CN103940963B - A kind of gel breaker is to the test set of the broken glue performance of filter cake and testing method - Google Patents
A kind of gel breaker is to the test set of the broken glue performance of filter cake and testing method Download PDFInfo
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- CN103940963B CN103940963B CN201410165651.6A CN201410165651A CN103940963B CN 103940963 B CN103940963 B CN 103940963B CN 201410165651 A CN201410165651 A CN 201410165651A CN 103940963 B CN103940963 B CN 103940963B
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Abstract
The present invention discloses a kind of gel breaker to the test set of the broken glue performance of filter cake and testing method. The test set of the broken glue performance of filter cake is comprised pressurizing device (1) by the gel breaker of the present invention, heating unit (5), broken glue test bucket (4), it is arranged in described heating unit (5) removably, it is provided with filter in described broken glue test bucket (4) and loses medium (7), described broken glue test bucket (4) has liquid feeding end (2) and outlet end (9), and described liquid feeding end (2) is connected to described pressurizing device (1); Metering system (10), it is arranged on the lower section of described outlet end (9); And acquisition system (11), it is connected to described metering system (10). The gel breaker of the present invention is simple to the broken glue performance testing device structure of filter cake, good stability and workable, efficiency of measurement and precision height, fill up the deficiency that tradition cannot evaluate the broken glue effect of filter cake, for accurately evaluating formation gel breaker, the broken glue performance of filter cake is provided good technical parameter, strong technical support and theoretical foundation are provided for site work.
Description
Technical field
The present invention relates to a kind of gel breaker to the test set of the broken glue performance of filter cake and testing method.
Background technology
Bore in the process of completion, in order to reduce solid liquid phase to the injury of reservoir, often need at the excellent filter cake of immediate vicinity of wellbore forming property, and before reservoir exploitation, it is necessary to filter cake is removed, recovers reservoir seepage channel, obtain reservoir throughput. The main mode removing filter cake carries out chemical plugging removal operation by adding gel breaker.
At present, the laboratory apparatus that immediate vicinity of wellbore filter cake is removed by lab simulation gel breaker is little, and traditional way combines following two kinds of modes: (1), by measuring gel breaker to the decrease in viscosity rate of drilling and completing fluids, calculates the broken glue time of mud cake; (2) adopt the mode soaking mud cake in gel breaker, observe the removing situation of mud cake. All there is drawback in two kinds of modes, and cannot under accurate simulation field condition: (1) gel breaker under reservoir pressure situation to the removing of mud cake; (2) consecutive variations of fluid loss rate in glue process is broken; (3) the broken glue effect of reservoir is simulated after broken glue.
Therefore, be there is demand to accurately measuring gel breaker under simulation stratum condition by existence in the test set of the broken glue performance of filter cake and testing method.
Summary of the invention
It is an object of the present invention to provide a kind of gel breaker to the test set of the broken glue performance of filter cake.
It is a further object to provide a kind of gel breaker to the testing method of the broken glue performance of filter cake.
In the present invention, term " gel breaker is to the broken glue performance of filter cake " includes but not limited to following parameter: filter loss, broken glue time and broken glue efficiency.
The test set of the broken glue performance of filter cake is comprised by gel breaker of the present invention:
Pressurizing device (1),
Heating unit (5),
Broken glue test bucket (4), it is arranged in described heating unit (5) removably, it is provided with filter in described broken glue test bucket (4) and loses medium (7), described broken glue test bucket (4) has liquid feeding end (2) and outlet end (9), and described liquid feeding end (2) is connected to described pressurizing device (1);
Metering system (10), it is arranged on the lower section of described outlet end (9); And
Acquisition system (11), it is connected to described metering system (10).
The broken glue test bucket adopted in the present invention can test bucket for the broken glue that this area is conventional, as bucket is lost in High Temperature High Pressure filter.
The filter adopted in the present invention lose medium be configured to allow drilling fluid to be tested by and obtain filter cake simultaneously, include but not limited to have the porous emery disc of different rate of permeation, the filter paper of different meshes or quartz sand.
The pressurizing device adopted in the present invention can be the pressurizing device that this area is commonly used, such as high-pressure air source.
The heating unit adopted in the present invention can be the heating unit that this area is commonly used, such as heat cover, baking oven.
