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Nuclear magnetism and rock electricity experiment process of mixed rock

A diamictite and nuclear magnetic technology, applied in the field of nuclear magnetic and rock electric experiment technology, can solve the problems of tight core displacement difficulties and low signal-to-noise ratio of experimental results, so as to improve the effect of washing oil and salt, improve the accuracy of experiments, and ensure the effect of clarity

Pending Publication Date: 2020-06-19
BC P INC CHINA NAT PETROLEUM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Diamictite reservoirs are dense, often with nanoscale intercrystalline pores, and tight cores have prominent problems such as difficult displacement and low signal-to-noise ratio of experimental results. Therefore, it is necessary to innovate and improve traditional conventional sample experimental parameters and processes to obtain Higher-precision experimental results, which are of great significance to deepen the understanding of this type of reservoir and the exploration and development of oilfields

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  • Nuclear magnetism and rock electricity experiment process of mixed rock
  • Nuclear magnetism and rock electricity experiment process of mixed rock
  • Nuclear magnetism and rock electricity experiment process of mixed rock

Examples

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Embodiment 1

[0044] The present invention takes the actual petrophysical experiment of a typical diamictite coring well in an oil field as an example, and takes No. 2 sample of Well X for the experiment, and the experiment process includes:

[0045] Step 1, place the diamictite rock sample in an airtight container, and vacuumize to a vacuum degree of 6.7×10 -4 Pa; the holding time under vacuum is 6h; then the rock sample is placed in carbon tetrachloride and then placed in benzyl alcohol solvent for pressure cleaning, the pressure is 1MPa, and the cleaning time is 72h;

[0046] Step 2, after the cleaning is completed, put the rock sample in a closed container and vacuumize to a vacuum degree of 6.7×10 - 4 Pa;, the holding time under vacuum is 3h;

[0047] Step 3, configure the NaCl saturated solution that is consistent with the actual formation. This example is a NaCl saturated solution with a high salinity of 260,000 ppm. Place the rock sample treated in step 2 in the NaCl saturated sol...

Embodiment 2

[0053] The present invention takes the actual petrophysical experiment of a typical diamictite coring well in an oil field as an example, sample No. 8 of Well Y, and the experimental process includes:

[0054] Step 1, place the diamictite rock sample in an airtight container, and vacuumize to a vacuum degree of 6.7×10 -2 Pa; the holding time under vacuum is 4h; then the rock sample is placed in carbon tetrachloride and then placed in benzyl alcohol solvent for pressure cleaning, the pressure is 0.5MPa, and the cleaning time is 36h;

[0055] Step 2, after the cleaning is completed, put the rock sample in a closed container and vacuumize to a vacuum degree of 6.7×10 - 2 Pa, the holding time under vacuum is 2h;

[0056] Step 3, configure the NaCl saturated solution that is consistent with the actual formation. This example is a NaCl saturated solution with a high salinity of 260,000 ppm. Place the rock sample treated in step 2 in the NaCl saturated solution for immersion satura...

Embodiment 3

[0062] The present invention takes the actual petrophysical experiment of a typical diamictite coring well in an oilfield as an example, and the experimental process includes:

[0063] Step 1, place the diamictite rock sample in an airtight container, and vacuumize to a vacuum degree of 6.7×10 -3 Pa; the holding time under vacuum is 7h; then the rock sample is firstly placed in carbon tetrachloride and then placed in benzyl alcohol solvent for pressure cleaning, the pressure is 1.5MPa, and the cleaning time is 96h;

[0064] Step 2, after the cleaning is completed, put the rock sample in a closed container and vacuumize to a vacuum degree of 6.7×10 - 3 Pa, the holding time under vacuum is 5h;

[0065] Step 3, configure the NaCl saturated solution that is consistent with the actual formation. In this example, it is a NaCl saturated solution with a high salinity of 200,000 ppm. Place the rock sample treated in step 2 in the NaCl saturated solution for immersion saturation. The ...

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Abstract

The invention provides a nuclear magnetism and rock electricity experiment process for mixed rock, which comprises the following steps: 1, placing a rock sample of the mixed rock in a closed container, and conducting vacuumizing treatment; then placing the rock sample in a solvent for pressurized cleaning; 2, after cleaning is completed, placing the rock sample in the closed container again, and conducting vacuumizing treatment; 3, preparing a NaCl saturated solution, and placing the rock sample treated in the step 2 in the NaCl saturated solution for impregnation saturation; 4, carrying out nuclear magnetic testing on the rock sample obtained in the step 3; and 5, carrying out rock electricity test on the rock sample obtained after the test in the step 4. According to a full oil salt washing principle, a traditional direct oil salt washing means is abandoned, and the rock sample is vacuumized and then cleaned, so that a cleaning solvent can enter nanoscale intercrystalline pores of the compact rock sample more easily, the rock sample washing degree is ensured as much as possible, the oil salt washing effect is improved, and the experimental measurement precision is effectively improved.

Description

technical field [0001] The invention relates to the improvement of rock physics experiment technology of complex reservoir, in particular to a nuclear magnetic and rock electricity experiment technology of diamictite. Background technique [0002] The concept of diamictite was proposed by Mount for the mixed deposition of carbonate rock and clastic rock. Diamictite research has become a new discipline that has gradually emerged in recent years. The mixed sedimentary phenomenon leads to the mixed lithology, which may be the mixture of clastic rock and carbonate rock, or the mixture of clastic rock, carbonate rock and evaporite rock. [0003] Diamictite reservoirs are dense, often with nanoscale intercrystalline pores, and tight cores have prominent problems such as difficult displacement and low signal-to-noise ratio of experimental results. Therefore, it is necessary to innovate and improve traditional conventional sample experimental parameters and processes to obtain Hig...

Claims

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Application Information

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IPC IPC(8): G01N24/08G01N27/00
CPCG01N24/08G01N27/00Y02A90/30
Inventor 张程恩令狐松张审琴吴颜雄李国利刘倩茹徐文远刘春雷李庆波单沙沙崔涵郭正权刘国良张晓秋
Owner BC P INC CHINA NAT PETROLEUM CORP
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