CN110964564A - Fischer-Tropsch synthesis based drilling fluid base oil and preparation method thereof - Google Patents
Fischer-Tropsch synthesis based drilling fluid base oil and preparation method thereof Download PDFInfo
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- CN110964564A CN110964564A CN201811147287.5A CN201811147287A CN110964564A CN 110964564 A CN110964564 A CN 110964564A CN 201811147287 A CN201811147287 A CN 201811147287A CN 110964564 A CN110964564 A CN 110964564A
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- fischer
- base oil
- tropsch synthesis
- drilling fluid
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G67/00—Treatment of hydrocarbon oils by at least one hydrotreatment process and at least one process for refining in the absence of hydrogen only
- C10G67/02—Treatment of hydrocarbon oils by at least one hydrotreatment process and at least one process for refining in the absence of hydrogen only plural serial stages only
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G2300/00—Aspects relating to hydrocarbon processing covered by groups C10G1/00 - C10G99/00
- C10G2300/10—Feedstock materials
- C10G2300/1022—Fischer-Tropsch products
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G2400/00—Products obtained by processes covered by groups C10G9/00 - C10G69/14
Abstract
A Fischer-Tropsch synthesis base drilling fluid base oil and a preparation method thereof are disclosed, wherein the preparation method comprises the following steps: carrying out cracking isomerization treatment on the Fischer-Tropsch synthesis product; directly fractionating the Fischer-Tropsch synthesis product subjected to cracking isomerization treatment to obtain a base oil product or fractionating the product after hydrofining treatment to obtain the base oil product; wherein the fractionation comprises atmospheric fractionation, and the process conditions of the atmospheric fractionation are as follows: the tower top temperature is 100-. The invention can avoid secondary processing and reduce cost, and the Fischer-Tropsch synthesis base drilling fluid base oil produced by the invention has the advantages of extremely low toxicity, good biodegradability and the like.
Description
Technical Field
The invention belongs to the technical field of chemical industry, and particularly relates to Fischer-Tropsch synthesis based drilling fluid base oil and a preparation method thereof.
Background
Oil-based drilling fluids have been used for decades for drilling oil and gas resources, and base oils such as crude oil and diesel oil used initially are toxic and have low biodegradability, which is obviously unsatisfactory in terms of environmental protection and safety.
The synthetic base drilling fluid can solve the problems that the water-based drilling fluid can not meet the performance requirements of complex conditions under a well, and the oil-based drilling fluid and the white oil-based drilling fluid can not meet the environmental protection requirements.
The drilling fluid system prepared by Zhonghai oilfield service company Limited is applied to Bohai Bay BZ25-1 oilfield A4 well and Indonesian area. The method comprises the steps of cutting a Fischer-Tropsch synthesis specific fraction product into a plurality of fractions by distillation, isomerizing one or more of the obtained fractions, blending the isomerized fractions and the fractions which are not isomerized in proportion, distilling the blended products, and removing low-carbon hydrocarbons which are byproducts of hydroisomerization to obtain a base oil sample for performance test and commercial application. This method is cumbersome and requires two or even more treatments, which increases the cost of manufacture.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides Fischer-Tropsch synthesis base drilling fluid base oil and a preparation method thereof, which can effectively reduce the secondary processing cost and produce novel synthesis base drilling fluid base oil with lower toxicity, good biodegradability, better environmental protection and higher safety.
In order to achieve the purpose, the invention adopts the following technical scheme:
a preparation method of Fischer-Tropsch synthesis based drilling fluid base oil comprises the following steps:
carrying out cracking isomerization treatment on the Fischer-Tropsch synthesis product;
directly fractionating the Fischer-Tropsch synthesis product subjected to cracking isomerization treatment to obtain a base oil product or fractionating the product after hydrofining treatment to obtain the base oil product;
wherein the fractionation comprises atmospheric fractionation, and the process conditions of the atmospheric fractionation are as follows:
the tower top temperature is 100-.
Preferably, the cracking isomerization treatment includes a hydrocracking reaction and a pour point depressing reaction.
Preferably, the operation pressure of the hydrocracking reaction and the pour point depressing reaction is 6-7MPa, and the inlet temperature is 300-350 ℃.
