CN102587982B - Underground salt cavern gas storage groups and method for constructing same - Google Patents
Underground salt cavern gas storage groups and method for constructing same Download PDFInfo
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- CN102587982B CN102587982B CN 201210062769 CN201210062769A CN102587982B CN 102587982 B CN102587982 B CN 102587982B CN 201210062769 CN201210062769 CN 201210062769 CN 201210062769 A CN201210062769 A CN 201210062769A CN 102587982 B CN102587982 B CN 102587982B
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Abstract
The invention belongs to the field of development of oil and gas resources, and particularly relates to a method for constructing underground salt cavern gas storage groups. The method for constructing the underground salt cavern gas storage groups includes following steps: (1), determining design values of the widths of ore pillars according to the shapes and the sizes of two adjacent underground salt cavern gas storages; (2), determining relative positions of the two adjacent gas storages in a salt cavern stratum and relative positions of wellheads; (3) completing well drilling and well cementation by the aid of a drill bit with the selected size and a well cementation tubular column with the proper size and the proper structure; (4), mounting an injection and extraction tubular column system and carrying out solution mining cavity making operation; and (5), monitoring and correcting the shape and the size of a salt cavern when cavity making operation is completed by 1/3 and 2/3 respectively, monitoring the shape and the size of the salt cavern when the cavity making operation is completed by 4/5, and reducing cavity making speed until cavity making operation is finished. The design values of the widths of the ore pillars among the underground salt cavern gas storage groups are determined, and the construction method is provided and has excellent high engineering application value and field operability.
Description
Technical field
The invention belongs to the petrol resources exploitation field, particularly, relate to a kind of gas storage cavern group's construction method.
Background technology
In salt hole air reserved storeroom group process of construction, the width of ore pillar can prevent salt hole air reserved storeroom in making chamber and running failure damage to occur between the group of choose reasonable storehouse, the utilization ratio of Effective Raise rock salt resource.If the ore pillar width stays and establishes too greatly, can cause a large amount of rock salt wastings of resources, affect economic effect; Establish too littlely and stay, can make ore pillar produce the kick unstable failure, cause the top board extensive damage of salt cave, may cause whole salt hole air reserved storeroom group to scrap.The ore pillar width design is mainly with reference to engineering experience between present stage gas storage cavern group, do not provide the concrete numerical value of ore pillar width and construction way thereof, and it is larger to cause making in the process of chamber randomness in actual design and molten drench.The designer significantly improves the pillar design width and causes the rock salt waste often in order to guarantee safety.The present invention provides the concrete numerical value of ore pillar size and construction way, improves the operability of pillar design, optimizes the rock salt level of resources utilization, has safely good engineering using value to guaranteeing China's salt hole air reserved storeroom construction.
Summary of the invention
The object of the present invention is to provide a kind of gas storage cavern group's construction method, a difficult problem that exists in pillar design and the construction between solution gas storage cavern group.
Technical scheme of the present invention is as follows:
A kind of gas storage cavern group's construction method comprises and builds a plurality of gas storage caverns, and the stage of construction of adjacent gas storage cavern is as follows:
(1), the volume that calculates respectively two salt hole air reserved storerooms according to design shape and the size of adjacent two gas storage caverns; Be an equivalent circular cylinder that volume is identical with each salt hole air reserved storeroom equivalence, equivalent cylindrical height and diameter ratio are 2: 1, calculate respectively height and the diameter of each equivalent circular cylinder; Ore pillar width design value is the diameter of volume the greater in 1.8～2.2 times of adjacent two equivalent circular cylinders between adjacent two gas storage caverns;
(2), according to ore pillar width design value, target salt rock stratum, salt cave buried depth, salt cave size and dimension between salt hole air reserved storeroom, accurately determine relative position, the well head relative position of adjacent two gas storages in the rock salt stratum; Annotate the gas production parameter according to the gas storage cavern design, determine gas storage cavern natural gas filling air collecting pipe column dimension, completion tubular column size and structure, borehole size, bit size;
(3), utilize the drill bit drilling well of selected size to the gas storage cavern bottom; According to selected completion tubular column size and structure, underground salt hole air reserved storeroom tip position to earth's surface well section is cemented the well, wait solidifying;
(4), molten drench is made the chamber until the construction of salt cave is finished;
Preferably, make the chamber in molten drench respectively and finish 1/3 and at 2/3 o'clock, adopt sonar to survey the chamber technology salt cave size and dimension monitored, when deviation appears in salt cave shape and design load by carrying pipe, changing molten drench and make the chamber mode or add top structure and protect and oily cavity geometry and size are proofreaied and correct; Finished 4/5 o'clock making the chamber, adopt sonar to survey the chamber technology salt cave size and dimension is monitored, reduce and make chamber speed until make the chamber and finish, the salt hole air reserved storeroom shape and size are revised to satisfy design load.
