CN112282720B - Site construction method of fishbone well and corresponding matched equipment - Google Patents
Site construction method of fishbone well and corresponding matched equipment Download PDFInfo
- Publication number
- CN112282720B CN112282720B CN202011300763.XA CN202011300763A CN112282720B CN 112282720 B CN112282720 B CN 112282720B CN 202011300763 A CN202011300763 A CN 202011300763A CN 112282720 B CN112282720 B CN 112282720B
- Authority
- CN
- China
- Prior art keywords
- fishbone
- well
- determining
- pipe
- construction method
- 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.)
- Active
Links
- 238000010276 construction Methods 0.000 title claims abstract description 54
- 241000251468 Actinopterygii Species 0.000 claims abstract description 22
- 238000005553 drilling Methods 0.000 claims abstract description 21
- 210000002445 nipple Anatomy 0.000 claims abstract description 20
- 208000008558 Osteophyte Diseases 0.000 claims abstract description 12
- 238000000034 method Methods 0.000 claims abstract description 12
- 239000012530 fluid Substances 0.000 claims abstract description 11
- 201000010934 exostosis Diseases 0.000 claims abstract description 10
- 238000011161 development Methods 0.000 claims abstract description 9
- 238000005086 pumping Methods 0.000 claims abstract description 7
- 230000008859 change Effects 0.000 claims abstract description 5
- 238000009434 installation Methods 0.000 claims abstract description 5
- 239000002689 soil Substances 0.000 claims abstract description 5
- 230000001105 regulatory effect Effects 0.000 claims abstract description 4
- 239000004576 sand Substances 0.000 claims description 13
- 230000000903 blocking effect Effects 0.000 claims description 12
- 210000000988 bone and bone Anatomy 0.000 claims description 12
- 230000015572 biosynthetic process Effects 0.000 claims description 10
- 239000002002 slurry Substances 0.000 claims description 4
- 238000011065 in-situ storage Methods 0.000 claims description 3
- 230000035699 permeability Effects 0.000 claims description 2
- 239000000725 suspension Substances 0.000 claims 1
- 230000001965 increasing effect Effects 0.000 abstract description 6
- 239000002253 acid Substances 0.000 description 13
- 239000007788 liquid Substances 0.000 description 8
- NMJORVOYSJLJGU-UHFFFAOYSA-N methane clathrate Chemical compound C.C.C.C.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O NMJORVOYSJLJGU-UHFFFAOYSA-N 0.000 description 7
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 6
- 238000012986 modification Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 238000006073 displacement reaction Methods 0.000 description 3
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000035515 penetration Effects 0.000 description 3
- 238000004537 pulping Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 239000000654 additive Substances 0.000 description 2
- 230000000996 additive effect Effects 0.000 description 2
- 230000004075 alteration Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 238000007667 floating Methods 0.000 description 2
- 238000011010 flushing procedure Methods 0.000 description 2
- 239000003345 natural gas Substances 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 235000019738 Limestone Nutrition 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009933 burial Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000012790 confirmation Methods 0.000 description 1
- -1 contains methane Chemical compound 0.000 description 1
- 239000010779 crude oil Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 238000001802 infusion Methods 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000006028 limestone Substances 0.000 description 1
- 238000011068 loading method Methods 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000003755 preservative agent Substances 0.000 description 1
- 230000002335 preservative effect Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000007790 scraping Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/25—Methods for stimulating production
- E21B43/26—Methods for stimulating production by forming crevices or fractures
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/01—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells specially adapted for obtaining from underwater installations
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Earth Drilling (AREA)
Abstract
The application discloses a site construction method of a fishbone well, which comprises the following steps: determining a construction point and determining the conditions of a submarine hydrate well position, a frozen soil layer and a hydrate sandstone layer; determining a downhole operation pipe column structure according to pressure change in a logging curve, and determining a fish bone spur completion range according to reservoir hole seepage characteristics and a development scheme; according to the structure of the underground operation pipe column and the well completion area, the density of the fishbone is regulated, and the drilling direction of the fishbone branch pipe, the installation positions and the number of the fishbone nipple are determined; determining pumping pressure to ensure that the position of the last fishbone nipple reaches the minimum pressure for normal operation; starting pump circulation to enable the last fishbone nipple to reach the minimum pressure for normal operation, and carrying out fishbone well reconstruction on the reservoir by all the fishbone nipples; the application uses ground pressurization to carry out branch pipe drilling operation, has less field construction procedures, short time, less large equipment use, small occupied area, low cost, large reconstruction density, controllable reconstruction depth, less working fluid consumption and small ground stress influence; the anisotropic reservoir has good yield increasing effect.
