CN102913204A - Method for building sieve-tube outer gravel-filled natural gas migration passage between gas reservoirs - Google Patents
Method for building sieve-tube outer gravel-filled natural gas migration passage between gas reservoirs Download PDFInfo
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- CN102913204A CN102913204A CN2012104295046A CN201210429504A CN102913204A CN 102913204 A CN102913204 A CN 102913204A CN 2012104295046 A CN2012104295046 A CN 2012104295046A CN 201210429504 A CN201210429504 A CN 201210429504A CN 102913204 A CN102913204 A CN 102913204A
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Abstract
The invention discloses a method for building a sieve-tube outer gravel-filled natural gas migration passage between gas reservoirs, and the method is characterized by comprising the following steps of selecting an appropriate gas reservoir to be developed inside a developed gas field or surrounding the developed gas field at the mid-early state of the development of the developed offshore gas field; locating a drilling ship on an appropriate position of the sea in place to form a construction well; drilling an uncased hole between reservoir sands of the selected gas reservoir to be developed and the production gas reservoir of the developed gas field by utilizing the construction well; loading a sieve tube onto two gas reservoir well sections in the uncased hole; filling gravels into an annular well section between the uncased hole and the sieve tube; and setting a bridge plug above or in front of the annular gravel-filled well section between the uncased hole and the sieve tube to seal. By adopting the development method, the sieve-tube outer gravel-filled artificial natural gas migration passage is conveniently built between the production reservoir sand of the developed gas filed and the selected gas reservoir to be developed, so that economy and efficiency in development of the gas reservoir inside the developed offshore gas field and the peripheral selected gas reservoir to be developed can be realized.
Description
Technical field
The present invention relates to a kind of method of the construction of natural gas fields, specifically a kind of method of between gas reservoir, setting up gravel pack formula gas migration passage exploitation outside the screen casing.
Background technologyDevelop the gas field in the THE WESTERN SOUTH CHINA SEA marine site inner or on every side, had a lot of small-scale gas reservoirs, Abnormal High Pressure Gas Reservoirs, low permeability gas reservoir and height to contain CO
2Gas reservoir not yet drops into exploitation, and its overall reserves are on a grand scale.Because in the selected above-mentioned four kinds of gas reservoirs to be developed of the present invention, but the gas reservoir development gas production reaches less that marine to bore the completion investment relatively high on a small scale; The high and low infiltration gas reservoir development of Abnormal High Pressure Gas Reservoirs exploitation safety requirements grade production capacity is low need many well-diggings and to reservoir transform, height contains CO
2High and the pure hydrocarbon of gas reservoir development requirement for anticorrosion yields poorly, and the marine completion of boring is invested higher; If increase further increase investment of underwater well head at existing offshore production platform external hanging drilling slot or at existing marine subsea production system; And newly-built offshore production platform or subsea production system construction investment are higher, thereby cause above-mentioned four kinds of marine gas reservoir development deficiencies in economic performance or be difficult to economic development.
At present contain CO for the selected small-scale gas reservoir to be developed in sea or Abnormal High Pressure Gas Reservoirs or low permeability gas reservoir or height
2The development approach of gas reservoir is identical with the Determing The Length gas field, namely all adopts conventional offshore production platform exploitation or subsea production system exploitation.Mainly be that at sea production platform or subsea production system bore development well and directly open selected small-scale gas reservoir to be developed or Abnormal High Pressure Gas Reservoirs or low permeability gas reservoir or height and contain CO
2Gas reservoir, selected small-scale gas reservoir to be developed or Abnormal High Pressure Gas Reservoirs or low permeability gas reservoir or height contain CO
2The gas reservoir natural gas contains CO from selected small-scale gas reservoir to be developed or Abnormal High Pressure Gas Reservoirs or low permeability gas reservoir or height under the effect of expansion energy
2Gas reservoir flows to the producing pattern that bores, and passes through the directly extraction of flow string quilt of each producing well.In addition, if will to producing the gas reservoir makeup energy, then also need to bore special Injection Well.
