The way to develop bitumen deposits

 

The invention relates to the oil industry, in particular to the development of bitumen deposits by thermal stimulation. Provides the ability to effectively displace the bitumen and thereby increasing the coefficient of extraction of bitumen due to the direct impact on bitumen and containing Sandstone, and by decreasing the size of the production cell to an optimal size, which virtually eliminates uncontrolled output directional heat flow through the tectonic cracks to bypass the bitumen layer in the mining element. The inventive method carry out the drilling of the injection wells. Into the formation brine. From the seam mined products. According to the invention first determine the optimal size of production of the element in the center of which are drilling the Central production well. Injection wells located at a distance of 10 m from the Central and 180° from each other. Provide directional talaphoto at the production well and the drainage hole with a bottom below bituminosa layer. At the same time placed her in close proximity to the Central production well and will be equipped with a submersible pump. what wells increase depending on piezoconductivity bituminosa Sandstone. Via the injection well serves the steam gas. Heat the reservoir to the mining viscosity of the bitumen and produce a selection of bitumen through the production well. After selection 1/3 of the volume of bitumen drainage water stop. The selection of the bitumen from the production well continue, create the effect of contour flooding and after cooling the lower part of the reservoir the cycle is repeated. 3 C.p. f-crystals, 3 ill.

The proposal relates to the oil industry, in particular to methods for extraction of bitumen by thermal effects on the formation of bituminosa sandstones.

There is a method of production of viscous oil or bitumen from the reservoir (see and.with. The USSR № 834339, CL E 21 In 43/24, publ. BI No. 20, 1981), comprising heating the formation by injection of coolant in it and gas, with subsequent heating of the reservoir gas is pumped periodically.

Also known thermal method of hydrocarbon production from bituminosa Sandstone (U.S. patent No. 4046195, publ. 06.09.77 year). The method includes injection via the injection well pair up until it will not go through the production well. Then is injected via the injection well a mixture of steam and a gas containing oxygen, at a temperature of the mixture corresponding to the saturation temperature of h is a group. The injection of the mixture continues until the reservoir together with a ferry you do not enter the optimal number of the specified gas in the range of 140-200 pore volumes under standard conditions. Then continue to pump clean pairs. Production of hydrocarbons produced through a production well.

Ways to reduce energy costs.

The disadvantage is low efficiency of extraction of bitumen, the lack of objective monitoring of the process of displacement. In addition, the methods are complex and time-consuming in execution.

The closest in technical essence and the achieved result to the present invention is a method of production of viscous petroleum from bituminosa Sands (U.S. patent No. 2019575, publ. 26.04.77 g), including the heating of the reservoir using wells, specially equipped, as well as many peripheral wells drilled in the reservoir near the production well. Peripheral wells open only the upper part of the reservoir. A production well shall be equipped with three columns, pipes, down concentric with one another.

Column very small diameter tubing) is lowered to the bottom of the reservoir, decoste wellbore packer. Intermediate column lowered into the well to the level of the packer. Thus, the three columns represent three of the communication channel with the surface: the first being oil, the second and the third (the annulus between the intermediate and lifting columns) are used to circulate the coolant, a pair that provides heating of the productive formation around the well.

The heating of the formation around the wellbore creates conditions for the beginning of the movement of oil in the reservoir. Simultaneously with this process is warming up the productive formation through the peripheral wells, which is pumped into the reservoir brine. Steam will be absorbed by the layer, provided that the bitumen in the stalk part of the wells will begin to move the layer down to her punching holes in the bottom of the column. The steam injected through the peripheral wells, heats the reservoir and simultaneously pushes the oil down the reservoir to the perforation holes.

The advantage of this method is that the process of displacement of bitumen stabilized by maintaining the temperature in the reservoir.

However, the displacement efficiency is low due to the fact that the process of distribution Talanov is their cost.

The objective of the invention is to provide a method effective displacement of the bitumen and thereby increasing the coefficient of extraction of bitumen due to the direct impact on bitumen and containing Sandstone, and by decreasing the size of the production cell to an optimal size, which virtually eliminates uncontrolled output directional heat flow through the tectonic cracks to bypass the bitumen layer in the mining element.

This object is achieved by the described method of mining bitumen deposits, including the drilling of the injection well, the injection of fluid into the formation and extraction of the product from the reservoir.

What is new is that you first determine the optimal size of production of the element in the center of which are drilling the Central production well, injection well located at a distance of 10 m from the Central and 180° from each other with directional teplopotok at the production well and the drainage hole with a bottom below bituminosa layer, and have it in close proximity to the Central production well and will be equipped with a submersible pump, and then through the drainage hole to produce the pumping produced water, drain layer is boron bitumen through the production well, after the selection 1/3 of the volume of bitumen drainage water stop, and the selection of the bitumen from the production well continue, create the effect of contour flooding and after cooling the lower part of the reservoir the cycle is repeated.

