Well video log­ging is a mod­ern inves­ti­ga­tion tool used for new, oper­at­ing, con­served, and aban­doned arte­sian, ther­mal, oil, and gas wells. Thanks to tech­no­log­i­cal advances, the well own­er can visu­al­ly inspect the well­bore at depth and assess the integri­ty of the cas­ing, scale formed by pre­cip­i­ta­tion of dis­solved chem­i­cal com­po­nents in ground­wa­ter, the con­di­tion of the bot­tom-hole zone, slot fil­ters, or per­fo­ra­tion inter­vals. Video log­ging also makes it pos­si­ble to iden­ti­fy for­eign objects inside the well that may hin­der its oper­a­tion.

Geo­log­i­cal inves­ti­ga­tion of sub­sur­face reser­voirs is a key stage in oil and gas explo­ration and pro­duc­tion. To obtain high-qual­i­ty infor­ma­tion on geo­log­i­cal for­ma­tions and their prop­er­ties, var­i­ous meth­ods and tech­nolo­gies are applied. One of these advanced meth­ods — well video log­ging — pro­vides high-qual­i­ty visu­al infor­ma­tion about sub­sur­face struc­tures and helps to bet­ter under­stand com­plex geo­log­i­cal con­di­tions. The works are car­ried out in accor­dance with the require­ments of the Order of the Min­istry of Region­al Devel­op­ment and Con­struc­tion of Ukraine No. 511 dat­ed 16.12.2010 “On Adop­tion of the Nation­al Stan­dard DSTU‑N B V.1.1–27:2010 Pro­tec­tion against haz­ardous geo­log­i­cal process­es and harm­ful oper­a­tional impacts”.

Well video log­ging is a geo­phys­i­cal inves­ti­ga­tion method that allows visu­al­iza­tion of the inter­nal struc­ture of sub­sur­face geo­log­i­cal for­ma­tions. The method is based on the use of a video cam­era mount­ed on the end of a spe­cial tool (log­ging probe or rod) that is low­ered into the well. The cam­era records video images dur­ing low­er­ing or lift­ing, enabling detailed visu­al­iza­tion of for­ma­tion inte­ri­ors. The trans­mit­ted data is dis­played on mon­i­tors for spe­cial­ists. After com­ple­tion of record­ing, experts process the video mate­ri­als, care­ful­ly review them, and doc­u­ment all iden­ti­fied defects. The client receives a detailed report with expert com­ments and rec­om­men­da­tions and, if required, the record­ed video mate­ri­als.

One of the main advan­tages of video log­ging is the abil­i­ty to direct­ly visu­al­ly inspect geo­log­i­cal for­ma­tions. This pro­vides geol­o­gists with a sig­nif­i­cant amount of addi­tion­al infor­ma­tion on lay­er posi­tion­ing, struc­ture, tex­ture, and rock prop­er­ties. Video log­ging makes it pos­si­ble to iden­ti­fy frac­tures, poros­i­ty, sed­i­ment accu­mu­la­tion, inclu­sions, and oth­er geo­log­i­cal fea­tures that are impor­tant for reser­voir inter­pre­ta­tion.

Anoth­er advan­tage of video log­ging is its high res­o­lu­tion. Detailed images allow detec­tion of small-scale geo­log­i­cal fea­tures, pre­cise delin­eation of for­ma­tion bound­aries, and assess­ment of their poten­tial. In addi­tion, video log­ging enables iden­ti­fi­ca­tion of hid­den defects and prob­lems such as cracks, block­ages, or clog­ging of wells, which may affect oil and gas pro­duc­tion effi­cien­cy.

An impor­tant task of video log­ging is deter­min­ing the degree of sil­ta­tion with­in the well. The use of spe­cial­ized video log­ging equip­ment also allows accu­rate deter­mi­na­tion of the actu­al well depth and iden­ti­fi­ca­tion of the sta­t­ic ground­wa­ter lev­el. Video log­ging is rec­om­mend­ed to iden­ti­fy the caus­es of reduced pro­duc­tiv­i­ty of water wells.

• Prepa­ra­tion of doc­u­men­ta­tion (well pass­port com­pi­la­tion) for new­ly drilled wells or restora­tion of exist­ing ones.
• Detec­tion of unde­sir­able impu­ri­ties in the extract­ed flu­id, most often caused by cas­ing integri­ty fail­ure.
• Observed decrease in pro­duc­tiv­i­ty, typ­i­cal­ly result­ing from col­mata­tion (nat­ur­al cemen­ta­tion), clog­ging of the well­bore by for­eign objects, cas­ing depres­sur­iza­tion, or crack for­ma­tion.

Well video log­ging is a pow­er­ful tool for study­ing geo­log­i­cal for­ma­tions and their prop­er­ties. It pro­vides detailed infor­ma­tion on inter­nal struc­ture, geo­log­i­cal fea­tures, and poten­tial prob­lems. The appli­ca­tion of video log­ging is broad and cov­ers indus­tries such as oil and gas, hydro­ge­ol­o­gy, engi­neer­ing, and archae­ol­o­gy. Video log­ging is an essen­tial instru­ment for suc­cess­ful geo­log­i­cal inves­ti­ga­tions and prac­ti­cal appli­ca­tions. The Insti­tute of Geol­o­gy pro­vides video log­ging ser­vices for all types of wells up to a depth of 1,500 m. Our spe­cial­ist trav­els to the well site with spe­cial­ized equip­ment. Ser­vices are pro­vid­ed through­out Ukraine.