Abstract: A parallel core simulation device for commingling production in low-permeability gas reservoirs includes a gas supercharger configured to provide a high pressure gas to simulate a fluid in a gas reservoir, a plurality of core holders arranged in parallel, a thermostat configured to control a temperature of each core holder to simulate a temperature of the gas reservoir, a pressure pump configured to control a pressure applied to each core holder to simulate a confining pressure of the gas reservoir, a first back-pressure valve communicated with each core holder, a fully-automatic gas meter configured to measure a rate and a volume of gas production and a second hydraulic pump configured to simulate a part of a gas well Christmas Tree.

Abstract: The present invention belongs to the technical field of oil and gas field development, and discloses a method for calculating a single-well controlled reserve of a low-permeability/tight gas reservoir and analyzing residual gas thereof. The method includes: calculating a reserve controlled by each gas well in a block by using a gas reservoir dynamic reserve calculation method; establishing a new reserve calculation formula for solution and comparative analysis by an example; and quantitatively analyzing an effect of a startup pressure gradient and a stress sensitivity on a calculation result of the single-well controlled reserve, wherein the analysis of the factors affecting reserve calculation shows that, when the startup pressure gradient reaches 0.02 MPa/m, the calculated reserve is significantly reduced compared with a conventional method, but when the startup pressure gradient is greater than 0.1 MPa/m, the effect gradually stabilizes.

Abstract: The present invention relates to a method for preparing a foamed thermoplastic polyurethane elastomer product, comprising the steps of: 1) coating a binder: coating the binder on the surfaces of expandable thermoplastic polyurethane elastomer particles; 2) curing and molding: adding the product obtained from step 1) to a mold and then placing it in a vulcanizing machine for curing and molding; and 3) cooling and setting: cooling the mold after the molding in step 2) to obtain the product of the present invention. By means of pre-coating the binder on the surfaces of expanded thermoplastic polyurethane elastomer particles according to the present invention, the weight of the binder can be reduced, and the properties of the expanded thermoplastic polyurethane elastomer particles can be utilized to the maximum extent.

Abstract: A process for preparing a TPU alloy material through in-situ compatibilization includes: 1) adding a premixed TPU raw material to a feeding port of a twin-screw extruder; injecting a mixture of an alloy component and a dual-active substance into the twin-screw extruder through a lateral feeding port; adding an auxiliary reagent to the TPU raw material or the mixture of the alloy component and the dual-active substance, wherein the alloy component is a polyolefin or a thermoplastic polymer material having reactivity, wherein the dual-active substance is a substance containing a group reactive with the TPU raw material and a group reactive with the alloy component, and the auxiliary reagent includes an initiator; 2) controlling a temperature of a reaction zone of the twin-screw extruder at 50° C. to 250° C., and granulating an extruded material by underwater cutting; and 3) drying the granulated product to obtain the TPU alloy material.

Abstract: A parallel core simulation device for commingling production in low-permeability gas reservoirs includes a gas supercharger configured to provide a high pressure gas to simulate a fluid in a gas reservoir, a plurality of core holders arranged in parallel, a thermostat configured to control a temperature of each core holder to simulate a temperature of the gas reservoir, a pressure pump configured to control a pressure applied to each core holder to simulate a confining pressure of the gas reservoir, a first back-pressure valve communicated with each core holder, a fully-automatic gas meter configured to measure a rate and a volume of gas production and a second hydraulic pump configured to simulate a part of a gas well Christmas Tree.

Abstract: The present invention belongs to the technical field of oil and gas field development, and discloses a method for calculating a single-well controlled reserve of a low-permeability/tight gas reservoir and analyzing residual gas thereof. The method includes: calculating a reserve controlled by each gas well in a block by using a gas reservoir dynamic reserve calculation method; establishing a new reserve calculation formula for solution and comparative analysis by an example; and quantitatively analyzing an effect of a startup pressure gradient and a stress sensitivity on a calculation result of the single-well controlled reserve, wherein the analysis of the factors affecting reserve calculation shows that, when the startup pressure gradient reaches 0.02 MPa/m, the calculated reserve is significantly reduced compared with a conventional method, but when the startup pressure gradient is greater than 0.1 MPa/m, the effect gradually stabilizes.

Abstract: A process for preparing a TPU alloy material through in-situ compatibilization includes: 1) adding a premixed TPU raw material to a feeding port of a twin-screw extruder; injecting a mixture of an alloy component and a dual-active substance into the twin-screw extruder through a lateral feeding port; adding an auxiliary reagent to the TPU raw material or the mixture of the alloy component and the dual-active substance, wherein the alloy component is a polyolefin or a thermoplastic polymer material having reactivity, wherein the dual-active substance is a substance containing a group reactive with the TPU raw material and a group reactive with the alloy component, and the auxiliary reagent includes an initiator; 2) controlling a temperature of a reaction zone of the twin-screw extruder at 50° C. to 250° C., and granulating an extruded material by underwater cutting; and 3) drying the granulated product to obtain the TPU alloy material.

Abstract: The present invention relates to a method for preparing a foamed thermoplastic polyurethane elastomer product, comprising the steps of: 1) coating a binder: coating the binder on the surfaces of expandable thermoplastic polyurethane elastomer particles; 2) curing and molding: adding the product obtained from step 1) to a mold and then placing it in a vulcanizing machine for curing and molding; and 3) cooling and setting: cooling the mold after the molding in step 2) to obtain the product of the present invention. By means of pre-coating the binder on the surfaces of expanded thermoplastic polyurethane elastomer particles according to the present invention, the weight of the binder can be reduced, and the properties of the expanded thermoplastic polyurethane elastomer particles can be utilized to the maximum extent.