New is also that to create a directional heat flow injection wells supply pipe, a perforated sector of 90° of the circumference of the pipe. The number of drainage wells increase depending on piezoconductivity bituminosa sandstones.

When heating the bitumen layer by a known method, the main share of heat used for heating water, whose conductivity is higher than that of bitumen and mineral skeleton clayey Sandstone. In addition, because of the production well was previously mined bitumen together with water in the ratio of 30-20% 70-80% and due to the large difference of the coefficients of filtering water and bitumen, in the well was moved up a large amount of cold water reservoir, warm-up which also required a certain amount of heat. In the present method, a significant flow in heating of the formation water is practically eliminated. In a drained reservoir by creating a depression cone and cuts the level of groundwater which is the lowest heat. The number of drainage wells increase depending on piezoconductivity bituminosa sandstones.

In Fig.1 schematically shows the arrangement of wells in the implementation of the proposed method of development of bitumen deposits.

In Fig.2 - scheme of development of bitumen in the production item. This scheme is implemented in the North-Ashalchinskoye field in the Republic of Tatarstan.

In Fig.3 shows a system diagram of the industrial development of bitumen deposits mining elements.

The method is carried out in the following sequence.

Choose production element 2020 m, in the center of which are drilling vertical production well C-1-C. the Drilling of such wells the first is that in the well on the opened seams will begin unloading rock pressure, i.e., the vector discharge is directed toward the Central (mining) well and will coincide with the vector of thermal front, which in turn will accelerate the heat transfer on the bitumen layer. Then at a distance of 2-3 m are drilling a drainage hole-1-G at a depth of 10-15 m below the soles of bitumen reservoir and will be equipped with a submersible pump. Next, 10 m from the production wells are drilled injection wells, perforirovannoi in the sector of 90° of the circumference of the pipe and directed toward the production well C-1-C. Before the step of pumping fluid carry out drainage bitumen reservoir within the mining element through drainage wells-1-G, equipped with submersible pump 1 (Fig.2) with the estimated performance for complete drainage of bitumen reservoir.

The timing of drainage production cell with a radius of 10 m produced by the formula

R(t)=t,

where R(t) is the estimated radius of influence of the wells, m;

- petprepayment average Sandstone equal to 200 m2/day;

t - time drainage, day.

The number of drainage wells can be increased to 2 when petprepayment will be 300-500 m2/day. The optimal size of production of the cell determined by the capacity of the drainage layer in the data of geological and hydrogeological conditions and the power of modern drainage pumping equipment. The increasing size of the production cell will prevent complete draining of the reservoir, and when the partial drainage is impossible to get cost-effective heating of the bitumen in the reservoir optimal time. In addition NTA, as evidenced by the experience in Mordovo-Karmelicka field PB in the Republic of Tatarstan.

The formation of the depression cone is fixed the truncation level of the water in the heat pumping wells in the base bitumen reservoir.

Then begin the process of injection of the fluid into the wells C-1-T and C-2, After heating of the formation and achievements of the mining viscosity of bitumen begin by selecting bitumen swabbing of the production well. The process of drying takes place in a discrete mode. After heating of the bitumen in the reservoir to the optimal mining viscosity of the bitumen reservoir drainage is temporarily stopped, which leads to a pressure rise of groundwater. This in turn increases the amount of displacement of the heated bitumen due to natural energy discharge of groundwater, that is, the idea is contour flooding, widely used for pressure maintenance in oil production.

After completing the studies of the first switching element for the construction of two of the following elements adjacent to the borehole 2-T on the one hand and SLE. 1-T on the other, which will be used to heat the bitumen in 2 and 3, production elements and is carried out by turning heat pumping squareo ways to develop bitumen deposits is determined mainly by a significant reduction of energy consumption, reduction of thermal losses, control thermal state of a layer, increased extraction of bitumen due to the energy discharge of groundwater, reduction of costs for the dehydration of the extracted raw materials, reducing the cost of construction of the following production elements.

Claims

1. The way to develop bitumen deposits, including the drilling of the injection well, the injection of fluid into the formation and extraction of the product from the reservoir, wherein the first determine the optimal size of the Central first production element, in the center of which are drilling production well, injection well located at a distance of 10-12 m from the Central and 180° from each other with directional teplopotok at the production well and the drainage hole with a bottom below the bituminous layer, and have it in close proximity to the Central production well and will be equipped with a submersible pump, and then through the drainage hole to produce the pumping produced water, drain layer, and through the injection well serves the steam gas, heat the reservoir to the mining viscosity of the bitumen and produce a selection of bitumen through the production well, and after a known contour flooding and after cooling reservoir the cycle is repeated, then after testing the first element heat pumping well is used to heat the bitumen on the following two elements adjacent to the Central.