Preferably, the process conditions of the hydrofining treatment are as follows: the pressure is 12-16MPa, the temperature is 200--1The hydrogen-oil ratio is 800-.
Preferably, in the atmospheric fractionation, the bottom extraction temperature is 300-350 ℃.
Preferably, in the atmospheric fractionation, the side draw temperature is 220-.
Preferably, the fractionating further comprises subjecting the remainder of the atmospheric fractionation to vacuum fractionation.
Preferably, the process conditions of the reduced pressure fractionation are: the pressure at the top of the vacuum tower is 4-6KPa, the temperature at the top of the vacuum tower is 70-85 ℃, and the temperature at the side line is reduced by 210 ℃ and 230 ℃. Preferably, the reflux amount is 20000-30000 kg/h.
Preferably, the method further comprises blending the fractions obtained from the fractionation to obtain a blended base oil product.
On the other hand, the invention also provides Fischer-Tropsch synthesis base drilling fluid base oil prepared by the preparation method.
Preferably, the distillation range of the Fischer-Tropsch synthesis based drilling fluid base oil is 150-360 ℃, and the proportion of isoparaffin is more than 60 wt.%.
Preferably, the distillation range of the Fischer-Tropsch synthesis base drilling fluid base oil is 200-330 ℃.
Preferably, the condensation point of the Fischer-Tropsch synthesis base drilling fluid base oil is-10 ℃ to-20 ℃, and the flash point is 90 ℃ to 95 ℃.
Compared with the prior art, the technical scheme of the invention has the following beneficial effects:
the invention provides a method for directly producing Fischer-Tropsch synthesis base drilling fluid base oil, which avoids secondary processing and reduces cost, and the Fischer-Tropsch synthesis base drilling fluid base oil produced by the invention is novel synthesis base drilling fluid base oil which is extremely low in toxicity, good in biodegradability, more environment-friendly and safer, fills up the domestic blank, can be considered to replace the foreign Shell GTL Saraline185V product, is popularized domestically, and has the advantages of low cost, high profit and the like.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to specific embodiments below.
The preparation method of the Fischer-Tropsch synthesis base drilling fluid base oil mainly comprises the steps of subjecting a Fischer-Tropsch product produced by a Fischer-Tropsch synthesis iron-based or cobalt-based catalyst to cracking isomerization treatment, and then directly producing one or more grades of base oil products by a fractionating device, or subjecting the Fischer-Tropsch synthesis product subjected to cracking isomerization treatment to hydrorefining treatment, and then fractionating to obtain the base oil product. In addition, the produced base oil with different brands can be further blended to obtain a blended base oil product.
In one embodiment of the invention, the preparation method of the Fischer-Tropsch synthesis base drilling fluid base oil comprises the following steps: and carrying out cracking isomerization treatment on the Fischer-Tropsch synthesis product, and then fractionating the Fischer-Tropsch synthesis product after the cracking isomerization treatment to obtain a base oil product.
In one embodiment, the cracking isomerization treated catalyst comprises a hydrocracking catalyst and a pour point depressing catalyst developed by the compliance institute. The reaction part of the cracking isomerization treatment comprises two reactors, namely a hydrocracking reactor and a pour point depressing reactor, in order to slow down the local violent heat release caused by the rapid reaction at the top of the reactors, the top of the cracking reactor is simultaneously added with FZC-100, FZC-105, FZC-106 and FZC-204 as protective agents, and the top of the pour point depressing reactor is added with FZC-204 as a protective agent.
The cracking reactor and the pour point depressant reactor are operated at a pressure of 6 to 7MPa, for example 6.2MPa, and an inlet temperature of 300 ℃ to 350 ℃, for example 320 ℃.
The process conditions of the Fischer-Tropsch synthesis product after the cracking isomerization treatment during the hydrofining treatment are 12-16MPa, the temperature is 200 ℃ and 300 ℃, and the airspeed is 0.5-1.5h-1The hydrogen-oil ratio is 800-.
In one embodiment, the hydrofinishing process conditions in the preparation process are: the pressure is 14.5MPa, the temperature is 240 ℃, and the space velocity is 1.0h-1The hydrogen-oil ratio is 1000.
