CN102169081B - Heterogeneous multi-layer core holding unit - Google Patents

Heterogeneous multi-layer core holding unit Download PDF

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Publication number
CN102169081B
CN102169081B CN201010610694A CN201010610694A CN102169081B CN 102169081 B CN102169081 B CN 102169081B CN 201010610694 A CN201010610694 A CN 201010610694A CN 201010610694 A CN201010610694 A CN 201010610694A CN 102169081 B CN102169081 B CN 102169081B
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China
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rock core
core
fixed muffle
rubber tube
shell
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CN102169081A (en
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张祖波
罗蔓莉
吕伟峰
刘庆杰
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Petrochina Co Ltd
China Petroleum and Natural Gas Co Ltd
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China Petroleum and Natural Gas Co Ltd
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Abstract

The invention discloses a heterogeneous multi-layer core holding unit. A rubber barrel is arranged in a shell; a multi-layer core model is positioned in the inner cavity of the rubber barrel; a left core piercing head and a right core piercing head are pressed against the two ends of the multi-layer core model; a core chamber for accommodating the multi-layer core model is formed among the inner wall of the rubber barrel, the left core piercing head and the right core piercing head; a left fixing sleeve and a right fixing sleeve are sleeved on the left core piercing head and the right core piercing head respectively; the peripheries of the left fixing sleeve and the right fixing sleeve are connected with the two ends of the shell through an axial confining pressure sealing ring; an enclosed annular confining pressure space is formed among the outer wall of the rubber barrel, the left fixing sleeve, the right fixing sleeve and the inner wall of the shell; a liquid inlet is formed in the left core piercing head and is communicated with the core chamber; and a liquid outlet is formed in the right core piercing head and is communicated with the core chamber. By adopting the holding unit, laminational measurement of intraformational heterogeneous oil deposit is realized, and the change rule and intraformational channeling phenomenon of intraformational heterogeneous water displacing oil during mixed water injection delamination can be accurately simulated and tested.

