四川含硫天然气超深井试油的实践与认识

PRACTICE AND KNOWLEDGE OF ULTRADEEP WELL PRODUCTION TEST FOR SULFUROUS NATURAL GAS IN SICHUAN

含硫天然气超深井试油是一项难度很大的技术，不断地总结过去超深井试油的经验，引进国外先进的试油技术和开展不懈的科研攻关，是当前试油工程的一项重要任务。为此，文中介绍了四川含硫天然气超深井试油的概况，总结了含硫天然气超深井试油的特点，目前比较成熟的工艺技术与装备和当前四川超深井试油的工艺技术水平，对超深井试油的技术难点进行了分析，提出了今后科研攻关的方向与主要内容。并提出以下观点和认识：在超深井试油中要早期介入；试油难度最大的是关井求压；含硫天然气井试油必须全面采取防腐技术；必须要有一整套能适应井下高温高压的井下工具、管柱与地面设备，编制一套适合本地区超深井试油的综合设计软件。

The ultradeep well production test for sulfurous natural gas is a very difficult technique and it is also an important task of production test engineering at present to unceasingly summarize the past experiences in ultradeep well production test,to introduce foreign advanced techniques of production test and to untiringly carry out scientific researches for the key problems.So that,this paper gives an outline of the ultradeep well production test for sulfurous natural gas in Sichuan,summarizes its properties and existing technological level as well as relatively ripe techniques and equipments,analyzes the technical difficulties in ultradeep well production test and proposes the trend and principal contents of scientific researches for the key problems in the future.The following view points and knowledge are also proposed,i.e.it should be early involved in ultradeep well production test;the most difficulty in production test is to acquire pressure through shutting in well;anti corrosion techniques must be overall adopted in the production test in sulfurous natural gas well;there must be a complete set of the downhole tools and pipe strings being able to suit the conditions of high temperature and high pressure as well as the surface equipments there and a set of comprehensive design software conforming to the ultradeep well production test should be drawn up.