CN111624281A - Device and method for logging by utilizing rock debris oil gas inclusion - Google Patents
Device and method for logging by utilizing rock debris oil gas inclusion Download PDFInfo
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- CN111624281A CN111624281A CN202010560054.9A CN202010560054A CN111624281A CN 111624281 A CN111624281 A CN 111624281A CN 202010560054 A CN202010560054 A CN 202010560054A CN 111624281 A CN111624281 A CN 111624281A
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- 239000011435 rock Substances 0.000 title claims abstract description 91
- 238000000034 method Methods 0.000 title claims abstract description 34
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- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 12
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- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 claims description 9
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 8
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N30/00—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
- G01N30/02—Column chromatography
- G01N30/04—Preparation or injection of sample to be analysed
- G01N30/06—Preparation
Abstract
The invention discloses a device for logging by utilizing a rock debris oil gas inclusion, which comprises a ball mill, wherein a ball mill tank body is connected with a vacuum pump through a first valve, the ball mill tank body is connected with a gas collecting device through a second valve, a gas outlet of the gas collecting device is connected with a gas chromatograph through a third valve, and the gas chromatograph is also connected with a data processing terminal; the invention also discloses a logging method by utilizing the rock debris oil gas inclusion, by the logging method, the recognition of oil gas display can be increased, and the oil gas layer is prevented from being leaked, so that the oil gas layer position is accurately found.
Description
Technical Field
The invention belongs to the technical field of oil and gas drilling and logging, and particularly relates to a device and a method for logging by using a rock debris oil and gas inclusion.
Background
The ultimate goal of oil and gas drilling is to find hydrocarbon reservoirs, the most important task of oil and gas well logging is to find hydrocarbon displays during the drilling process. During drilling, underground rock is crushed by a drill bit to form rock fragments with the diameter of about 1 cm, and the rock fragments reach the ground continuously while drilling the circulation of well fluid, and the rock fragments are called rock fragments and are also commonly called sand samples, and the rock fragments are the most intuitive materials for timely knowing the lithology and the hydrocarbon reservoir of the stratum.
During the drilling process, geology personnel sample according to certain depth interval, and carry out depth correction according to the late arrival time of rock debris. The method comprises the steps of selecting the obtained mixed samples each time, removing collapsed rock masses, carrying out geological observation, description and name assignment under naked eyes or a microscope, respectively calculating the mass or volume percentage of various rock debris samples, determining the rock category of the sampling depth, matching with other logging information, making an underground rock debris stratum profile, and simultaneously irradiating the rock debris of a key interval by using a fluorescent lamp to identify the oil-gas-containing property of the rock debris, wherein the work is called rock debris logging.
The cost of logging the rock debris is low, and the important function of identifying the lithology and the oil-gas-bearing property of the underground stratum is achieved. The rock debris logging has the advantages of low cost, simplicity, convenience, practicability, timely understanding of underground conditions, strong data systematicness and the like. Therefore, cuttings logging is a very important routine work that must be performed in oil and gas drilling exploration.
However, the existing rock debris logging mainly judges the oil gas display on the surface of the rock debris, and the phenomenon of leaking an oil gas layer can often occur due to the observation capability difference of geological personnel. Meanwhile, due to the pollution of drilling fluid in the drilling process, the information of oil gas on the surface of rock debris is distorted, so that geological personnel can easily misjudge. In addition, the natural gas has high thermal evolution degree, the rock debris of the natural gas layer does not fluoresce under the general condition, and the fluorescent lamp basically loses the effect of identifying the natural gas layer, so that the rock debris is observed by naked eyes to identify the oil gas layer, and the oil gas layer has certain difficulty and inherent defects.
