CN202793856U - Oil-gas phase state multi-layer sampling device - Google Patents
Oil-gas phase state multi-layer sampling device Download PDFInfo
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- CN202793856U CN202793856U CN 201220338375 CN201220338375U CN202793856U CN 202793856 U CN202793856 U CN 202793856U CN 201220338375 CN201220338375 CN 201220338375 CN 201220338375 U CN201220338375 U CN 201220338375U CN 202793856 U CN202793856 U CN 202793856U
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Abstract
The utility model relates to an oil-gas phase state multi-layer sampling device. The device comprises a PVT (pressure-volume-temperature) cylinder, sapphire glass, a plunger piston, an upper introduction port, a lower introduction port and multiple sampling pipes, wherein the PVT cylinder is used for storing an oil-gas test sample; the sapphire glass is used for sealing one end of the PVT cylinder; the plunger piston is arranged in the PVT cylinder, moves under the control of a stepping motor, and maintains the pressure in the PVT cylinder; the upper introduction port is arranged on the upper side wall of the PVT cylinder and used for injecting a stratum oil sample; the lower introduction port is arranged on the lower side wall of the PVT cylinder and used for injecting a gas sample; and the multiple sampling pipes are respectively connected with the positions at different heights on the side wall of the PVT cylinder and used for sampling components in each horizon. The oil-gas phase state multi-layer sampling device disclosed by the utility model can realize real-time analysis and online sampling of the components during the oil-gas phase-mixing process and truly reflect the process of gradually achieving the mixed phase after oil-gas contact. Furthermore, by using the oil-gas phase state multi-layer sampling device disclosed by the utility model, different miscible zones can be directly observed at the macroscopic level, and the changes in the components of the different miscible zones can be tested at the microscopic level.
Description
Technical field
The utility model is about oil gas component measuring technology, particularly about a kind of oil gas phase multilayer sampling device.
Background technology
The test of oil gas phase is a kind of basic test means commonly used of estimating formation oil character, and the oil gas phase parameter of obtaining exactly in the oil reservoir also just be unable to do without phase instrument (such as the PVT cylinder).Existing PVT cylinder only possesses P-V relation, repeatedly degassed, depletion experiments and the degassed power of test of single usually, yet, along with CO
2The on-the-spot large-scale experiment of the miscible-phase displacement, CO
2-formation oil mixed phase or nearly mixed phase state complex are changeable, and oil gas mixed phase or nearly mixed phase zone kind are more, and the PVT cylinder of existing design can not satisfy actual test request.
The utility model content
The utility model provides a kind of oil gas phase multilayer sampling device, to realize the component real-time analysis in the oil gas mixed phase process, online sampling, reflects truly the process that reaches gradually mixed phase after the oil gas body contacts.
To achieve these goals, the utility model provides a kind of oil gas phase multilayer sampling device, and this device comprises: the PVT cylinder is used for storing the oil gas specimen; Sapphire glass seals an end of described PVT cylinder; Plunger is located in the described PVT cylinder, and is mobile under the control of stepper motor, keeps the pressure in the described PVT cylinder; Upper injection port is located at the upper side wall of described PVT cylinder, is used for injecting the formation oil sample; Lower injection port is located at the lower wall of described PVT cylinder, is used for the injecting gas sample; Many stopple coupons are connected to the position of the differing heights of described PVT cylinder sidewall, are used for the component sampling to every one deck position.
Further, every one deck position is to there being two described stopple coupons.
Further, on the described stopple coupon of each root a valve is installed.
To achieve these goals, the utility model provides a kind of oil gas phase multilayer sampling method, and the method comprises: inject the formation oil sample by described lower injection port in described PVT cylinder, the liquid level of described formation oil sample is no more than the precalculated position; By described upper injection port injecting gas sample in the described PVT cylinder, when the position at the inner differing heights of described PVT cylinder presents the stratification of hot gas of different colours, pump is set as pressure constant state; By described stopple coupon the gas of stratum oil samples and different layerings is taken a sample; The injection of formation oil sample and the gas inject chromatograph of sampling are carried out oily proximate analysis and gas proximate analysis.
Further, during the injecting gas sample, make the pressure of gas in the described PVT cylinder maintain 7-10MPa by described upper injection port in the described PVT cylinder.
Further, by described stopple coupon the gas of stratum oil samples and different layerings is taken a sample, comprise: utilize the stopple coupon corresponding to height and position at formation oil sample place that the stratum oil samples is taken a sample, utilize the stopple coupon corresponding to height and position at the gas place of different layerings respectively the gas of different layerings to be taken a sample.
