Development method of heavy oil or bitumen mine field with control of well product extraction

FIELD: oil and gas industry.

SUBSTANCE: development method of heavy oil or bitumen deposit with control of well product extraction involves construction of upper injection and lower production wells with horizontal sections located one above another. At construction of wells their horizontal sections are equipped with filters installed opposite productive formation zones. Inside filter with non-perforated interval in production well there arranged is a shank provided with inlet holes dividing the filter into extraction zones. Besides, shank is equipped on the inner side with a stock with side channels. Inner space of stock is interconnected with inlet of pump lowered to production well on the tubing string with possibility of longitudinal movement of the tubing string together with pump and stock in the shank. Heat carrier is pumped through horizontal injection well with warming-up of the formation by creating the steam chamber, and product is extracted through horizontal production well. Thermograms of steam chamber are taken, the chamber's warm-up state is analysed for uniform heating and available temperature peaks, and considering the obtained thermograms, uniform heating of steam chamber is performed. Before the tubing is lowered to production well, first, stock is lowered with a shank concentrically arranged on it and fixed in transport position with a shear screw. Besides, on the outer side of the shank lower end there installed is heat-resistant packer; after the stock is lowered to production well, lower end of tubing is put on its upper end. Tubing is equipped with a pump. Tubing is lowered to production well till the packer is arranged at non-perforated interval of production well filter; after that, packer is installed by dividing the filter of production well into two extraction zones - initial and final. Uniform heating of steam chamber is performed by supplying the heat carrier through injection well. Penetration of heat carrier and/or formation water to the pump inlet is avoided by controlling the product extraction to the pump inlet from the initial extraction zone. Besides, product extraction volume is reduced in the initial extraction zone where temperature peaks occur. For that purpose, inlet shank holes corresponding to the initial extraction zone are made with reduction of carrying capacity from face to head, and side channels of stock are provided with possibility of alternating interaction with one of inlet shank hole in the initial extraction zone. This is performed by restricted longitudinal movement of pipe string together with pump and stock relative to shank by increasing or reducing the number of connection pipes on upper end of pipe string depending on the distance between inlet holes of the shank. Pipe string is fixed on the head of production well in the required position by means of a face plate on a supporting flange, and shank hole corresponding to the final extraction zone is made in the form of an open stock end.

EFFECT: improving the control of product extraction volume from extraction zones; simpler erection and lower metal consumption on the design.

3 dwg

 

The invention relates to the oil industry and can find application in the development of the field of high-viscosity and bitumen oil.

There is a method of development of heavy oil or bitumen with the regulation of the selection of production wells (patent RU №2413363, IPC 8 EV 43/24, publ. in bull. No. 5 from 20.02.2011), including the construction of the upper pressure and a lower mining wells with horizontal sections located one above the other, the injection of fluid through a horizontal injection well with a warm-up layer, creating a steam chamber and selection of products through horizontal production well, in which shoot infrared images of the steam chamber, examine the state of her warm-up on the uniformity of heating and the presence of temperature peaks, and taking into account the obtained thermograms provide uniform heating of the steam chamber, changing the areas of product selection, and in the construction of wells, their horizontal sections equip installed opposite zones of the productive layer with filters inside the filter at the production wells are placed the shank of the pump, which is loose on the string of pipe and equip side channels of the safety valves, and the shank, provided with inlet holes, breaking the filter zone selection, at a distance, excluding breakthrough tepano is Italia when changing zone selection equip the outside below the upper hole packer set above the filter and inside the piston rod, the inner space through the check valve communicated with the pump inlet, and the space between the stem and shank, between the input hole of the shank tightly divide before descending annular inserts, breaking the shank section selection, which reported side channels through one with the inner space of the rod to change the zones for selection occurs when the temperature peaks, the selection of products pump stop in a string of pipe, create excessive pressure which, having passed through the bypass channels through the closed non-return valve on the piston, shifting his together with the rod so that its side channels, passing through the annular insert, according to the internal space of the piston rod adjacent unused to this section of the selection, then the selection of products resume prior to the occurrence of temperature peaks opposite sections of selection in their respective areas of selection, to prevent breakthrough of the coolant selection of products pump stop, in the annular space of the pipe string, create excessive pressure which, having passed through the upper hole of the shank through the packer into the shank from the back side of the piston, moving the piston with HVO what davicom in original condition, then the selection of products resume from the original sections and areas of selection, during the operation cycles if necessary, change sections and zones selection is repeated.

The disadvantages of this method are:

- first, high metal structure and, as a result, large financial costs for implementation of the method, which is associated with the descent into the production well of the shank and stem-type "pipe" the entire length of the filter of the horizontal section of the production well;

- secondly, the complex process of implementing the method so as to change the areas of selection, you need to create hydraulic pressure in the string of pipe, through which the bypass channel by the closed check valve acts on the piston and moves the piston rod relative to the shank and change of zone selection in the producer;

- third, not adjustable bandwidth product input to the pump intake zone selection, and change only the zone selection (or selection of a particular zone or no selection).

