CN104265367A - Salt cavern gas storage cavity bottom communicated water discharge method - Google Patents
Salt cavern gas storage cavity bottom communicated water discharge method Download PDFInfo
- Publication number
- CN104265367A CN104265367A CN201410354131.XA CN201410354131A CN104265367A CN 104265367 A CN104265367 A CN 104265367A CN 201410354131 A CN201410354131 A CN 201410354131A CN 104265367 A CN104265367 A CN 104265367A
- Authority
- CN
- China
- Prior art keywords
- well
- horizontal well
- open hole
- water
- cavity
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F17/00—Methods or devices for use in mines or tunnels, not covered elsewhere
- E21F17/16—Modification of mine passages or chambers for storage purposes, especially for liquids or gases
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F16/00—Drainage
Abstract
The invention provides a salt cavern gas storage cavity bottom communicated water discharge method, which mainly comprises the following steps that: an open hole well is drilled on the stratum; casing running is performed at a well opening for well cementing; a middle pipe and a center pipe are arranged in a casing pipe; fresh water is injected through the center pipe, and a cavity is formed; an L-shaped horizontal well is drilled on the stratum beside the open hole well; a horizontal well casing pipe is installed from a well opening of the horizontal well, and cell cementing is performed; a water discharge pipe is arranged in the casing pipe; open holes are formed in the horizontal well casing pipe and the water discharge pipe in an intersection position of the bottom of the horizontal well and one or a plurality of open hole wells and are communicated with the cavity of the open hole well; natural gas is injected from an annular space formed between the center pipe and the middle pipe of the open hole well; when the gas-water interface is above a lower opening of the center pipe, the water is discharged onto the ground through the center pipe and/or the water discharge pipe arranged in the horizontal well; and when the gas-water interface is below the lower opening of the center pipe, the water is discharged onto the ground through the water discharge pipe arranged in the horizontal well. If the two adjacent cavities are independently used, a horizontal well packer is arranged in a horizontal well section connecting the bottoms of the two cavities. The method provided by the invention has the advantages that the process is simple; the water in the cavities can be totally discharged; and the gas storage capacity is sufficiently utilized.
Description
Technical field
The present invention relates to natural gas storage technology.
Background technology
In order to solve the contradiction between the constancy of natural gas upstream supply and the fluctuation of downstream Natural Gas Demand, all select to set up gas storage near area of consumption.Salt hole air reserved storeroom is exactly main one.Salt hole air reserved storeroom construction and operation method are: drilling well in saliferous strata, and inject fresh water dissolution and fall rock salt and form cave, natural gas injection draining, finally note adopts natural gas.
In the process in the molten chamber of water filling, the salt in stratum is dissolved in water, be then discharged to ground separated fall; Water-fast mineral in stratum, drop to cavity bottom by Action of Gravity Field and form talus, sometimes put up a bridge at the venturi place of cavity to be formed and block.In the process of gas injection draining, only have the central tube for draining to insert underwater and just can carry out.Because central tube can not insert talus and water lower than central nozzle cannot go out, the water below the intrapore water of the water of lower around the mouth of pipe, talus and talus in cavity cannot be discharged, large losses storage capacity.Even if use sieve tube completion technique, because screen casing intensity is lower, often there is the situations such as screen casing distortion, fracture, under central tube is also frequent not on earth.
In order to make full use of storage capacity, need a kind of by the technology of whole for water in cavity emptying.
Summary of the invention
The object of the present invention is to provide a kind of technique simple, can communicated drainage method at the bottom of the salt hole air reserved storeroom chamber of whole emptying by the water in cavity.
Realize the water in cavity all to discharge and must realize: (1) discharge line is connected at the bottom of chamber; (2) discharge line is unobstructed and do not reveal; (3), when the flow resistance of air water in talus is larger, dredging measure is had.