Further, described precalculated position is the downside d/5 At The Height of the described PVT cylinder of distance, and wherein d is the diameter of described PVT cylinder.
The beneficial effect of the utility model embodiment is that the utility model can be realized the component real-time analysis in the oil gas mixed phase process, online sampling, reflects truly the process that reaches gradually mixed phase after the oil gas body contacts.And by the utility model, can directly observe different miscible zones on the macroscopic view, can test the change of component of different blended facies tract on the microcosmic.
Description of drawings
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, the below will do one to the accompanying drawing of required use in embodiment or the description of the Prior Art and introduce simply, apparently, accompanying drawing in the following describes only is embodiment more of the present utility model, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the structural representation of the utility model one embodiment oil gas phase multilayer sampling device;
Fig. 2 is the utility model embodiment oil gas phase multilayer sampling method flow diagram;
Fig. 3 is the structural representation of another embodiment oil gas phase multilayer sampling device of the utility model.
Embodiment
Below in conjunction with the accompanying drawing among the utility model embodiment, the technical scheme among the utility model embodiment is clearly and completely described, obviously, described embodiment only is the utility model part embodiment, rather than whole embodiment.Based on the embodiment in the utility model, those of ordinary skills are not making the every other embodiment that obtains under the creative work prerequisite, all belong to the scope of the utility model protection.
As shown in Figure 1, present embodiment provides a kind of oil gas phase multilayer sampling device, and this device comprises: PVT cylinder 101, sapphire glass 102, plunger 103, upper injection port 104, lower injection port 105 and many stopple coupons (106-110).
As shown in Figure 1, PVT cylinder 101 is laterally placed (bottom surface that is PVT cylinder 101 is positioned on the vertical direction), is used for storing the oil gas specimen.One end of PVT cylinder 101 seals with sapphire glass 102.The PVT cylinder 101 interior plungers 103 that arrange, by step motor control plunger 103 in the 101 interior movements of PVT cylinder, to keep the pressure in the described PVT cylinder 101.
Fig. 2 is oil gas phase multilayer sampling method flow diagram, is applied to oil gas phase multilayer sampling device, and the method comprises:
Step S201: inject the formation oil sample by lower injection port 105 in PVT cylinder 101, the liquid level of formation oil sample is no more than the precalculated position.As shown in Figure 1, position 1 is this precalculated position.Preferably, position 1 need to prove that at the downside d/5 At The Height (wherein d is the diameter of described PVT cylinder) of the described PVT cylinder of distance position 1 can be set according to specific circumstances.
Step S202: finish after the injection of formation oil sample, by upper injection port 104, utilize pump injecting gas sample in the PVT cylinder 101, make the pressure of PVT cylinder 101 interior gases maintain 7-10MPa.
Along with the injection of gaseous sample, layering will appear in PVT cylinder 101 inside, when the position at PVT cylinder 101 inner differing heights presents the stratification of hot gas of different colours, pump is set as pressure constant state.
Step S203: the gas of stratum oil samples and different layerings is taken a sample by described stopple coupon.Concrete operation is: utilize the stopple coupon corresponding to height and position at formation oil sample place that the stratum oil samples is taken a sample, utilize the stopple coupon corresponding to height and position at the gas place of different layerings respectively the gas of different layerings to be taken a sample.As shown in Figure 1, many stopple coupons are located at the position (106-110) of differing heights on the sidewall of PVT cylinder 101, position 1, position 2, position 3 and position 4 are layered as component 1-component 4 with gas, the altitude range at component 1-component 4 places is corresponding is provided with stopple coupon 107-stopple coupon 110, and the altitude range at formation oil place is provided with stopple coupon 106.The valve 1 of opening on the stopple coupon 106 just can be taken a sample to formation oil.Opening the valve 2-valve 5 of stopple coupon 107-stopple coupon 110 just can take a sample to the gas of different layerings.
Preferably, as shown in Figure 3, position corresponding to formation oil and each stratification of hot gas can arrange respectively two highly different stopple coupons, take a sample from a stopple coupon wherein, generally take a sample from the formation oil middle part of the more close correspondence of height and position or that root stopple coupon at layering gas middle part.The correspondence position of formation oil arranges highly different stopple coupon 106-1 and stopple coupon 106-2.The correspondence position of the oil reservoir component 1 between position 1 and the position 2 arranges highly different stopple coupon 107-1 and stopple coupon 107-2.The correspondence position of the oil reservoir component 2 between position 2 and the position 3 arranges highly different stopple coupon 108-1 and stopple coupon 108-2.The correspondence position of the oil reservoir component 3 between position 3 and the position 4 arranges highly different stopple coupon 109-1 and stopple coupon 109-2.The correspondence position of the oil reservoir component 3 of 4 tops, position arranges highly different stopple coupon 110-1 and stopple coupon 110-2.
