CN101699282B - Device for measuring acid/rock reaction dynamics parameters of acid liquid systems with different viscosities - Google Patents

Device for measuring acid/rock reaction dynamics parameters of acid liquid systems with different viscosities Download PDF

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Publication number
CN101699282B
CN101699282B CN2009100588987A CN200910058898A CN101699282B CN 101699282 B CN101699282 B CN 101699282B CN 2009100588987 A CN2009100588987 A CN 2009100588987A CN 200910058898 A CN200910058898 A CN 200910058898A CN 101699282 B CN101699282 B CN 101699282B
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China
Prior art keywords
acid
kettle
rock
acid solution
different viscosities
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CN2009100588987A
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Chinese (zh)
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CN101699282A (en
Inventor
伊向艺
卢渊
李沁
张哨楠
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伊向艺
卢渊
李沁
张哨楠
成都理工大学
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Priority to CN2009100588987A priority Critical patent/CN101699282B/en
Publication of CN101699282A publication Critical patent/CN101699282A/en
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Abstract

The invention discloses a device for measuring acid/rock reaction dynamics parameters of acid liquid systems with different viscosities, which is used in acid fracturing modification techniques of carbonate reservoir in the field of petroleum engineering, is suitable for measuring the acid/rock reaction dynamics parameters of liquid systems with different viscosities and acid liquid concentrations, and more precisely simulates the real flow direction and characteristics of acid liquid. The device comprises a main body consisting of a reaction kettle and two sets of different models of clamp holders, and also comprises power units for providing power for the kettle to rotate, and simple measuring units. The main body is formed by forging a Hastelloy alloy material, and the system bears pressure of 20 MPa and resists temperature of 150DEG C. In an experiment, liquid in the reaction kettle is stirred, acid liquid flows along the wall of the kettle body and undergoes acid/rock reaction with the surface of batholiths fixed by the clamp holders on two sides of the kettle body; and a sample can be taken through a plug position of a clamp holder on the other side of the kettle body or a pressure relief port on the lower part of the kettle body, ion concentration of the acid liquid is analyzed, and the acid/rock reaction dynamics parameters are measured.