In order to achieve the above object, the technical solution used in the present invention is as follows:
Open hole well is bored on stratum, cement the well at open hole well well head setting of casing, in open hole well sleeve pipe, establish intervalve and in the bottom of this intervalve and sleeve pipe, packer is installed, central tube is established in intervalve, inject fresh water by this central tube, dissolve the borehole wall of open hole well, salt solution is discharged to ground from the annular space of intervalve and central tube, insoluble chip sinks to forming talus, finally forms cavity.Bore L shape horizontal well on the stratum on open hole well side, the bottom of this horizontal well is crossing with a bite or many mouthfuls of open hole wells; Horizontal well casing pipe under horizontal well well head is also cemented the well, in horizontal well casing pipe, be provided with gutter, above-mentioned horizontal well casing pipe with intersection at the bottom of open hole well and gutter is provided with perforate, horizontal well casing pipe is communicated with open hole well cavity with gutter.If poor connectivity, water can be injected from the gutter in horizontal well, horizontal well is communicated with open hole well cavity top.Natural gas is injected from the annular space of open hole well intervalve and central tube, by gravity fractionation, natural gas is on cavity top, water is in cavity bottom, form gas-water interface face, when gas-water interface face is more than central tube end opening, water can be discharged to ground by the gutter in central tube and/or horizontal well; During in gas-water interface face below central tube end opening, water can be discharged to ground by the gutter in horizontal well.If adjacent two cavitys independently use, in the net horizontal section of connection two cavity bottoms, establish horizontal well packer, if adjacent two open hole well cavity conbined usage, then horizontal well packer is established in the net horizontal section inside noting be used in connection two cavity bottoms.
Described horizontal well can also use as monitor well, for monitoring the leakage of natural gas in cavity.
The present invention compared with prior art tool has the following advantages: technique is simple, can whole emptying by the water in cavity, maximally utilises gas storage storage capacity.
Accompanying drawing explanation
Fig. 1 is communicated drainage structural representation sketch at the bottom of salt hole air reserved storeroom chamber of the present invention.
In figure: 1-stratum, 2-cavity, 3-natural gas, 4-water, 5-talus, 6-sleeve pipe, 7-intervalve, 8-packer, 9-intervalve, 10-open hole well, 11-horizontal well casing pipe, 12-gutter, 13-horizontal well packer, 14-hole.
Detailed description of the invention
In communicated drainage structural representation at the bottom of the salt hole air reserved storeroom chamber shown in Fig. 1, stratum 1 is bored open hole well 10, cement the well at open hole well well head setting of casing 6, in open hole well sleeve pipe, establish intervalve 7 and in the bottom of this intervalve and sleeve pipe, packer 8 is installed, in intervalve, establishing central tube 9, injecting fresh water by this central tube, dissolve the borehole wall of open hole well, salt solution is discharged to ground from the annular space of intervalve and central tube, and insoluble chip sinks to forming talus 5, finally forms cavity 2.Bore L shape horizontal well on the stratum on open hole well side, the bottom of this horizontal well is crossing with a bite or many mouthfuls of open hole wells; Horizontal well casing pipe 11 under horizontal well well head is also cemented the well, and is provided with gutter 12 in horizontal well casing pipe, above-mentioned horizontal well casing pipe with intersection at the bottom of open hole well and gutter is provided with perforate 14, horizontal well casing pipe is communicated with open hole well cavity with gutter.If poor connectivity, water can be injected from the gutter in horizontal well, horizontal well is communicated with open hole well cavity top.Natural gas 3 is injected from the annular space of open hole well intervalve and central tube, by gravity fractionation, natural gas is on cavity top, water 4 is in cavity bottom, and form liquid-gas interface, when gas-water interface face is more than central tube end opening, water can be discharged to ground by the gutter in central tube and/or horizontal well; During in gas-water interface face below central tube end opening, water can be discharged to ground by the gutter in horizontal well.If adjacent two cavitys independently use, in the net horizontal section of connection two cavity bottoms, establish horizontal well packer 13, if adjacent two open hole well cavity conbined usage, then horizontal well packer is established in the net horizontal section inside noting be used in connection two cavity bottoms.Above-mentioned horizontal well can also use as monitor well, for monitoring the leakage of natural gas in cavity.
