Oil-water displacement efficiency experimental method of longitudinal and planar nonhomogeneous slab models
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An experimental method and heterogeneous technology, applied in the direction of earthwork drilling, production fluid, wellbore/well components, etc., can solve problems such as injection-production well patterns
Inactive Publication Date: 2010-08-04
SOUTHWEST PETROLEUM UNIV
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For some reservoirs with strong heterogeneity, horizontal and vertical heterogeneous water flooding experimental research is required. Currently, the known experimental research on heterogeneous displacement mainly includes: multiple small core combinations to study vertical heterogeneity , research on longitudinal heterogeneity of multiple long core combinations, longitudinal heterogeneity of flat plate models, and planar heterogeneity of flat plate models under low temperature and low pressure, but cannot carry out planar heterogeneity under high temperature and high pressure and different injection-production well patterns Displacement Experimental Research
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Embodiment 1
[0036] Embodiment one: if figure 1 , figure 2 , image 3 As shown, the vertical heterogeneous water flooding experiment of the present invention adopts the following process steps:
[0037] 1. If figure 2 As shown, the longitudinal heterogeneous three-layer slab model with the specification of 300mm×300mm×180mm is loaded into the multi-layer slab model core holder 1 specially made for it. Among them, the measured permeability of high, medium and low permeability layers are 1010.6mD, 501.01mD, 97.1mD respectively; the porosity of high, medium and low permeability layers are 32.2%, 26.4%, 21.6% respectively.
[0038] 2. Turn on the confining pressure pump 4, and increase the confining pressure to 20MPa for the multi-layer flat model core holder 1;
[0039] 3. vacuumize the multi-layer flat model rock core holder 1 equipped with the three-layer flat model;
[0040] 4. Then inject the simulated formation water-saturated core, open the constant temperature box 2 to heat the ...
example 2
[0047]Example two: the plane heterogeneous water flooding experiment of the present invention adopts the following process steps:
[0048] 1. Connect the constant pressure, constant speed displacement pump 3 and the piston container 6 to the plane heterogeneous injection system 13;
[0049] 2. If image 3 As shown, a planar heterogeneous slab model with a specification of 300mm×300mm×60mm is loaded into a multi-layer slab model core holder 1 specially made for it. The permeability of the high-permeability zone, medium-permeability zone, and low-permeability zone of the planar heterogeneous plate model is 1010.6mD, 501.01mD, and 97.1mD respectively; the porosity of the high-permeability zone, medium-permeability zone, and low-permeability zone are 32.2% and 26.4% respectively , 21.6%. The average porosity of the planar heterogeneous plate model is determined to be 25.68%.
[0050] 3. Turn on the confining pressure pump 4, and increase the confining pressure to 20MPa for the ...
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Abstract
The invention relates to an oil-water displacement efficiency experimental method of longitudinal and planar nonhomogeneous slab models, which comprises an oil-water displacement efficiency experimental method of a longitudinal nonhomogeneous slab model and an oil-water displacement efficiency experimental method of a planar nonhomogeneous slab model. The experimental method mainly comprises the following steps: 1. applying confining pressure to the core holder of a multilayer slab model, then vacuumizing the multilayer slab model with three layers slab model, injecting simulated formation water to saturate cores, and then heating; 2. injecting simulate formation oil in a piston type container into the core holder of the multilayer slab model, and carrying out water-oil displacement to establish bound water saturation level; and 3. injecting simulate formation water in the piston type container into the core holder of the multilayer slab model, and carrying out water-oil displacement to obtain accumulated displacement oil output and wateryield under different water injection multiples, and thereby, the oil displacement efficiency is obtained. The invention not only can carry out displacement experiment research on the longitudinal nonhomogeneous slab model at high temperature and pressure but also can carry out displacement experiment research of different flooding well networks on the planar nonhomogeneous slab model under high temperature and pressure. The highest pressure reached by the experimental method is 25MPa, and the highest temperature reached by the experimental method is 100 DEG C.
Description
technical field [0001] The invention relates to an experimental method for water displacement oil efficiency of vertical and plane heterogeneous flat plate models, especially for indoor high temperature and high pressure vertical heterogeneous (reservoirs with different sedimentary structure) flat plate models and different injection-production wells under high temperature and high pressure in the petroleum industry Experimental study on water flooding efficiency of planar heterogeneous (different sedimentary facies zones) plate model of mesh. Background technique [0002] The experimental research on water flooding oil efficiency is an important laboratory experimental research to guide the development of water flooding reservoirs, formulate the direction of measures to enhance oil recovery of water flooding reservoirs, and improve the effect of oilfield development. [0003] At present, the well-known displacement experiment methods mainly include: small core displacement ...
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