FIELD: oil and gas industry.SUBSTANCE: gas treatment plant includes the inlet separator, the reflux exchager and the low-temperature separation unit. The gas/reduced condensate heat exchanger is installed before or after the inlet separator. The gas/low-temperature separation gas heat exchanger is positioned after the inlet separator, it is heated in the reflux exchager, which is made single-section. The unit is equipped with the condensate stabilisation unit.EFFECT: improvement of the traded gas and condensate quality.1 dwg

Gas treatment plant

FIELD: technological processes.SUBSTANCE: invention relates to low-temperature separation plants and can be used in the gas industry for the separation of natural gas transported along main gas pipelines. Proposed installation in both versions includes a drying unit, a compressor, a refrigerator, three expansion units, a recuperative heat exchanger, a reflux condenser and a demethanizer. First option also includes a separator. In operation of the first embodiment, the high pressure natural gas is drained and divided into two streams, the first stream is cooled in a recuperative heat exchanger and the second is compressed, cooled, reduced by a first expander and combined with the first expander. Combined stream is reduced with a second expander and sent to a reflux condenser where it is refluxed by countercurrent cooling from the low pressure gas supplied from the separator, which is then heated in a recuperative heat exchanger, mixed with the adsorbent regeneration gas supplied from the drying unit and discharged from the unit. Resulting reflux gas after reduction in the third expander is fed to the separator together with the methane-containing gas from the demethanizer. Wide fraction of light hydrocarbons is withdrawn from the bottom of the separator, which is mixed with a reflux from the bottom of the reflux condenser and subjected to fractionation in a demethanizer to produce liquid hydrocarbons or ethane and propane-butane fractions. Operation of the second embodiment is characterized in that a wide fraction of light hydrocarbons is not released from the gas stream after the third expander, only the phlegm is sent to the demethanizer, and the methane-containing gas is mixed with a low-pressure gas.EFFECT: increasing the yield of liquid hydrocarbons.2 cl, 2 dwg

Plant for the deethanization of natural gas (options)

FIELD: gas industry.SUBSTANCE: invention relates to gas treatment methods by low-temperature condensation and can be used in gas industry for ethane-butane fraction extraction under field conditions from gas condensate deposits well products. According to proposed method sour gas is separated at first stage with production of water condensate, which is removed, hydrocarbon condensate and gas, which are dried, dried gas is cooled with partially heated gas of third stage, reduced and separated into second stage under conditions of partial condensation due to cooling by third stage gas with production of condensate and gas, which are reduced and separated at third stage together with demethanization gas with production of gas, which is after heating removed as marketable gas, and condensate, which are demethanized together with first stage reduced dry condensate and second stage condensate with production of gas and Cfraction.EFFECT: technical result is elimination of hydrate formation inhibitor consumption and higher degree of ethane extraction.1 cl, 1 dwg

Method of well product field deethanization

FIELD: oil and gas industry.SUBSTANCE: invention relates to methods of modernization of installations of low-temperature separation of natural gas and can be used in gas industry. A method of modernization of the low-temperature gas separation installation is proposed, which consists in the installation on gas supply line of the inlet separation into the reduction unit of the dephlegmator, the upper and lower parts of which are connected to the low-temperature separation gas supply line, and exhaust line of phlegm is connected to the input separation condensate supply line. Door valve are arranged between connection points. In addition, a part of heat exchanger of the recovery unit cold is connected to the supply line of the reduced mixture of condensates into the unit, the degassing of the condensate after the reducing device and is placed in between the points of connection door valve.EFFECT: invention makes it possible to increase the degree of extraction of heavy hydrocarbons, improve the quality of gas preparation while reducing the inlet pressure.1 cl, 1 dwg

Method of updating installation for low-temperature gas separation

FIELD: oil and gas industry.SUBSTANCE: three-product gas treatment plant includes the inlet separator, the reflux exchanger, the reduction device and the low-temperature separator. There is the ejector equipped with the debutanization gas feeding line before the input separator. The recuperation heat exchanger and the reduction device are installed before the reflux exchanger. The low-temperature separator is connected by the deethanization gas and the condensate feeding lines to the deethanizer, equipped with the propane-butane fraction outlet line, connected to the condensate feeding line reflux exchanger, at which the reduction device is installed. The plant includes the reduction device and the debutanizer, equipped with the debutanization gas lines and the stable condensate outlet. The heat exchanger for cooling at least the part of the debutanization gas is placed at the condensate feeding line from the reflux exchanger between the reduction device and the deethanizer.EFFECT: expansion of the products range and the quality of the traded gas and condensate improvement.2 cl, 1 dwg

