摘要
针对天然气井容易生成水合物并最终引起井筒或井口冻堵,需要进行水合物生成预测,并根据预测情况进行适当的防水合物措施。详尽地论述了水合物的形成条件以及影响因素,分析了查图法进行水合物预测的方法以及形成水合物的温度及压力的计算模型,包括已知压力求不生成水合物的最低温度和已知温度求生成水合物的最低压力的迭代公式,利用迭代公式自行编制了计算程序,并通过实例讲述了如何利用程序进行井口水合物生成预测计算,以及井筒内生成水合物井段的估算方法。
As natural gas wells are easy with hydrate formation and ultimately cause wellhead to be frozen or blocked, hydrate formation forecasts is needed, and anti-hydrate measures based on the forcast should be performed. This article discusses in detail the hydrate formation conditions and affecting factors, analyses hydrate predection method and the caculating models for hudrate formation temperature and pressure, including iterative formulas for calculating minimum temperature of hydrate no-formation according to the known pressure and calculating minimum pressure of hudrate formation according to the known temperature. By using the iterative formulas, caculating program has been worked out. Examples were given to show how to caculate hydrate formation in wellhead through the program, and the evaluational approaches for which well interval has hydrate formation.
出处
《钻采工艺》
CAS
北大核心
2008年第B08期91-93,共3页
Drilling & Production Technology
关键词
水合物
查图法
迭代公式
hydrate, investigation, iterative formula