Preferably, top structure protection oil is diesel oil or kerosene or heavy straight-run naphtha.
Preferably, to make the mode in chamber be direct circulation mode or anti-endless form in molten drench.
Preferably, the gas storage cavern height is greater than its diameter, and ratio between two is greater than 1.7.
The ore pillar width is beeline between adjacent two gas storage caverns.
The gas storage cavern group that said method is built comprises a plurality of gas storage caverns, and the ore pillar width is the diameter of volume the greater in 1.8～2.2 times of adjacent two equivalent circular cylinders between adjacent two gas storage caverns; Each equivalent circular cylinder and salt hole air reserved storeroom equal-volume correspondingly, equivalent cylindrical height and diameter ratio are 2: 1.
Emphasis of the present invention has considered that a lot of parameter-definitions are indefinite in salt hole air reserved storeroom pillar design and the work progress, can not accurately construct, and often for the safety that improves ore pillar blindly increases the ore pillar width, has wasted the rock salt resource; Ore pillar width design size that the present invention is clear and definite between the gas storage cavern group has also provided the construction operation method; The present invention has very strong engineering applied value and on-the-spot operability.
Description of drawings
Fig. 1 is adjacent two the salt hole air reserved storeroom structural representations of gas storage cavern faciation;
Among the figure: 1, A gas storage cavern, 2, salt hole air reserved storeroom under the B, 3, A equivalent circular cylinder, 4, B equivalent circular cylinder, 5, ground, 6, the rock salt stratum.
The specific embodiment
The gas storage cavern group comprises a plurality of gas storage caverns, explanation gas storage cavern group's the construction method as an example of adjacent two gas storage caverns example, as shown in Figure 1.
Adjacent two gas storage caverns in the design are called after respectively: salt hole air reserved storeroom 2 under A gas storage cavern 1, the B; Salt hole air reserved storeroom all is designed to the ellipsoid shape under A gas storage cavern, the B; The height of A gas storage cavern and maximum gauge are respectively 112m and 64m, and ratio between two is 1.75, and design volume is 76.3 * 10
4m
3, estimate that making the chamber deadline is 1245 days; The height of salt hole air reserved storeroom and maximum gauge are respectively 128m and 70m under the B, and ratio between two is 1.83, design volume difference 82.5 * 10
4m
3, estimate that making the chamber deadline is 1350 days.The 6 upper and lower bottom surfaces, rock salt stratum, place, salt cave of salt hole air reserved storeroom are respectively 975m and 1156m apart from the distance on ground 5 under A gas storage cavern and the B, and top, salt cave salt depth of stratum is 20m.
