A monitoring device for formation fluid pressure of core samples
A core sample and monitoring device technology, which is applied in the direction of measuring fluid pressure, measuring device, measuring fluid pressure through electromagnetic elements, etc., can solve the problem of inability to monitor the transmission pressure value, etc., and achieve the effect of simple structure
Active Publication Date: 2019-08-16
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology
[0004] The existing monitoring device has the problem that when the mud shale produces cracks, during the pressure transmission process, a single measuring point that is not in the direction of the fracture will not be able to monitor the transmitted pressure value
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[0020] The present invention will be further described below with reference to the accompanying drawings.
[0021] see figure 1 and figure 2 , which are respectively the overall structural cross-sectional schematic diagram of the monitoring device for formation fluid pressure of core samples of the present invention and the structural schematic diagram of the multi-point pressure monitoring assembly of the monitoring device for formation fluid pressure of core samples of the present invention. like figure 1 As shown, the monitoring device is used to monitor the pressure transfer of the core sample 6 in different directions. In the embodiment of the present application, the core sample 6 may be, for example, shale containing fractures. The monitoring device includes a housing 1 , an end cover 2 , a blocking part 3 , a sleeve assembly 4 and a pressure monitoring assembly 5 .
[0022] In the embodiment of the present application, the whole of the casing 1 is substantially cy...
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The invention relates to a monitoring device for formation fluid pressure of a core sample. The monitoring device comprises a shell, an end cover, a plugging portion, a sleeving assembly and pressure monitoring assemblies, wherein a hollow area is arranged in the shell, the end cover is fixedly installed at an upper end opening of the shell, the plugging portion is located in the hollow area and close to the bottom of the shell, the sleeving assembly is arranged at the peripheral walls of the end cover and the plugging portion to form a containing area for containing the core sample, pressure support portions are circumferentially and radially arranged on the peripheral wall of the sleeving assembly at intervals, and the pressure monitoring assemblies are correspondingly installed in the pressure support portions and used for monitoring the pressure transmission degrees in the different directions of the core sample. The monitoring device has the advantages of effectively monitoring the pressure transmission conditions in the different directions of the core sample and being simple and reliable in structure and accurate in monitoring result and well wall stability judgement.
Description
technical field [0001] The invention relates to the technical field of wellbore stability evaluation in the process of petroleum exploration and development, in particular to a monitoring device for formation fluid pressure of core samples. Background technique [0002] The existing shale borehole stability research has always been an engineering problem that has been paid great attention at home and abroad but has not been solved well, and is also one of the important factors restricting the exploration and development speed of my country's oil and gas fields. Therefore, the study of shale pressure transfer is helpful to understand the mechanism of shale wellbore instability. The principle of shale pressure transfer experiment simulation is realized by evaluating the permeability of shale. The permeability of shale is the main parameter to evaluate the pressure gradient characteristics of shale under the action of hydraulic pressure difference. [0003] The existing monit...
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IPC IPC(8): G01N15/08G01L9/00
Inventor曾义金王怡陈军海石秉忠张金成孙连环牛新明徐江陈一健张伦平吴超韩艳浓
OwnerCHINA PETROLEUM & CHEM CORP