The closest in technical essence is a way of developing the heavy oil or bitumen with the regulation of the selection of production wells (patent RU №2413068, IPC 8 EV 43/24, publ. in bull. No. 6, from 27.02.2011), including the construction of the upper discharge is lower mining wells with horizontal sections, located one above another, the injection of fluid through a horizontal injection well with a warm-up layer by creating a steam chamber and selection of products through horizontal production well, in which shoot infrared images of the steam chamber, examine the state of her warm-up on the uniformity of heating and the presence of temperature peaks, and taking into account the obtained thermograms provide uniform heating of the steam chamber, changing the areas of product selection, and in the construction of wells, their horizontal sections equip installed opposite zones of the productive layer with filters inside the filter at the production wells place the shank, provided with inlet holes, breaking the filter zone selection, at a distance, eliminating the breakthrough of the fluid in the change of zone selection, while the shank equip inside the stem, the inner space communicated with the pump inlet, the descent into the production well on the string of pipe, on which the mouth is equipped with a double-acting hydraulic cylinder, and the space between the stem and shank between the input hole of the shank tightly divide before descending annular inserts, breaking the shank section selection, which reported side channels through one with the inner space of the rod, for zones for which tbore occurs when the temperature peaks, selection of products the pump stops, the hydraulic cylinder creates excessive pressure, resulting in longitudinal movement along the pipe string with the pump and the rod shank so that its side channels, passing through the annular insert, according to the internal space of the piston rod adjacent unused to this section of the selection, then the selection of products resume prior to the occurrence of temperature peaks opposite sections of selection in their respective areas of selection, to prevent breakthrough of the coolant selection of products pump stops, the hydraulic cylinder will create excessive back pressure, resulting in longitudinal movement of the shank and return to its original state along the tubing from the pump and the rod after which the selection of products resume from the original sections and areas of selection, during the operation cycles when changing zones selection of shank repeat.

The disadvantages of this method are:

- first, high metal structure and, as a result, large financial costs for implementation of the method that is associated with the presence of hydraulic jacks mounted on the mouth of the production well, and the descent into the production well of the shank and stem-type "pipe" the entire length of the filter of the horizontal section of the production well;

- secondly, DL is the displacement of the rod relative to the shank when changing zones selection of products you need at the wellhead to install gidrotartrat, the production of which requires additional financial costs and the movement of the piston of the hydraulic cylinder is carried out by means of a pump unit is placed at the wellhead, in addition, the movement of the rod relative to the shank is limited by the stroke length of the piston cylinder and is not able to precisely lock the rod relative to the shank in a predetermined upper position without backwater pumping unit;

- third, not adjustable bandwidth product input to the pump intake zone selection, and change only the zone selection (or selection of a particular zone or no selection). For example, it is impossible to reduce the volume of products selection of the zone, which broke the coolant and/or produced water, but you can only disable this area;

- fourthly, the results of experimental field work revealed that a breakthrough of the coolant in the horizontal section of the production well occurs at the initial zone (from the wellhead). This is due to the fact that the main volume of fluid pumped into the formation at the starting area of the horizontal section of the production well.

Objectives of the invention are to regulate the volume selection of products from areas of product selection of the production well in the process of developing the heavy oil or bitumen depending on cash is being temperature peaks in thermograms, shoot at the production wells due to bandwidth throttling openings in the initial area of product selection and elimination (reduction) of the ingress of fluid and/or formation waters from the initial zone selection on the pump intake with rigid fixation of the tubing at the wellhead, as well as simplifying installation, reducing the metal structure and, as a consequence, the reduction of financial costs for implementation of the method.

The problem is solved by the method of development of heavy oil or bitumen with the regulation of the selection of production wells, including the construction of the upper pressure and a lower mining wells with horizontal sections located one above the other, in the construction of wells, their horizontal sections equip installed in front of the productive zones of the reservoir filters within a filter with non-perforated interval in the producer place the shank, provided with inlet holes, breaking the filter zone selection, while the shank equip the inside of the stem with side channels, the inner space of the rod communicated with the pump inlet, the descent into the production well on the string of pipe with the possibility of longitudinal movement along the pipe string with the pump and the rod shank, the injection of fluid through the horizontal is th injection well with a warm-up layer by creating a steam chamber and selection of products through horizontal production well, when shooting infrared images of the steam chamber, examine the state of her warm-up on the uniformity of heating and the presence of temperature peaks, and taking into account the obtained thermograms provide uniform heating of the steam chamber.