Description
Technical Field
The application relates to the technical field of well drilling and completion, in particular to a site construction method of a natural gas hydrate reservoir fishbone completion well and corresponding matched equipment thereof.
Background
The natural gas hydrate is shallow in buried depth and is usually positioned at 0-500 m on the sea floor, but the abundance is generally low, the natural gas hydrate is distributed in a large area and is locally enriched, the well pattern density is required to be increased, the recovery ratio is improved, and the development cost is high. In the offshore drilling process, due to factors such as complex stratum, hydrate occurrence state and the like, the problem that a reservoir is loose and easy to cause well wall collapse, drill sticking and the like is solved. The deck area of the offshore drilling platform is limited, equipment used for measures such as hydraulic fracturing, well completion, yield increase and the like are limited, and the measures have a plurality of construction links and long operation time.
The existing fishbone drilling system can be lowered into the well only after being connected. 3-4 small-diameter drill pipes are arranged in each section of fishbone tail pipe, and the front end of each small-diameter drill pipe is connected with a jet drill bit. When the drill pipe is lowered to a preset position, the pump is started to boost pressure, the steering guide rail of the small-diameter drill pipe obliquely extends under the action of the propelling force, and hydraulic jetting operation is started to form a pore canal. However, the prior art has the following problems: (1) The fracturing construction operation needs a plurality of large-scale fracturing pump sets, sand mixing skids, a large amount of fracturing fluid and the like, but the offshore drilling platform has limited area, and the placing requirement of the equipment is difficult to meet; (2) The hydrate reservoir has wide distribution and low abundance, so that the effective swept area of a single well is small, and the development cost is high; (3) The hydrate reservoir is complex, underground operation accidents easily occur in the well drilling and completion process, the risk is high, and the operation cost is increased; (4) The hydraulic fracturing construction uses a large amount of water, propping agent and chemical additive, which is easy to cause environmental pollution; (5) Well cementation, perforation, well flushing and other operations are needed before hydraulic fracturing construction, so that the construction period is long.
Disclosure of Invention
In order to solve the problems, the application provides a site construction method of a natural gas hydrate fishbone well and corresponding matched equipment.
The field construction of the natural gas hydrate fishbone well comprises the following steps: determining a construction point and determining the conditions of a submarine hydrate well position, a frozen soil layer and a hydrate sandstone layer; determining a downhole operation tubular column structure according to pressure change in a logging curve, and determining a fish bone spur completion range and working fluid performance according to reservoir hole seepage characteristics and development schemes; according to the structure of the underground operation pipe column and the well completion area, the density of the fishbone is regulated, and the drilling direction of the fishbone branch pipe, the installation positions and the number of the fishbone nipple are determined; determining pumping pressure to ensure that the position of the last fishbone nipple reaches the minimum pressure for normal operation; and (3) starting a pump for circulation to enable the last fishbone nipple to reach the minimum pressure for normal operation, and carrying out fishbone well reconstruction on the reservoir by all the fishbone nipples.
Further, the minimum pressure of the normal operation reached at the position of the last fishbone nipple is 21MPa, namely the minimum starting pressure, and the nozzle consumes 2MPa.
Further, the way of adjusting the density of fish bone spurs is as follows: the single or short length is used as a unit to shorten or enlarge the space.