Contain CO for the selected small-scale gas reservoir to be developed in sea or Abnormal High Pressure Gas Reservoirs or low permeability gas reservoir or height
2Gas reservoir, there is following shortcoming in existing gas reservoir development method:
1) newly-built production platform or subsea production system drilling well exploitation, be built into from new production platform or subsea production system and put into production, cycle is long, investment is large, be difficult to realize to the sea developed in the gas field or around it selected small-scale gas reservoir to be developed or Abnormal High Pressure Gas Reservoirs or low permeability gas reservoir or height contain CO
2The economical and effective exploitation of gas reservoir also will cause existing well pattern and the existing production facility of having developed gas field production platform or subsea production system to utilize simultaneously.
2) develop the gas field production platform without residue well slot or subsea production system without the residue underwater well head, also can't adding and hanging well slots or increase underwater well head, or directly develop in the situation that can't realize because of reasons such as economy, technology from built production platform or subsea production system drilling well, selected small-scale gas reservoir to be developed or Abnormal High Pressure Gas Reservoirs or low permeability gas reservoir or height contain CO
2The reserves of gas reservoir can't be employed, and the natural gas resource of national precious will be wasted.
3) developed gas field production platform or subsea production system whether can be used for developing in it or around it selected small-scale gas reservoir to be developed or Abnormal High Pressure Gas Reservoirs or low permeability gas reservoir or height contain CO
2Gas reservoir is subjected to the drillng operation capabilities limits of relative position and the offshore boring island of the former with the latter.
4) Abnormal High Pressure Gas Reservoirs exploitation and height contain CO
2Gas reservoir development is all very high to pressure security class requirement and the requirement for anticorrosion of relevant materials, causes and bores completion and significantly increase of production facility investment, has a strong impact on economic benefit.
Summary of the invention
In order to overcome above-mentioned deficiency, the object of the invention is to provide the method for setting up the outer gravel pack formula artificial natural gas migration pathway of screen casing between a kind of convenience and high-efficiency, the widely used gas reservoir.
To achieve these goals, the technical solution used in the present invention is as follows:
Set up the method for the outer gravel pack formula gas migration passage of screen casing between the gas reservoir, it is characterized in that, comprise the following steps:
1) at sea developed in the gas field development early stage, selecting in the gas field sandstone reservoir physical property to belong to middle and high infiltration is permeability ﹥ 10mD and the more stable production gas reservoir that distributes, produce the sandstone reservoir spatial distribution scope of gas reservoir and the drilling duty of drill ship in conjunction with this simultaneously, at the gas reservoir to be developed of developing in the gas field or selecting around it to be fit to;
2) according to above-mentioned selected gas reservoir to be developed and the spatial relationship of developing gas field production gas reservoir, at sea suitable ground location drill ship in place forms the construction well;
3) utilize the construction well, between selected gas reservoir to be developed and the sandstone reservoir of having developed gas field production gas reservoir, bore bore hole;
4) then in bore hole two gas reservoir well sections be lowered to screen casing;
5) the annular section pack gravel between described bore hole and screen casing;
6) on the annular gravel pack well section between bore hole and the screen casing or before beat bridging plug and carry out packing, namely between two gas reservoirs, set up the artificial migration pathway of gravel pack formula outside the screen casing.
Repeating said steps 3), 4), 5) and 6), setting up gravel pack formula artificial natural gas migration pathway outside a plurality of screen casings in construction in the well.
After described step 5) is finished, the working solution in lower screen casing and the gravel packed well section can be discharged.