What's new is that before lowering the pipe string into the production well, first down the shaft with concentric posted shank fixed in the transport position, the shear screw the outside at the lower end of the shank install heat-resistant packer, after the descent of the rod into the production well on its upper end wrapped around the lower end of the pipe string, the string of pipe equipped with a pump, the lower column tubes in production well before placing the packer in non-perforated interval of the filter of the production well, and then produce planting packer, hermetically separating filter production well into two zones selection, initial and final, provide uniform heating steam camera feed fluid through the injection well, with the exception of break fluid and/or formation water at the pump inlet is carried out by adjusting the selection of the products to the pump inlet from the initial zone selection, and in the initial area selection, experiencing temperature peaks, the amount of product selection cut, for this input hole of the shank, correspond to their initial area selection perform with decreasing bandwidth from the bottom to the mouth, and the side channels of the rod comply with the alternate message with one of the inlet holes of the shank in the initial area selection, which produce a limited longitudinal movement together of the column of tubes with a pump and piston rod relative to the shaft by increasing or reducing nozzles at the upper end of the tubing in relation to the distance between the input hole of the shank, and fixing the tubing at the wellhead of a production well in position and carry out the faceplate on the abutment flange and the bore of the shank corresponding to the destination zone selection is made in the form of an open end of the rod.

1 schematically presents the proposed method for the development of heavy oil or bitumen with the regulation of the selection of the production wells.

Figure 2 shows a magnified view And part horizontal section of the production well, is depicted in figure 1.

Figure 3 schematically shows the mouth of the production well.

First, make the construction of the upper injection 1 (see figure 1) and lower mining of 2 wells with horizontal sections 3 and 4, respectively, located one above another and exposing the reservoir 5 with heavy oil or bitumen, and in the process of building magnet is positive 1 and refinery 2 wells their horizontal sections 3 and 4 respectively equipped with filters 6 and 7.

Injection well 1 is used for injection of fluid into the reservoir 5, and the production well 2 is used for heavy oil or bitumen (products) from the reservoir 5. Next injection well 1 supply column tubing (tubing) 8 with horizontal perforated section 9.

Before lowering the pipe string 10 (see figure 1) in the production well 2 by measuring the length of the lower rod 11 (see figure 2) with concentric posted on the shank 12, as recorded in the transport position, the shear screw 13 (see figure 2).

Outside on the lower end of the shank 12 (see figure 1) establish a heat-resistant packer 14. After the descent of the rod 11 in the production well 2 at its upper end wrapped around the lower end of the tubing 10 and equip the string of pipe 10 by the pump 15. Go down the string of pipe 10 by measuring its length in a production well 2 before placing the packer 14 (see figure 2) in non-perforated interval 16 (length b) filter 7 production well 2 (see figure 1), then produce planting packer 14 (see figure 2), hermetically separating filter 7 production wells into two zones selection: start and end, respectively, Q1and Q2, each of which divides the filter on two plots of length L1and L2respectively. For example, if the length of the filter 7 L=205 m, length L1=100 m, b=5 m (unperforated part is OK filter 7 for planting packer 14), length L2=100 m Column pipe 10 (see figure 1) is provided with a pump 15 (for example, downhole sucker rod pump differential type NN-SP for the production of viscous oil supplied OOO TD "Elkam-Neftemash" Russia, Perm).

Packer 14 (see figure 2) made of heat-resistant, allowing you to work at high temperature, for example manufactured by the scientific-production firm "Packer" (gontarski, Republic of Bashkortostan) packer mechanical double-acting axial installation of the brand PRO-AG-O-M-122 TONS, designed for a maximum temperature of 150°C.

The shank 12 is the inlet in the form of rows of openings 171, 172...17ncorresponding to the initial area selection Q1(before heat-resistant packer 11 from the mouth of the production well 2) with decreasing bandwidth from the bottom to the mouth, and the side channels 18 of the rod 11 is performed with the alternate message with one of the openings 171, 172...17nthe shank 12 in the initial area selection Q1and the hole 19, the corresponding end-zone selection Q2made in the form of an open end of the rod 11.

The number of entrance holes 171, ... the 17nshank 12, the respective initial area selection Q1and geometric dimensions (diameter) of the holes 19 of the open end of the rod 11, with the end of the relevant zone selection Q 2(packer 11 from the bottom of the production well 2 depend on the diameter of the rod 11 and shank 12, and volume of selected products through each of the zones selection of the production well 2 and is determined empirically.

The performance of the pump 15 (see Fig 1) is calculated based on the maximum capacity of the largest inlet of the 174(see figure 2)corresponding to the initial area selection Q1and the hole 19, the corresponding end-zone selection Q2.

The total amount of selected products through the filter 7 (see figure 1) production well 2 of both zones selection is:

where Q1- volume of products taken from the initial zone selection, m3/day;

Q2- volume of products taken from the end zone selection, m3/day;

Q is total output, taken from the initial and final areas of selection, m3/day.

For example: Q1=10 m3/day, Q2=10 m3/day.

Then substituting in the formula (1), we obtain: Q=10 m3/day+10 m3/d=20 m3/day.

In the initial area selection of products Q1input the holes drilled in the shank 12 (see figures 1 and 2), presented for example in the form of four openings 171, ...the 174(see figure 2)arranged in rows along the perimeter of the shank 12 with the corresponding regulation is receiving (decrease) bandwidth products, coming from the initial zone selection Q1input 20 (see figure 1) pump 15 through changes in the areas of cross sections: S1=l/4Q1; S2=1/2Q1; S3=3/4Q1; S4=Q1; (see Fig.2), where S1; S2; S3; S4square cross-sections, respectively, of the input hole 171, ...the 174placed opposite the first zone selection Q1.

