Water content in output crude oil is hard to measure precisely because of wide range of dielectric coefficient of crude oil caused by injected dehydrating and demulsifying agents.The method to reduce measurement error...Water content in output crude oil is hard to measure precisely because of wide range of dielectric coefficient of crude oil caused by injected dehydrating and demulsifying agents.The method to reduce measurement error of water content in crude oil proposed in this paper is based on switching measuring ranges of on-line water content analyzer automatically.Measuring precision on data collected from oil field and analyzed by in-field operators can be impressively improved by using back propogation （BP） neural network to predict water content in output crude oil.Application results show that the difficulty in accurately measuring water-oil content ratio can be solved effectively through this combination of on-line measuring range automatic switching and real time prediction,as this method has been tested repeatedly on-site in oil fields with satisfactory prediction results.展开更多
The gel point of crude oil is one of the important parameters for oil and gas field development, oil and gas storage and transportation.The conventional method can only measure the gel point of the crude oil free of g...The gel point of crude oil is one of the important parameters for oil and gas field development, oil and gas storage and transportation.The conventional method can only measure the gel point of the crude oil free of gas under atmospheric pressure.A new method for measuring the crude oil with dissolved gas under high pressure based on a new measurement principle was proposed.A new instrument of gel point measurement for crude oil with dissolved gas under high pressure was designed.The result measured by the new instrument was compared with that measured by the conventional method.The effect of pressure and solution gas-oil ratio on the gel point of crude oil was studied.Experiments showed that the results measured by the new instrument coincided with that by the conventional method for crude oil free of gas under atmospheric pressure.Under the same solution gas-oil ratio, the gel point of crude oil with dissolved gas increased with pressure, the gel point increased by 0.7℃ with 2.0 MPa pressure increment in the experimental conditions.The gel point of crude oil with dissolved gas decreased with solution gas-oil ratio under the same pressure, the gel point decreased by 1.0℃ with 10.0 m3·m-3 solution gas-oil ratio increment in the experimental conditions.The result is of importance to the management of waxy oil production and the design for oil and gas storage and transportation.展开更多
基金Sponsored by the Basic Research Fundation of Beijing Institute of Technology (200705422009)
文摘Water content in output crude oil is hard to measure precisely because of wide range of dielectric coefficient of crude oil caused by injected dehydrating and demulsifying agents.The method to reduce measurement error of water content in crude oil proposed in this paper is based on switching measuring ranges of on-line water content analyzer automatically.Measuring precision on data collected from oil field and analyzed by in-field operators can be impressively improved by using back propogation （BP） neural network to predict water content in output crude oil.Application results show that the difficulty in accurately measuring water-oil content ratio can be solved effectively through this combination of on-line measuring range automatic switching and real time prediction,as this method has been tested repeatedly on-site in oil fields with satisfactory prediction results.
文摘The gel point of crude oil is one of the important parameters for oil and gas field development, oil and gas storage and transportation.The conventional method can only measure the gel point of the crude oil free of gas under atmospheric pressure.A new method for measuring the crude oil with dissolved gas under high pressure based on a new measurement principle was proposed.A new instrument of gel point measurement for crude oil with dissolved gas under high pressure was designed.The result measured by the new instrument was compared with that measured by the conventional method.The effect of pressure and solution gas-oil ratio on the gel point of crude oil was studied.Experiments showed that the results measured by the new instrument coincided with that by the conventional method for crude oil free of gas under atmospheric pressure.Under the same solution gas-oil ratio, the gel point of crude oil with dissolved gas increased with pressure, the gel point increased by 0.7℃ with 2.0 MPa pressure increment in the experimental conditions.The gel point of crude oil with dissolved gas decreased with solution gas-oil ratio under the same pressure, the gel point decreased by 1.0℃ with 10.0 m3·m-3 solution gas-oil ratio increment in the experimental conditions.The result is of importance to the management of waxy oil production and the design for oil and gas storage and transportation.
