新型电极系、微电极组合测井仪在HH2530测井平台中的应用

Application of new electrode array and mini log combination tools in HH2530 logging system

利用HH2530测井平台信号的遥测传输模式,把电极系、微电极测井仪通过遥测编码的方式组合起来,把模拟测井信号转换成数字信号并通过遥测接口以双相移位键控码的形式上传数据,实现了电极系、微电极、井径测井仪组合测井的功能,极大地提高了测井时效。同时,在电路中使用了先进的电子技术,利用CPLD可编程数字电路模块对下井信号进行解码,控制下井仪器工作,并把上传数据进行并串转换,实现数据组合,在很大程度上简化了接口电路,降低了电路的故障率。经过现场试验,取得满意效果。

Both electrode array and mini log are important for the oil field development.These two tools usually have to run in hole separately due to equipment compatibility problem.If the measurement data of electrode and mini log could be combined by remote measurement and coding method through HH2530 logging system data transform,this problem could be solved.Electrode array,mini log and caliper data can be acquired in one run to improve the logging efficiency.Advanced electronics technique is utilized such as downhole signal de-coding by CPLD,downhole tool controlling,data uploading mode switching between parallel mode and serial mode.These techniques help reduce the interference circuit and reduce the failure probability.