The work progress of adjacent two gas storages of gas storage cavern group is as follows:
(1), according to the actual design data as can be known: A gas storage cavern volume is 76.3 * 10
4m
3, the salt hole air reserved storeroom volume is 82.5 * 10 under the B
4m
3Be the identical A equivalent circular cylinder 3 of volume with the equivalence of A gas storage cavern, A equivalent cylindrical height is 2 times of equivalent circular cylinder diameters, calculates: A equivalent circular cylinder diameter and highly being respectively: 49.5m and 99m; Similarly, be the identical B equivalent circular cylinder 4 of volume with salt hole air reserved storeroom equivalence under the B, B equivalent cylindrical height is 2 times of equivalent circular cylinder diameters, calculates: B equivalent circular cylinder diameter and highly being respectively: 50.8m and 101.6m;
(2), the ore pillar width under the adjacent A gas storage cavern, B between salt hole air reserved storeroom is taken as 1.8～2.2 times of the greater in two body diameters, can obtain then that the ore pillar width is 91.44m～111.76m between A, B salt hole air reserved storeroom; Relatively conservative design pillar design width is taken as 112m, and minimum range is 112m between A, B salt hole air reserved storeroom as can be known, and the well head distance is A, B salt cave maximum radius and ore pillar width sum, is 179m;
(3), top, salt hole air reserved storeroom purpose of design layer position buried depth is 975m under the A, B, it is 20m that depth of stratum is reserved at top, salt cave; A, B salt hole air reserved storeroom height are respectively 112m and 128m, can calculate A, top, B salt cave vertical depth is 995m, and the bottom vertical depth is 1107m and 1123m respectively, all less than the maximum buried depth 1156m in salt rock stratum, satisfy the salt hole air reserved storeroom requirement for construction data base;
(4), annotate the gas production designing requirement according to gas storage cavern, natural gas injection-production column jacket external diameter is that 177.8mm, wall thickness 9.19mm, grade of steel are P110, the well cementation conduit external diameter that salt hole air reserved storeroom adopts is 508mm, wall thickness 11.13mm, grade of steel J55, protective casing 339.7mm, wall thickness 9.65mm, grade of steel N80, well cementing casing pipe post external diameter is 244.5mm, wall thickness 10.03mm, grade of steel N80, and the Choice of Bits diameter is followed successively by: 660mm, 444.5mm and 314.1mm;
(5), adopt the drilling well of above-mentioned size drill bit to projected depth, successively be lowered to well cementation conduit, protective casing, well cementing casing pipe and carry out completion, wait solidifyingly, finish completion and well cementation;
(6), the injection-production column jacket system is installed, the chamber is made in molten drench; Injecting top structure protection oil in salt cave A, the B by injection-production column jacket controls salt cave top dissolution velocity and shape;
(7), after salt cave A carries out 415 days (1/3 duration), adopt sonar to survey the chamber technology and for the first time salt cave A shape and size are monitored, can be by carrying pipe, changing molten drench and make the chamber mode or add top structure and protect and oily cavity geometry is proofreaied and correct when deviation appears in salt cave shape and design load; After salt cave B carries out 450 days (1/3 duration), adopt sonar to survey the chamber technology and for the first time salt cave B shape and size are monitored, can be by carrying pipe, changing molten drench and make the chamber mode or add top structure and protect and oily cavity geometry is proofreaied and correct when deviation appears in salt cave shape and design load; After salt cave A carries out 830 days (2/3 duration), adopt sonar to survey the chamber technology and for the second time salt cave A shape and size are monitored, can be by carrying pipe, changing molten drench and make the chamber mode or add top structure and protect and oily cavity geometry is proofreaied and correct when deviation appears in salt cave shape and design load; After salt cave B carries out 900 days (2/3 duration), adopt sonar to survey the chamber technology and for the second time salt cave B shape and size are monitored, can be by carrying pipe, changing molten drench and make the chamber mode or add top structure and protect and oily cavity geometry is proofreaied and correct when deviation appears in salt cave shape and design load;
(8), after salt cave A carries out 996 days (4/5 duration), adopt sonar to survey the chamber technology and for the third time salt cave A shape and size are monitored, can be by carrying pipe, changing molten drench and make the chamber mode or add top structure and protect and oily cavity geometry is proofreaied and correct when deviation appears in salt cave shape and design load; After salt cave B carries out 1080 days (4/5 duration), adopt sonar to survey the chamber technology and for the third time salt cave B shape and size are monitored, can be by carrying pipe, changing molten drench and make the chamber mode or add top structure and protect and oily cavity geometry is proofreaied and correct when deviation appears in salt cave shape and design load; Reduce that to make chamber speed be original 1/2 until make the chamber and finish.
To make the chamber mode be direct circulation mode or anti-endless form in molten drench in the present embodiment; Top structure protection oil is diesel oil or kerosene or heavy straight-run naphtha.
By that analogy, carry out the construction of other gas storage cavern, finish whole gas storage cavern group's construction.