In Fig. 3, be separately installed with a valve on each root stopple coupon, be separately installed with valve 1-1 and valve 1-2 on stopple coupon 106-1 and the stopple coupon 106-2, be separately installed with valve 2-1 and valve 2-2 on stopple coupon 107-1 and the stopple coupon 107-2, be separately installed with valve 3-1 and valve 3-2 on stopple coupon 108-1 and the stopple coupon 108-2, be separately installed with valve 4-1 and valve 4-2 on stopple coupon 109-1 and the stopple coupon 109-2, be separately installed with valve 5-1 and valve 5-2 on stopple coupon 110-1 and the stopple coupon 110-2.In addition, stopple coupon 106-1 and stopple coupon 106-2 are connected to common valve 1-3, stopple coupon 107-1 and stopple coupon 107-2 are connected to common valve 2-3, stopple coupon 108-1 and stopple coupon 108-2 are connected to common valve 3-3, stopple coupon 109-1 and stopple coupon 109-2 are connected to common valve 4-3, and stopple coupon 110-1 and stopple coupon 110-2 are connected to common valve 5-3.
As shown in Figure 3, when formation oil is taken a sample, if stopple coupon 106-1 is nearer apart from the middle part of formation oil, need to take a sample from stopple coupon 106-1, if this moment need to open valve 1-1 and valve 1-3. stopple coupon 106-2 is nearer apart from the middle part of formation oil, need to take a sample from stopple coupon 106-2, need to open valve 1-2 and valve 1-3 this moment.
During to every layer of gas sample, during for example to the gas sample of component 1, if stopple coupon 107-1 is nearer apart from the middle part of gas, need to take a sample from stopple coupon 107-1, need to open valve 2-1 and valve 2-3 this moment.If stopple coupon 107-2 is nearer apart from the middle part of gas, need to take a sample from stopple coupon 107-2, need to open valve 2-2 and valve 2-3 this moment.To other components (component 2-component 4) when taking a sample, identical way during according to above-mentioned gas sample to component 1 is narrated no longer one by one at this.
Step S204: the injection of formation oil sample and the gas inject chromatograph of sampling are carried out oily proximate analysis and gas proximate analysis.
After finishing the sampling of formation oil or gas, just formation oil or the gas inject chromatograph of sampling can be carried out oily proximate analysis or gas proximate analysis.Table 1 has shown CO
2The extracting component content of different layers position in the-formation oil mixed phase process.
Table 1
| Component | Formation | Extracting component | 1 | Extracting |
Extracting |
Extracting |
| CO 2 | 0.49 | 53.74 | 65.708 | 79.675 | 90.486 | |
| N 2 | 0.19 | 0.10 | 0.076 | 0.057 | 0.038 | |
| C 1 | 31.3 | 15.65 | 12.52 | 9.39 | 6.26 | |
| C 2 | 5.22 | 2.61 | 2.088 | 1.566 | 1.044 | |
| C 3 | 4.46 | 2.23 | 1.784 | 1.338 | 0.892 | |
| iC 4 | 0.94 | 0.47 | 0.376 | 0.282 | 0188 |
| nC 4 | 2.68 | 1.34 | 1.072 | 0.804 | 0.536 |
| iC 5 | 1.1 | 0.55 | 0.44 | 0.33 | 0.22 |
| nC 5 | 1.68 | 0.84 | 0.672 | 0.504 | 0.336 |
| C 6 | 2.35 | 1.18 | 0.94 | 0.705 | 0.00 |
| C 7 | 3.71 | 1.86 | 1.484 | 1.113 | 0.00 |
| C 8 | 4.61 | 2.31 | 1.844 | 1.383 | 0.00 |
| C 9 | 3.68 | 1.84 | 1.472 | 1.104 | 0.00 |
| C 10 | 3.27 | 1.64 | 1.308 | 0.981 | 0.00 |
| C 11 | 2.56 | 1.28 | 1.024 | 0.768 | 0.00 |
| C 12 | 2.43 | 1.22 | 0.972 | 0.00 | 0.00 |
| C 13 | 2.39 | 1.20 | 0.956 | 0.00 | 0.00 |
| C 14 | 2.03 | 1.02 | 0.812 | 0.00 | 0.00 |
| C 15 | 2.04 | 1.02 | 0.816 | 0.00 | 0.00 |
| C 16 | 1.7 | 0.85 | 0.68 | 0.00 | 0.00 |
| C 17 | 1.75 | 0.88 | 0.7 | 0.00 | 0.00 |
| C 18 | 1.55 | 0.78 | 0.62 | 0.00 | 0.00 |
| C 19 | 1.45 | 0.73 | 0.58 | 0.00 | 0.00 |
| C 20 | 1.35 | 0.68 | 0.54 | 0.00 | 0.00 |
| C 21 | 1.29 | 0.65 | 0.516 | 0.00 | 0.00 |