Further, each short section has 3-4 side branches to cover a stratum section length of 12 meters, and 25 fishbone joints can cover a stratum section of 300 meters, and total 100 side branches are accumulated to enter the stratum for more than 1200 meters.
Further, the minimum pressure of each fishbone nipple in the fishbone tool string is 21MPa when the fishbone nipple works normally.
Further, according to reservoir pore permeability characteristics and development schemes, determining that the range of the fish bone spur completion is 300-500 m section stratum.
The field construction matching device of the application comprises: slurry pump, pulping pool, jet fluid, fish bone branch pipe, main pipe, hanger, tail pipe string, feeding pipe column and casing.
Further, the fishbone completion pipe string comprises a plurality of fishbone branch pups, each fishbone branch pup comprises a sand blocking medium, an outer protection cover, a uniflow valve and a fishbone branch pipe, wherein the sand blocking medium is arranged on the outer wall of the fishbone branch pups, the outer protection cover is arranged on the outer wall of the sand blocking medium, and the fishbone branch pups, the sand blocking medium, the outer protection cover and the fishbone branch pipe are all tubular.
Further, the main pipe is matched with the well hole in size and comprises a centralizer, and holes are formed in the designated positions of the outer walls of the branch pipes for drilling of the branch pipes.
Further, according to the corresponding size and number of the stratum, the fishbone branch pipes are lowered into the stratum along with the main pipe and hung in the upper-layer casing pipe.
The on-site construction method of the fishbone well and the corresponding matched equipment provided by the application have the following beneficial effects: the on-site construction method of the fishbone well utilizes ground pressurization to carry out drilling operation, and the on-site construction time is less than 0.5 day; the procedures are reduced, the operation cost can be greatly reduced, and the economic index is improved. Compared with the conventional operation link assemblies such as horizontal well casing, well cementation, drilling plug, perforation, pipe scraping, well completion and yield increase, the application can moderately relax the harsh conditions with high requirements on the well cementation quality of the horizontal well, has a plurality of advantages compared with the conventional hydraulic fracturing and yield increase mode, does not need a fracturing pump set, has small occupied area and needs less liquid amount compared with the yield increase operation under the same condition; the number of pumps and the number of the pumps for fracturing and acid fracturing are less than that of the pumps and the number of the pumps for filling; adjustable and controllable stratum penetration depth within the range of less than 12m of stratum penetration depth; the lower packer is selected according to stratum layering requirements, and the requirements of the required layering sections can be met.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments described in the present application, and other drawings may be obtained according to these drawings for a person having ordinary skill in the art.
FIG. 1 is a flow chart of a method of in situ construction of a fishbone wellbore in accordance with an embodiment of the application;
FIG. 2 is a block diagram of a fish bone completion string according to an embodiment of the present application.
Detailed Description
The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
Furthermore, the following description of the embodiments refers to the accompanying drawings, which illustrate specific embodiments in which the application may be practiced. Directional terms, such as "upper", "lower", "front", "rear", "left", "right", "inner", "outer", "side", etc., referred to in the present application are merely directions referring to the attached drawings, and thus, directional terms are used for better, more clear explanation and understanding of the present application, rather than indicating or implying that the apparatus or element being referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present application.
In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted", "connected" and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected or integrally connected; may be a mechanical connection; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present application will be understood in specific cases by those of ordinary skill in the art.
The application aims to provide a site construction method of a fishbone well, which solves the problems of the prior art and has the characteristics of good yield increasing effect, simple construction, short construction period, low cost and the like.
In order to make the above objects, features and advantages of the present application more comprehensible, the method for in-situ construction of a fish bone well according to the present application will be described in further detail with reference to fig. 1.
The on-site construction method of the fishbone well comprises the following steps:
s101: determining a construction site, a submarine hydrate well position, a frozen soil layer and a hydrate sandstone layer;
firstly, determining a construction sea area, primarily knowing data such as water depth, hydrate reservoir type, burial depth and the like, and determining a submarine hydrate well position, a frozen soil layer and a hydrate sandstone layer.
