RU2596777C1 - Method for construction of the cluster site housing of initial water separation - Google Patents

Abstract

FIELD: oil and gas industry.

SUBSTANCE: invention relates to equipment for oil industry. Cluster site of the wells is selected, after that the place for construction of the cluster site housing of initial water separation is selected, flow rates of the cluster site development wells and physical-chemical properties of extracted products are measured. Amount of water to be reset on the cluster site, required pump diameter and depth, and a number of bore pits are measured, rotary drilling is performed with direct flushing of clay solution under the conductor. Drilled out rock is collected, is lowered, the conductor made of the tubes is fixed and cementing of annular space is performed, perform rotary drilling with direct flushing of clay solution under the production string, casing pipe is lowered and fixed, cementing of casing pipe string annulus is performed. On the upper part of the casing pipe an adapter is mounted, production trees are installed on inner string and tubular insert, production tree is mounted and hydraulic tests of bore hole at pressure are performed.

EFFECT: invention enables to increase efficiency of the cluster site.

3 cl, 2 dwg

Description

The invention relates to the field of equipment for the oil industry, and in particular to methods of building a hull of a cluster installation for preliminary dumping of produced water at oil fields of a late stage of development, and can find application in pressurized systems for the production and collection of oil wells.

A known method of building a hull of a cluster installation of preliminary water discharge, where a capacitive sump with a coalescing filter is used / Technology of a cluster discharge and treatment of produced water / N.G. Ibragimov, F.R. Gubaidullin, C.H. Sudykin, R.Kh. Sayetgaraev, A.I. Ryzhikov // Oil industry. - M. - 2013. No. 7. - S. 52-65 /.

The disadvantage of this method is the lack of efficiency due to the low productivity of the preliminary discharge of water, a significant occupied area, which usually requires additional land allocation, and the possibility of freezing in the winter when stopping production wells of the bush.

The closest technical solution for the combination of essential features to the claimed invention and selected as a prototype is a method of constructing a body of a cluster unit for preliminary water discharge, where a well pad is selected where it is necessary to discharge part of the produced water along the way, and a place is chosen for building a body of a preliminary unit for pre-discharge water discharge, measure the flow rates of producing wells at the cluster site and the physicochemical properties of the produced products, in which a well is used as a casing, plugged by a packer above the perforation zone / Downhole installation of water discharge for well clusters / V.F. Shayakberov // Equipment and technologies for the oil and gas complex. M .: VNIIOENG OJSC. 2009. No3. S. 15-16 /.

The disadvantage of this method is the lack of efficiency due to the low productivity of the preliminary discharge of water due to the small diameter of the well.

The aim of the invention is to increase efficiency.

This goal is achieved by the fact that in the inventive method of building a casing of a cluster installation of a preliminary discharge of water, where a well cluster site is selected where it is necessary to discharge part of the produced water along the way, a place is chosen for building a housing of a cluster installation of a preliminary water discharge, and the flow rates of producing wells of a cluster site are measured and physico-chemical properties of the produced products, in which the casing is a pit with fountain fittings, determine the amount of water that needs to be discharged b on the well pad, determine the required diameter and depth and number of pits, rotary drilling with direct clay mud washing under the conductor with a three-cone bit with a central washing system, drill bit is collected into the sludge tank, the conductor is lowered and fixed from the pipes and the annulus is cemented from shoe to the mouth, expect the hardening of cement, produce rotary drilling with direct washing with clay mud under the production casing, collect the drilled rock sludge tank, lowering and securing the production pipe, cementing the annular space of the production casing with a pump through technological holes in the lower part of the production casing, expect solidification of cement, install an adapter on the upper part of the production casing, whose lower diameter is equal to the diameter of the production casing and the upper diameter is diameter of the fountain fittings, install the inner column and pipe insert on the fountain fittings using wedges, mount f ontanny armature and carry out hydraulic tests of a pit at a pressure that is not lower than the pressure in the collector of the cluster pad. In addition, in some cases, the place for the construction of a cluster unit for preliminary discharge of water is chosen within the boundaries of the well pad. In addition, in some cases, drilling fluid is used for flushing.