Claims (2)
1. communicated drainage method at the bottom of a salt hole air reserved storeroom chamber, it is characterized in that: on stratum, bore open hole well, cement the well at open hole well well head setting of casing, in open hole well sleeve pipe, establish intervalve and in the bottom of this intervalve and sleeve pipe, packer is installed, in intervalve, establishing central tube, injecting fresh water by this central tube, dissolve the borehole wall of open hole well, salt solution is discharged to ground from the annular space of intervalve and central tube, and insoluble chip sinks to forming talus, finally forms cavity; L shape horizontal well is bored on the stratum on open hole well side, the bottom of this horizontal well is crossing with a bite or many mouthfuls of open hole wells, horizontal well casing pipe under horizontal well well head is also cemented the well, gutter is provided with in horizontal well casing pipe, above-mentioned horizontal well casing pipe with intersection at the bottom of open hole well and gutter are provided with perforate, horizontal well casing pipe are communicated with open hole well cavity with gutter, if poor connectivity, water can be injected from the gutter in horizontal well, horizontal well is communicated with open hole well cavity top; Natural gas is injected from the annular space of open hole well intervalve and central tube, natural gas is on cavity top, and water, in cavity bottom, forms gas-water interface face, when gas-water interface face is more than central tube end opening, water can be discharged to ground by the gutter in central tube and/or horizontal well; During in gas-water interface face below central tube end opening, water can be discharged to ground by the gutter in horizontal well; If adjacent two cavitys independently use, in the net horizontal section of connection two cavity bottoms, establish horizontal well packer, if adjacent two open hole well cavity conbined usage, then horizontal well packer is established in the net horizontal section inside noting be used in connection two cavity bottoms.
2. communicated drainage method at the bottom of salt hole air reserved storeroom chamber according to claim 1, is characterized in that: described horizontal well can also use as monitor well, for monitoring the leakage of natural gas in cavity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410354131.XA CN104265367A (en) | 2014-07-24 | 2014-07-24 | Salt cavern gas storage cavity bottom communicated water discharge method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410354131.XA CN104265367A (en) | 2014-07-24 | 2014-07-24 | Salt cavern gas storage cavity bottom communicated water discharge method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104265367A true CN104265367A (en) | 2015-01-07 |
Family
ID=52156925
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410354131.XA Pending CN104265367A (en) | 2014-07-24 | 2014-07-24 | Salt cavern gas storage cavity bottom communicated water discharge method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104265367A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105257338A (en) * | 2015-10-10 | 2016-01-20 | 中国石油天然气股份有限公司 | Gas storage reservoir salt cavern vertical segmented cavity dissolving method |
| CN106481360A (en) * | 2016-05-11 | 2017-03-08 | 江苏井神盐化股份有限公司 | Salt cave Tank Process quickly built by a kind of asymmetric halogen of adopting of twin-well |
| CN108087024A (en) * | 2017-12-13 | 2018-05-29 | 中盐勘察设计院有限公司 | A kind of method of construction of tunnel type salt cave storage cavern |
| CN109838279A (en) * | 2017-11-24 | 2019-06-04 | 江苏苏盐井神股份有限公司 | A method of salt cave storage cavern utilization rate is improved from bottom of chamber row's halogen using connected well |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5431482A (en) * | 1993-10-13 | 1995-07-11 | Sandia Corporation | Horizontal natural gas storage caverns and methods for producing same |
| CN101368477A (en) * | 2008-10-06 | 2009-02-18 | 中国科学院武汉岩土力学研究所 | Oil-water interface inspection and control method |
| CN101881151A (en) * | 2010-07-02 | 2010-11-10 | 太原理工大学 | Rapid solution construction method for rock salt cavity |
| CN102587981A (en) * | 2012-03-12 | 2012-07-18 | 中国石油大学(华东) | Underground salt cavern gas storage and building method thereof |
| CN102720538A (en) * | 2012-07-06 | 2012-10-10 | 中国石油大学(华东) | Inverted-pear-shaped underground salt cavern gas storage field and establishing method thereof |
-
2014