S102: determining the underground structure of a working string according to a pressure change curve in a logging curve, and determining the completion range of the fish bone spur and the performance of working fluid according to the seepage characteristics of a reservoir hole and a development scheme;
and secondly, determining the structure of the underground operation tubular column according to the formation pressure change in the logging curve, and further performing 300-500 m section formation coverage according to the reservoir hole seepage characteristics and the development scheme, wherein the well completion region is optimized.
The 4 side branches of each joint provided by the application cover a stratum segment length of 12 meters, and 25 fishbone joints can cover a stratum segment of 300 meters, and the total number of 100 side branches is more than 1200 m.
S103: the density of the fishbone is regulated, the length of the pup joint is taken as a unit, and the drilling direction, the mounting position and the number of the fishbone branch pipes are determined;
according to the underground operation pipe column structure and the well completion area, the density of the fishbone is adjusted, the distance is shortened or enlarged by taking the length of a single pipe or a short pipe as a unit, and the drilling direction of the fishbone branch pipe, the installation positions and the number of the fishbone short pipe are determined.
S104: determining pumping pressure to make the position of the last fish bone spur branch pipe joint reach the minimum pressure of 21MPa for normal operation;
according to the drilling direction of the fishbone branch pipe, the installation positions and the number of the fishbone pup joints, determining the pumping pressure required to be pumped, so as to ensure that the position of the last fishbone branch pipe joint reaches the normal working minimum pressure, wherein the normal working minimum pressure is 21MPa; the nozzle consumes 2MPa.
S105: starting pump circulation to enable the last fishbone nipple to reach the minimum pressure of 21MPa for normal operation, and carrying out fishbone well reconstruction on the reservoir by all the fishbone nipples;
after the fishbone completion string is put in, the pump is started for circulation, and after the last fishbone nipple reaches the minimum pressure of 21MPa for normal operation, all the fishbone nipples reform the fishbone wells on the reservoir.
In the present application, the field construction kit to be provided includes: slurry pump, pulping pool, jet fluid, fish bone well completion pipe string, main pipe, hanger, tail pipe string, feeding pipe string and casing.
Referring to fig. 2, a fish bone completion string used in the field construction kit according to the present application will be described in detail.
As shown in fig. 2, the fishbone completion pipe string is composed of a plurality of fishbone branch pup joints (1), the fishbone branch pup joints (1) comprise sand blocking media (2), outer protection covers (3), check valves (4) and fishbone branch pipe (5), the sand blocking media (2) are installed on the outer wall of the fishbone branch pup joint (1), the outer protection covers (3) are installed on the outer wall of the sand blocking media (2), and the fishbone branch pup joint (1), the sand blocking media (2), the outer protection covers (3) and the fishbone branch pipe (5) are all tubular.
The main pipe used by the field construction matching equipment is matched with a well hole, and comprises tools such as a centralizer, a floating hoop, a floating shoe and the like, and holes are formed in designated positions for drilling of branch pipes.
In order to match the fish bone well completion pipe string, the application also needs to use a running tool, a connecting buckle type confirmation, a buckle changing processing and a pipe column loading and unloading, prepares corresponding sizes and numbers according to the stratum, and the fish bone branch pipe is run into the stratum along with the main pipe and hung in the upper-layer sleeve.
The pulping pool used in the application is to add corresponding abrasive or acid liquor according to stratum property to prepare lateral drilling fluid so as to be used for fish bone completion pressurized drilling. Meanwhile, in order to meet the requirements of site construction, labor protection supplies for construction are also required to be provided; and meanwhile, a field service engineer exists at a construction site.
The present application will be described in further detail with reference to specific examples.
Example 1:
1) North American XX oil field #2 well, the producing layer is Texas chalk limestone with highest stratum hardness in the world, belongs to a low-pressure crude oil production well, 15 fishbone joints are put into operation, the construction displacement is 8.1 barrels per minute, the acid liquor is squeezed into the stratum for about 2000 barrels, the highest construction pump pressure is defined as 3250Psi after 4 hours of squeezing.