Description

The heterogeneous body multiple-lay core gripper
Technical field
The present invention relates to a kind of simulation oil field and close notes separate zone production test unit, be specifically related to a kind of heterogeneous body multiple-lay core gripper.
Background technology
In oil-field development; Reservoir heterogeneity is one of key factor that influences oil-field development; Especially merge under the situation of water filling at oil reservoir; Reservoir heterogeneity not only makes the core intersection sweep efficiency reduce, and the oil displacement efficiency of each oil reservoir in the water filling series of strata is produced bigger influence, reduces ultimate recovery factor.Therefore, understand the Changing Pattern of non-homogeneous pay oil displacement efficiency in the injecting process, theoretical foundation is provided for adjustment exploitation measure, raising development effectiveness.
About heterogeneous research, be divided in the layer and study with the interlayer heterogeneous body at present, the heterogeneous research method of interlayer is simple, adopts a plurality of parallelly connected rock cores more, and clamper is simple relatively with metering.Research about in-layer heterogeneity is fewer, present method be with synthetic core be pressed into a multilayered model with epoxy gluing as heterogeneous body system in the simulation layer.Another kind method is to be pressed into a multilayered model with synthetic core, in core holding unit, carries out displacement test, with the displacement of reservoir oil rule of heterogeneous body system in the research layer.Its shortcoming is that existing core holding unit has an inlet and a liquid outlet, can only measure the variation of the whole oil displacement efficiency of multilayer rock core model in the injecting process, and can't realize stratified stoichiometric, can not observe the layer cross flow phenomenon.And can only measure factor of porosity, permeability and the oil saturation of The model, can't measure the parameter of each pervious course.Thereby can't realize closing the evaluation of annotating each oil reservoir oil displacement efficiency in the separate zone production.Can not simulate burden pressure with epoxy gluing as heterogeneous body system in the simulation layer in addition, these all are the technical matterss that needs to be resolved hurrily in heterogeneous research in the layer.
Summary of the invention
The purpose of this invention is to provide a kind of core holding unit that can accurately measure water displacing oil Changing Pattern in the heterosphere.
For realizing above-mentioned purpose, technical scheme of the present invention is following:
Heterogeneous body multiple-lay core gripper of the present invention, by shell, rubber tube, top, a rock core left side, the right top of rock core, left fixed muffle, right fixed muffle, left fastening sleeve, right fastening sleeve and fixed support constitute;
Stainless steel casing is cylindric, and rubber tube places enclosure, with the shell concentric; Multilayer rock core model is arranged in the rubber tube internal cavity; Top, a rock core left side; The right top of rock core is removably replaced in rubber tube, the two ends of multilayer rock core model; Its shape and size conform to the rubber tube inwall, form the rock core room that holds multilayer rock core model between the inwall of rubber tube and top, a rock core left side and the right top of rock core; Left side fixed muffle and right fixed muffle are set in respectively on the right top of top, a rock core left side and rock core, and left fixed muffle is connected through axial confined pressure O-ring seal with the shell two ends with right fixed muffle periphery; The rubber tube outer wall forms an airtight annular confined pressure space between left fixed muffle and right fixed muffle and the outer casing inner wall; Fastening sleeve in a left side and right fastening sleeve are set in respectively on top, a rock core left side and the right top of rock core, are positioned at left fixed muffle and the right fixed muffle outside; Shell is provided with confined pressure interface, confined pressure vent port; Be provided with inlet in the top, a rock core left side and be communicated with the rock core room, be provided with the rock core vent port and be communicated with the rock core room; Rock core is provided with middle level liquid outlet, upper strata liquid outlet, lower floor's liquid outlet in the right top; Be communicated with the rock core room; Each liquid outlet is aimed at one deck rock core model respectively; At the seam crossing between corresponding adjacent two layers rock core model on the right top of rock core bar shaped liquid outlet sealing gasket is set, so that flow out from the corresponding liquid outlet of each layer through the effluent of every layer of rock core model; Fixed support is positioned at the shell below.
This multilayer rock core model is combined by a plurality of natural or artificial individual layer rock cores with different permeabilities.
Aforesaid heterogeneous body multiple-lay core gripper, wherein, each individual layer rock core can be the identical rectangular parallelepiped rock core of shape.
Aforesaid heterogeneous body multiple-lay core gripper, wherein, this rubber tube outside can be cube, and inside has the rectangular parallelepiped cavity to hold the rectangular parallelepiped rock core, and its two ends have circular interface.
Described heterogeneous body multiple-lay core gripper is provided with the film of isolating profit on the adjacent two layers rock core surface of contact of its multilayer rock core model.
Like described heterogeneous body multiple-lay core gripper, it is characterized in that described multilayer rock core model can use individual layer homogeneous rock core to substitute.
Aforesaid non-homogeneous model pilot system, wherein, this individual layer rock core is cylindrical or rectangle.