The inlet 171shank 12 corresponds to the minimum bandwidth and the inlet 174shank 12 corresponds to the maximum capacity of the first zone selection Q1.

The bandwidth of the side channels 18 (see figure 2) rod 11 above the bandwidth most of the input hole 171, ...the 174located in rows along the perimeter of the shank 12. For example, the cross-sectional area (Sb) side channels 18 of the rod 11 corresponds to a bandwidth of 30 m3/day, which exceeds the volume of the selected products from the zone of Q1=10 m3/day.

The shank 12 to equip the inside of the rod 11, is rigidly connected to the input 20 (see figure 1) of the pump 15. The inner space of the rod 11 (see figure 2) hydraulically communicated with the inlet 20 (see figure 1) of the pump 15.

Bandwidth throttling openings in the selection of products in the process of operation of dobyvayushchiy 2 from the initial zone Q 1selection of products produce longitudinal movement together of the column pipe 10 (see Fig 1) with a pump 15 and the shaft 11 relative to the shank 12 by increasing or reducing the number of nozzles 211; 212; 213(see figure 3) on the upper end of the tubing 10.

The length of the nozzles 211; 212; 213equal to the distance 11, 12, 13between the inlet openings 171, ...the 174(see figure 2), for example, 1 meter, and the fixation of the pipe string 10 (see figure 3) with pipe 211; 212; 213at its upper end at the mouth of the production well 2 (see figure 1) carry out the faceplate 22 (see figure 3) on the support flange 23.

In the transport position, as shown in figure 2, the selection of products by pump 15 (see figure 1) through the column pipe 10 from the production well 2 takes place simultaneously from both zones selection Q1and Q2in the ratio 50% 50%, respectively, with the selection of products from the zone selection Q1carry out the greatest inlet 174(see figure 2)and the selection of products from the zone selection Q2carry out through the opening 19 of the shaft 11.

Begin pumping fluid from the steam generator (not shown) in the reservoir 5 (see figure 1) on the tubing string 8 through its horizontal perforated portion 9 and the filter 6 horizontal 3 phase injection with the vazhiny 1. Depending on the permeability of the productive layer 5 select the discharge pressure and depending on the effective saturated thickness of the productive layer 5 determine the amount of injected steam with the heat of the productive layer 5 with the creation of the steam chamber.

Heated in a steam chamber of a heavy oil or bitumen from the reservoir 5 first enters the filter 7, is divided into initial and final zone selection Q1and Q2horizontal section 4 of the production well 2, and then from the initial zone selection Q1filter 7 (see figure 2) through the inlet 174shank 12 and the side channels 18 of the rod 11 in the inner space of the rod 11, while in the inner space of the rod 11 products supplied and through the opening 19 corresponding to the destination zone selection Q2. Thus, the products of the inner space of the rod 11 is fed to the inlet 20 of the pump 15 (see figure 1), which is the string of pipe 10 pumps (selects) the heated heavy oil or bitumen on the surface.

In the selection process the heated heavy oil or bitumen is a breakthrough coolant (steam) from the steam chamber into the filter 7 of the production well 2 and/or formation water in the initial area selection Q1length L1(see figure 2), as evidenced by the presence of the temperature peak is in the infrared which are based on the results of these temperature sensors (figures 1, 2, 3 not shown)installed in horizontal sections 3 and 4 (see figure 1), respectively injection 1 and the extractive 2 wells.

A breakthrough in the area of selection Q1length L1due to the fact that the main volume of fluid injected into the injection well 1, enters the reservoir from the zone 24 (see figure 1) horizontal section 3 and extending along the layer, leading to a breakthrough in the initial zone (see figure 2) selection of Q1length L1horizontal section 4 (see figure 1) production well 2.

To prevent breakthrough of the heat carrier (at break temperature peaks pointing upwards) and/or formation water breakthrough (breakthrough temperature peaks pointing down) in the filter 7 (see figure 2) in the zone of selection Q1length L1and also to ensure an even distribution of the steam chamber and reduce the water content in crude production volume selection of products from this zone selection reduce. For example, reduce the volume selection of products from the primary zone selection Q1twice, i.e. at 50% of the value of Q1for this purpose it is necessary to opposite side channels 18 of the rod 11 is the inlet 17 of the shank 12 having the cross-sectional area S2=1/2Q1thanks a selection of products from the primary zone selection Q1will be reduced to 5 m 3/day (10 m3/day./2=5 m3/day).

