An experimental method for imbibition recovery in low-permeability fractured reservoirs
An experimental method and imbibition technology, applied in measuring devices, instruments, scientific instruments, etc., can solve problems such as difficulty in accurately reflecting influence, and achieve easy control of fracture shape and geometric size, excellent core repeatability, and good position repeatability. Effect
Inactive Publication Date: 2016-08-24
NORTHEAST GASOLINEEUM UNIV
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Problems solved by technology
[0003] The present invention overcomes the problem that the existing dynamic imbibition experimental research method in the background technology is difficult to accurately reflect the influence of various factors in the experiment on the dynamic imbibition recovery process, and provides a low-permeability fractured reservoir imbibition recovery process experiment method
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[0020] The present invention will be further described below in conjunction with accompanying drawing:
[0021] The experimental method of the process of imbibition recovery in low-permeability fractured reservoirs comprises the following steps:
[0022] (1) Mold: the mold is composed of side plates, end plates, base plates and pressing plates to form a square mold. The square mold is equipped with two relative side plates and end plates around the top of the base plate, and two relative side plates and end plate tops There are pressure plates; the side plates and end plates are made of steel, the bottom plate is bakelite, the pressure plate is high-density board, and the two side plates are connected by bolts; the geometric dimensions of the square steel mold: length × width × height = 32cm × 32cm × 10cm;
[0023] (2) Ingredients: After the core matrix permeability is determined to be 2mD, the proportions of the amount of quartz sand and cement are determined to be 87% and 1...
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Abstract
The invention relates to a hypotonic fractured reservoir imbibition oil-extraction experimental method. The problem that an existing dynamic imbibition oil-extraction research method is hard to accurately reflect the influence of each factor to the dynamic imbibition oil-extraction process in an experiment is mainly solved. The method is characterized by comprising the following steps: (1) preparing a mold, (2) burdening, (3) mixing sand, (4) primarily assembling a mold and pressurizing, (5) spreading a parchment paper interlayer, (6) secondarily assembling the mold and pressurizing, (7) warming, (8) taking out a core, (9) pumping vacuum saturated water, (10) saturating in-place oil, and (11) performing a dynamic imbibition experiment, namely taking out a rock core, removing a plastic film in the middle of the rock core and a wound adhesive tape, sealing a circular-arc surface and two end surfaces of the rock core again, and injecting water and an oil-displacing agent to pass through the rock core through a crack, so that the fractured reservoir imbibition oil-extraction process is simulated by using the method. The hypotonic fractured reservoir imbibition oil-extraction experimental method is capable of guaranteeing that the oil-containing saturation of the matrix rock core cannot be influenced by the crack, the operation steps of the existing experimental method are simplified, and the precision of the dynamic imbibition experiment is improved.
Description
Technical field: [0001] The invention relates to the technical field of oil reservoir development, in particular to an experimental method for imbibition oil recovery in low-permeability fractured oil reservoirs for research on dynamic imbibition oil recovery effects and influencing factors of low-permeability fractured oil reservoirs. Background technique: [0002] In the development of low-permeability fractured reservoirs, the problem of low water flooding recovery caused by serious water flooding of oil wells and rapid rise of water cut often occurs. The current laboratory research and field tests have shown that the cross-seepage flow between the injected water and the matrix rock of the reservoir can be realized through the water injection huff and puff oil recovery technology, thereby reducing the oil saturation of the matrix core and increasing the degree of crude oil recovery. With the deepening understanding of low-permeability fractured reservoirs by oilfield scie...
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IPC IPC(8): G01N33/00
Inventor 谢坤卢祥国周彦霞曹豹
Owner NORTHEAST GASOLINEEUM UNIV
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