Three-product gas treatment plant

FIELD: oil and gas industry.SUBSTANCE: method includes wet gas separation at the first stage with the production of the water and HC condensates, and the first separation stage gas that is subjected to partial condensation due to counterflow cooling of the gas and condensate of the third separation stage with the production of gas and condensate of the second separation stage, as well as heated condensate of the third separation stage and commercial gas. The gas from the second separation stage is mixed up with weathering gas, its flow is restricted and separated with the production of the gas and condensate of the third separation stage, which are delivered as cooling agents to partial condensation of the gas from the first separation stage, at that the condensate of the third separation stage is delivered by a pump. The heated condensate of the third separation stage together with the hydrocarbon condensate of the first separation stage and condensate of the second separation stage are separated at a pressure close to the pressure of the first and second separation stages with the production of weathering gas, unstable condensate and water condensate. If necessary, in the gas line of the first and/or the second separation stage a hydrates inhibitor is injected, and the spent solution of the hydrates inhibitor is drained from the unit.EFFECT: increased output of commercial gas, improved recovery degree of heavy components, excluding ejection of weathering gas.2 cl, 1 dwg, 1 ex

Method of low temperature gas separation

FIELD: gas industrySUBSTANCE: invention relates to methods of field processing of hydrocarbon gases and can be used for preparation of associated oil gas in oil and gas industry Method for preparation of associated oil gas comprises gas compression and cooling of compressed volume, including under dephlegmation conditions and stabilization of phlegm to get compressed gas and condensate Gas is mixed with separation gas and compressed at least in two stages Compressed volume of last stage is cooled using as cooling agents of gas of low-temperature separation and the mixture of reduced condensate of low-temperature separation and a portion of the compressed gas of the last stage Condensate of the last stage is separated with production of separation gas and propane-butane fraction Part of compressed gas of one of the initial stages is withdrawn as fuel gas for gas-turbine drives, a part of compressed gas of the last stage is mixed with reduced condensate of low-temperature separation and heated at the last stage with production of fuel gas for communal general purposes Balance part of compressed gas of the last stage is reduced and separated with production of condensate and gas of low-temperature separation, that is heated at the last stage with production of fuel gas for gas piston drivesEFFECT: technical result is upgraded quality of compressed gas and condensate, as well as enlarging the range of products1 cl, 1 dwg

Method for preparation of associated petroleum gas

FIELD: oil and gas industry.SUBSTANCE: device for the low-temperature gas separation contains preliminary, intermediate and low temperature separator unit and reducing gas. As the two-piece intermediate separator set dephlegmator stabilizer comprising an upper and lower stabilizer deflegmation section equipped blocks thermal mass exchange elements with the internal space for passage of coolant or refrigerant and the external mass transfer space. Thus, the block of thermal mass exchange elements deflegamtion section consists of two parts, one of which is equipped with a supply line of the condensate of low temperature separation and connected with the zone supply line supplying heated condensate, which is adjacent to the feed line of the cooled gas pre-separator, while the other is equipped with a gas supply line low temperature separation and line output of marketable gas. Furthermore, the block of thermal mass exchange elements stabilization section equipped with input and output lines, the gas pre-separator, bottom section equipped stabilization line output stabilized condensate and deflegmation top section is equipped with gas outlet line intermediate separation. A method of low-temperature gas separation involves cooling gas pre-separator, its intermediate separation to obtain a condensate, and gas, which gas is cooled low-temperature separation, is throttled and subjected to low-temperature separation of gas output from the unit after heat and condensate. For low temperature separation using the apparatus, wherein the gas pre-separator is first cooled in the inner space block of thermal mass exchange elements stabilization section, then mixed with the heated condensate of low temperature separation and is separated in the middle of the dephlegmator-stabilizer for condensate, which is sent to stabilization section where stabilize for by heating the gas pre-separator and the gas that is directed to deflegmation section, where it is carried out under reflux further cooling and condensation of low temperature gas separation. Also, from the bottom of the stabilization section output stabilized condensate and from the top section deflegmation outputted cooled gas intermediate separation.EFFECT: technical result is to increase the output of marketable gas and lowering the dew point temperature of marketable gas.4 cl, 1 ex, 1 dwg

Kurochkin Andrej Vladislavovich

Papers

Method of low temperature gas separation

Gas treatment plant

Plant for the deethanization of natural gas (options)

Method for preparation of associated petroleum gas

Device for low-temperature gas separation and method thereof