The rock debris mineral often contains a large amount of fluid inclusions in the interior, and the fluid inclusions are original fluid components formed by wrapping fluid in rock pores in the interior of the mineral due to the crystal growth of the mineral during geological evolution and still exist in a fluid state at present. If the formation of the well is involved in a hydrocarbon migration process, the cuttings mineral will contain inclusions of hydrocarbon fluid that record information characteristic of the formation and migration of hydrocarbons. A large number of researches show that in the stratum where oil and gas migration occurs, the rock contains oil and gas components, and the more the content of an oil and gas inclusion is, the higher the content of the oil and gas components in the inclusion is, which indicates that the sample is closer to the oil and gas reservoir or the oil and gas reservoir. Therefore, by analyzing the oil and gas composition characteristics of the oil and gas inclusion in the rock debris, the recognition of the oil and gas display and reservoir formation process can be increased, the oil and gas reservoir is prevented from being leaked out, and the oil and gas reservoir can be accurately identified.
Disclosure of Invention
The invention aims to provide a device for logging by using a rock debris oil gas inclusion, which solves the problem that misjudgment is easily caused by the observation capability of geological personnel or oil gas information distortion in the rock debris logging process in the prior art.
The technical scheme includes that the device for logging by using the rock debris oil gas inclusion comprises a ball mill, wherein a ball mill tank body is connected with a vacuum pump through a first valve, the ball mill tank body is connected with a gas collecting device through a second valve, a gas outlet of the gas collecting device is connected with a gas chromatograph through a third valve, and the gas chromatograph is further connected with a data processing terminal.
Preferably, the ball mill is a planetary ball mill, stainless steel balls in the ball mill are made of tungsten alloy, and the diameter of the stainless steel balls is 5-10 mm.
Preferably, the ball mill is also provided with a temperature adjusting device, and the heating temperature is controlled within 200 ℃.
Preferably, the ball mill is a planetary ball mill and the gas collection device is a quartz glass tube.
The invention also discloses a logging putting method by using the rock debris oil gas inclusion, which comprises the following steps:
step 4, collecting and analyzing the collected gas components and content by using a gas chromatograph;
and 6, judging the oil gas condition wrapped by the rock debris oil gas inclusion based on the gas composition data text and the change curve of the rock debris at different depths, thereby accurately identifying the oil gas-containing horizon.
The concrete method for cleaning the drilling cuttings in the step 1 is as follows: and (3) pouring the drilling rock debris into an organic solvent, cleaning substances adsorbed on the surface of the rock debris, and then cleaning the rock debris for the second time by using distilled water until the rock debris is cleaned.
The organic solvent in step 1 is dichloromethane.
The specific method of the step 2 is as follows:
2.1, selecting dried rock debris particles, filling the rock debris particles into a tank body of a ball mill, connecting the ball mill with a gas collecting device through a gas pipe, connecting a vacuum pump on the ball mill, arranging a first valve between the ball mill and the vacuum pump, arranging a second valve between the ball mill and the gas collecting device, arranging a third valve between the gas collecting device and a gas chromatograph, then opening the first valve and the second valve, closing the third valve, vacuumizing the ball mill and the gas collecting device through the vacuum pump, and waiting until the vacuum degree in the tank body of the ball mill and the vacuum degree in the gas collecting device are lower than 1 × 10-2After Pa, standing for 5-15 minutes, waiting for the ball mill and the gas collection device to maintain a stable vacuum environment, and then closing the first valve;
and 2.2, opening a switch of the ball mill to grind the rock debris, observing the breaking degree of the rock debris through a transparent window, and opening an oil gas inclusion wrapped by the rock debris to fully release fluid in the oil gas inclusion.
The specific method of the step 3 is as follows:
step 3.1, installing a temperature adjusting device on the ball mill, heating the tank body of the ball mill, controlling the heating temperature to be within 200 ℃, and promoting the gas to be heated and discharged from the second valve to the gas collecting device;
and 3.2, after the gas is observed to start to enter the gas collecting device, freezing the gas collecting device by using a liquid nitrogen cooling or air cooling mode, and prompting the gas in the ball mill tank body to automatically enter the gas collecting device and be stored.
The specific method of the step 4 is as follows: and after all the gas enters the gas collecting device, closing the second valve, opening the third valve, closing the switch of the temperature regulating device, unfreezing the gas collecting device, enabling the gas in the gas collecting device to enter a gas chromatograph, and analyzing the components and the content of the gas collected by the gas chromatograph.
