An indoor experimental method and device for simulating gravity differentiation of cohesive flooding in reservoirs
A technology of gravity differentiation and reservoir simulation, applied in the direction of material resistance, can solve the problems of inability to effectively simulate the gravity differentiation of polymer flooding in oil layers, and achieve the effect of authentic and reliable experimental data, accurate and convincing experimental results
Inactive Publication Date: 2015-07-29
NORTHEAST GASOLINEEUM UNIV
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Problems solved by technology
[0005] In order to solve the technical problems mentioned in the background technology, the present invention provides an indoor experimental method and device capable of simulating the gravitational differentiation of polymer flooding in reservoirs. The charged unit uses the Lorentz force on the core to simulate the gravity, thus effectively solving the problem that the current laboratory experiment cannot effectively simulate the gravity differentiation in the polymer flooding process of the oil layer
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preparation example Construction
[0058]In the preparation of the magnetic auxiliary agent described in the implementation step (4), the preparation of the charged silica nanoparticles is carried out in the following manner:
[0059] Firstly, three kinds of reagents, tetraethyl orthosilicate (TEOS), cetyltrimethylammonium chloride (CTAC), triethanolamine (TEA) and water (H 2 O) By TEOS:CTAC:TEA:H 2 The mass ratio of O=0.71:0.14:7.33:91.82 was prepared into a mixed solution, and then the mixed solution of APTMES (medicine produced by Acros Company, no Chinese name) and tetraethyl orthosilicate (TEOS) was added and stirred together, then ethanol was added and Centrifuge to wash off the template molecule cetyltrimethylammonium chloride (CTAC) in the particles, wash with ethanol after centrifugation, wash off cetyltrimethylammonium chloride (CTAC), repeat the steps 3 times Porous silica nanoparticles with amino groups on the surface (NH 2 -MSN), then NH 2 -MSN is added to the dimethylformamide solution containi...
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Abstract
An indoor experimental method and device for simulating gravity differentiation of cohesive flooding in reservoirs. The main purpose is to provide an experimental device and method that can effectively simulate the gravity differentiation in the oil layer polymer flooding process indoors. It is characterized in that: the device is composed of a gravity differentiation simulator, a first glass clamping cylinder, a second glass clamping cylinder, a resistance tester and a computer; this method makes the charged unit closely connect with the polymer surface functional group, when driving When the replacement fluid moves along the main flow direction in the core located in the corresponding gravity differentiation simulator, it is subjected to the downward Lorentz force due to the vertical magnetic field existing in the gravity differentiation simulator. The magnetic force is used to simulate the gravity effect, so that the gravity effect can be effectively simulated in a very thin core, and the gravity differentiation effect under different reservoir conditions can be simulated by adjusting the strength of the magnetic field to control the magnetic force.
Description
technical field [0001] The invention relates to an experimental method and device for simulating on-site oil displacement in an indoor physical experiment, and in particular to an experimental method and device for simulating the effect of oil layer gravity differentiation in polymer flooding. Background technique [0002] The actual reservoir is a three-dimensional pore body, and the corresponding actual displacement process is also a three-dimensional displacement process. Therefore, the influence of gravity during the oil displacement process cannot be ignored. Especially obvious. [0003] As early as 1933, R.D. Wyckoff and others raised the issue of the effect of gravity on water flooding. In Daqing Oilfield, problems such as water seeping at the bottom of thick oil layers exposed during actual production and water flooding thickness are small are all related to the influence of gravity. In the paper, it was thought that the gravity gradient for oil-water gravity sepa...
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IPC IPC(8): G01N27/04
Inventor 皮彦夫刘丽柏明星陈楠李泉志龚亚
Owner NORTHEAST GASOLINEEUM UNIV