To do this, turn off the pump 15 (see figure 1)disassemble the faceplate 22 (see figure 3) with a support flange 23. At the mouth of the production well 2 (see figure 1) is produced by the tension of the tubing 10 up (see figure 1, 3), for example, by using a lift for underground repair of wells with a force of 10 kN, with shear screw 13 (see figure 2) is destroyed. Next pull back the string of pipe 10 (see figure 3) with pump 15 (see Fig 1) and the rod 11 (see figure 1) by the length l1=1 meter, while the inlet of the 172shank 12 is placed in front of the side channels 18 of the rod 11. Next, remove (Unscrew) the pipe 212(see figure 3) and fix the string of pipe 10 through pipe 212and the gear 22 on the supporting flange 23, initiate pump 15 (see figure 1). Resume selection of products from the primary zone selection Q1and destination zone selection Q2while the selection of products from the primary zone selection Q2reduced two times, i.e. up to 5 m3/day.

Subsequent removal of thermograms no temperature peaks in thermograms indicates the exclusion or reduction of break fluid and/or formation water in the zone of selection Q1length L1and uniform distribution of the steam chamber in the reservoir 5 (see figure 1).

In the future, bandwidth throttling when selecting p is oductio from the initial zone selection Q 1the production well 2 in the process of developing the heavy oil or bitumen to produce longitudinal movement from the bottom to the mouth or Vice versa along the tubing 10 with the pump 15 and the shaft 11 relative to the shank 12 by increasing (by inversion) or reduction (lapel) nozzles 211; 212; 213(see figure 3) on the upper end of the tubing 10 with subsequent fixation of the pipe string 10 at the mouth of the production well 2 (see figure 1) in position faceplate 22 (see figure 3) on the support flange 23.

The proposed method allows you to adjust the volume selection of products from the areas of selection, thereby achieving uniform heating of the steam chamber in the reservoir and eliminate (reduce consumption) the ingress of fluid and/or formation waters from the initial zone selection on the pump inlet with rigid fixation of the tubing at the wellhead, the descent into the production well of the shank, having a length of 6-8 m, together with the rod simplifies installation, reduces the metal structure and, as a consequence, reduced the financial costs of implementing method.

The way to develop the heavy oil or bitumen with the regulation of the selection of production wells, including the construction of the upper pressure and a lower mining wells with horizontal sections located one above the other, in which the construction of wells, their horizontal sections equip installed in front of the productive zones of the reservoir filters, the inside of the filter with perforated interval in the producer place the shank, provided with inlet holes, breaking the filter zone selection, while the shank equip the inside of the stem with side channels, the inner space of the rod communicated with the pump inlet, the descent into the production well on the string of pipe with the possibility of longitudinal movement along the pipe string with the pump and the rod shank, the injection of fluid through a horizontal injection well with a warm-up layer by creating a steam chamber and selection of products through horizontal production well, in which shoot infrared images of the steam chamber, examine the state of her warm-up on the uniformity of heating and the presence of temperature peaks, and taking into account the obtained thermograms provide uniform heating of the steam chamber, characterized in that before lowering the pipe string into the production well, first down the shaft with concentric posted shank fixed in the transport position, the shear screw the outside at the lower end of the shank install heat-resistant packer, after the descent of the rod into the production well on its upper end wrapped around the lower end of the pipe string, the string of pipe equipped with a pump, the lower column tubes in production well before placing the packer in C is hairouna interval filter production well, then produce planting packer, hermetically separating filter production well into two zones selection, initial and final, provide uniform heating of the steam chamber by the flow of fluid through the injection well, with the exception of break fluid and/or formation water at the pump inlet is carried out by adjusting the selection of the products to the pump inlet from the initial zone selection, and in the initial area selection, experiencing temperature peaks, the amount of product selection cut, for this input hole of the shank corresponding to the initial area selection is performed by reducing the bandwidth from the bottom to the mouth, and the side channels of the rod comply with the alternate message with one of the inlet holes of the shank in the initial area selection, which produce a limited longitudinal movement together of the column of tubes with a pump and piston rod relative to the shaft by increasing or reducing nozzles at the upper end of the tubing in relation to the distance between the input hole of the shank, and fixing the tubing at the wellhead of a production well in position and carry out the faceplate on the abutment flange and the bore of the shank corresponding to the destination zone selection is made in the form of an open end of the rod.



 

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1 dwg

FIELD: oil and gas industry.

SUBSTANCE: method involves construction of upper injection well and lower production well with horizontal sections located one above the other, pumping of heat carrier through horizontal injection well with warm-up of formation, creation of steam chamber and extraction of the products through horizontal production well, at which thermograms of steam chamber are picked up, state of the chamber warm-up is analysed for uniform warm-up and available temperature peaks. Considering the obtained thermograms there performed is uniform warm-up of steam chamber, thus changing the warm-up zones. During construction of wells their horizontal sections are equipped with filters. On the mouth of injection well the pipe string for pumping of heat carrier is equipped with pipeline with a gate valve, and outlet openings of pipe string are arranged in the filter, thus dividing it into warm-up zones so that heat carrier breakthrough to production well through the zone that has been warmed up to a greater extent is excluded. Heat carrier supply is controlled depending on the thermogram of steam chamber, which is picked up in production well. In injection well the filter is tightly separated into two warm-up zones made in its initial and end sections. Heat carrier is pumped to the formation via pipe string through the filter, first to final warm-up zone of productive formation, and as the final zone is being wanned up, the pumped steam volume is redistributed between initial and final warm-up zones of productive formation. To the pipe string of injection well there lowered is a stem with a plunger. During the pumping process, the space between pipe string and stem on the mouth of injection well is sealed. Stem with plunger is arranged opposite the first group of output openings of pipe string made on one and the same level along the perimetre of pipe string with increase in their carrying capacity at an angle of 270° between minimum and maximum outlet opening with possibility of their alternative opening and closing. The second group of openings is made in the form of an open end of pipe string. Heat carrier is pumped at constant steam flow rate supplied to pipe string of injection well. Ratio of volumes of heat carrier pumped to initial and final warm-up zones of heat carrier is changed owing to changing the heat carrier volume supplied to the first warm-up zone by means of restricted rotation from well mouth of the stem with plunger through an angle of 25° to 270° relative to the first group of outlet openings of pipe string.