In one embodiment, the fractionating in the manufacturing process comprises atmospheric fractionation, with a furnace exit temperature of the fractionation feed system of 338.8 ℃;
the top temperature of the atmospheric fractionating tower is 106 ℃, the top pressure is 0.07MPa, the top reflux amount is 46952kg/h, the side draw temperature is 180 ℃ in a constant first line, the side draw temperature is 230 ℃ in a constant second line, and the bottom draw temperature is 327.8 ℃.
In another embodiment, the preparation method of the invention further comprises the step of carrying out reduced pressure fractionation on the residue of the atmospheric fractionation, wherein the overhead pressure of a reduced pressure fractionation tower is 5.1Kpa, the overhead temperature is 78.6 ℃, the reflux amount is 23298kg/h, and the side draw temperature is reduced by 220 ℃.
In another embodiment, the preparation method of the invention further comprises the step of blending the normal line, the normal line and the reduced line of the cracking vacuum tower of the fractionating tower into the Fischer-Tropsch synthesis base drilling fluid base oil.
The fraction of the Fischer-Tropsch synthesis base drilling fluid base oil product prepared by the method is 150-360 ℃, more preferably 180-330 ℃, most preferably 200-330 ℃, and the proportion of isoparaffin is more than 60%.
The composition of the fischer-tropsch synthesis based drilling fluid base oil obtained in one embodiment of the invention is shown in table 1.
TABLE 1 compositions of Fischer-Tropsch Synthesis based drilling fluid base oils in the examples
| Carbon number | nC | iC | Total up to |
| C5 | 0.001 | 0.001 | 0.002 |
| C6 | 0.004 | 0.004 | 0.008 |
| C7 | 0.012 | 0.018 | 0.03 |
| C8 | 0.111 | 0.133 | 0.244 |
| C9 | 0.535 | 1.137 | 1.672 |
| C10 | 1.063 | 4.896 | 5.959 |
| C11 | 0.993 | 7.346 | 8.339 |
| C12 | 0.936 | 8.382 | 9.318 |
| C13 | 0.807 | 8.499 | 9.306 |
| C14 | 0.654 | 8.06 | 8.714 |
| C15 | 0.798 | 7.492 | 8.29 |
| C16 | 0.852 | 7.908 | 8.76 |
| C17 | 0.923 | 8.097 | 9.02 |
| C18 | 0.846 | 7.85 | 8.696 |
| C19 | 0.568 | 6.465 | 7.033 |
| C20 | 0.342 | 5.012 | 5.354 |
| C21 | 0.233 | 3.601 | 3.834 |
| C22 | 0.132 | 2.327 | 2.459 |
| C23 | 0.07 | 1.399 | 1.469 |
| C24 | 0.034 | 0.759 | 0.793 |
| C25 | 0.016 | 0.386 | 0.402 |
| C26 | 0.008 | 0.179 | 0.187 |
| C27 | 0.004 | 0.072 | 0.076 |
| C28 | 0.002 | 0.022 | 0.024 |
| C29 | 0.002 | 0.007 | 0.009 |
| C30 | 0.002 | 0.002 | |
| Total up to | 9.946 | 90.054 | 100 |
The property parameters of the Fischer-Tropsch synthesis based drilling fluid base oil are shown in Table 2.
Table 2 Property parameters of Fischer-Tropsch Synthesis based drilling fluid base oils in examples
As shown in Table 3, the Fischer-Tropsch synthesis base drilling fluid base oil has the performance similar to that of the gas oil Saraline185v and has lower biological toxicity.
TABLE 3 comparison of Fischer-Tropsch Synthesis based drilling fluid base oils with gas oil Saraline185v in the examples
| Detecting items | Saraline185v for gas-to-liquid | Fischer-Tropsch synthesis base drilling fluid base oil |
| Flash point | 85 | 93 |
| Pour point | -20 | -20 |
| Biotoxicity | LC5o＝33*104mg/L | LC5o＝66.43*104mg/L |
The method for directly producing the Fischer-Tropsch synthesis base drilling fluid avoids secondary processing, reduces cost, and the produced Fischer-Tropsch synthesis base drilling fluid base oil is novel synthesis base drilling fluid base oil which is extremely low in toxicity, good in biodegradability, more environment-friendly and safer, fills up the domestic blank, can be considered to replace the foreign Shell GTL Saraline185V product, is popularized domestically, and has the advantages of low cost, high profit and the like.
