil, and the oil-water viscosity ratio is 10.3 .
[0032] The basic physical parameters of the core are shown in Table 1.
[0033] Table 1. Core basic parameters
[0034]
[0035] A group (three) flat single-layer cores with known bound water saturation and oil phase permeability are arranged in anti-rhythm, put into the core holder, and the confining pressure is 10MPa. The core was displaced with oil at a rate of 3.0ml / min, and the oil output and rate of each layer were measured. Then the water flooding experiment was...
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Abstract
The invention relates to an intraformationally heterogeneous model testing system. The rubber cylinder of a multilayered core holder is arranged in a shell; a left core pressing head and a right core pressing head are pressed to the two ends of a multilayered core model; a core accommodating chamber for accommodating the multilayered core model is formed among the inner wall of the rubber cylinder, the left core pressing head and the right core pressing head; a closed annular confining pressure room is formed among the outer wall of the rubber cylinder, a left fixing sleeve, a right fixing sleeve and the inner wall of the shell; the shell is provided with a confining pressure interface which is communicated with the annular confining pressure room and an overburden pressure system; a liquid inlet is formed in the left core pressing head and is communicated with a displacement system and the core accommodating chamber by a pressure measurement system; a liquid outlet is formed in the right core pressing head and is communicated with the core accommodating chamber and a metering system; and a strip liquid outlet gasket corresponds to a joint between two adjacent layers of core models on the right core pressing head, so that flowing liquid which passes through every layer of core model flows out of the liquid outlet of the corresponding layer. The system can accurately reflect the changing law of intraformationally heterogeneous oil-water displacement in mixed water injection layer mining.
Description
technical field [0001] The invention relates to a simulation test device for co-injection delamination exploitation in an oil field, in particular to a simulation test device for intra-layer heterogeneous model water flooding. Background technique [0002] In oil field development, oil layer heterogeneity is one of the important factors affecting oil field development, especially in the case of combined oil layer water injection, oil layer heterogeneity not only reduces the thickness of the oil layer, but also affects the The oil displacement efficiency of the oil layer has a greater impact and reduces the ultimate recovery factor. Therefore, understanding the change law of displacement efficiency in heterogeneous reservoirs during water flooding can provide a theoretical basis for adjusting development measures and improving development effects. [0003] At present, the research on heterogeneity can be divided into intralayer heterogeneity research and interlayer heterogen...
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