Claims (17)
1. a gas storage cavern group construction method comprises and builds a plurality of gas storage caverns, and the stage of construction of adjacent gas storage cavern is as follows:
(1), the volume that calculates respectively two salt hole air reserved storerooms according to design shape and the size of adjacent two gas storage caverns; Be an equivalent circular cylinder that volume is identical with each salt hole air reserved storeroom equivalence, equivalent cylindrical height and diameter ratio are 2:1, calculate respectively height and the diameter of each equivalent circular cylinder; Ore pillar width design value is the diameter of volume the greater in 1.8～2.2 times of adjacent two equivalent circular cylinders between adjacent two gas storage caverns;
(2), according to ore pillar width design value, target salt rock stratum, salt cave buried depth, salt cave size and dimension between salt hole air reserved storeroom, accurately determine relative position, the well head relative position of adjacent two gas storages in the rock salt stratum; Annotate the gas production parameter according to the gas storage cavern design, determine gas storage cavern natural gas filling air collecting pipe column dimension, completion tubular column size and structure, borehole size, bit size;
(3), utilize the drill bit drilling well of selected size to the gas storage cavern bottom; According to selected completion tubular column size and structure, underground salt hole air reserved storeroom tip position to earth's surface well section is cemented the well, wait solidifying;
(4), molten drench is made the chamber until the construction of salt cave is finished.
2. a kind of gas storage cavern group's according to claim 1 construction method, it is characterized in that: make the chamber in molten drench respectively and finish 1/3 and at 2/3 o'clock, adopt sonar to survey the chamber technology salt cave size and dimension monitored, when deviation appears in salt cave shape and design load by carrying pipe, changing molten drench and make the chamber mode or add top structure and protect and oily cavity geometry and size are proofreaied and correct; Finished 4/5 o'clock making the chamber, adopt sonar to survey the chamber technology salt cave size and dimension is monitored, reduce and make chamber speed until make the chamber and finish, the salt hole air reserved storeroom shape and size are revised to satisfy design load.
3. a kind of gas storage cavern group's according to claim 2 construction method is characterized in that: top structure protection oil is diesel oil, kerosene or heavy straight-run naphtha.
4. a kind of gas storage cavern group's according to claim 1 and 2 construction method, it is characterized in that: the mode that the chamber is made in molten drench is direct circulation mode or anti-endless form.
5. a kind of gas storage cavern group's according to claim 3 construction method, it is characterized in that: the mode that the chamber is made in molten drench is direct circulation mode or anti-endless form.
6. a kind of gas storage cavern group's according to claim 1 and 2 construction method, it is characterized in that: the gas storage cavern height is greater than its diameter, and ratio between two is greater than 1.7.
7. a kind of gas storage cavern group's according to claim 3 construction method, it is characterized in that: the gas storage cavern height is greater than its diameter, and ratio between two is greater than 1.7.
8. a kind of gas storage cavern group's according to claim 4 construction method, it is characterized in that: the gas storage cavern height is greater than its diameter, and ratio between two is greater than 1.7.
9. a kind of gas storage cavern group's according to claim 5 construction method, it is characterized in that: the gas storage cavern height is greater than its diameter, and ratio between two is greater than 1.7.
10. the gas storage cavern group that builds of construction method according to claim 1 and 2, comprise a plurality of gas storage caverns, it is characterized in that: the ore pillar width is the diameter of volume the greater in 1.8～2.2 times of adjacent two equivalent circular cylinders between adjacent two gas storage caverns; Each equivalent circular cylinder and corresponding salt hole air reserved storeroom equal-volume, equivalent cylindrical height and diameter ratio are 2:1.
11. the gas storage cavern group that construction method according to claim 3 is built, comprise a plurality of gas storage caverns, it is characterized in that: the ore pillar width is the diameter of volume the greater in 1.8～2.2 times of adjacent two equivalent circular cylinders between adjacent two gas storage caverns; Each equivalent circular cylinder and corresponding salt hole air reserved storeroom equal-volume, equivalent cylindrical height and diameter ratio are 2:1.
12. the gas storage cavern group that construction method according to claim 4 is built, comprise a plurality of gas storage caverns, it is characterized in that: the ore pillar width is the diameter of volume the greater in 1.8～2.2 times of adjacent two equivalent circular cylinders between adjacent two gas storage caverns; Each equivalent circular cylinder and corresponding salt hole air reserved storeroom equal-volume, equivalent cylindrical height and diameter ratio are 2:1.