The execution of the body in the form of a pit with fountain fittings can increase efficiency, since it can have a larger diameter than the well, which provides increased productivity for water discharge.

Determination of the amount of water that needs to be discharged at the well pad allows to reduce the volume of ballast pumping and reduce the area of aggressive corrosion, which allows to increase efficiency. The diameter and depth of the pit are determined taking into account the required lengths and diameters of the inner column and pipe insert, as well as the dimensions of the equipment used.

Determination of the required diameter and depth of the pit allows to reduce the volume of ballast pumping and reduce the area of aggressive corrosion, which allows to increase efficiency.

The determination of the number of pits is carried out if one pit from the produced production pipes does not allow for the discharge of the required amount of water at the cluster site, which allows to reduce the volume of ballast pumping and reduce the area of aggressive corrosion, which allows to increase efficiency.

The production of rotary drilling with direct washing with clay mud under the conductor with a three-cone bit with a central washing system allows you to set the direction of the production casing from production pipes while eliminating surface contamination with raised rocks, since clay mud is used, which improves the efficiency of fixing the walls of the well in sandy, water-saturated soils and removal of drilled rock.

The collection of drilled rock in a sludge tank eliminates surface contamination.

Performing the descent and fixing of the conductor from the pipes, cementing the annulus from the shoe to the mouth and waiting for the cement to solidify allows you to specify the direction of drilling the production string from production pipes.

The production of rotary drilling with direct washing with clay mud under the production casing eliminates surface contamination with raised rocks, since clay mud is used, which improves the efficiency of fixing the walls of the well in sandy, water-saturated soils and removal of drilled rock.

Running and securing the production pipe, cementing the annular space of the production casing with a pump through the technological holes in the lower part of the production casing and waiting for the cement to solidify allows you to build the underground part of the casing of the cluster unit for preliminary water discharge, which improves efficiency.

Mounting on the upper part of the production casing of the sub, in which the lower diameter is equal to the diameter of the production casing and the upper diameter is equal to the diameter of the fountain fittings, allows for the construction of the ground part of the hull of the cluster unit for preliminary water discharge, which ensures increased efficiency.

Installation on the fountain reinforcement of the inner column and pipe insert, using wedges, allows you to perform the working part of the housing.

Mounting the fountain fittings allows you to build the ground part of the body of the cluster installation of preliminary water discharge, which provides increased efficiency.

Conducting hydraulic tests of the casing at a pressure that is not lower than the pressure in the prefabricated collector of the well pad allows to ensure operation at the pressure existing on the well cluster, which ensures increased efficiency.

The choice of a place for the construction of a cluster installation of preliminary water discharge within the boundaries of a cluster well site allows more efficient use of the territory of a cluster site, thereby increasing efficiency.

The use of drilling fluid for flushing the drilling fluid during drilling of large depth casing allows to provide the rise to the surface of the drilled rocks, if they are heavy.

The inventive method of constructing a body of a cluster plant for preliminary water discharge is carried out by the following sequence of operations:

1) choose a well pad where it is necessary to discharge part of the produced water;

2) select a place for the construction of the body of the cluster installation of preliminary water discharge;

3) measure the flow rates of producing wells at the cluster site and the physicochemical properties of the produced products;

4) determine the amount of water that needs to be dumped on the well pad;

5) determine the required diameter, depth and number of pits;

6) carry out rotary drilling with direct washing with a clay solution under a conductor with a three-cone bit with a central washing system;

7) collect the drilled rock in a sludge tank;

8) lower and fix the conductor from the pipes;

9) carry out cementing of the annulus from the shoe to the mouth;

10) expect cement to harden;

11) produce rotary drilling with direct washing with clay mud under the production casing;

12) collect the drilled rock in a sludge tank;

13) lower and fix the production pipe;

14) cement the annular space of the production casing with a pump through technological holes in the lower part of the production casing;

15) expect cement to harden;

16) an sub is mounted on the upper part of the production casing, in which the lower diameter is equal to the diameter of the production casing, and the upper diameter is equal to the diameter of the fountain fittings;

17) install on the fountain fittings the inner column and pipe insert using wedges;

18) mount fountain fittings;

19) conduct hydraulic tests of the pit at a pressure that is not lower than the pressure in the collector of the cluster pad;

20) a place for the construction of a cluster unit for preliminary discharge of water is chosen within the boundaries of the cluster well site;

21) use drilling fluid for flushing.