Metering system in the present invention for the filter loss of drilling fluid to be measured that measures brokenly in glue test bucket and the filter loss of gel breaker, its metering system that this area can be adopted conventional.
The acquisition system of the present invention is used for gathering in real time filter loss data, its acquisition system that this area can be adopted conventional.
The described gel breaker of the present invention, to the testing method of the broken glue performance of filter cake, comprises the steps:
Adding simulated solution in broken glue test bucket (4), described simulated solution loses medium (7) through filter and discharges described broken glue test bucket (4) afterwards, breaks the simulated solution fluid loss rate V before glue under recording preset temp and pressure1;
After described simulated solution discharges described broken glue test bucket (4), add drilling fluid, described drilling fluid loses medium (7) through described filter, forms filter cake in described filter mistake medium (7), records the filter loss of drilling fluid under preset temp and pressure;
After described broken glue test bucket (4) discharged by described drilling fluid, adding gel breaker, described gel breaker, through described filter mistake medium (7), records the filter loss of gel breaker under preset temp and pressure, time when record filter loss increases suddenly, it is the broken glue time of described filter cake;
Described gel breaker adds described simulated solution after discharging described broken glue test bucket (4) again, and described simulated solution loses medium (7) through described filter, breaks the simulated solution fluid loss rate V after glue under recording preset temp and pressure2;
Simulated solution fluid loss rate V after broken glue2With the simulated solution fluid loss rate V before broken glue1Per-cent be broken glue efficiency.
In the present invention, simulated solution includes but not limited to fresh water, simulated formation water, kerosene, treated oil.
In the test process of the present invention, increaseing slowly when filter loss starts, when after the broken glue of filter cake, filter loss increases suddenly, timing definition when filter loss being increased suddenly is the broken glue time of filter cake; After the broken glue polluted filter mistake medium, the per-cent of the fluid loss rate that the fluid loss rate of simulated solution loses the not comtaminated broken glue front simulation liquid of medium with filter is defined as brokenly glue efficiency.
Compared with prior art, the present invention efficiently solves conventional broken glue performance test methods and can not evaluate gel breaker to a difficult problem for the broken glue performance of filter cake under the on-the-spot formation condition of accurate simulation. The broken glue performance testing device of filter cake can be recorded when using different filter to lose medium by the gel breaker of the present invention accurately and efficiently, and the broken glue time of filter cake and broken glue efficiency, provide the technical parameter of relatively high reference meaning for accurately evaluating the broken glue performance of filter cake. Under all right simulation stratum condition of the present invention simultaneously, measure the filter loss that working fluid loses medium after filtration.
The gel breaker of the present invention is simple to the broken glue performance testing device structure of filter cake, good stability and workable, efficiency of measurement and precision height, fill up the deficiency that tradition cannot evaluate the broken glue effect of filter cake, for accurately evaluating gel breaker, the broken glue performance of filter cake is provided good technical parameter, strong technical support and theoretical foundation are provided for site work.
The broken glue performance testing device of filter cake after filter mistake formation filter cake, can be started to measure the broken glue time of filter cake and broken glue efficiency at drilling fluid by the gel breaker of the present invention on filter mistake medium, thus can site work.
Accompanying drawing explanation
Accompanying drawing be used to provide to technical solution of the present invention it is further understood that and form the part of specification sheets, be used from the technical scheme explaining the present invention with the embodiment one of the application, do not form the restriction to technical solution of the present invention.
Fig. 1 is that the gel breaker according to one embodiment of the invention is to the schematic diagram of the broken glue performance testing device of filter cake;
Fig. 2 shows the figure filter loss of the Weak Gels drilling fluid that the broken glue performance testing device of filter cake records changed in time by the gel breaker according to one embodiment of the invention;
Fig. 3 shows the breaking glue solution recorded by the broken glue performance testing device of filter cake by the gel breaker according to one embodiment of the invention for the figure changed in time in the broken glue process of filter cake.
Embodiment
Lose using porous emery disc as filter below medium, using Weak Gels drilling fluid as test drilling fluid and take fresh water as simulated solution to illustrate that the gel breaker of the present invention is to the broken glue performance testing device of filter cake and test and using method.