The invention has the beneficial effects that:
the device for logging by using the rock debris oil gas inclusion can increase the recognition of oil gas display and avoid the oil gas layer from being leaked, thereby accurately finding the oil gas layer position. The logging method utilizing the rock debris oil gas inclusion is visual and clear in logging profile diagram formed by the method, so that the oil-gas-containing horizon can be accurately found.
Drawings
FIG. 1 is a schematic diagram of an apparatus for logging wells using cuttings oil and gas inclusions in accordance with the present invention;
FIG. 2 is a log of a well utilizing a formation cuttings hydrocarbon inclusion in accordance with the present invention.
In the figure, 1 is a vacuum pump, 2 is a first valve, 3 is a second valve, 4 is a third valve, 5 is a gas chromatograph, 6 is a data processing terminal, 7 is a gas collecting device, and 8 is a ball mill.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection solutions of the present invention are not limited thereto.
A device for logging by using a rock debris oil gas inclusion comprises a ball mill 8, wherein a tank body of the ball mill 8 is connected with a vacuum pump 1 through a first valve 2, a tank body of the ball mill 8 is connected with a gas collecting device 7 through a second valve 3, a gas outlet of the gas collecting device 7 is connected with a gas chromatograph 5 through a third valve 4, and the gas chromatograph 5 is further connected with a data processing terminal 6; the gas collecting device is a quartz glass tube.
The ball mill 8 is a planetary ball mill, stainless steel balls in the ball mill 8 are made of tungsten alloy, and the diameter of the stainless steel balls is 5-10 mm.
The ball mill 8 is also provided with a temperature adjusting device; the temperature regulating device generally adopts an electric heating wire or an induction cooker, and the heating temperature is controlled within 200 ℃.
When the vacuum pump 1 works, the vacuum environment can be kept in the pot body of the ball mill 8 and the gas collector, and the vacuum degree reaches 10- 2Pa; the vacuum pump 1 has the function of ensuring that the whole environment is not interfered by other gases when the ball mill 8 opens the oil gas inclusion in the rock debris each time, so that the hydrocarbon gas components are collected really and accurately.
The ball mill 8 is a planetary ball mill and can grind the rock debris into powder with a diameter of less than 50 um. One end of the ball mill is connected with a vacuum pump 1 through a first valve 2, and the other end of the ball mill is connected with a gas collecting device 7, namely a quartz glass tube, through a second valve 3. The ball mill 8 adopts an inner body made of corundum, the size of the inner volume is based on containing 10-20g of rock debris samples, and the smaller the volume of the inner cavity is, the easier the vacuum pumping is; the stainless steel ball is made of tungsten alloy, and the diameter of the stainless steel ball is 5-10 mm. The temperature regulating device is located on the ball mill pot and can heat the inside of the pot to a maximum temperature of 200 ℃, and the temperature enables the liquid components in the pot to be evaporated and enter the quartz glass tube together with other gases through the second valve 3. In addition, the temperature adjusting device can also desorb gas from the surface of rock debris powder by heating the ball mill tank body, and increase the pressure in the tank body by gas heating to promote the gas to be discharged into the gas collecting device 7, namely a quartz glass tube.
In the working process, after the gas enters the gas collecting device 7, namely the quartz glass tube, the quartz glass tube needs to be cooled by liquid nitrogen cooling or air cooling, so that part of high-temperature gas can be liquefied, the quartz glass tube can be cooled and decompressed, and the gas in the ball mill is promoted to enter the quartz glass tube.
The gas chromatograph 5 is connected with the quartz glass tube through the third valve 4, and can carry out rapid and quantitative test on the collected gas and analyze the components and the content thereof in the rock debris oil gas inclusion.
The data processing terminal 6 mainly functions to perform data processing and production image generation on the gas components and the contents thereof measured by the gas chromatograph 5. The final data result is the gas composition and the content of rock debris at different depths; and the final result image is a hydrocarbon gas content change curve of formations with different depths of the well.