EFFECT: increasing the efficiency of the method due to gradual development of deposits and avoiding direct breakthrough of heat carrier to production well.

4 dwg

FIELD: oil and gas industry.

SUBSTANCE: development method of heavy oil or bitumen mine field with control of heat carrier pumped to the well involves construction of upper injection well and lower production well with horizontal sections located one above the other, pumping of heat carrier through horizontal injection well with warming-up of formation, developing the steam chamber and extraction of product through horizontal production well, picking-up of thermogram of steam chamber, analysis of the warming state for uniform warming-up and availability of thermal spikes, and considering the obtained thermograms, uniform warming-up of steam chamber is performed by changing warming-up zones. At construction of wells, their horizontal sections are equipped with filters, and on the mouth of injection well the pipe string for pumping of heat carrier is equipped with pipeline with a gate valve, and outlet openings of pipe string are arranged in the filter, thus dividing it into warm-up zones so that heat carrier breakthrough to production well through the zone that has been warmed up to a greater extent is excluded; supply of heat carrier is controlled depending on steam chamber thermogram picked up in production well. In injection well the filter is tightly separated into two warm-up zones made in its initial and end sections, and outlet openings of pipe string are made opposite corresponding formation warm-up zones. Pumping of heat carrier to formation is performed simultaneously to both formation warm-up zones; at that, to the pipe string in injection well there lowered is stem with hollow plunger rigidly fixed on its end; space between pipe string and stem on the injection well mouth is sealed. Plunger is equipped with gauged openings with gradual increase in carrying capacity from the end of pipe string to well mouth or from well mouth to the end of pipe string with possibility of their alternative opening and closing. Each gauged opening is tightly arranged opposite one of outlet openings, which is made in pipe string and directed upwards, and the second outlet opening is made in the form of an open end of pipe string. Heat carrier is pumped at constant steam consumption; at that, ratio of volumes of heat carrier pumped to the first and the second warm-up zones is controlled owing to changing the volume of heat carrier supplied to the first warm-up zone by restricted axial movement of stem with hollow plunger and by changing carrying capacity of gauged openings with fastening of stem on well mouth.

EFFECT: increasing operating efficiency of steam chamber due to possible adjustable distribution of pumped steam volume; avoiding direct breakthrough of heat carrier from outlet openings of pipe string and filter of injection well to horizontal section of production well due to the fact that pipe string doe not have any outlet openings that are downward directed vertically to horizontal section of production well, reducing metal consumption and material and financial costs.

3 dwg

FIELD: oil and gas industry.

SUBSTANCE: development method of heavy oil or bitumen mine field with control of heat carrier pumped to the well involves construction of upper injection well and lower production well with horizontal sections located one above the other, pumping of heat carrier through horizontal injection well with warming-up of formation by developing the steam chamber and extraction of product through horizontal production well, picking-up of thermogram of steam chamber, analysis of the warming state for uniform warming-up and availability of thermal spikes, and considering the obtained thermograms, uniform warming-up of steam chamber is performed by changing warming-up zones. During construction of wells their horizontal sections are equipped with filters. On the mouth of injection well the pipe string for pumping of heat carrier is equipped with pipeline with a gate valve, and outlet openings of pipe string are arranged in the filter, thus dividing it into warm-up zones so that heat carrier breakthrough to production well through the zone that has been warmed up to a greater extent is excluded. Heat carrier supply is controlled depending on the thermogram of steam chamber, which is picked up in production well. In injection well the filter is tightly separated into two warm-up zones made in its initial and end sections. To the pipe string of injection well there lowered is a stem with a hollow plunger fixed on its end; during the pumping process, the space of heat carrier between pipe string and stem on the mouth of injection well is sealed; at that, outlet openings of pipe string are divided into two groups and correspond to initial and final warm-up zones of formation. The first group of outlet openings represents upward directed gauged openings of equal diameter d, which are made in the pipe string opposite initial section of filter with possibility of their alternative opening/closing by hollow plunger. The second group of openings is made in the form of a nozzle arranged inside the pipe string with outlet opening with diameter D. Total surface area of outlet openings with diameters d of the first group is larger than surface area of outlet opening with diameter D corresponding to the second group. Pumping of heat carrier to the formation is performed simultaneously to both warm-up zones of formation; at that, to initial section of filter there supplied is heat carrier volume that is by 1.5-2.5 times more than that supplied to the initial one, and as the productive formation is being warmed up, ratio of volumes of heat carrier supply to initial and final sections of the filter is changed depending on steam chamber thermogram. During operation of production well there controlled is carrying capacity of the first group of output openings opposite the first warm-up zone by means of conversion of stem rotational movement to restricted axial movement of plunger.