As shown in Figure 1, during test, first check broken glue test bucket 4, test installation in bucket 4 at broken glue and there is the porous emery disc 7 that perm-plug method is 400mD; Test in bucket 4 to broken glue and add 150ml fresh water; The liquid feeding end threaded cap 3 of broken glue test bucket 4 is tightened and broken glue is tested bucket 4 and is placed in heating unit 5, connect pipeline and high-pressure air source 1; Open brokenly the liquid feeding end valve rod 2 of glue test bucket 4, broken glue is tested bucket 4 and is forced into 0.5MPa. The temperature using heating unit 5 that broken glue is tested bucket 4 control and after being stabilized in 80 DEG C, opens outlet end valve rod 9, and when fresh water all flows out from broken glue test bucket 4, test terminates. In fresh water outflow process, it may also be useful to metering system 10 and acquisition system 11 record the fresh water fluid loss rate V flowing through porous emery disc1For 24.34ml/min.
Then, close the outlet end valve rod 9 of broken glue test bucket 4, taken out after making brokenly glue test bucket 4 be down to room temperature; Turn on brokenly the liquid feeding end threaded cap 3 of glue test bucket 4, test the Weak Gels drilling fluid to be tested (taking the PRD drilling fluid of oilfield chemistry research institute purchased from CNOOC) adding 150mL in bucket 4 to broken glue. Again the liquid feeding end threaded cap 3 of broken glue test bucket 4 is tightened and broken glue is tested bucket 4 and is placed in heating unit 5, connect pipeline and high-pressure air source 1. Open brokenly the liquid feeding end valve rod 2 of glue test bucket 4, and broken glue is tested bucket 4 and is forced into 3.5MPa. The temperature using heating unit 5 that broken glue is tested bucket 4 control and after being stabilized in 80 DEG C, open outlet end valve rod 9, use metering system 10 and acquisition system 11 to record the filter loss in 30min simultaneously, filtrate is by emery disc filtering and forms, in filter mistake process, the filter loss graphic representation over time that filter cake 6, Fig. 2 shows Weak Gels drilling fluid gradually.
Then, close the outlet end valve rod 9 of broken glue test bucket 4, taken out after making brokenly glue test bucket 4 be down to room temperature; Turn on brokenly the liquid feeding end threaded cap 3 of glue test bucket 4, pour out Weak Gels drilling fluid, then add the ammonium persulfate solution (gel breaker) that 150ml concentration is 3%; Again the liquid feeding end threaded cap 3 of broken glue test bucket 4 is tightened and broken glue is tested bucket 4 and is placed in heating unit 5, connect pipeline and high-pressure air source 1. Open brokenly the liquid feeding end valve rod 2 of glue test bucket 4, and broken glue is tested bucket 4 and is forced into 50PSI. The temperature using heating unit 5 that broken glue is tested bucket 4 control and after being stabilized in 80 DEG C, open outlet end valve rod 9, use metering system 10 and acquisition system 11 to measure gel breaker to the filter loss in the broken glue process of filter cake 6 simultaneously, as shown in Figure 3, when 71.3min, filter loss increases suddenly, illustrates that the broken glue time of filter cake is 71.3min, all testing bucket 4 after outflow from broken glue until gel breaker, gel breaking test terminates.
After gel breaking test terminates, close the outlet end valve rod 9 of broken glue test bucket 4, taken out after making brokenly glue test bucket 4 be down to room temperature; Turn on brokenly the liquid feeding end threaded cap 3 of glue test bucket 4, after pouring out gel breaker, add 150ml fresh water; Again the liquid feeding end threaded cap 3 of broken glue test bucket 4 is tightened and broken glue is tested bucket 4 and is placed in heating unit 5, connect pipeline and high-pressure air source 1. Open brokenly the liquid feeding end valve rod 2 of glue test bucket 4, and broken glue is tested bucket 4 and is forced into 0.5MPa. The temperature using heating unit 5 that broken glue is tested bucket 4 control and after being stabilized in 80 DEG C, opens outlet end valve rod 9, simultaneously use metering system 10 and acquisition system 11 to measure average filter mistake rate V that porous emery disc filter cake breaks fresh water after glue2For 21.95ml/min, the fresh water fluid loss rate V of porous emery disc after broken glue2With the fresh water fluid loss rate V of porous emery disc before broken glue1Per-cent be broken glue efficiency, V2/V1=21.95/24.34=90.18, namely broken glue efficiency is 90.18%.