| C 22 | 1.17 | 0.59 | 0.00 | 0.00 | 0.00 |
| C 23 | 1.19 | 0.60 | 0.00 | 0.00 | 0.00 |
| C 24 | 0.95 | 0.48 | 0.00 | 0.00 | 0.00 |
| C 25 | 0.93 | 0.47 | 0.00 | 0.00 | 0.00 |
| C 26 | 0.88 | 0.44 | 0.00 | 0.00 | 0.00 |
| C 27 | 0.83 | 0.42 | 0.00 | 0.00 | 0.00 |
| C 28 | 0.85 | 0.43 | 0.00 | 0.00 | 0.00 |
| C 29 | 0.83 | 0.00 | 0.00 | 0.00 | 0.00 |
| C 30 | 0.75 | 0.00 | 0.00 | 0.00 | 0.00 |
| C 31 | 0.63 | 0.00 | 0.00 | 0.00 | 0.00 |
| C 32 | 0.49 | 0.00 | 0.00 | 0.00 | 0.00 |
| C 33 | 0.42 | 0.00 | 0.00 | 0.00 | 0.00 |
| C 34 | 0.38 | 0.00 | 0.00 | 0.00 | 0.00 |
| C 35 | 0.32 | 0.00 | 0.00 | 0.00 | 0.00 |
| C 36+ | 3.16 | 0.00 | 0.00 | 0.00 | 0.00 |
| SUM | 100 | 100 | 100 | 100 | 100 |
Can characterize out CO preferably in the table 1
2The oil-gas component difference of different layers position, different phase in the-formation oil mixed phase process.The validity of the method is described, also can for studying from now on extracting mechanism and Diffusion Law, provides an effectively experimental technique.
The utility model can be realized the different mixed phase stages in the oil gas mixed phase process, the component real-time analysis of different layers position, online sampling, reflects truly the process that reaches gradually mixed phase after the oil gas body contacts.Can be in oil gas mixed phase or the nearly mixed phase process, the research of different hydrocarbons component extracting order and extracting intensity provides a kind of strong means.And by the utility model, can directly observe different miscible zones on the macroscopic view, can test the change of component of different blended facies tract on the microcosmic.
Above-described embodiment; the purpose of this utility model, technical scheme and beneficial effect are further described; institute is understood that; the above only is embodiment of the present utility model; and be not used in and limit protection domain of the present utility model; all within spirit of the present utility model and principle, any modification of making, be equal to replacement, improvement etc., all should be included within the protection domain of the present utility model.
Claims (3)
1. oil gas phase multilayer sampling device is characterized in that described device comprises:
The PVT cylinder is used for storing the oil gas specimen;
Sapphire glass seals an end of described PVT cylinder;
Plunger is located in the described PVT cylinder, and is mobile under the control of stepper motor, keeps the pressure in the described PVT cylinder;
Upper injection port is located at the upper side wall of described PVT cylinder, is used for injecting the formation oil sample;
Lower injection port is located at the lower wall of described PVT cylinder, is used for the injecting gas sample;
Many stopple coupons are connected to the position of the differing heights of described PVT cylinder sidewall, are used for the component sampling to every one deck position.
2. device according to claim 1 is characterized in that, every one deck position correspondence is provided with two described stopple coupons.
3. device according to claim 1 and 2 is characterized in that, on the described stopple coupon of each root a valve is installed.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102735503A (en) * | 2012-07-12 | 2012-10-17 | 中国石油天然气股份有限公司 | Oil-gas phase state multilayer sampling method and device |
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| CN102735503A (en) * | 2012-07-12 | 2012-10-17 | 中国石油天然气股份有限公司 | Oil-gas phase state multilayer sampling method and device |
| CN102735503B (en) * | 2012-07-12 | 2015-07-08 | 中国石油天然气股份有限公司 | Oil-gas phase state multilayer sampling method and device |
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