Exploratory Drilling in Deep-Water Areas of the Caspian Sea

Orudjev, S. A. (Petroleum Ministry of the U.S.S.R.) | Timofeev, N. S. (All-Union Drilling Research Institute, U. S. S. R.)

OnePetro 

EXPLORATORY DRILLING IN DEEP-WATER AREAS OF THE CASPIAN SEA Abstract Résumé The report starts with a history of geological pros- Au début du rapport on met un article où on note pecting in the Caspian Sea and an account of today's l'histoire des recherches géologiques effectuées sur la technique in geological exploration. mer Caspienne et l'état actuel de la technique géo- Geological perspectives of discovery of new oil and logique d'exploration. Par sa structure géologique, la gas deposits in the Caspian Sea are highly promising. mer Caspienne est très perspective pour les nouvelles Oil prospective areas adjacent only to a 60m isobath découvertes des gisements åu pétrole et du gas. En are about 6 times the Apsheron Peninsula area, which examinant l'isobahte de 60 m, on peux remarquer que has already yielded 750.000,000 m3 of crude oil. la section des terrains perspectifs pour la découverte The report deals with engineering and organisational des gisements de pétrole et de gas prévoit de 6 fois la aspects of wide-scale deep exploration drilling prac- section CAPSHERON, qui a donné déjà 750.000,000 tice over the whole of the Caspian Sea. m3 de brut. Le but de ce rapport consiste à analyser In particular, the report deals with platforms for sea l'organisation et la technique de forage d`exploitation waters from 60 to 100 m deep, and methods of their sur une grande échelle sur tout le territoire de la mer erection by means of powerful catamaran-type crane Caspienne. On attire l'attention sur la construction des ships. plateformes pour 60-100 m de profondeur et sur les Besides, the report brings forward different types of méthodes de les mettre en service, à l'aide du navire structures for exploration drilling in the Northern part "catamarane" équipé d'un bras de. chargement. On of the Sea, subject to freezing, as well as some basic donne les solutions techniques des installations pour le principles of calculation of drilling platforms for forage d'exploration au Nord de la mer Caspienne, strength and stability. couverte parfois de glace. On donne le principe à calculer de la stabilité et de la résistance mécanique des plateformes. Geological features of the Caspian Sea basin struc- coveries and subsequent development of the series of ture are very similar to those of the adjacent oil and rich oil and gas deposits including Giurgiani-offshore, gas fields of Caucasus and Transcaspian regions which Isberg-offshore, Neftianie Kamni, Darvin Bank, indicates to high perspectivity of structures hidden Zhiloi-offshore, Pestchani-offshore, Karadag-offshore, under the Caspian Sea waters. Griazevaya Sopka, Ziria-offshore, Cheleken-offshore, I t may be declared without any hesitation that all the Duvanni, Sangachali, etc. underwater area of the Caspian Sea is oil and gas per- Many perspective offshore areas were prepared for spective. With all that, the area of the relatively deep exploratory drilling as a resu