2) Fish bone spur application conditions;
an open hole wellbore; wellbore size: 8-1/2 ' or 6 ' -6-1/2 '; the normal operation pressure of the tool is 21MPa, and the withstand voltage is 35MPa; conventional tool formation downhole temperatures do not exceed 175 ℃; the method is suitable for vertical wells, inclined wells, directional wells or horizontal wells; setting the same size sleeve in the well bore dog leg degree requirement; the horizontal well can realize multi-layer comprehensive exploitation of the upper layer and the lower layer; the depth of the fishbone needle tube entering the ground is 12 meters; pore-forming density of not more than 4 (or 3)/12 m; all fishbone lance tubes need to be simultaneously introduced into the formation.
3) Giving a construction design scheme by engineers;
4) According to the design scheme, workers perform construction site operation;
assembling on-site operation tools, descending the fishbone tool into the well, and pumping acid for operation.
5) On-site construction working parameters:
last fishbone pressure: 21MPa (MPa)
Nozzle consumption pressure: 2MPa of
Coverage area: 300-500 m
Well fluid leak rate: 6 barrels/min
Liquid level depth before operation: 5200-5400ft (grouting starting from 5000 ft)
The acid liquor injection mode is as follows: extrusion method (below formation fracture pressure)
Acid liquor name: 15% HCL+preservative+additive
Acid squeezing operation time: 5:38 to 8:38, liquid: 8:38- -8:58, together 3:20
Acid extrusion displacement: 8.1 barrels per minute, maximum job displacement: 10 barrels/min (liquid)
Amount of acid liquid to be squeezed: 1915 barrel, total infusion: 2058 barrel
Highest surface pump pressure: 3250psi, lowest surface pump pressure: 100psi
Intermediate pressing time: 6:52 (the corresponding needle tube forward operation time took 74 minutes)
All needle tubes enter stratum to consume acid liquor: 599.4 bucket (95.3 square)
Excess acid liquid amount coefficient: 3.2
6) Notice matters
Construction notes: the hanger is matched with the top packer setting and the fishbone tool;
tool notes: when the pipe column is blocked, the pump is not started to circulate mud as much as possible, and the pipe column is lifted up and lowered down or rotated to drill down preferentially.
7) Results
The fish bone spur can be proved to be safely implemented underground, and the operation risk is within an acceptable range; the tail pipe can be rotated to safely run to the bottom of the well in the process of running the pipe column; reading the pressure map that the 12 meter needle tube completely enters the stratum and confirming that the forward pulser works normally; confirming successful fixation of the back bone anchor; the acid liquor circulation valve is closed according to a preset scheme; the penetration rate and the construction pumping liquid amount required by field operation are successfully predicted through an indoor test; 30 sets of forward pulse valves were used.
The site construction equipment of the fishbone pipe well can simply, accurately and efficiently communicate with an oil reservoir; the operation uses a 4.5 inch tubular column to connect 15 fishbone tailpipes and installs 3 open hole reverse thrust anchors; so that the pump-on operation can be smoothly carried out according to the plan. The circulation valve is closed after acid is met, injection operation is started, and 60 branches are successfully opened; the whole operation is smoothly completed according to the original plan; when the fish bone spur needle tube is completely released, the pressure gauge displays back pressure; the entire pump-on operation lasted for about 5 hours, including the injection operation and the liquid flowback.