Description

Different viscosities acid fluid system acid rock reaction dynamics parametric measurement device
Technical field
The invention belongs to the petroleum engineering field, be used for the mensuration of the sour rock reaction dynamics parameter of carbonatite oil and gas reservoir acid fracturing renovation technique.
Technical background
The experiment of tradition rotation laccolite is widely used in measures sour rock reaction dynamics parameter, like reaction activity, H +Effectively mass transfer coefficient, the order of reaction, rate constant etc., but the bearing of trend, rock deposition direction, the variation of acid fluid system viscosity etc. of not considering formation fracture are to measuring the influence of sour rock response parameter.The present invention adapts to the mensuration of the sour rock reaction dynamics parameter of different viscosities and acid strength liquid system, has simulated true flow direction and the characteristic of acid solution in the crack more accurately.
Summary of the invention
The objective of the invention is to simulate the different viscosities acid fluid system at the formation fracture flow process, measure this process acid rock reaction dynamics parameter simultaneously.
Device constitutes main part by the clamper of an agitated reactor and two cover different models, comprises that also a cover makes the liquid generation is at the uniform velocity rotated in the kettle propulsion system and some simple measurement mechanisms.
The apparatus main body part: agitated reactor both sides are connected with two cover core holding units, and a cover is that diameter is the core holding unit of 25.4 millimeters (simulations 1 " scar), and another set of is that diameter is the core holding unit of 50.8 millimeters (simulations 2 " scar).Agitated reactor and core holding unit adopt whole Hastelloy to forge and form, and can hold the corrosion of anti-strong acid, and kettle adopts with the core holding unit interface of both sides and is threaded; Loam cake is established puddler and can be linked to each other with propulsion system, and liquid is rotated with different in flow rate in kettle, and loam cake and kettle adopt the fast-open type clamp connection; Easy accessibility; And system's pressure-bearing can reach 20 MPas, and heatproof to 150 degree centigrade is safe and reliable.
The object of the invention is realized by following technical measures:
1. principle of work
This experimental provision under design temperature pressure by motor drives agitator arm and rotor; Stir the inner liquid of agitated reactor; Acid solution is crossed with the fixing laccolite surface of kettle sandwich device along the kettle wall flow sour rock reaction is taken place; From the plug of kettle opposite side clamper or the relief port of kettle bottom, the ion concentration analysis that can take a sample and carry out acid solution, assaying reaction kinetic parameter.
2. simulating actual crack truly flows
Near the rotation of liquid disc surfaces flowed different in this experimental provision and the traditional sour rock reaction dynamics determinator; Because its rock core is in the clamper of kettle both sides; And the scar that contacts with acid solution is fixed on the internal face of the inner both sides of kettle, when acid solution is stirred in kettle and when at the uniform velocity rotating, acid solution is crossed scar with parallel-flow; Therefore acid solution moving phase has had directivity for scar; The present invention makes acid solution flow along the bearing of trend in true crack just in line with the simulation acid fracturing true mobility status of acid solution in when construction, and the direction when therefore in experiment, scar being got core by it is placed in the clamper (has special demands) during the processing scar; Sour rock in the simulated formation reacts and measures kinetic parameter more realistically, like reaction activity, H +Effective mass transfer coefficient, the order of reaction, rate constant etc.
3. the sour rock reaction of simulation different viscosities acid fluid system
The acid fluid system of traditional rotation laccolite experiment test can only be to the liquid system that viscosity is less, the ions diffusion resistance is little.During and liquid that hydrogen ion diffusional resistance big higher when tested viscosity, even the liquid at kettle edge does not reach disturbed flow condition yet when the laccolite high speed rotating, make that the acid solution pH is inhomogeneous in the kettle, sampling must cause the result inaccurate in kettle edge.This experimental provision is to drive the acid solution rotation with stirrer; Therefore the acid solution of any viscosity of test can let the liquid in the entire reaction still reach turbulent simultaneously in agitated reactor; And the rotor that designs 3 different-diameters is big or small to regulate rotor and inner wall of kettle spacing; Can simulate the flow performance of acid solution in different fracture widths gap, can also can take a sample from any side-draw appearance of sandwich device when taking a sample simultaneously from the release interface of kettle downside; Guaranteed that each ion concentration of acid solution that sour appearance and scar in the agitated reactor react is even, and accuracy is higher.
Description of drawings
Below in conjunction with accompanying drawing the present invention is further specified.
Accompanying drawing is a structure drawing of device of the present invention.
1. stirrers among the figure, 2. fast-open type clip, 3.25.4 millimeter core holding unit, 4. plug, 5. agitated reactor, 6. release interface, 7. stirring rotator, 8. plug, 9.50.8 millimeter core holding unit, 10. puddler.
Embodiment
Through concrete experimental procedure, the present invention is carried out detailed description below.Experimentation is following:
1. first associated line and each parts, pressure testing then confirms that work system is normal;
2. the rock core that will test usefulness is packed in the clamper; Scar direction when noting processing scar direction and getting core is consistent; If only make a size rock sample, then opposite side uses cushion block and extremely blocks, in order to avoid leak acid; The throttling valve that has aperture also can be housed so that take a sample, and guarantee that as far as possible inside does not have air;
3. after connecting clamper, agitated reactor is heated to formation temperature, add the good acid solution of preheating;
4. clamper is progressively added ring and press, simultaneously to the agitated reactor pressurization, retaining ring is pressed and is higher than 2 to 3 MPas of still internal pressure all the time.Start motor simultaneously and make its slow rotation, regulate rotating speed to preset rotation speed;
When system stability when preset pressure, temperature and the rotating speed, in the time interval that GB requires, slowly open outlet of clamper plug or the throttling valve sampling that does not add rock core or open release outlet sampling;
The analytical test of concrete acid appearance is identical with the experiment of tradition rotation laccolite.

