RU2158164C1 - Plant for preparation of well production - Google Patents

Abstract

FIELD: oil refining industry; preparation and separation of gas-water-oil mixture at gathering and preparation of well production in fields. SUBSTANCE: proposed plant includes separator, dampening collector, depulsator, gas- and-liquid mixture supply pipe line and gas, oil and water discharge pipe lines. Plant is provided with oil heater, horizontal tube reamer, mass- exchange collector with water drainage sump, pipe lines for discharge of gas from tube reamer and bypassing of its to mass-exchange collector, as well as for return of gas to oil pipe line and discharge of water from tube reamer and water drainage sump. EFFECT: possibility of discharging gas and water from all points of plant where they are present in free state, thus reducing volume of liquid prepared in plant, unloading the pumps, reducing the pressure and increasing oil production. 2 cl, 1 dwg

Description

 The invention relates to the refining industry, in particular to installations for the preparation and separation of gas-oil mixtures during the collection and preparation of well products in the fields.

 A known installation for separating a gas-oil mixture, including a stilling section, a depulsator, a horizontal cylindrical tank and a pipeline for taking free water from a stilling section (SU 1005820 A, 03/23/1983).

 The disadvantage of this installation is the impossibility of complete removal of gas and water from the production of wells.

 Closest to the claimed installation is a well preparation unit, including a stilling section, a depulsator, a horizontal cylindrical tank, a pipeline for taking free water from the stilling section, a pipe connected to a pipeline for taking free water from the stilling section and valves installed on the pipelines (SU 1068140 A, 01/23/1984).

 The disadvantage of this installation is that it is designed for preliminary separation of water at booster pump stations (BPS), remote from the central treatment points (CPS), which, when transporting pre-prepared oil from the BPS, leads to corrosion of pipelines, aging of the emulsion, as well as to an increase energy costs, metal consumption, reagent consumption.

 The objective of the proposed technical solution is to create a unit for the preparation of well products, capable of preparing oil at the place of its production.

 The technical result consists in achieving a more complete removal of gas and water from the production of wells at the BPS directly in the area of the location of oil production from the wells, as well as in improving the quality of product preparation.

 The specified technical result is achieved in that the installation of well production, including a separator, a still reservoir, a depulsator, pipelines for supplying a gas-liquid mixture and for discharging gas, oil and water, according to the invention is equipped with an oil heater, a horizontal pipe expander, a mass transfer manifold with a water collector, gas exhaust pipelines from a pipe expander and transferring it to a mass transfer manifold, a gas return pipeline to an oil pipeline, as well as water discharge pipelines from a pipe expander and a catchment basin.

 The installation can be equipped with a multiphase pump.

 This installation allows you to drain gas and water from all points of the installation, where they are present in a free state, which leads to a multiple reduction in the volume of liquid prepared in the installation, unloading the pumps, reducing pressure and increasing oil production.

 The invention is illustrated by the installation of the preparation of well products.

 A well preparation plant includes a cylindrical separator (sump) 1, which separates oil, a soothing reservoir 2, designed to average flow and pressure pulsations, an oil heater 3 with a coolant, a depulsator 4 for gas pre-sampling, a horizontal pipe expander 5 with a slope of ≥ 0, 5D, where D is the diameter of the expander made with a pipeline 6 for gas removal and its transfer to the gas-liquid mixture line (GHS) after the heater and pipeline 7 for collecting free water, mass a manifold 8 for stabilizing the flow after returning gas to it from the pipe expander, a gas separator 9 for purifying the gas from the dropping liquid, a gas outlet pipe 10 from the depulsator to the oil pipeline, a gas outlet pipe 11 from the separator to the oil pipeline, a formation water treatment unit 12, a filter unit 13 located on the GHS supply line, a water collector 14 installed on the final section of the mass transfer manifold, a multiphase pump 15 for pumping the prepared oil to the consumer.

 Installation works as follows.

 GHS with a reagent through a filter 13 is supplied to a stilling collector 2 for averaging flow and pressure pulsations and enters a pipe flow expander 5 made with a pipe 6 through which gas is discharged and returned to the mass transfer manifold 8, and a pipe 7 through which free water is discharged without getting into the oil heater 3 and the separator-sump 1.

 The partially separated mixture is sent to the oil heater 3 and then through the mass transfer manifold 8, where the GHS flow stabilizes after gas is returned to it, to a depulsator 4 made with a gas exhaust pipe 10 through which gas is discharged to the gas separator 9. Free water accumulated in the mass transfer the collector 8, is discharged through the catchment 14 installed on the final section of the collector.

 Further, the mixture enters the three-phase separator-settler 1 for the separation of gas and the separation of gas and water. Then, the diverted gas is returned to the oil pipeline, the water is sent for purification, and the refined oil is received at the multiphase pump 15. The gas enters the gas separator 9 for purification of the dropping liquid, while part of the gas is used for own needs, and the bulk of it is returned to the oil the pipeline is also to receive a multiphase pump 15.

 The separated formation water enters the treatment unit 12, consisting of an inkjet device — a flow destabilizer and a settler. After purification, water arrives at the reception of a block cluster pumping station.

 The proposed installation implements the principle of continuity of product separation without the use of multi-stage gas separation and water separation, due to which the circuit does not include control and throttling elements that interrupt the separation process and are mixing elements.

 The unit also eliminates the burning of oil gas and ensures the preservation of light valuable hydrocarbons by returning gas to a pump for joint transport with the prepared oil to a point where it can be used by the consumer.

 Thus, the use of the proposed installation for the preparation of well products will relieve its main components and increase the productivity of oil production.

Claims (2)

 1. Installation of well production, including a separator, a stilling reservoir, a depulsator, pipelines for supplying a gas-liquid mixture and for removing gas, oil and water, characterized in that it is equipped with an oil heater, a horizontal pipe expander, a mass transfer manifold with a water collector, and pipelines for removing gas from the pipe the expander and transferring it to the mass transfer manifold, a gas return pipe to the oil pipeline, as well as pipelines for draining water from the pipe expander and the catchment.  2. Installation according to claim 1, characterized in that it is equipped with a multiphase pump.