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Simulating experiment method of rock natural seepage ability

A technique for simulating experiments and seepage, applied in permeability/surface area analysis, measuring devices, suspension and porous material analysis, etc., can solve problems that are difficult to directly and accurately reflect the actual seepage capacity of rocks

Active Publication Date: 2014-07-23
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the current evaluation of rock seepage capacity is difficult to directly and accurately reflect the actual rock seepage capacity.

Method used

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  • Simulating experiment method of rock natural seepage ability
  • Simulating experiment method of rock natural seepage ability
  • Simulating experiment method of rock natural seepage ability

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The experimental sample is a 3293.37m core column sample from Well 1, with a length of 1.2cm and a diameter of 2cm. The rock type is shale-bearing dolomitic fine-grained lithic arkose sandstone. Porosity 13%, permeability 0.76×10 -3 μm 2 . The fluid pressure of the coring section is 31.64 MPa. The formation temperature is 130°C.

[0027] Experimental conditions: the solution is KCl solution, the concentration is 5000mg / L; the experimental pressure is 10MPa. The flow rate of the injection pump in the reactor is 1.5ml / min, and the flow rate of the injection pump at the confining pressure of the reactor is 2ml / min.

[0028] Experimental temperature control: Under the condition of 20°C in the room, start timing at the outlet of the displacement fluid, after 2 hours of displacement. The electronically controlled temperature was raised to 130°C, and the displacement was stabilized for 1 hour. The temperature is electronically controlled to 210°C, and the displacement ...

Embodiment 2

[0038] The experimental sample is a 3293.37m core column sample from Well 1, with a length of 4.8cm and a diameter of 2.45cm. The rock type is shale-bearing dolomitic fine-grained lithic arkose sandstone. Porosity 13%, permeability 0.76×10 -3 μm 2 . The fluid pressure of the coring section is 31.64 MPa. The formation temperature is 130°C.

[0039] Experimental conditions: the solution is KCl solution, the concentration is 5000mg / L; the experimental pressure is 30MPa. The flow rate of the injection pump in the reactor is 1.5ml / min, and the flow rate of the injection pump at the confining pressure of the reactor is 2ml / min.

[0040] Experimental temperature control: Under the condition of 20°C in the room, start timing at the outlet of the displacement fluid, after 2 hours of displacement. The electronically controlled temperature was raised to 130°C, and the displacement was stabilized for 1 hour. The temperature is electronically controlled to 210°C, and the displaceme...

Embodiment 3

[0054] The experimental sample was selected from Well Xia 503 in Huimin Sag with a length of 3387.5m and a core length of 3.61cm and a diameter of 2.48cm. The rock type is very fine-grained arkose. Porosity 13%, permeability 2.12×10 -3 μm 2 . The fluid pressure of the coring section is 41.50MPa. The formation temperature is 133°C.

[0055] Experimental conditions: the solution is KCl solution with a concentration of 5000mg / L; the experimental temperature of formation conditions is 133°C; the experimental pressure is 40MPa. The flow rate of the injection pump in the reactor is 2.5ml / min, and the flow rate of the injection pump at the confining pressure of the reactor is 2ml / min.

[0056] Experimental temperature control: Under the condition of 20°C in the room, start timing at the outlet of the displacement fluid, after 2 hours of displacement. The electronically controlled temperature was raised to 130°C, and the displacement was stabilized for 3 hours. The temperature ...

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Abstract

The invention discloses a simulating experiment method of rock natural seepage ability, and the simulating experiment method comprises the following steps: properly preparing a dynamic high-temperature and high-pressure water rock simulation experiment set used in the simulating experiment method; placing a sample rock core column into a reaction kettle; injecting a prepared solution filled in a solution container into the reaction kettle via a transmission pump, performing rock core confining pressure and internal pressure control in the reaction kettle to keep the pressure of the sample rock core column to be consistent with that of a real formation; using a temperature control system to set reaction temperature, heating the reaction kettle; using a counterbalance valve for regulating the pressure of the reaction kettle to a formation pressure demanded by an experiment; after an experiment fluid flows out via the sample rock core column in the reaction kettle, recording liquid out-letting amount of an outlet liquid in even space to obtain the rock core column seepage ability, namely seepage velocity with the unit of ml / min; according to the rock core column seepage ability and an actual wellbore oil drainage area, extrapolating daily fluid production rate of every unit thickness per meter. The method can truly and directly reflect rock actual seepage ability, so that the purpose of effectiveness evaluation of a reservoir stratum can be achieved.

Description

technical field [0001] The invention relates to a rock simulation experiment method, in particular to a rock natural seepage ability simulation experiment method. Background technique [0002] In the process of oil and gas exploration, how to accurately and easily obtain rock seepage capacity parameters is very critical for the evaluation of low-permeability sandstone reservoirs. The current evaluation of rock seepage capacity is generally determined based on conventional core analysis data, oil test data and formation test data, and is measured by the minimum effective porosity and minimum permeability that can store and infiltrate fluids, usually by porosity or permeability expressed by a certain value. [0003] These parameters are generally obtained by testing the core to the medium. For example, the determination of air permeability is to dry the fluid in the core in an oven, and then pass air into the core holder to measure the air permeability of the core. . In the...

Claims

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Application Information

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IPC IPC(8): G01N15/08
Inventor 刘宝军李博滕建彬谢忠怀刘宁王伟庆郝运轻朱丽鹏
Owner CHINA PETROLEUM & CHEM CORP
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