The application solves the problems in the prior art, and has the following difficulties and meanings: (1) The natural gas hydrate mainly contains methane, is a green energy source, has been listed as 173 th mineral seeds in China, can generate 164 unit volumes of natural gas under standard conditions at most when decomposing in unit volumes, and has great significance in relieving the total energy demand of China because a large amount of natural gas hydrate exists in the deep sea of the south China sea. And (2) the reconstruction effectiveness of the fishbone completion reservoir is high. The main well hole can effectively increase the exposed area of the hydrate reservoir through the plurality of branch pipes, so that the natural gas yield is improved, and the trend and the length of the branch pipes can be adjusted according to the characteristics and the needs of the reservoir. And (3) the fishbone completion construction flow is simple. The liner string is as usual and is provided with liner hanger slips. The production increasing operation is completed while well completion, and well cementation, perforation, well flushing, fracturing and other operations are not needed. And (4) the fishbone completion can reduce the operation cost. The conventional reservoir reconstruction operation flow is multiple, the operation time is long, large-scale ground equipment is multiple, the working procedures are complex, in contrast, the fishbone well completion utilizes ground pressurization to carry out drilling operation, the site construction time is less than 0.5 day, a plurality of fracturing pump sets are not needed, the occupied area is small, the operation flow is simple, and the operation cost can be greatly reduced. And (5) the fishbone completion effectively protects the reservoir. In the process of increasing production by hydraulic fracturing, the reservoir is easy to be damaged, and the fishbone completion technology can effectively protect the reservoir. And (6) the fishbone completion has little influence on the environment. By reducing the operation flow and the construction time, the water consumption for operation is small, the influence on the environment is reduced, and meanwhile, the flowback and the treatment of the traditional hydraulic fracturing fluid are avoided.
While preferred embodiments of the present application have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the following claims be interpreted as including the preferred embodiments and all such alterations and modifications as fall within the scope of the application. It will be apparent to those skilled in the art that various modifications and variations can be made to the present application without departing from the spirit or scope of the application. Thus, it is intended that the present application also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.
Claims (8)
1. A method of in situ construction of a fish bone well, the method comprising:
determining a construction point and determining the conditions of a submarine hydrate well position, a frozen soil layer and a hydrate sandstone layer;
determining a downhole operation tubular column structure according to pressure change in a logging curve, and determining a fish bone spur completion range and working fluid performance according to reservoir hole seepage characteristics and development schemes;
according to the structure of the underground operation pipe column and the well completion area, the density of the fishbone is regulated, and the drilling direction of the fishbone branch pipe, the installation positions and the number of the fishbone nipple are determined;
determining pumping pressure to ensure that the position of the last fishbone nipple reaches the minimum pressure for normal operation;
starting pump circulation to enable the last fishbone nipple to reach the minimum pressure for normal operation, and carrying out fishbone well reconstruction on the reservoir by all the fishbone nipples;
the field construction matching equipment applied to the field construction method comprises: the device comprises a slurry pump, a slurry tank, jet fluid, fish bone branch pipes, a main pipe, a hanger, tail pipe strings, a feeding pipe column and a sleeve;
the adopted fishbone completion pipe string comprises a plurality of fishbone branch pups, each fishbone branch pup comprises a sand blocking medium, an outer protection cover, a uniflow valve and a fishbone branch pipe, wherein the sand blocking medium is arranged on the outer wall of the fishbone branch pups, the outer protection cover is arranged on the outer wall of the sand blocking medium, and the fishbone branch pups, the sand blocking medium, the outer protection cover and the fishbone branch pipe are all tubular.
2. The field construction method according to claim 1, wherein the minimum pressure of normal operation reached at the last fish bone nipple is 21MPa, i.e. the minimum start-up pressure, at which the nozzle consumes 2MPa.
3. The field construction method according to claim 1, wherein the means for adjusting the density of fish bone spurs is: the single or short length is used as a unit to shorten or enlarge the space.
4. A field construction method according to claim 3, wherein each sub has 3-4 side branches covering a 12 meter formation section length, 25 fishbone joints covering a 300 meter section formation, and a total of 100 side branches accumulating into the formation for more than 1200 m.
5. A field construction method according to claim 3, wherein each fishbone sub of the fishbone tool string operates normally at a minimum pressure of 21MPa.
6. The field construction method of claim 1, wherein the range of the fish bone spur completion is 300-500 m section stratum is determined according to reservoir hole permeability characteristics and development schemes.