Beneficial effect of the present invention: the applications expanding of the inventive method the sea developed in the gas field or its around gas reservoir or Abnormal High Pressure Gas Reservoirs or low permeability gas reservoir or height contain CO on a small scale
2The development approach of gas reservoir because greatly having reduced development cost, can make marine developed or small-scale gas reservoir that it can not employ because of reasons such as economy, technology in the past or Abnormal High Pressure Gas Reservoirs or low permeability gas reservoir or height contain CO on every side in the gas field in
2Gas reservoir is achieved successfully effective exploitation, simultaneously the natural gas resource of national precious is fully utilized, and can improve simultaneously the marine economic benefit of having developed the gas field.Its beneficial effect is embodied in following several respects:
1) can not be subjected to develop the restriction of gas field production platform or subsea production system position, by suitable ground location drill ship in place and drilling well, contain CO developing gas field production Gas Reservoir sand body and selected small-scale gas reservoir to be developed or Abnormal High Pressure Gas Reservoirs or low permeability gas reservoir or height at sea
2Set up the outer gravel pack formula artificial natural gas migration pathway of screen casing between the gas reservoir, both can be and produced the gas reservoir makeup energy, saved to increase and bore that the required investment of facility and operation cost are injected in Injection Well and corresponding ground thereof, the gas reservoir economic recovery is produced in raising, can realize again to the sea developed in the gas field or around it selected small-scale gas reservoir to be developed or Abnormal High Pressure Gas Reservoirs or low permeability gas reservoir or height contain CO
2The economical and effective exploitation of gas reservoir.
2) need not be from production platform or subsea production system drilling well, can reduce drill ship in place with drillng operation difficulty and risk, reduce simultaneously drilling cost.
3) can take full advantage of and developed the existing well pattern that gas field production platform or subsea production system are produced gas reservoir, the outer above well section of gravel pack formula artificial natural gas migration pathway bridging plug of screen casing need not completion, can reduce completion period, the reduction Completion cost.
4) take full advantage of the existing production facility of developing gas field production platform or subsea production system, can save development investment.
5) adopt the outer gravel pack formula artificial natural gas migration pathway of screen casing, can realize relying on the sea to develop gas field production platform or the marine on a small scale gas reservoir of subsea production system exploitation or Abnormal High Pressure Gas Reservoirs or low permeability gas reservoir or height and contain CO
2Gas reservoir neither needs production platform residue well slot and adding and hanging well slots, does not also need subsea production system residue underwater well head or increase underwater well head, does not more need newly-built production platform or subsea production system, can reduce greatly development investment and increase economic efficiency.
Description of drawings
The present invention is described in further detail below in conjunction with accompanying drawing.
Fig. 1 is the structural representation that the present invention develops;
Fig. 2 is the schematic diagram of the outer gravel pack formula gas migration passage of screen casing shown in Figure 1.
Among the figure: 1, selected gas reservoir to be developed; 2, the outer gravel pack formula artificial natural gas migration pathway of screen casing; 3, bridging plug; 4, develop the gas field and produced gas reservoir; 5, construction well; 6, Multilateral Wells; 7, producing well; 8, production platform; 9, drill ship; 10, sea; 11, bore hole; 12, gravel; 13, screen casing.
The specific embodiment
As shown in Figure 1, set up the method for the outer gravel pack formula gas migration passage of screen casing between a kind of gas reservoir, comprise the following steps:
1) at sea developed in the gas field development early stage, selecting in the gas field sandstone reservoir physical property to belong to middle and high infiltration is permeability ﹥ 10mD and the more stable production gas reservoir 4 that distributes, while is produced the sandstone reservoir spatial distribution scope of gas reservoir 4 and the drilling duty of drill ship 9 in conjunction with this, and namely gas reservoir or Abnormal High Pressure Gas Reservoirs or low permeability gas reservoir or height contain CO on a small scale at the gas reservoir to be developed 1 of developing in the gas field or select suitable the present invention to develop around it
2Gas reservoir;
2) namely gas reservoir or Abnormal High Pressure Gas Reservoirs or low permeability gas reservoir or height contain CO on a small scale according to above-mentioned selected gas reservoir to be developed 1