13. the gas storage cavern group that construction method according to claim 5 is built, comprise a plurality of gas storage caverns, it is characterized in that: the ore pillar width is the diameter of volume the greater in 1.8～2.2 times of adjacent two equivalent circular cylinders between adjacent two gas storage caverns; Each equivalent circular cylinder and corresponding salt hole air reserved storeroom equal-volume, equivalent cylindrical height and diameter ratio are 2:1.
14. the gas storage cavern group that construction method according to claim 6 is built, comprise a plurality of gas storage caverns, it is characterized in that: the ore pillar width is the diameter of volume the greater in 1.8～2.2 times of adjacent two equivalent circular cylinders between adjacent two gas storage caverns; Each equivalent circular cylinder and corresponding salt hole air reserved storeroom equal-volume, equivalent cylindrical height and diameter ratio are 2:1.
15. the gas storage cavern group that construction method according to claim 7 is built, comprise a plurality of gas storage caverns, it is characterized in that: the ore pillar width is the diameter of volume the greater in 1.8～2.2 times of adjacent two equivalent circular cylinders between adjacent two gas storage caverns; Each equivalent circular cylinder and corresponding salt hole air reserved storeroom equal-volume, equivalent cylindrical height and diameter ratio are 2:1.
16. the gas storage cavern group that construction method according to claim 8 is built, comprise a plurality of gas storage caverns, it is characterized in that: the ore pillar width is the diameter of volume the greater in 1.8～2.2 times of adjacent two equivalent circular cylinders between adjacent two gas storage caverns; Each equivalent circular cylinder and corresponding salt hole air reserved storeroom equal-volume, equivalent cylindrical height and diameter ratio are 2:1.
17. the gas storage cavern group that construction method according to claim 9 is built, comprise a plurality of gas storage caverns, it is characterized in that: the ore pillar width is the diameter of volume the greater in 1.8～2.2 times of adjacent two equivalent circular cylinders between adjacent two gas storage caverns; Each equivalent circular cylinder and corresponding salt hole air reserved storeroom equal-volume, equivalent cylindrical height and diameter ratio are 2:1.
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102587981B (en) * | 2012-03-12 | 2012-12-05 | 中国石油大学(华东) | Underground salt cavern gas storage and building method thereof |
| CN102828778B (en) * | 2012-09-24 | 2014-11-05 | 重庆大学 | Complex salt rock underground and water dissolution joint cavity construction method |
| CN106246223A (en) * | 2016-10-17 | 2016-12-21 | 中国石油天然气股份有限公司勘探开发研究院廊坊分院 | A kind of for making chamber control method containing heavy parting salt deposit |
| CN106523029A (en) * | 2016-10-26 | 2017-03-22 | 重庆大学 | Transformation method for irregular salt cavern |
| CN108561183A (en) * | 2018-04-09 | 2018-09-21 | 重庆大学 | Self-advancing type rotating jet horizontal well makes cavity method |
| CN110344810B (en) * | 2019-07-18 | 2020-09-15 | 中国科学院武汉岩土力学研究所 | Method for establishing horizontal cavity of rock salt layer gas storage |
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| CN1676880A (en) * | 2005-04-20 | 2005-10-05 | 太原理工大学 | Rock salt deposit horizontal chamber type oil-gas depot and its building method |
| US7097386B2 (en) * | 2003-11-13 | 2006-08-29 | Freeport-Mcmoran Energy Llc | Simultaneous development of underground caverns and deposition of materials |
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2012
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Patent Citations (4)
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|---|---|---|---|---|
| US5431482A (en) * | 1993-10-13 | 1995-07-11 | Sandia Corporation | Horizontal natural gas storage caverns and methods for producing same |
| DE10117617A1 (en) * | 2001-04-07 | 2002-10-10 | Ruhrgas Ag | System for storing fluid in underground hollow chamber comprises storage chamber for displacement fluid formed as underground hollow chamber |
| US7097386B2 (en) * | 2003-11-13 | 2006-08-29 | Freeport-Mcmoran Energy Llc | Simultaneous development of underground caverns and deposition of materials |
| CN1676880A (en) * | 2005-04-20 | 2005-10-05 | 太原理工大学 | Rock salt deposit horizontal chamber type oil-gas depot and its building method |
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