Claims (6)

1. different viscosities acid fluid system acid rock reaction dynamics parametric measurement device; Device constitutes propulsion system and the measurement mechanism that the liquid generation is at the uniform velocity rotated in the kettle by core holding unit, a cover of an agitated reactor and both sides different model; In experimentation; Acid solution makes it along the laccolite surface that the kettle wall flow is crossed in the kettle sandwich device sour rock reaction take place in stirring and the revolving reaction still; The analysis of acid solution ion concentration is carried out in clamper plug place through not adding rock core or the sampling of the relief port of agitated reactor bottom, measures sour rock reaction dynamics parameter.
2. different viscosities acid fluid system acid rock reaction dynamics parametric measurement device according to claim 1; It is characterized in that: the rotation acid solution makes its parallel-flow cross rock surface; The reaction of sour rock takes place, during the construction of simulation acid fracturing acid solution along the stratum the real flow direction of man-made fracture.
3. different viscosities acid fluid system acid rock reaction dynamics parametric measurement device according to claim 1 is characterized in that: in experimentation, make its rotation through the acid solution of stirring in the agitated reactor, make the interior ion concentration of different viscosities acid solution even.
4. different viscosities acid fluid system acid rock reaction dynamics parametric measurement device according to claim 1 is characterized in that: regulate the slewing rate of stirrer, control the speed of rotation of acid solution in kettle, acid solution different flows speed in the simulated formation.
5. different viscosities acid fluid system according to claim 1 acid rock reaction dynamics parametric measurement device is characterized in that: scar direction in the adjustment clamper, simulate acid solution on the stratum reaction rate when different directions flows.
6. different viscosities acid fluid system acid rock reaction dynamics parametric measurement device according to claim 1; It is characterized in that: the clamper of two different models is with the kettle both sides that are threaded in agitated reactor; Be used for the laccolite face be fixed on liquid is stirred and during rotation parallel-flow cross scar, loam cake is established puddler and is linked to each other with propulsion system, loam cake and the clamp connection of kettle employing fast-open type; The whole Hastelloy that adopts of device forges; Anti-strong acid corrosion, and pressure-bearing reaches 20 MPas, heatproof to 150 degree centigrade.
CN2009100588987A 2009-04-10 2009-04-10 Device for measuring acid/rock reaction dynamics parameters of acid liquid systems with different viscosities CN101699282B (en)

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CN101699282B true CN101699282B (en) 2012-08-08

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CN101864949B (en) * 2010-06-18 2011-08-10 西南石油大学 Test device and method for simulating acid etching crack flow guide capability
CN102587886A (en) * 2012-03-20 2012-07-18 西南石油大学 Testing device and testing method for flow conductivity of acid-eroded fractures
CN102879546B (en) * 2012-09-25 2014-08-06 成都理工大学 Method for testing acidic rock reaction dynamic parameters for simulating flat-plate flow
CN102928366A (en) * 2012-10-29 2013-02-13 西南石油大学 Ion concentration change-based acidic rock reaction rate determination method
CN104007232B (en) * 2014-05-13 2016-03-16 中国石油化工股份有限公司 A kind of acid-rock reaction kinetic parameter experimental provision of automatic control
CN104316650B (en) * 2014-10-20 2016-03-09 中国石油天然气股份有限公司 High Temperature High Pressure dynamic acid-rock reaction quick experiment device and method
CN104763399A (en) * 2015-02-28 2015-07-08 董晓军 Device and method for testing effective mass transfer coefficient of hydrogen ions in acid fracturing
CN109001079A (en) * 2017-06-06 2018-12-14 中国石油天然气股份有限公司 A kind of self-diverting acid becomes sticky characteristic measurement system and method
CN108226005A (en) * 2017-12-26 2018-06-29 中国石油天然气股份有限公司 A kind of evaluation method of acid solution deep penetration low damage energy

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