Beneficial effect of the present invention is that (1) this core holding unit can adopt natural reservoir cores and apply confined pressure, has simulated the actual conditions of heterogeneous reservoir in the layer truly; (2) this core holding unit can make the liquid of each rock core layer of flowing through flow out from different outlets respectively through unique top design, has realized the layering measurement, can accurately reflect and close the Changing Pattern of annotating heterogeneous body water displacing oil in the separate zone production middle level; (3) to have improved the bonding rock core of multilayer of non-homogeneous model in the tradition stratum be the independent assortment single-layer model to this core holding unit, and each individual layer parameter can obtain separately, and can flexible combination simulating multiple heterogeneous reservoir; (4) this core holding unit is changed into cube with the cylindric outer shape of tradition stratum rubber tube, and has reduced the thickness of barrel, more helps the rubber tube internal cavities is applied confined pressure; (5) can be used in of this core holding unit measured non-homogeneous model in the layer; Simultaneously, only need the film of isolating profit is set between adjacent multilayer rock core model, can be used for measuring the interlayer non-homogeneous model, simplified the proving installation of a plurality of core holding unit parallel connections in the conventional method.
Description of drawings
Fig. 1 is the structural representation of heterogeneous body multiple-lay core gripper;
Fig. 2 is the cut-open view of A-A ' among Fig. 1;
Fig. 3 is the cut-open view of B-B ' among Fig. 1;
Wherein: 1; Rock core vent port 2; Top, a rock core left side 3; The fastening sleeve 4 in a left side; Axial confined pressure O-ring seal 5; Inlet 6; Left side fixed muffle 7; Shell 8; Rubber tube 9; Confined pressure vent port 10; Multilayer rock core model 11; Fixed support 12; Annular confined pressure space 13; Confined pressure interface 14; Right fixed muffle 15; The right top 16 of rock core; Middle level liquid outlet 17; Upper strata liquid outlet 18; Liquid outlet sealing gasket 19; Right fastening sleeve 20; Lower floor's liquid outlet
Embodiment
The heterogeneous body multiple-lay core gripper
Be used for the heterogeneous body multiple-lay core gripper by shell 7, rubber tube 8, rock core left side top 2, the right top 15 of rock core, left fixed muffle 6, right fixed muffle 14, left fastening sleeve 3, right fastening sleeve 19 and fixed support 11 constitute;
Stainless steel casing 7 is cylindric, and rubber tube 8 places shell 7 inside, with shell 7 concentrics; Multilayer rock core model 10 is arranged in rubber tube 8 internal cavities; Top, a rock core left side 2; The right top 15 of rock core is removably replaced in rubber tube 8, the two ends of multilayer rock core model 10; Its shape and size conform to rubber tube 8 inwalls, form the rock core room that holds multilayer rock core model 10 between the inwall of rubber tube 8 and top 2, a rock core left side and the right top 15 of rock core; Left side fixed muffle 6 and right fixed muffle 14 are set in respectively on the right top 15 of top 2, a rock core left side and rock core, and left fixed muffle 6 is connected through axial confined pressure O-ring seal 4 with shell 7 two ends with right fixed muffle 14 peripheries; Rubber tube 8 outer walls form an airtight annular confined pressure space 12 between left fixed muffle 6 and right fixed muffle 14 and shell 7 inwalls; The fastening sleeve 3 in a left side is set in respectively on top 2, a rock core left side and the right top 15 of rock core with right fastening sleeve 19, is positioned at the left fixed muffle 6 and right fixed muffle 14 outsides; Shell 7 is provided with confined pressure interface 13, confined pressure vent port 9 and annular confined pressure space 12 and system connectivity; Be provided with inlet 5 in the top, a rock core left side 2 and be communicated with displacement system and rock core room, be provided with rock core vent port 1 and be communicated with rock core room and ambient atmosphere; Rock core is provided with middle level liquid outlet 16, upper strata liquid outlet 17, lower floor's liquid outlet 20 in the right top 15; Be communicated with rock core room and metering system; Each liquid outlet is aimed at one deck rock core model respectively; At the seam crossing between corresponding adjacent two layers rock core model on the right top 15 of rock core bar shaped liquid outlet sealing gasket 18 is set, so that flow out from the corresponding liquid outlet of each layer through the effluent of every layer of rock core model; Fixed support 11 is positioned at shell 7 belows.
Non-homogeneous model oil-water displacement efficiency evaluation experimental
At first get a plurality of natural reservoir cores that pick up from different depth, process the individual layer rock core model of same size.Measure the factor of porosity and the air permeability of each individual layer rock core model respectively; With the saturated local water of each individual layer rock core, measure water phase permeability respectively; Respectively each individual layer rock core is carried out oily expelling water subsequently, reach the irreducible water saturation of measuring the effective permeability of oil phase behind the irreducible water state and calculating each individual layer rock core.Each layer rock core that will contain irreducible water arranged the rock core room of putting into the heterogeneous body multiple-lay core gripper according to the anti-rhythm; Fixedly upper and lower top of the rock core of core holding unit and upper and lower fixed muffle.The confined pressure interface is connected on the confined pressure pump, starts the confined pressure pump and add confined pressure 0~50MPa.With the speed of 0~10ml/min rock core is carried out the water displacing oil operation, the displacement pressure reduction at the cumulative oil production when writing down every layer water breakthrough time, water breakthrough, cumulative liquid production, rock core two ends.Composite water cut reaches at 99.95% o'clock and finishes experiment.Draw rock core model WATER FLOODING CHARACTERISTIC CURVE according to record data, and calculate the coefficient of variation, the coefficient of advancing by leaps and bounds, permeability grade and oil displacement efficiency.