7. The field construction method according to claim 1, wherein the main pipe is matched with the well bore in size and comprises a centralizer, a float collar, a float shoe and a suspension tool, and holes are formed in the designated positions of the outer walls of the branch pipes for drilling the branch pipes.
8. The on-site construction method as claimed in claim 7, wherein the fishbone branch pipes are prepared in corresponding sizes and numbers according to the formation, and the branch pipes are lowered into the formation together with the main pipe and suspended in the upper casing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011300763.XA CN112282720B (en) | 2020-11-19 | 2020-11-19 | Site construction method of fishbone well and corresponding matched equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011300763.XA CN112282720B (en) | 2020-11-19 | 2020-11-19 | Site construction method of fishbone well and corresponding matched equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112282720A CN112282720A (en) | 2021-01-29 |
| CN112282720B true CN112282720B (en) | 2023-11-10 |
Family
ID=74398724
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011300763.XA Active CN112282720B (en) | 2020-11-19 | 2020-11-19 | Site construction method of fishbone well and corresponding matched equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112282720B (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104533288A (en) * | 2014-11-20 | 2015-04-22 | 西南石油大学 | Drilling and completion and production increasing method for shale gas reservoir of multilateral fishbone horizontal well |
| CN105952378A (en) * | 2016-05-12 | 2016-09-21 | 西南石油大学 | Tree-shape structure well drilling and completion and yield increasing method |
| CN108756827A (en) * | 2018-05-17 | 2018-11-06 | 中国石油天然气集团有限公司 | A kind of mining system and method for seabed combustible ice |
| CN108868613A (en) * | 2018-07-03 | 2018-11-23 | 中国石油大学(华东) | Fishbone well waterpower drill bit creeps into hydraulic parameters Multipurpose Optimal Method and device |
| CN108952580A (en) * | 2018-07-27 | 2018-12-07 | 中国石油大学(华东) | Drilling pipe recoverable abradant jet fishbone well bores completion system |
| CN110863800A (en) * | 2018-08-27 | 2020-03-06 | 中国石油化工股份有限公司 | Single-well closed development method for hot dry rock |
| CN111734359A (en) * | 2020-07-28 | 2020-10-02 | 广州海洋地质调查局 | Natural gas hydrate horizontal branch well exploitation method based on deepwater suction anchor |
| CN111827947A (en) * | 2020-08-10 | 2020-10-27 | 广州海洋地质调查局 | Open hole fishbone production increasing and screen pipe well completion integrated pipe column |
| CN111827948A (en) * | 2020-08-10 | 2020-10-27 | 广州海洋地质调查局 | Open hole fishbone production increasing and sieve tube well completion integrated tool |
| CN111827946A (en) * | 2020-08-10 | 2020-10-27 | 广州海洋地质调查局 | Barefoot fishbone yield increase and sieve tube well completion construction process |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5147945B2 (en) * | 2007-08-23 | 2013-02-20 | シュルンベルジェ ホールディングス リミテッド | Well construction using small diameter side holes |
| US9984180B2 (en) * | 2015-05-05 | 2018-05-29 | King Fahd University Of Petroleum And Minerals | Inflow performance relationship for multilateral wells |
-
2020
- 2020-11-19 CN CN202011300763.XA patent/CN112282720B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104533288A (en) * | 2014-11-20 | 2015-04-22 | 西南石油大学 | Drilling and completion and production increasing method for shale gas reservoir of multilateral fishbone horizontal well |
| CN105952378A (en) * | 2016-05-12 | 2016-09-21 | 西南石油大学 | Tree-shape structure well drilling and completion and yield increasing method |
| CN108756827A (en) * | 2018-05-17 | 2018-11-06 | 中国石油天然气集团有限公司 | A kind of mining system and method for seabed combustible ice |
| CN108868613A (en) * | 2018-07-03 | 2018-11-23 | 中国石油大学(华东) | Fishbone well waterpower drill bit creeps into hydraulic parameters Multipurpose Optimal Method and device |
