Research On Safe And Economic Operating Technology Of Yushulin Oil Field Surface Gathering System Pipeline

Oilfield gathering system skeleton pipeline is mainly for the oilfield produced crude oil conveying to the task of cleaning dehydration station.In order to guarantee smooth delivery of the product, often need to consume large amounts of heat, pressure on the transfer station for oil-water mixture to provide energy, much of the energy consumption in the form of heat and friction loss on the pipeline.Currently, elm forest late oilfield has entered high water cut development, oil field production decline, skeleton line gradually at the low throughput run stage, significant increase in oil consumption, the safety of the pipeline and economy are greatly reduced.Of in yushulin oil field development present situation and future development trend, to ensure the safe and economic operation of skeleton line as the goal, to carry out the following research work: oilfield gathering system skeleton pipeline is mainly for the carry crude oil from the oil field to the task of cleaning dehydration station.In order to guarantee smooth delivery of the product, often need to consume large amounts of heat, pressure on the transfer station for oil-water mixture to provide energy, much of the energy consumption in the form of heat and friction loss on the pipeline.Currently, elm forest late oilfield has entered high water cut development, oil field production decline, skeleton line gradually at the low throughput run stage, significant increase in oil consumption, the safety of the pipeline and economy are greatly reduced.Of in yushulin oil field development present situation and future development trend, to ensure the safe and economic operation of skeleton line as the goal, to carry out the following research work:Firstly, in order to "efficiency" and "loss rate", "tons of km heat loss", "tons of km pressure can damage", "tons of km energy loss", "hot loss rate", and rate of pressure loss of the "|", a total of 7 indicators on the skeleton in yushulin oil field pipeline operation energy consumption calculation and analysis, grasp the skeleton pipeline energy consumption patterns.Determine the pipeline under the conditions of different seasons spring transmission efficiency to an average of 70.1%, the summer is 74.3%, the fall of 73.6%, the winter is 68.4%, is affected by environmental conditions and throughput.Among them, the total energy loss in pipe, the heat loss rate is above 98%, accounting for a large proportion.Secondly, using the method of mathematical statistics, the optimal fitting study identified the different pipeline for the change law of heat transfer coefficient in different months and hydraulic friction coefficient of correction formula.On this basis, in order to prevent the coagulation of crude oil and pipe into the unstable workspace on the basis of the different skeleton calculate and determine the yushulin oil field pipeline under different moisture content in different months throughout the year, the minimum safety throughput, as a skeleton line parameters of low throughput pipeline operation safety.Skeleton pipeline is discussed, the actual throughput on the basis of the relative relationship between throughput and minimum safety, skeleton established yushulin oil field pipeline operation scheme of multi-level optimization method.Aiming at the condition of the actual throughput pipeline is greater than the minimum safety throughput, the minimum pipeline energy consumption as the goal, pipeline as decision variables, such as temperature, equipment combination plan, skeleton pipeline optimization mathematical model is established, and put forward the hierarchical optimization method is adopted in combination with genetic algorithm to solve.Calculation results show that by optimizing, compared to the original scheme can reduce the oil cost of skeleton line up to more than 30%.Application of the different skeleton pipeline optimization method made the yushulin oil field under different throughput, the moisture content in different months throughout the year of the oil solution.Actual throughput in skeleton pipeline is lower than the minimum safety throughput, aiming at the lowest cost of the total oil, water for decision variables, established the skeleton of filling water pipe conveyor running parameter optimization mathematical model and algorithm, and the skeleton far end in the different areas of the pipe hydrating scheme is optimized, determine the optimal filling water.In the case of pipeline throughput further reduce, established the mathematical model of skeleton optimization of pipeline, comparison and analysis the filling water conveying pipeline and oil tank truck pull two types of oil, is determined under different moisture content, different skeleton pipeline filling water transmission and fuel oil transfer way limits throughput.The above research can not only for gathering system skeleton pipeline safe and economic operation to provide important technical guidance and support, but also expand the low throughput pipeline hydraulic, thermal analysis and optimization technology of related theory research.