碘量法测试在大牛地气田的应用与优化
The Application and Optimization of the Iodine Quantity Test in Daniu Diqi Field

碘量法是测试天然气硫化氢含量的重要方法，测试过程会存在滴定速率的影响、吸收速率的影响、吸收临界的控制、井口吸收不充分，冬季受限大，流量计与吸收液结冰等问题，通过大量实验分析各种影响因素，对装置进行改进，使用气瓶代替井口吸收，在室内通风环境下进行测试，控制滴定速率与吸收速率、用乙酸铬代替乙酸锌作吸收剂。实验证明，改进后的方法消除了上述影响，使测试结果更加准确有效。
The iodine quantity method is an important method for testing the content of natural gas sulfide. The test process will have an impact on the titration rate, the impact of absorption rate, the control of the absorption of critical, the good absorption of the well is large, the winter is limited, the flowmeter and the absorption solution knot Ice and other issues, through a large number of experimental analysis of various influencing factors, improve the device, use gas cylinders instead of the well absorption, test in the indoor ventilation environment, control the fixed rate and absorption rate, and use chromium to replace zinc acetate as an absorbent. Experiments have shown that the improved method eliminates the above effects and makes the test results more accurate and effective.