实现变密度测井的一种新方法

以往常规的地面数控测井系统在采集、处理三组合变密度信号时，都利用变密度卡或者变密度模块，配合高速A／D卡进行处理。探讨了利用新的高速A／D卡，设计了RX．EXE变密度测井程序，以不同的操作键来改变3ft^*滑动门的位置、改变同步头门槛电压、改变门宽、进行声幅变密度刻度等，控制、调试了变密度波形及相关测井参数，配合测井软件，以软代硬，实现变密度测井的一种新方法。

A New Method for Variable Density Log

In the past, three-combination VDL(variable density log) signals provided by the computerized surface logging tool(e. g. , DF-I) were gathered and processed with the variable density card or module working together with the high speed A/D card. Instead of the card and module, we have worked out a variable density testing program---RX. EXE to set and calibrate VDL waves and log parameters, among which key-1 and key-2 are for changing 3-ft slide door position; key-3 and key-4 for 5-ft slide door position; key-5 and key-6 for threshold voltage of synchro-heads; key-7 and key-8 for door width, and key-C for calibration of acoustic VDL data. With a new high speed A/D card and working with the log software, we have successfully extracted and processed lots of three-combination VDL data.