One possible embodiment of a device for implementing a method for constructing a body of a cluster unit for preliminary water discharge is shown in FIG. 1 and 2.

A device for implementing the method for constructing a body of a cluster unit for preliminary water discharge includes a three-cone bit 1 mounted on a drill string 2, a sump with drilling fluid 3 and a mud pump 4. A production casing 6 is installed inside the conductor 5. The annular spaces of the conductor 5 and production casing 6 are cemented 7 and 8, respectively. The inner column 9 is located inside the tube insert 10. The inner column 9 and the tube insert 10 are fixed with wedges 11 to the fountain fittings 12. The production column 6 and fountain fittings 12 are connected by a sub 13.

A device for implementing the method of constructing a hull of a cluster plant for preliminary water discharge works as follows. The mud pump 4 feeds the mud through the drill string 2 into the three-cone bit 1, providing its rotation for drilling. Clay mud is returned to the sump with drilling mud 3. Upon reaching the depth required to install the jig 5, stop the mud pump 4 and raise the three-cone bit 1. Lower the jig 5 and fix it and cement the annulus 7 and wait for the cement to solidify. Then the three-cone bit 1 is lowered into the conductor 5. The mud pump 4 feeds the clay solution through the drill string 2 into the three-cone bit 1, providing its rotation for drilling. Clay mud is returned to the sump with drilling mud 3. Upon reaching the depth required to install production casing 6, stop the mud pump 4 and raise the three-cone bit 1. Lower production casing 6 and cement it, annular cementing 8 is cemented and cement is set. The sub 13 is fixed on the production casing 6. The inner casing 9 and the pipe insert 10 are installed on the fountain reinforcement 12 using wedges 11. The fountain reinforcement 12 is mounted on the sub 13. Hydraulic tests are carried out.

Thus, the inventive method of constructing a hull of a cluster plant for preliminary water discharge improves efficiency.

Claims (3)

1. The method of building the hull of the cluster installation of the preliminary discharge of water, where the well cluster site is selected, where it is necessary to discharge part of the produced water along the way, select the place for the construction of the body of the cluster installation of the preliminary water discharge, measure the production rates of the producing wells of the cluster site and the physicochemical properties of the produced products, characterized in that the casing is a pit with fountain fittings, determine the amount of water that needs to be dumped on the well pad, determine the required diameter and depth and number of pits, perform rotary drilling with direct washing with clay mud under the conductor with a three-cone bit with a central flushing system, collect the drilled rock in the sludge tank, lower and fix the conductor from the pipes and cement the annulus from the shoe to the mouth, expect solidification cement, rotary drilling is carried out with direct washing with a clay solution under the production casing, the drilled rock is collected in a sludge tank, lowered and fixed casing pipe, cement the annular space of the production casing with a pump through technological holes in the lower part of the production casing, expect cement to harden, install an adapter on the upper part of the casing, whose lower diameter is equal to the diameter of the production casing and the upper diameter is equal to the diameter of the fountain fittings, set to for fountain fittings, the inner column and pipe insert with wedges, mount the fountain fittings and conduct hydraulic tests I casing at a pressure that is not lower than the pressure in the prefabricated manifold of the cluster pad. 2. The method of building the hull of a cluster installation of preliminary water discharge according to claim 1, characterized in that the place for the construction of a cluster installation of preliminary water discharge is chosen within the boundaries of the well pad. 3. The method of construction of the hull of a cluster installation of preliminary water discharge according to paragraphs 1 and 2, characterized in that the drilling fluid is used for flushing.

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