| CN108952580A (en) * | 2018-07-27 | 2018-12-07 | 中国石油大学(华东) | Drilling pipe recoverable abradant jet fishbone well bores completion system |
| CN110863800A (en) * | 2018-08-27 | 2020-03-06 | 中国石油化工股份有限公司 | Single-well closed development method for hot dry rock |
| CN111734359A (en) * | 2020-07-28 | 2020-10-02 | 广州海洋地质调查局 | Natural gas hydrate horizontal branch well exploitation method based on deepwater suction anchor |
| CN111827947A (en) * | 2020-08-10 | 2020-10-27 | 广州海洋地质调查局 | Open hole fishbone production increasing and screen pipe well completion integrated pipe column |
| CN111827948A (en) * | 2020-08-10 | 2020-10-27 | 广州海洋地质调查局 | Open hole fishbone production increasing and sieve tube well completion integrated tool |
| CN111827946A (en) * | 2020-08-10 | 2020-10-27 | 广州海洋地质调查局 | Barefoot fishbone yield increase and sieve tube well completion construction process |
Non-Patent Citations (2)
| Title |
|---|
| 微井眼鱼骨增产技术;王敏生;光新军;戴文潮;曲海;;石油钻采工艺(第05期);全文 * |
| 超薄油层鱼骨井钻完井技术;邢广宇;谷玉堂;奚广春;李正华;;西部探矿工程(第07期);全文 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112282720A (en) | 2021-01-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110397428B (en) | Displacement coalbed methane yield increasing method for coalbed methane jointly mined by vertical well and U-shaped butt well | |
| US11408264B2 (en) | Volumetric fracturing method of temporarily plugging and diverting through functional slick water with oil displacement agent injected simultaneously | |
| CN106437662A (en) | Hybrid temporary plugging volume fracturing method suitable for deep shale gas horizontal well | |
| RU2526937C1 (en) | Method of low-permeable oil deposit development | |
| WO2007124378A2 (en) | Method of drilling from a shaft for underground recovery of hydrocarbons | |
| US11136865B2 (en) | Integrated construction method of fracturing and tertiary oil recovery for low-permeability reservoir | |
| CN105952378A (en) | Tree-shape structure well drilling and completion and yield increasing method | |
| CN114542164A (en) | Co-production and CO production of fluidized coal and coal bed gas in deep coal bed2Reservoir integration method | |
| RU2320849C2 (en) | Well construction and operation method | |
| CN114135265B (en) | Low-cost and high-efficiency transformation process method for low-permeability reservoir of offshore oil field | |
| CN113653531B (en) | Method for dredging low-permeability roof water | |
| US7980299B1 (en) | Horizontal well treating method | |
| CN110608027B (en) | Large-scale hydraulic fracturing permeability-increasing pre-gas-pumping treatment process for directional ultra-long drilling of roadway | |
| CN112282720B (en) | Site construction method of fishbone well and corresponding matched equipment | |
| CN107461182A (en) | Layering fracturing sand control method | |
| RU2533470C2 (en) | Procedure for recovery of tightness in flow strings | |
| CN111827946B (en) | Naked fish bone spur yield increasing and screen pipe well completion construction process | |
| CN113062718A (en) | Fracturing and recharging integrated geothermal mining and recharging system and method | |
| CN111425178A (en) | Coal mine underground branch drilling staged fracturing permeability increasing method and pressure pumping integrated device | |
| US10513917B2 (en) | Method for fracturing a formation | |
| CN111411932A (en) | Method and device for integrating segmented well completion and transformation of horizontal well | |
| CN217080422U (en) | Double-pipe water injection device of ultra-deep fracture-cavity reservoir oil well | |
| Rausch et al. | Case history of successfully water flooding a fractured sandstone | |
| CN213392062U (en) | Multi-coal-seam bushing tool | |
| CN112324415B (en) | Combined segmented reconstruction method for selective repeated reconstruction of old well |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |