A device and method for accurately simulating self-absorption of drilling and completion fluid under in-situ conditions

A technology of drilling, completion and self-priming, which is applied in measuring devices, teaching models, suspension and porous material analysis, etc. It can solve the problems of low accuracy of core self-priming, eliminate the influence of evaporation, avoid sloshing and maintain stability Effect

Active Publication Date: 2022-05-20
CHENGDU UNIVERSITY OF TECHNOLOGY
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Problems solved by technology

[0008] In view of the above-mentioned deficiencies in the prior art, the present invention provides a device and method for accurately simulating the self-absorption of drilling and completion fluids under in-situ conditions, which solves the problem of low precision in the continuous measurement of core self-absorption

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  • A device and method for accurately simulating self-absorption of drilling and completion fluid under in-situ conditions
  • A device and method for accurately simulating self-absorption of drilling and completion fluid under in-situ conditions
  • A device and method for accurately simulating self-absorption of drilling and completion fluid under in-situ conditions

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Embodiment Construction

[0041] The specific embodiments of the present invention are described below so that those skilled in the art can understand the present invention, but it should be clear that the present invention is not limited to the scope of the specific embodiments. For those of ordinary skill in the art, as long as various changes Within the spirit and scope of the present invention defined and determined by the appended claims, these changes are obvious, and all inventions and creations using the concept of the present invention are included in the protection list.

[0042] Such as figure 1 with figure 2 As shown, the device for accurately simulating the self-priming volume of drilling and completion fluid under in-situ conditions includes a measurement group and a control group, the measurement group includes a first self-priming box 8, and a first liquid storage column is arranged on the first self-priming box 8 5. The upper end of the first liquid storage column 5 is provided with ...

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Abstract

The invention discloses a device and method for accurately simulating the self-absorption of drilling and completion fluid under in-situ conditions. The invention relates to the field of oil and gas field development. The invention supports and suspends the rock core through a fixed rod, and uses tension springs to suspend the self-absorption The precision balance contacts the bottom of the self-priming box through slow contact and shares part of the force of the tension spring, and the self-priming volume is obtained through the reading of the precision balance; at the same time, the liquid in the liquid storage column will be replenished into the self-priming box, Maintain a constant amount of liquid in the self-priming box, so that the liquid level sensor can also read the reduction of liquid; in addition, the control group can obtain the evaporation of liquid, and the total reduction of liquid minus the evaporation is the self-priming amount. The invention can monitor the self-absorption capacity of the rock core in real time without taking out the rock core for weighing, does not affect the accuracy of subsequent detection, eliminates the influence of evaporation, and makes the measurement accuracy higher.

Description

technical field [0001] The invention relates to the field of oil and gas field development, in particular to a device and method for accurately simulating self-absorption of drilling and completion fluid under in-situ conditions. Background technique [0002] Self-priming refers to a phenomenon in which liquid spontaneously enters the tiny pores of rock due to capillary force, osmotic pressure, gravity and surface hydration force. There are three types of factors that affect rock self-priming ability. The first is affected by rock mineral composition, permeability, porosity, etc.; the second is affected by the surface tension and viscosity of self-absorbing liquid; factors such as temperature and pressure. Drilling and completion fluid filtrate enters the interior of the rock through self-absorption, which induces water phase trap damage and affects the accurate evaluation of the reservoir and economic development in the later stage. Therefore, it is urgent to establish an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N15/08G09B23/40
Inventor 张世玉佘继平滕格格李阳倪建军张浩
Owner CHENGDU UNIVERSITY OF TECHNOLOGY
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