A method for logging by using a rock debris oil gas inclusion comprises the following steps:
the specific method for cleaning the drilling cuttings comprises the following steps: pouring the drilling rock debris into an organic solvent, cleaning substances adsorbed on the surface of the rock debris, and then cleaning the rock debris for the second time by using distilled water until the rock debris is cleaned, wherein the organic solvent is dichloromethane;
2.1, selecting 10-20g of dried rock debris particles, filling the rock debris particles into a tank body of a ball mill 8, connecting the ball mill 8 with the gas collecting device 7 through a gas pipe, connecting a vacuum pump 1 on the ball mill 8, arranging a first valve 2 between the ball mill 8 and the vacuum pump 1, arranging a second valve 3 between the ball mill 8 and the gas collecting device 7, arranging a third valve 4 between the gas collecting device 7 and a gas chromatograph 5, then opening the first valve 2 and the second valve 3, closing the third valve 4, vacuumizing the ball mill 8 and the gas collecting device 7 through the vacuum pump 1, and when the vacuum degree in the tank body of the ball mill 8 and the vacuum degree in the gas collecting device 7 are lower than 1 × 10- 2After Pa, standing for 5-15 minutes, waiting for the ball mill 8 and the gas collecting device 7 to maintain a stable vacuum environment, and then closing the first valve 2;
2.2, opening a switch of the ball mill 8 to grind the rock debris, observing the breaking degree of the rock debris through a transparent window, and opening an oil gas inclusion wrapped by the rock debris to fully release fluid in the oil gas inclusion;
and 3, heating the closed container to ensure that the released fluid is heated and vaporized, and completely discharging the vaporized gas into the gas collecting device 7, wherein the specific method comprises the following steps:
step 3.1, installing a temperature adjusting device on the ball mill 8, heating the tank body of the ball mill 8, controlling the heating temperature to be within 200 ℃, and promoting the gas to be heated and discharged from the second valve 3 to the gas collecting device 7;
3.2, after the gas starts to enter the gas collecting device 7, freezing the gas collecting device 7 by using a liquid nitrogen cooling or air cooling mode, and prompting the gas in the tank body of the ball mill 8 to automatically enter the gas collecting device 7 for storage;
step 4, the specific method for collecting and analyzing the collected gas components and contents by using the gas chromatograph 5 is as follows: after all the gas enters the gas collecting device 7, closing the second valve 3, opening the third valve 4, closing the switch of the temperature regulating device, unfreezing the gas collecting device 7, enabling the gas in the gas collecting device 7 to enter the gas chromatograph 5, and analyzing the components and the content of the gas collected by the gas chromatograph 5;
and 6, judging the oil gas condition wrapped by the rock debris oil gas inclusion based on the gas composition data text and the change curve of the rock debris at different depths, thereby accurately identifying the oil gas-containing horizon.
FIG. 2 is a logging diagram of the rock debris inclusion of the present invention, and the oil and gas inclusion logging technique is a new logging method technique, which can increase the recognition of oil and gas display and avoid missing oil and gas layers, thereby accurately finding the oil and gas-containing layer position. The technology has the advantages of quantitative analysis result, reliable data, high automation degree, and obvious economic and social benefits, and the formed logging profile is visual and clear.
The above-mentioned embodiments are only preferred embodiments of the present invention, and the scope of the present invention is not limited thereto, and any simple modifications or equivalent substitutions of the technical solutions that can be made obvious by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention.
Claims (10)
1. The utility model provides an utilize detritus oil gas inclusion to carry out device of logging, a serial communication port, including ball mill (8), the ball mill (8) jar body is connected with vacuum pump (1) through first valve (2), the ball mill (8) jar body is connected with gas collection device (7) through second valve (3), gas collection device's gas outlet is connected with gas chromatograph (5) through third valve (4), gas chromatograph (5) still are connected with data processing terminal (6).
2. The device for logging by using the rock debris oil gas inclusion as claimed in claim 1, wherein the ball mill (8) is a planetary ball mill, stainless steel balls inside the ball mill (8) are made of tungsten alloy, and the diameter of the stainless steel balls is 5-10 mm.
