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Device for measuring breakthrough pressure under rock sample simulated stratum conditions

A technology for simulating strata and rock samples. It is used in measuring devices, using stable tension/pressure to test the strength of materials, instruments, etc. It can solve the problem that the back end of the rock sample cannot be pressurized, and achieve the effect of ensuring reliability.

Active Publication Date: 2011-05-11
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0015] The present invention aims to solve the problem that the back end of the rock sample cannot be pressurized in the existing testing process. Only when the back end of the rock sample is pressurized to increase the boiling point of the fluid can the rock sample remain in fluid saturation under high temperature conditions. state, making the measurement results more reliable

Method used

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  • Device for measuring breakthrough pressure under rock sample simulated stratum conditions
  • Device for measuring breakthrough pressure under rock sample simulated stratum conditions
  • Device for measuring breakthrough pressure under rock sample simulated stratum conditions

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Embodiment Construction

[0041] A specific embodiment of the present invention is introduced below. The scope of protection of the present invention is based on the claims, and is not limited by this embodiment.

[0042] First, according to the process of the Petroleum and Natural Gas Industry Standard of the People's Republic of China (SY / T 5748-1995), the control process before the core is designed.

[0043] Then complete the following work:

[0044] 1. At the back end of the rock core chamber, a section of metal pipe 71 is installed at the outlet end of the holder,

[0045] 2. Install cooling fins 72 on the outer wall of the metal tube 71 to reduce the temperature conducted by the core chamber,

[0046] 3. Install a thick-walled quartz tube 73 above the metal tube 71. The inner diameter of the quartz tube 73 is 8mm, the wall thickness is 4mm, and the length of the tube is about 8cm.

[0047] 4. The places where the two ends of the quartz tube 73 are connected to the metal parts are sealed by ext...

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Abstract

The invention relates to a device for measuring breakthrough pressure under rock sample simulated stratum conditions, which is mainly characterized in that a pressure system is additionally arranged at the outlet end of a core clamper to ensure that liquid behind the core can not be boiled and evaporated due to temperature rise. The pressure system comprises two parts, one is a preceding state cooling treatment device, one section of metal pipe is additionally arranged at the outlet end of the core and a heat radiating sheet is additionally arranged outside the metal pipe; and the other part is a backward state pressurizing and detecting system, a pressure source realizes constant pressure through a constant pressure pump, an air bubble detection part is characterized in that an optical fiber air bubble detector is sleeved outside a thick-walled quartz tube and connected with a computer for realizing automatic detection and ensuring that the experiment is used for measuring parametersof the breakthrough pressure under the stimulated stratum condition, wherein the parameters have important significance on the cap rock evaluation.

Description

technical field [0001] The invention relates to the field of measuring physical properties of rock samples, in particular to a device for measuring gas breakthrough pressure when rocks are saturated with different fluids. Background technique [0002] In the field of determination of physical properties of rock samples, the concept of breakthrough pressure is the minimum pressure required for the non-lubricated wet phase fluid to overcome the capillary pressure of the wet phase fluid in porous media to form a continuous mobile phase. The breakthrough pressure parameter can directly evaluate the sealing ability of the caprock, and calculate the gas column height that the caprock can seal the natural gas, which is an indispensable parameter in the caprock evaluation and resource evaluation. [0003] The breakthrough pressure of rock is not an inherent parameter, and its parameter will change in different physical states. In the laboratory, the determination of the breakthroug...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/12G01N3/06
Inventor 范明陈红宇承秋泉王强陈伟钧
Owner CHINA PETROLEUM & CHEM CORP
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