2. The method according to p. 1, characterized in that to generate directional heat flow injection wells supply pipe, a perforated sector of 90° of the circumference of the pipe.

3. The method according to p. 1, characterized in that at least develop a production direction of teplopotok in injection wells change.

4. The method according to p. 1, characterized in that the number of drainage wells increase depending on piezoconductivity of bituminous Sandstone.

 

Same patents:
The invention relates to the oil industry, in particular, to the development of deposits of heavy oil thermal methods in combination with various additives, for example surface-active substances

The invention relates to the oil and gas industry and improves the efficiency and safety of the process

The invention relates to the field of the oil industry, in particular to methods for the development of deposits of heavy oil and bitumen and can be used in the production of viscous oil and bitumen thermal stimulation

The invention relates to the oil industry and can be used in the development of deposits with residual heavy oil

The invention relates to the treatment of produced water from the installation of crude oil thermal method to achieve the level of recovery and recycling of water from more than 80 to 100% while achieving zero discharge

The invention relates to the oil industry and can be used when extracting high-viscosity oil or bitumen

The invention relates to the development of oil fields by thermal impact on the Deposit containing high-viscosity oil, improves the efficiency of oil recovery by increasing the coverage of the formation by thermal effects due to the sequential testing of the entire thickness of the layer, regardless of its structure

The invention relates to the oil and gas industry

The invention relates to the field of hydrocarbon production, in particular of gas hydrate deposits, and deposits of solid, for example bitumen, and high-viscosity hydrocarbons

The invention relates to the oil industry, in particular to the development of oil fields, and in particular to methods for the production of a viscous oil with the use of heat in combination with the drilling of horizontal wells

FIELD: oil extractive industry.

SUBSTANCE: method includes drilling of well and following concurrent heat treatment of productive bed and treatment by pressure waves. Well is drilled in parallel to ceiling or soil of bed. Acoustic properties of system ceiling-bed-soil are examined. Bed oscillation frequencies are determined. Acoustic characteristics of system ceiling-bed-soil are determined and concurrently heat and pressure waves treatment is performed in frequencies range containing spectrum of frequencies in resonance with frequencies of bed oscillations. Length of well is selected divisible by integer number of waves, direction of which is perpendicular to ceiling or bed soil, appropriately to analytical relation.

EFFECT: higher efficiency.

5 cl, 1 ex, 1 tbl, 2 dwg

FIELD: mining industry, applicable in opencast mining of mineral resources and hydraulic engineering.

SUBSTANCE: the method for formation of a deep-hole charge of a multi-component mixed explosive consists in impregnation of porous and crystal ammonium nitrate with liquid petroleum product and placement of the obtained explosive in the hole, formation of the mentioned deep-hole charge in its extension is accomplished with sections of various density of the explosive depending the physico-mechanical properties of the rocks located in the length of the hole, varying the density of the explosive by varying the mass percent relation of the quantity of granules of porous and crystal ammonium nitrate in the explosive compound, the mass percent of a granule of porous ammonium nitrate is within 54.5 to 71.5, a granule of crystal ammonium nitrate is within 20 to 40, liquid petroleum product - within 5.5 to 8.5, the granules of porous ammonium nitrate are used with sizes of 2.5 to 4.5 mm, and those of crystal ammonium nitrate - 0.7 to 1.3 mm, mineral oil is used as petroleum product.

EFFECT: provided optimized destruction of the rock in opencast mining of mineral resources and in building blasting operations.

3 cl

FIELD: oil and gas extractive industry.

SUBSTANCE: method includes inputting working environment under pressure along thermo-isolated pipeline into oil-bearing bed and extracting oil to the surface through inputting pipeline. As working environment easily-boiling liquid is used. It is fed along force thermo-isolated pipeline with reduction assembly and sprayer at end. Easily-boiling liquid is fed under pressure, enough for dispersing easily-boiling liquid on smallest drops and forming a foam of bubbles of easily-boiling liquid and oil from bed. It is fed into inputting pipeline placed coaxially outside force pipeline. Mixture of steam of easily-boiling liquid and oil is extracted to surface. Mixture is separated, oil is gathered, and steam of liquid is condensed for repeated use in well.

EFFECT: higher efficiency.

1 dwg

FIELD: oil and gas extractive industry.