EFFECT: increasing steam chamber operating efficiency due to uniform generation of heavy fuel oil or bitumen by warming-up the initial warm-up zone of productive formation at the initial stage, avoiding direct breakthrough of heat carrier from outlet openings of pipe string and filter of injection well to horizontal section of production well, simplifying the technology and reducing metal consumption.

3 dwg

FIELD: oil and gas industry.

SUBSTANCE: method of fluid extraction from the well is performed in the following way: the first adjustment at least of the first well equipment for fluid production is performed; the first set of input parameters is chosen, which includes at least one parameter referring to serviceability degree at least of one second well equipment and sets of parameters chosen from the group including the data referring to efficiency, pressure, temperature, presence of the chosen reagent, content of water, content of sand and flow rate of injected chemical reagents. The first set of parameters is used to be entered to the computer model, and the second adjustment at least of one first well equipment is performed, which will provide at least extension at least of one second well equipment or increase in completed well flow rate. Also, control system of operation of electric submersible pump is proposed, which contains information storage data base relating to operating range of submersible pump, and processor for adjustment at least of one first well equipment, which has the possibility of using at least one measured operating parameter of submersible pump and information stored in the data base.

EFFECT: invention allows performing the monitoring of well shaft state and serviceability degree of various equipment and taking actions, which will provide increased or optimum production of hydrocarbons from the well.

25 cl, 4 dwg

FIELD: oil-and-gas industry.

SUBSTANCE: invention relates to production of natural gas ad may be used in methane-coal well development. Proposed method comprises perforation of operation string in interval of production bed and its hydraulic fracturing. Thereafter, operation string is flushed. Settled fluid level allows defining initial counter pressure on productive coal bed. Production tubing with borehole pump is lowered into flow tubing, the pump being located under perforation interval. Well head is sealed. Borehole pump is used to reduce fluid level in well annuity space to below perforation interval together with injection of buffer gas therein at initial counter pressure on the bed. Thereafter, feed of buffer gas is interrupted. Said fluid level in annuity space is maintained by means of borehole pump. Inflow of bed fluid is caused by releasing excess pressure of buffer gas from annuity space in control over variation in gas quantitative and/or qualitative composition at well head. Change in released buffer gas composition allows defining the beginning of coal methane from productive bed. Now, rate of buffer gas pressure release is decreased.

EFFECT: higher efficiency of well development.

4 cl

FIELD: oil and gas production.

SUBSTANCE: proposed method consists in using tubing incorporating borehole pump and packer. Note here that borehole pump is equipped with check valve. Check valve is arranged close to and above the pump on tubing outer side to allow one-way fluid flow from tubing into tube space. Said tube space is filled with process fluid with corrosion inhibitor in required concentration. Pressure in tube space is maintained not exceeding tolerable magnitude by means of electric-contact pressure gage connected to borehole pump control unit. Reagent if injected into tubing from wellhead with tube space gate valve.

EFFECT: efficient injection, safe production of oil or gas.

1 dwg

FIELD: oil and gas industry.

SUBSTANCE: according to the method of oil-gas wells killing on deep water subsea deposits by pumping of certain volume of kill composition together with sea water into the well thus providing creation of killing spout in the well with timeless pressure on formation exceeding formation pressure not less than 1.2 times, as a killing composition, preventing immediate contact of cold sea water with overheated formation fluids and productive stratum of formation, large hydrophobic disperse system is used with density exceeding density of sea water more than 5 times in the volume ensuring in bottom-hole zone of the well creation of spout of large hydrophobic disperse system with height exceeding productive stratum formation opened by perforation not less than 3 times. Mentioned disperse system is a disperse system with volume of 70%, where as disperse medium hydrocarbon liquid is used, this liquid doesn't set solid under temperatures to -10°C, its density is not less than 0.860 g/cm3; as disperse phase a mixture of hard metal balls with diameter within 1-2 mm is used, 50% of this ball mixture volume have fusion temperature well over bottom-hole temperature, and the other 50% of this ball mixture volume have fusion temperature 10°C and more below bottom-hole temperature.

EFFECT: improving reliability of oil-gas wells killing on deep water subsea deposits with excessive temperature and pressure of productive formation.

3 cl, 2 tbl

FIELD: oil and gas industry.