Although the enforcement mode disclosed by the present invention is as above, but the enforcement mode that described content only adopts for ease of understanding the present invention, it does not mean to limit the present invention. Those skilled in the art in the invention, under the prerequisite of the scope and spirit defined by claim book not departing from the present invention, it is possible to carry out any amendment and change in form of implementation and details.
Claims (4)
1. gel breaker is to a test set for the broken glue performance of filter cake, comprising:
Pressurizing device (1),
Heating unit (5),
Broken glue test bucket (4), it is arranged in described heating unit (5) removably, it is provided with filter in described broken glue test bucket (4) and loses medium (7), described broken glue test bucket (4) has liquid feeding end (2) and outlet end (9), and described liquid feeding end (2) is connected to described pressurizing device (1);
Metering system (10), it is arranged on the lower section of described outlet end (9), tests the filter loss of drilling fluid to be measured in bucket and the filter loss of gel breaker for measuring described broken glue; And
Acquisition system (11), it is connected to described metering system (10), for gathering the filter loss data that described metering system measures in real time.
2. test set according to claim 1, wherein said filter is lost medium (7) and is comprised porous emery disc, filter paper or quartz sand.
3. using test set as claimed in claim 1 test gel breaker to a method for the broken glue performance of filter cake, it comprises the steps:
Adding simulated solution in broken glue test bucket (4), described simulated solution loses medium (7) through filter and discharges described broken glue test bucket (4) afterwards, breaks the simulated solution fluid loss rate V before glue under recording preset temp and pressure1;
After described simulated solution discharges described broken glue test bucket (4), add drilling fluid, described drilling fluid loses medium (7) through described filter, forms filter cake in described filter mistake medium (7), records the filter loss of drilling fluid under preset temp and pressure;
After described broken glue test bucket (4) discharged by described drilling fluid, adding gel breaker, described gel breaker, through described filter mistake medium (7), records the filter loss of gel breaker under preset temp and pressure, time when record filter loss increases suddenly, it is the broken glue time of described filter cake;
Described gel breaker adds described simulated solution after discharging described broken glue test bucket (4) again, and described simulated solution loses medium (7) through described filter, breaks the simulated solution fluid loss rate V after glue under recording preset temp and pressure2;
Simulated solution fluid loss rate V after broken glue2With the simulated solution fluid loss rate V before broken glue1Per-cent be broken glue efficiency.
4. method according to claim 3, wherein said simulated solution comprises fresh water, simulated formation water, kerosene, treated oil.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410165651.6A CN103940963B (en) | 2014-04-23 | 2014-04-23 | A kind of gel breaker is to the test set of the broken glue performance of filter cake and testing method |
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| CN201410165651.6A CN103940963B (en) | 2014-04-23 | 2014-04-23 | A kind of gel breaker is to the test set of the broken glue performance of filter cake and testing method |
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| CN103940963A CN103940963A (en) | 2014-07-23 |
| CN103940963B true CN103940963B (en) | 2016-06-01 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112113760B (en) * | 2019-06-20 | 2022-12-02 | 中国石油天然气股份有限公司 | Device for evaluating dynamic performance of gel valve |
| CN111912732B (en) * | 2020-08-12 | 2022-04-29 | 成都派倬石油科技有限公司 | Open type experimental device and method for simulating multi-slug plug removal process |
| CN111929402B (en) * | 2020-08-12 | 2022-03-25 | 西南石油大学 | Open type experimental device and method for simulating single-section plug unblocking technological process |
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| CN103728209A (en) * | 2012-10-11 | 2014-04-16 | 艾佳 | Method for testing influence of gel breaker on stability of fracturing fluid |
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Patent Citations (8)
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| CN2812001Y (en) * | 2005-08-05 | 2006-08-30 | 张占山 | High-temperature high-pressure sand bed filtration tester |
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| CN201818298U (en) * | 2010-08-26 | 2011-05-04 | 中国海洋石油总公司 | Gel breaker tester for screen pipe well completion |
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Address after: 100010 Chaoyangmen North Street, Dongcheng District, Dongcheng District, Beijing Co-patentee after: China Oilfield Services Limited Patentee after: China Offshore Oil Group Co., Ltd. Address before: 100010 Chaoyangmen North Street, Dongcheng District, Dongcheng District, Beijing Co-patentee before: China Oilfield Services Limited Patentee before: China National Offshore Oil Corporation |
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