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Test device and test method for gel breaking performance of gel breaker on filter cake

A technology of testing devices and gel breakers, which is applied in the direction of measuring devices, instruments, scientific instruments, etc., can solve the problems of inaccurate simulation, etc., and achieve the effects of simple structure, strong operability, high measurement efficiency and precision

Active Publication Date: 2016-06-01
CHINA NAT OFFSHORE OIL CORP +1
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  • Claims
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AI Technical Summary

Problems solved by technology

Both methods have disadvantages, and cannot accurately simulate the field conditions: (1) the removal of the mud cake by the gel breaker under the formation pressure; (2) the continuous change of the filtration rate during the gel breaking process; (3) Gel breaking effect of simulated reservoir after gluing

Method used

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  • Test device and test method for gel breaking performance of gel breaker on filter cake
  • Test device and test method for gel breaking performance of gel breaker on filter cake
  • Test device and test method for gel breaking performance of gel breaker on filter cake

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Embodiment Construction

[0035] In the following, the porous sand disc is used as the filter loss medium, the weak gel drilling fluid is used as the test drilling fluid, and fresh water is used as the simulation fluid to illustrate the gel breaking performance test device of the gel breaker on the filter cake and the testing and use method of the present invention.

[0036] Such as figure 1 As shown, during the test, first check the gel-breaking test bucket 4, and install a porous sand disc 7 with a gas permeability of 400mD in the gel-breaking test bucket 4; add 150ml of fresh water to the gel-breaking test bucket 4; Tighten the threaded cap 3 of the liquid inlet end of the barrel 4 and place the rubber breaking test barrel 4 in the heating device 5, connect the pipeline and the high-pressure air source 1; open the liquid inlet valve stem 2 of the glue breaking test barrel 4, The test barrel 4 is pressurized to 0.5MPa. Use the heating device 5 to control and stabilize the temperature of the gel brea...

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Abstract

The invention discloses a device and a method for testing the gel breaking performance of a gel breaker for filter cake. The device comprises a pressure device (1), a heating device (5), a gel breaking test barrel (4), a measuring system (10) and a collection system (11), wherein the gel breaking test barrel (4) is arranged in the heating device (5) in a detachable way, is internally provided with a leak-off medium (7) and is provided with a liquid inlet end (2) and a liquid outlet end (9); the liquid inlet end (2) is connected with the pressure device (1); the measuring system (10) is arranged under the liquid outlet end (9); the collection system (11) is connected with the measuring system (10). The device is simple in structure, good in stability, high in operability and high in measurement efficiency and accuracy, overcomes the defect that a traditional device is not capable of evaluating the gel breaking effect for the filter cake, provides good technical parameters for accurately evaluating gel breaking performance of the gel breaker for the filter cake, and provides powerful technical support and theoretical basis for field operation.

Description

technical field [0001] The invention relates to a test device and a test method for the gel breaking performance of a gel breaker on a filter cake. Background technique [0002] In the process of drilling and completion, in order to reduce the damage of the solid-liquid relative to the reservoir, it is often necessary to form a filter cake with excellent performance near the wellbore. Reservoir production capacity. The main way to remove the filter cake is to carry out chemical deblocking operation by adding a breaker. [0003] At present, there are few experimental instruments for indoor simulation of gel breaker removal of filter cake near wellbore, and the traditional method is to combine the following two methods: (1) By measuring the viscosity reduction rate of gel breaker to drilling and completion fluid, calculate The gel breaking time of the mud cake; (2) Use the method of soaking the mud cake in the gel breaker to observe the removal status of the mud cake. Both ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N33/00
Inventor 陈缘博吕维军项涛苗海龙王宝林李松耿铁段连超陈俊生王冲敏
Owner CHINA NAT OFFSHORE OIL CORP
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