Method and device for analyzing light fraction compounds in petroleum hydrocarbon source rock

An analysis method and source rock technology, applied in the direction of analysis materials, preparation of test samples, material separation, etc., can solve problems such as loss, environmental protection problems, small sample size, etc., and achieve the effect of avoiding loss

Active Publication Date: 2009-01-28

PETROCHINA CO LTD

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AI-Extracted Technical Summary

Problems solved by technology

The domestic Sinopec Wuxi Central Laboratory has launched a complete set of equipment "WX-2001 Cuttings Sealed Cutting Extractor", which uses Freon to extract source rocks, volatilize and concentrate, and then conduct chromatographic analysis. 6 -C 32 The results of chromatographic analysis of hydrocarbon composition. This method uses freon extraction, so there are environmental problems; the device for analyzing light hydrocarbons in rocks at the Langfang Branch of the China Petroleum Exploration and Development Research Institute is a combination of a pyrolysis device produ...

Abstract

The invention relates to an analyzing method of light distillate compounds in petroleum hydrocarbon source rocks and a device thereof. The analysis of the light distillate compounds that are contained in organic matters dispersing in the hydrocarbon source rocks is implemented in a liquid nitrogen freezing and impact crushing device and a sealed heating and online chromatogram sampling and analyzing device. A rock sample is quickly crushed into powder by an impact hammer in a liquid nitrogen freezing sample container, the sample powder is hermetically heated, the organic matters dispersing in the sample is thermally desorbed and blown into a liquid nitrogen cold trap in a chromatogram oven by helium gas, the cold trap is taken down after the thermal desorption is finished, and a chromatogram analyzing program is started, wherein, the largest diameter of analyzed samples can reach 2cm, the feeding amount of the liquid nitrogen is 7ml, the emptying time is 90sec, the thermal desorption temperature is 200 DEG C, and the homothermal time lasts for 10 minutes. The analyzing method of the light distillate compounds in the petroleum hydrocarbon source rocks does not have light distillate loss, and can obtain the chromatogram peak of hydrocarbon substances that have carbon number greater than C5, consistent separating effect with the analyzing effect of high-quality crude oil light distillates, straight chromatogram baseline, and good reproducibility of the chromatogram peak.

Application Domain

Component separationPreparing sample for investigation

Technology Topic

Amount of substanceChemistry +13

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$Method and device for analyzing light fraction compounds in petroleum hydrocarbon source rock$
$Method and device for analyzing light fraction compounds in petroleum hydrocarbon source rock$
$Method and device for analyzing light fraction compounds in petroleum hydrocarbon source rock$

Examples

Experimental program(2)
Effect test(1)

Example Embodiment

[0020] Example 1

[0021] (1) The liquid nitrogen freezing and impact crushing device includes a vacuum liquid nitrogen cup 7, a sample container 9, an air compressor 2, an impact hammer 3, a linear bearing bracket 11 and a lifting cylinder 4. The sample container 9 is placed in the vacuum liquid nitrogen cup 7, and is fixed under the device by the support plate 8. The impact hammer 3 is located above the mouth of the sample container and fixed on the linear bearing bracket 11, and the linear bearing bracket is fixed on the slide rails at both ends of the device. 12, the slide rails are vertically fixed on both sides of the device, the air compressor 2 is located on the linear bearing bracket 11 and connected to the impact hammer 3. The upper end of the air compressor is fixed on the lower end of the cylinder cross bar 1, the cylinder cross bar 1 and the two ends The lifting rod 10 of the lifting cylinder 4 is connected, and the lifting is completed by two cylinders. The vacuum liquid nitrogen cup is filled with liquid nitrogen 5, and the sample container is filled with liquid nitrogen and sample 6.

[0022] (2) Sealed heating, helium purging chromatographic online sampling analysis device includes a sealed heating furnace 15, a vacuum insulated cup 17, a capillary column 13, and a chromatographic analyzer 14. One end of the capillary column 13 is connected to the bottom of the sealed heating furnace 15, and the middle part is immersed The end of the nitrogen liquid 16 in the vacuum insulated cup is connected to the FID detector 14 of the chromatograph.

Example Embodiment

[0023] Example 2-17

[0024] Using the equipment of Example 1, the main test conditions are listed in Table 1.

[0025] Table 1 Conditional experimental data (partial)

[0026] Serial number

[0027] 4

[0028] 1. Test sample

[0029] There are three types of test samples:

[0030] ① Prepared light hydrocarbon standard samples: n-pentane, n-hexane, n-heptane and isooctane (nC5-iC8)

[0031] ②Light crude oil: Pinghu 4 well

[0032] ③Core sample: 765.18m from Well Wu102, Wangfu Sag, Bin County, Daqing

[0033] 2. Determination of the amount of liquid nitrogen added and the emptying time

[0034] The amount of liquid nitrogen added and the emptying time are mainly determined by the effect of the chromatogram. After adjusting the amount of liquid nitrogen and the emptying time (see Table 1 for detailed conditions), the conditions of 7ml of liquid nitrogen and 90min of emptying are determined by preference. figure 1 with figure 2 It can be seen that the baseline of the chromatogram after adding liquid nitrogen is very flat, and the effect is ideal.

[0035] 3. Determination of thermal analysis temperature and constant temperature time

[0036] Thermal analysis temperature and constant temperature time directly affect the degree of hydrocarbon gasification and cold trap trapping of samples in the heating furnace. image 3 with Figure 4 It can be seen that the light fraction (C 5 -C 15 ) More complete, nC 15 /nC 13 The ratios are 1.51 and 0.84 respectively. See Table 2 for detailed data. Therefore, it is determined that the heating temperature of crude oil is 200℃, 10min, and the heating temperature of rock is 200℃, 20min.

[0037] Table 2 Experimental data of thermal analysis temperature and constant temperature time

[0038] Serial number

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Method and device for analyzing light fraction compounds in petroleum hydrocarbon source rock

An analysis method and source rock technology, applied in the direction of analysis materials, preparation of test samples, material separation, etc., can solve problems such as loss, environmental protection problems, small sample size, etc., and achieve the effect of avoiding loss

AI-Extracted Technical Summary

Problems solved by technology

Abstract

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Examples

Example Embodiment

Example Embodiment

PUM

Description & Claims & Application Information

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