电测是用电缆的长度来计算深度,钻井、下封隔器、打水泥塞等是用钻杆或油管(统称管柱)的长度来计算深度。这样,对同一井深就有两种深度。由于电缆与管柱结构不同,测量及操作皆不同,故测得的井深就存在差值。井越深,差值越大。如我国第一口超深井——女基井,电测井深6022m,管柱井深为6011m。电测与管柱深度的差值对试油和修井作业是个应注意的影响因素。在两目的层间夹层比较厚的情况下,可粗略考虑这个差值。反之,在两目的层间夹薄层的时候打水泥塞或坐封隔器时,则必须认真考虑这个差值,否则,就有可能将封隔器坐在射孔 Electrical measurement is the length of the cable to calculate the depth of drilling, the next packer, cement plug, etc. is the use of drill pipe or tubing (collectively referred to as the length of the column) to calculate the depth. In this way, there are two depths for the same depth. Due to the different cable and column structure, measurement and operation are different, so there is a difference between measured depth. The deeper the well, the greater the difference. As China’s first ultra-ultra-deep wells - female base wells, electrical logging depth 6022m, column depth of 6011m. The difference between the electrical measurement and the depth of the column is a factor that should be paid attention to for the test oil and workover work. In the case of thicker interlayers between two layers, this difference can be roughly considered. Conversely, when cementing a plug or packer with a thin layer between the two layers, the difference must be carefully considered; otherwise, it is possible to sit the packer in the perforation