- 2014-07-24 CN CN201410354131.XA patent/CN104265367A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5431482A (en) * | 1993-10-13 | 1995-07-11 | Sandia Corporation | Horizontal natural gas storage caverns and methods for producing same |
| CN101368477A (en) * | 2008-10-06 | 2009-02-18 | 中国科学院武汉岩土力学研究所 | Oil-water interface inspection and control method |
| CN101881151A (en) * | 2010-07-02 | 2010-11-10 | 太原理工大学 | Rapid solution construction method for rock salt cavity |
| CN102587981A (en) * | 2012-03-12 | 2012-07-18 | 中国石油大学(华东) | Underground salt cavern gas storage and building method thereof |
| CN102720538A (en) * | 2012-07-06 | 2012-10-10 | 中国石油大学(华东) | Inverted-pear-shaped underground salt cavern gas storage field and establishing method thereof |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105257338A (en) * | 2015-10-10 | 2016-01-20 | 中国石油天然气股份有限公司 | Gas storage reservoir salt cavern vertical segmented cavity dissolving method |
| CN106481360A (en) * | 2016-05-11 | 2017-03-08 | 江苏井神盐化股份有限公司 | Salt cave Tank Process quickly built by a kind of asymmetric halogen of adopting of twin-well |
| CN109838279A (en) * | 2017-11-24 | 2019-06-04 | 江苏苏盐井神股份有限公司 | A method of salt cave storage cavern utilization rate is improved from bottom of chamber row's halogen using connected well |
| CN109838279B (en) * | 2017-11-24 | 2021-04-13 | 江苏苏盐井神股份有限公司 | Method for improving salt cavern storage utilization rate by discharging brine from cavity bottom through communicating well |
| CN108087024A (en) * | 2017-12-13 | 2018-05-29 | 中盐勘察设计院有限公司 | A kind of method of construction of tunnel type salt cave storage cavern |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107401393B (en) | Drainage and gas production integrated goaf gas extraction well body structure and construction method thereof | |
| CN108661618B (en) | Reservoir transformation method for L type horizontal well of coal bed gas | |
| CN104790951B (en) | Weaken the method and device away from the high-order tight roofs of 100 ~ 350m of coal seam | |
| CN110397428B (en) | Displacement coalbed methane yield increasing method for coalbed methane jointly mined by vertical well and U-shaped butt well | |
| CN109838279B (en) | Method for improving salt cavern storage utilization rate by discharging brine from cavity bottom through communicating well | |
| CN105986795B (en) | Coal bed gas horizontal well coal seam remodeling method | |
| CN102392677A (en) | Permeability improvement technology for coal bed gas reservoir cap by using three-dimensional fracture network modification | |
| CN104806217A (en) | Combined separated layer fracturing, grouping and layer-combining mining method for coal bed well group | |
| CN108301866B (en) | Mining of closed distance coal seam group adjacent layer gas pressure relief directional drilling stops pumping method | |
| CN104131831A (en) | Coal-bed gas well vertical three-dimensional united extraction method | |
| CN103195468A (en) | System process for conducting efficient strengthened extraction in surrounding rock | |
| CN105484719A (en) | Method for improving multi-cluster crack initiation effectiveness by blocking seams through multi-scale soluble balls | |
| CN104265367A (en) | Salt cavern gas storage cavity bottom communicated water discharge method | |
| CN104695923A (en) | Method for realizing sectional multi-cluster fracture of horizontal well by adopting soluble balls | |
| CN105804786B (en) | A kind of weak seam bottom plate layer-through drilling pressure rushes anti-reflection method | |
| CN110748380B (en) | Method for building salt cavern gas storage | |
| PL237727B1 (en) | Indexes of structural differentiation of upper zones of Ordovician limestone filling and method to determine it | |
| CN104594870A (en) | Fracturing stimulation method | |
| CN103912304A (en) | Method for locally extracting gas of soft coal seams | |
| CN102877824A (en) | Horizontal well staged and multi-cluster fracturing method by hydraulic jetting | |
| CN105649625B (en) | A kind of high-low pressure subregion fracturing anatonosis formula coal-bed flooding method | |
| CN108301769B (en) | A kind of RW type horizontal well construction method and its drilling tool used | |
| CN207728393U (en) | The casing programme of chamber is made for salt hole air reserved storeroom | |
| Xiumin et al. | Research and application of gas-lift reverse circulation drilling technology to geothermal well construction in Dalian Jiaoliu Island | |
| CN106223898B (en) | Two horizontal well cementing and completion integrated pipe column devices that open |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150107 |