2Gas reservoir and the spatial relationship of developing gas field production gas reservoir 4, at sea suitable ground location drill ship 9 in place forms construction well 5;
3) as shown in Figure 2, utilize construction well 5, namely gas reservoir or Abnormal High Pressure Gas Reservoirs or low permeability gas reservoir or height contain CO on a small scale at selected gas reservoir to be developed 1
2Gas reservoir and developed between the sandstone reservoir that the gas field produces gas reservoir 4 and bored bore hole 11, two gas reservoir well sections are lowered to screen casing 13 in bore hole 11, can the mud stone well section between two gas reservoirs substitute screen casing 13 with blind pipe, last annular section pack gravel 12 between bore hole 11 and screen casing 13 or blind pipe in case of necessity;
4) working solution in lower screen casing and the gravel packed well section can be discharged in case of necessity;
5) on the annular gravel pack well section between bore hole and the screen casing or before beat bridging plug 3 and carry out packing, namely namely gas reservoir or Abnormal High Pressure Gas Reservoirs or low permeability gas reservoir or height contain CO on a small scale with selected gas reservoir to be developed 1 developing sandstone reservoir that the gas field produces gas reservoir 4
2Build up the outer gravel pack formula artificial natural gas migration pathway 2 of screen casing between the gas reservoir;
6) in case of necessity in drill ship 9 non-wiping situations, in construction well 5, can set up a plurality of Multilateral Wells 6, utilize a plurality of Multilateral Wells 6 to bore a plurality of bore holes 11, a plurality of bore holes 11 will develop gas field production gas reservoir 4 or namely gas reservoir or Abnormal High Pressure Gas Reservoirs or low permeability gas reservoir or height contain CO on a small scale with same selected gas reservoir to be developed 1 around it
2The gas reservoir different parts communicates or namely gas reservoir or Abnormal High Pressure Gas Reservoirs or low permeability gas reservoir or height contain CO on a small scale with other a plurality of selected gas reservoirs to be developed 1 around it
2Gas reservoir communicates, two gas reservoir well sections are lowered to screen casing 13 in each bore hole 11, can the mud stone well section between two gas reservoirs substitute screen casing 13 with blind pipe in case of necessity, then the annular section pack gravel 12 between each bore hole 11 and screen casing 13 or blind pipe, working solution in lower screen casing and the gravel packed well section can be discharged in case of necessity, at last on the annular gravel pack well section between each bore hole and the screen casing or before beat bridging plug 3 and carry out packing, namely build up gravel pack formula artificial natural gas migration pathway 2 a plurality of screen casings outside developing between sandstone reservoir that the gas field produces gas reservoir 4 and each selected gas reservoir to be developed, and discarded well 5 and each Multilateral Wells 6 of constructing;
7) in case of necessity, it is in place that drill ship can move on to new correct position, sets up the outer gravel pack formula artificial natural gas migration pathway 2 of new screen casing by above-mentioned steps.
Among the present invention:
The small-scale gas reservoir: refer to the gas reservoir of gas pool reserve small scale, its recoverable reserves is 2.5 hundred million sides～2,500,000,000 sides only.
Abnormal High Pressure Gas Reservoirs: refer to that gas reservoir pressure is higher than hydrostatic pressure, and pressure coefficient is greater than 1.2 gas reservoir.
Low permeability gas reservoir: refer to reservoir properties poor be permeability ﹤ 10 * 10
-3U ㎡, utilize conventional mining type to be difficult to the gas reservoir of effective scale exploitation.
Height contains CO
2Gas reservoir: refer to CO in the natural gas
2The gas reservoir of content ﹥ 50%.
Screen casing: refer in the present invention comprise that general screen casing, high-quality screen casing, calking or cutting seam sieve tube and wire-wrapped screen etc. have the sand control pipe of hole, seam.
Production platform: in the offshore oil and gas field Development and Production, carry out the platform of oil and gas gathering, separation and preliminary treatment.
Subsea production system: refer to substantially be formed by production tree, well head and manifold, control system, control cable, ROV/ROT etc. by the whole series such as underwater well head offshore oil and gas production system of forming of production equipment and seabed pipeline under water.
Drill ship: be provided with drilling equipment, can under mooring location or dynamic positioning state, carry out the ship of Offshore Operation.
The above is preferred embodiment of the present invention, certainly can not limit with this interest field of the present invention.Should be pointed out that for those skilled in the art, technical scheme of the present invention is made amendment or is equal to replacement, do not break away from protection scope of the present invention.
