Well logging

Well integrity logging

Objectives:

• Locating of casing and downhole equipment leaks;
• Determination of leak type: casing rupture, casing collar leak;
• Detection of behind casing fluid flows;
• Measuring casing wall thickness, physical wear;
• Evaluation of cement bond between casing and cement and rock and cement;
• Assessment of top of cement;
• Evaluation of cement density, evaluation of cement sheath behind the casing
• Locating collars, centralizers and other components of well design

Well integrity logging techniques and equipment:

• Casing integrity logging, detection of behind casing fluid flows (combination toolstring AKM-38, KSA-Т12, AGAT, SOVA, GEO, SAF spectral noise logging modules, GEO-MSHA);
• Sonic cement bond logging (MAK-42, KarSar AKC78, AK-73, MAK-2, MAK-7, MAK-9);
• Scanning sonic cement bond logging (MAK-9SK, MAK-4SK);
• Gamma ray/cement bond logging (SGDT-NVc, CM-8-12c, CM-3-4);
• Electromagnetic casing inspection (EMDST-MP, MID-K);
• Casing profile logging (multifinger imaging tool GF-24).

Well log examples:

Cement bond quality evaluation using sonic scanner MAK-9SK

Horizontal well logging together with spectral noise logging