SUBSTANCE: typical well operating equipment can include separator for separation of water from oil, in which the produced mixture of fluid media is obtained and mixture is divided into the corresponding water and oil flows. Water flow can be pumped back to the well. For that purpose, well system for water pumping speed control back to the well can be developed. Group of inventions provides the improvement of well flow control efficiency. Essence of inventions: well equipment designed for receiving fluid medium flows through the first and the second fluid medium flow passage channels is arranged in the well. The above equipment includes flow separation control having the device connected to the first channel and the device connected to the second channel, which are interconnected. Outlet flows in the first and the second channels are controlled by means of the control.

EFFECT: increasing outlet flow in one of the first and second channels in response to increase in outlet flow in the other of the first and the second channels by means of action on one of the above devices to keep constant ratio of outlet flows in the above channels.

16 cl, 6 dwg

FIELD: oil and gas production.

SUBSTANCE: method includes gaslift well operation by adjusting the flow rate of working and produced gas. The withdrawal of produced gas is done by tubing string and additional tubing string. The flow rate of working and produced gas is adjusted by opening and closing of driven shut-off elements in accordance to the control signals. Control signals come from automatic control unit and are generated according to the results of measured values compared with set parameter values. Note that the pressure is measured in the mouth and bottom hole, at the same time the flow rate of produced gas is measured. The flow rate of working and produced gas is adjusted in such a way to provide the specified well operation mode.

EFFECT: increase of well operation efficiency, reduction of level and removal of fluid accumulated in bottom-hole zone, provision of well operation stability.

2 cl, 1 dwg

FIELD: oil and gas production.

SUBSTANCE: system for use in the hole includes the string designed for location in the hole that consists of submersible electric pump, the first part of inductive coupler and completion section. Note that completion section is located in the well zone under development and includes the second part of inductive coupler, isolating packer, detection cable and electric device electrically connected to the second part of inductive coupler. Note that detection cable goes through the packer for provision of sensors to some well zones.

EFFECT: increase of system operation efficiency and collection of measurement data referred to the well characteristics.

28 cl, 7 dwg

FIELD: oil and gas industry.

SUBSTANCE: well of hydrocarbon raw material deposit, either gas one or gas-condensate one, includes production string with tubing string with underground operating equipment. Operating equipment includes at least a cutout valve with remote control, which is provided with an actuator, and well head with wellhead equipment. Wellhead equipment comprises casing head, tubing head on which there mounted is X-tree in the form of a fir tree, which includes shutoff members - master and side gate valves with actuators, as well as throttle valve adjacent to the latter, which controls the well flow rate and is provided with an actuator, and monitoring and control members - fuse insert and gas line pressure monitoring valve. Well is connected to control station by means of shutoff members, throttle valve and cutout valve. Control station is made in the form of a cabinet and includes pump accumulator plant and at least one control unit per well.

EFFECT: improving reliability and accident-free operation of gas well and simplifying the control of processes.

12 cl, 5 dwg

FIELD: oil and gas industry.

SUBSTANCE: opening and closing of shutoff-control valves of well cluster is performed by independent supply of working medium to actuators of shutoff-control valves and underground cutout valves in the specified sequence, as well as valves controlling the flow rate of each well. Method is implemented by means of control station mounted in the cabinet and including instrumentation and control, as well as hydraulic system. Hydraulic system includes pneumatic hydraulic pressure accumulators combined with working medium tank, pumps, pressure controls and multiplying gears, and has the possibility of controlling actuators of shutoff-control valves with time delay and in certain sequence. At that, in addition, control lines of loop and flare gate valves are mounted in cabinet of the station, which are installed on pipelines in close proximity to control cabinet, for example on one common frame.

EFFECT: invention simplifies mineral deposit production control process, as well as allows reducing the area occupied with process equipment.

21 cl, 5 dwg

FIELD: oil and gas industry.

SUBSTANCE: single wells or wells forming clusters are drilled; production wells are equipped with wellhead equipment with X-tree including at least one side gate valve and one master gate valve, as well as underground cutout valve and throttle valve and monitoring and control members, which are installed on the loop, for example, fuse strip and gas line pressure monitoring valve. Operation of the well is performed at simultaneous control of production processes of hydrocarbons by means of the station. Control processes involve opening and closing of shutoff-control valves of well cluster by independent supply of working medium to actuators of shutoff-control valves, as well as flare and loop gate valves, which are arranged on pipelines in close proximity to control cabinet, for example on one common frame with control cabinet. Opening of shutoff-control valves of each well is performed in the following way: underground cutout valve, master gate valve, loop gate valve, side gate valve; closing is performed in the reverse order.

EFFECT: improving operating reliability of shutoff-control valves.

3 cl, 5 dwg

FIELD: mining industry.

SUBSTANCE: invention can be used in case of gas-lift operation of wells equipped by free piston-type installations. Invention envisages stopping well, connecting tube space and annular space in wellhead, recording bottom zone and wellhead pressures in tube and annular spaces, and computing well operation parameters using inflow curve plotted according to differences of bottom zone and wellhead pressures. Volume of produced fluid is found from potential output of formation and from condition of output of free piston. When comparing these volumes, parameters of well are computed in the base of minimum volume value.

EFFECT: optimized well operation.

2 dwg

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