Claims (8)
1. set up the screen casing method of gravel pack formula gas migration passage outward between a gas reservoir, it is characterized in that, comprise the following steps:
1) at sea developed in the gas field development early stage, selecting in the gas field sandstone reservoir physical property to belong to middle and high infiltration is permeability ﹥ 10mD and the more stable production gas reservoir that distributes, produce the sandstone reservoir spatial distribution scope of gas reservoir and the drilling duty of drill ship in conjunction with this simultaneously, at the gas reservoir to be developed of developing in the gas field or selecting around it to be fit to;
2) according to above-mentioned selected gas reservoir to be developed and the spatial relationship of developing gas field production gas reservoir, at sea suitable ground location drill ship in place forms the construction well;
3) utilize the construction well, between selected gas reservoir to be developed and the sandstone reservoir of having developed gas field production gas reservoir, bore bore hole;
4) then in bore hole two gas reservoir well sections be lowered to screen casing;
5) the annular section pack gravel between described bore hole and screen casing;
6) on the annular gravel pack well section between bore hole and the screen casing or before beat bridging plug and carry out packing, namely between two gas reservoirs, set up the artificial migration pathway of gravel pack formula outside the screen casing.
2. set up the method for the outer gravel pack formula gas migration passage of screen casing between the gas reservoir according to claim 1, it is characterized in that: repeating said steps 3), 4), 5) and 6), setting up gravel pack formula artificial natural gas migration pathway outside a plurality of screen casings in construction in the well.
3. set up the method for the outer gravel pack formula gas migration passage of screen casing between the gas reservoir according to claim 1, it is characterized in that: after described step 5) is finished, the working solution in lower screen casing and the gravel packed well section can be discharged.
4. set up the method for the outer gravel pack formula gas migration passage of screen casing between the gas reservoir according to claim 1, it is characterized in that: described screen casing adopts cutting seam sieve tube or punched hole screen pipe or wire-wrapped screen or high-quality screen casing.
5. set up the method for the outer gravel pack formula gas migration passage of screen casing between the gas reservoir according to claim 1, it is characterized in that: described gas reservoir to be developed is recoverable reserves 2.5 hundred million sides～2,500,000,000 sides' small-scale gas reservoir.
6. set up the method for the outer gravel pack formula gas migration passage of screen casing between the gas reservoir according to claim 1, it is characterized in that: described gas reservoir to be developed is that gas reservoir pressure is higher than hydrostatic pressure, and pressure coefficient is greater than 1.2 Abnormal High Pressure Gas Reservoirs.
7. set up the method for the artificial right gas migration pathway in the outer gravel pack formula sky of screen casing between the gas reservoir according to claim 1, it is characterized in that: described gas reservoir to be developed is CO in the natural gas
2The height of content ﹥ 50% contains CO
2Gas reservoir.
8. set up the method for the outer gravel pack formula gas migration passage of screen casing between the gas reservoir according to claim 1, it is characterized in that: described gas reservoir to be developed is reservoir permeability ﹤ 10 * 10
-3The low permeability gas reservoir of u ㎡.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210429504.6A CN102913204B (en) | 2012-11-01 | 2012-11-01 | Method for building sieve-tube outer gravel-filled natural gas migration passage between gas reservoirs |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210429504.6A CN102913204B (en) | 2012-11-01 | 2012-11-01 | Method for building sieve-tube outer gravel-filled natural gas migration passage between gas reservoirs |
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| CN102913204A true CN102913204A (en) | 2013-02-06 |
| CN102913204B CN102913204B (en) | 2014-11-26 |
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2012
- 2012-11-01 CN CN201210429504.6A patent/CN102913204B/en not_active Expired - Fee Related
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1143992A (en) * | 1994-03-10 | 1997-02-26 | 国际壳牌研究有限公司 | Method of producing fluid from earth formation |
| CN1217041A (en) * | 1996-03-12 | 1999-05-19 | 特杰·马格纳森 | Underwater installation and method for building same |
| WO2005003509A1 (en) * | 2003-06-30 | 2005-01-13 | Petroleo Brasileiro S A-Petrobras | Method for, and the construction of, a long-distance well for the production, transport, storage and exploitation of mineral layers and fluids |
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| CN102434129A (en) * | 2011-12-24 | 2012-05-02 | 大连理工大学 | Ultra-deepwater offshore oil-gas engineering developing system and mounting method thereof |
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Granted publication date: 20141126 Termination date: 20201101 |