Claims (3)

1. a heterogeneous body multiple-lay core gripper is made up of shell, rubber tube, top, a rock core left side, the right top of rock core, left fixed muffle, right fixed muffle, left fastening sleeve, right fastening sleeve and fixed support; It is characterized in that:
Stainless steel casing is cylindric, and rubber tube places enclosure, with the shell concentric; Multilayer rock core model is arranged in the rubber tube internal cavity; Top, a rock core left side; The right top of rock core is removably replaced in rubber tube, the two ends of multilayer rock core model; Its shape and size conform to the rubber tube inwall, form the rock core room that holds multilayer rock core model between the inwall of rubber tube and top, a rock core left side and the right top of rock core; Left side fixed muffle and right fixed muffle are set in respectively on the right top of top, a rock core left side and rock core, and left fixed muffle is connected through axial confined pressure O-ring seal with the shell two ends with right fixed muffle periphery; The rubber tube outer wall forms an airtight annular confined pressure space between left fixed muffle and right fixed muffle and the outer casing inner wall; Fastening sleeve in a left side and right fastening sleeve are set in respectively on top, a rock core left side and the right top of rock core, are positioned at left fixed muffle and the right fixed muffle outside; Shell is provided with confined pressure interface, confined pressure vent port; Be provided with inlet in the top, a rock core left side and be communicated with the rock core room, be provided with the rock core vent port and be communicated with the rock core room; Rock core is provided with middle level liquid outlet, upper strata liquid outlet, lower floor's liquid outlet in the right top; Be communicated with the rock core room; Each liquid outlet is aimed at one deck rock core model respectively; At the seam crossing between corresponding adjacent two layers rock core model on the right top of rock core bar shaped liquid outlet sealing gasket is set, so that flow out from the corresponding liquid outlet of each layer through the effluent of every layer of rock core model; Fixed support is positioned at the shell below.
2. heterogeneous body multiple-lay core gripper according to claim 1 is characterized in that, said rubber tube outside is a cube, and inside has the rectangular parallelepiped cavity, and its two ends have circular interface.
3. heterogeneous body multiple-lay core gripper according to claim 1 is characterized in that: the film of isolating profit is set on the adjacent two layers rock core surface of contact of described multilayer rock core model.
CN201010610694A 2010-12-17 2010-12-17 Heterogeneous multi-layer core holding unit Active CN102169081B (en)

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CN102707032B (en) * 2012-05-17 2015-02-25 中国石油天然气股份有限公司 Three-axial rock core holding unit
DE102012012589A1 (en) 2012-06-19 2013-12-19 Technische Universität Bergakademie Freiberg Core holder for characteristic analysis of test specimens, has feedthrough that is formed on front side arranged cover element, through which fluid is introduced under pressure in cavity from axial direction
CN103352695B (en) * 2013-07-10 2015-04-08 中国石油大学(北京) Visualization physical simulation device with consideration of interlamination fluid channeling
CN103558358B (en) * 2013-09-04 2015-05-06 中国石油天然气股份有限公司 Intraformational heterogeneous model interlayer crack effect detection method and system thereof
CN103869054B (en) * 2014-03-25 2017-01-04 安徽理工大学 Grouting test device with pressure and test method for rock sample
CN104727814B (en) * 2015-02-14 2016-10-05 东北石油大学 A kind of heterogeneous artificial cores
CN106640048B (en) * 2016-09-13 2020-03-24 东北石油大学 Pressure determination equipment and method for indoor constant-pressure chemical flooding oil displacement experiment
CN108318398B (en) * 2018-01-08 2020-06-09 中国石油天然气股份有限公司 Experimental method for high-temperature high-pressure oil displacement efficiency of heavy oil reservoir
CN108562617B (en) * 2018-03-14 2020-10-13 中国石油天然气集团有限公司 Device and system for measuring core electrokinetic response characteristics
CN110905496B (en) * 2019-12-09 2021-12-17 中国石油大学(北京) Gas drive overlap simulation device and use method thereof
CN111413483A (en) * 2019-12-16 2020-07-14 大庆油田有限责任公司 Mechanical pressurization type square rock core holder

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CN201555791U (en) * 2009-11-30 2010-08-18 西南石油大学 Multilayer flat plate module rock core clamper

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CN2189744Y (en) * 1993-11-22 1995-02-15 石油大学(华东) Holder of unhomogeneous drill core
CN2507005Y (en) * 2001-03-12 2002-08-21 石油大学(华东)石仪科技实业发展公司 Radial multi-layer rock core holder
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