SUBSTANCE: device has force and product pipelines, column of thermo-isolated pipes, steam generator. Steam generator is made in form of system for feeding easily-boiling liquid. Said system contains thermo-isolated force pipeline with reduction assembly for adjusting amount and pressure of easily-boiling liquid and sprayer. Sprayer serves for dispersing easily-boiling liquid on smallest drops and forming foam of mixture of bubbles of easily-boiling liquid steam and oil from bed. Also provided is compressor for raising foam, cooling machine for transferring steam of easily boiling liquid to liquid state. Inputting pipeline is placed coaxially outside the force pipeline. Output of input pipeline is connected to separator input, and separator output - to cooling machine input.

EFFECT: higher efficiency.

1 dwg

FIELD: oil and gas extractive industry.

SUBSTANCE: method includes drilling two-mouth horizontal well, fixing thereof by operation column, dragged from one mouth along shaft to another mouth together with packers for mounting the latter in ceiling of productive well, raising and feeding oil to output line on one of well mouths. Mouth portions of operation column are interconnected by ground-based portion in form of arced pipeline with identical inner diameter with forming of closed channel. Said ground-based portion of the latter is fixed on support frame of driving assembly. For it an additional column is placed in operation column, performing a function of tubing pipe in underground portion and having perforation channels for connection to productive layer. In hollow of additional column at even spaces from each other a system of cylindrical elements is mounted, interconnected via force tractions with forming of closed traction system. Portions of tubing column underground portion from well mouths to limits of operation column perforation portion together with said cylindrical elements form piston pump couples. During operation forced displacement of cylindrical elements system by driving assembly is performed with continuous consecutive pressing of oil from tubing column via above-mentioned piston pump couples.

EFFECT: higher efficiency.

5 cl, 1 ex, 3 dwg

FIELD: oil extractive industry.

SUBSTANCE: method includes first stages of capturing energy of processed heat from high pressure steam separator, placed below steam generators. Then transfer of heat energy into heated separator and evaporator and heat exchanger is performed for distillation of bed water present in oil-bearing bed and restoration of distillated water and concentrated salt solution or hard product. Concentrated water steam from heated separator is circulated through evaporator and heat exchanger to support from 1% to around 50% of steam mass in the flow, returning into heated separator, and prevent pollution and forming of scale. Equipment includes separator for processed low pressure energy, heated separator and steam compression with forced circulation circuit to produce distillated water.

EFFECT: higher efficiency.

6 cl, 2 ex, 1 tbl, 13 dwg

FIELD: oil and gas extractive industry.

SUBSTANCE: face-adjacent bed zone is heated by well electric heater and liquid is removed. Well is equipped with column of tubing pipes with perforated branch pipe at the end, separated by plug, with electric heater and pump below the plug. Branch pipe is positioned in zone of productive bed. Flow of liquid along inter-tubular space is limited by partial disengagement of inter-tubular well space at level of productive bed ceiling. Face-adjacent zone is heated with concurrent circulation of liquid along branch pipe below the cork and well space below disengagement location and feeding of water into inter-tubular space. Removal of liquid is performed with disabled heating and circulation of liquid.

EFFECT: higher efficiency.

1 ex, 1 dwg

FIELD: oil extractive industry.

SUBSTANCE: method includes cyclic differently-directed forcing of air as oxidizer. This is achieved by changing oxidizer forcing pressure and its volume, changing position of air forcing points, extraction of high-viscous oil or bitumen. Appearance of sign-alternating pressures between beds of different saturation provides for acceleration of capillary counter-flow saturation with water of zones with oil or bitumen, forcing gases into portions with oil or bitumen along small porous channels and transfer of oil or bitumen from heated areas along large porous channels. Change of direction of flows of gas of oil or bitumen between wells strengthens process of increase of area of effect of bed by bed inside burning. In such a way, use of stagnant areas is increased and bitumen extraction coefficient is increased.

EFFECT: higher efficiency.

1 ex, 1 tbl, 2 dwg

FIELD: oil industry.

SUBSTANCE: device has compressor machine and serially placed behind it screw pump, connected via pipeline to force well. Product well is connected to separator and collector, which is connected by water feed pipeline to compressor machine and pump. Gas space of separator is connected to input of compressor machine by gas feed pipeline.

EFFECT: higher efficiency.

3 cl, 2 dwg

FIELD: oil and gas industry.

SUBSTANCE: method includes cyclic forcing of cooling mixture into well-adjacent zone of bed and its freezing-unfreezing with following cumulative perforation, while as components of cooling mixture the following reagents are used: water - 68.3 % mass; ammoniac - 19.2 % mass; saltpeter - 12.5 % mass.

EFFECT: higher productiveness.

1 tbl

Up!