天然气水合物预测及管线注醇工艺优化计算  

Prediction of gas hydrate formation and optimization calculation of alcohol injection process in pipeline

作　　者：康俊鹏 王寿喜[2] 张振涛[3] 张高 KANG Jun-peng;WANG Shou-xi;ZHANG Zhen-tao;ZHANG Gao(Shaanxi Energy Institute,Xianyang 712000,Shaanxi Province,China;College of Petroleum Engineering,Xi′an Shiyou University,Xi′an 710065,Shaanxi Province,China;Tarim Oilfield Company of CNPC,Korla 841000,Xinjiang,China)

机构地区：[1]陕西能源职业技术学院,陕西咸阳712000 [2]西安石油大学石油工程学院,陕西西安710065 [3]中石油塔里木油田公司,新疆库尔勒841000

出　　处：《化学工程》2023年第1期90-94,共5页Chemical Engineering(China)

基　　金：陕西能源职业技术学院院级科研项目(2020KYP03);陕西省教育厅专项科研计划项目(18JK0175);陕西省科技统筹创新工程项目(221516001)。

摘　　要：管线中有水合物生成时会造成管线堵塞,仪表失灵、压力升高等事故,严重影响气田的安全生产,通过注入甲醇抑制剂可以有效减小管线的冻堵概率。现场研究发现,目前注醇工艺盲目粗放,导致甲醇消耗量过大,通过对水合物生成热力学模型进行研究,采用C++编程语言计算试验压力下水合物的生成温度,与实验数据进行对比,确定最佳的水合物预测方法Makogon模型;以此模型为基础计算管线实际运行时的水合物生成温度,然后结合管线产水量、产气量等运行数据采用John Carroll模型计算甲醇抑制剂的消耗量。最后通过现场试验,验证了计算成果的实用性和经济性。The formation of hydrate in the pipeline will cause pipeline blockage,instrument failure,pressure increase and other accidents,which will seriously affect the safe production of the gas field.By injecting methanol inhibitors,the probability of pipeline freezing can be greatly reduced.Field studies have found that the current alcohol injection process is blindly and extensively,resulting in excessive methanol consumption.The thermodynamic model of hydrate formation is studied to use C++programming language to calculate the hydrate formation temperature under test pressure,and compares with the test data to determine the best hydrate prediction method Makogon model.Based on this model,the hydrate formation temperature is calculated during actual pipeline operation,and then John Carroll model is used to calculate the consumption of methanol inhibitor based on the pipeline water production,gas production and other operating data.Finally,the practicability and economy of the calculation results are verified by field tests.

关 键 词：水合物 集输管线 甲醇抑制剂 

分 类 号：TE832[石油与天然气工程—油气储运工程]