At present, the development of the Fischer-Tropsch industry in China is rapid, and the development of the Fischer-Tropsch synthesis base drilling fluid base oil with excellent performance is a good opportunity.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are only exemplary embodiments of the present invention and are not intended to limit the present invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The preparation method of the Fischer-Tropsch synthesis based drilling fluid base oil is characterized by comprising the following steps:
carrying out cracking isomerization treatment on the Fischer-Tropsch synthesis product;
directly fractionating the Fischer-Tropsch synthesis product subjected to cracking isomerization treatment to obtain a base oil product or fractionating the product after hydrofining treatment to obtain the base oil product;
wherein the fractionation comprises atmospheric fractionation, and the process conditions of the atmospheric fractionation are as follows:
the tower top temperature is 100-.
2. The preparation method according to claim 1, wherein the cracking isomerization treatment comprises hydrocracking reaction and pour point depression reaction, preferably, the operating pressure of the hydrocracking reaction and the pour point depression reaction is 6-7MPa, and the inlet temperature is 300-350 ℃.
3. The preparation method according to claim 1, wherein the process conditions of the hydrofinishing treatment are as follows: the pressure is 12-16MPa, the temperature is 200--1The hydrogen-oil ratio is 800-.
4. The method as claimed in claim 1, wherein the atmospheric fractionation is performed at a bottom extraction temperature of 300-350 ℃ and a side extraction temperature of 220-240 ℃.
5. The method of claim 1, wherein the fractionating further comprises vacuum fractionating a residue of the atmospheric fractionating.
6. The preparation method according to claim 5, wherein the process conditions of the reduced pressure fractionation are as follows: the pressure at the top of the vacuum tower is 4-6KPa, the temperature at the top of the vacuum tower is 70-85 ℃, the reflux amount is 20000-plus 30000kg/h, and the temperature at the side of the vacuum tower is reduced by 210-plus 230 ℃.
7. The method of claim 1, further comprising blending the fractions obtained from the fractionating to obtain a blended base oil product.
8. A fischer-tropsch synthesis based drilling fluid base oil prepared by the method of any one of claims 1 to 7.
9. The Fischer-Tropsch synthesis based drilling fluid base oil according to claim 8, wherein the distillation range of the Fischer-Tropsch synthesis based drilling fluid base oil is 150-360 ℃, preferably 200-330 ℃, and the proportion of isoparaffin is more than 60 wt.%.
10. The Fischer-Tropsch synthesis based drilling fluid base oil of claim 8, wherein the Fischer-Tropsch synthesis based drilling fluid base oil has a congealing point of-10 ℃ to-20 ℃ and a flash point of 90 ℃ to 95 ℃.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1125960A (en) * | 1994-04-01 | 1996-07-03 | 法国石油公司 | Method for the hydroisomerisation processing of feedstocks from the fischer-tropsch process |
| CN103102956A (en) * | 2011-11-10 | 2013-05-15 | 中国石油化工股份有限公司 | Hydrogenation production method for high-viscosity index lubricant base oil |
| US20150076033A1 (en) * | 2013-09-13 | 2015-03-19 | Uop Llc | Process for converting fischer-tropsch liquids and waxes into lubricant base stock and/or transportation fuels |
| CN105713661A (en) * | 2014-12-05 | 2016-06-29 | 中国石油天然气股份有限公司 | Preparation method and applications of drilling fluid base oil |
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- 2018-09-29 CN CN201811147287.5A patent/CN110964564A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1125960A (en) * | 1994-04-01 | 1996-07-03 | 法国石油公司 | Method for the hydroisomerisation processing of feedstocks from the fischer-tropsch process |
| CN103102956A (en) * | 2011-11-10 | 2013-05-15 | 中国石油化工股份有限公司 | Hydrogenation production method for high-viscosity index lubricant base oil |
| US20150076033A1 (en) * | 2013-09-13 | 2015-03-19 | Uop Llc | Process for converting fischer-tropsch liquids and waxes into lubricant base stock and/or transportation fuels |
| CN105713661A (en) * | 2014-12-05 | 2016-06-29 | 中国石油天然气股份有限公司 | Preparation method and applications of drilling fluid base oil |
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Application publication date: 20200407 |