3. The device for logging by using the rock debris oil and gas inclusion as claimed in claim 1, wherein the ball mill (8) is further provided with a temperature adjusting device, and the heating temperature is controlled within 200 ℃.
4. An apparatus for logging wells using rock debris oil and gas inclusions as defined in claim 1, wherein the ball mill (8) is a planetary ball mill and the gas collection device (7) is a quartz glass tube.
5. A method for logging by using a rock debris oil gas inclusion is characterized by comprising the following steps:
step 1, cleaning and drying drill cuttings;
step 2, putting the dried drilling rock debris into a closed container for crushing, and opening an oil gas inclusion wrapped by the rock debris to fully release fluid in the oil gas inclusion;
step 3, heating the closed container to heat and vaporize the released fluid, and completely discharging the vaporized gas into a gas collecting device (7);
step 4, collecting and analyzing the collected gas components and content by using a gas chromatograph (5);
step 5, performing data processing and result image generation on the gas components and the content thereof tested by the gas chromatograph (5) by using a data processing terminal (6) to form gas composition data texts and variation curves of rock debris at different depths;
and 6, judging the oil gas condition wrapped by the rock debris oil gas inclusion based on the gas composition data text and the change curve of the rock debris at different depths, thereby accurately identifying the oil gas-containing horizon.
6. The method of claim 5, wherein the step 1 of cleaning the drilling cuttings comprises the following steps: and (3) pouring the drilling rock debris into an organic solvent, cleaning substances adsorbed on the surface of the rock debris, and then cleaning the rock debris for the second time by using distilled water until the rock debris is cleaned.
7. The method of claim 6, wherein the organic solvent in step 1 is dichloromethane.
8. The method of claim 5, wherein the step 2 comprises the following steps:
step 2.1, selecting the rock debris particles after drying, loading the rock debris particles into a tank body of a ball mill (8), connecting the ball mill (8) with a gas collecting device (7) through a gas pipe, connecting a vacuum pump (1) on the ball mill (8), installing a first valve (2) between the ball mill (8) and the vacuum pump (1), and installing a second valve (3) between the ball mill (8) and the gas collecting device (7)) A third valve (4) is arranged between the gas collecting device (7) and the gas chromatograph (5), then the first valve (2) and the second valve (3) are opened, the third valve (4) is closed, the ball mill (8) and the gas collecting device (7) are vacuumized by the vacuum pump (1), and when the vacuum degree in the tank body of the ball mill (8) and the vacuum degree in the gas collecting device (7) is lower than 1 × 10-2After Pa, standing for 5-15 minutes, waiting for the ball mill (8) and the gas collection device (7) to maintain a stable vacuum environment, and then closing the first valve (2);
and 2.2, opening a switch of the ball mill (8) to grind the rock debris, observing the breaking degree of the rock debris through a transparent window, and opening oil and gas inclusion wrapped by the rock debris to fully release fluid in the oil and gas inclusion.
9. The method of claim 6, wherein the step 3 comprises the following steps:
step 3.1, installing a temperature adjusting device on the ball mill (8), heating the tank body of the ball mill (8), controlling the heating temperature to be within 200 ℃, and promoting the gas to be heated and discharged from the second valve (3) to a gas collecting device (7);
and 3.2, after the gas is observed to start to enter the gas collecting device (7), freezing the gas collecting device (7) in a liquid nitrogen cooling or air cooling mode, and prompting the gas in the tank body of the ball mill (8) to automatically enter the gas collecting device (7) for storage.
10. The method of claim 6, wherein the step 4 comprises: and after all the gas enters the gas collecting device (7), closing the second valve (3), opening the third valve (4), closing the switch of the temperature regulating device, unfreezing the gas collecting device (7), enabling the gas in the gas collecting device (7) to enter the gas chromatograph (5), and analyzing the components and the content of the gas collected in the gas collecting device (7) by using the gas chromatograph (5).
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| CN110702818A (en) * | 2019-11-08 | 2020-01-17 | 中国石油大学(北京) | Logging device |
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Application publication date: 20200904 |