Conceptual model sedimentological Botuoba productive horizons OF Srednebotuobinskoye oil and gas condensate deposit

Abstract

The object of study in this work is the Botuobin productive horizon of the srednebotuobinskoye oil and gas condensate field located in the Central part of the Mirninsky ledge of the Nepsko-Botuobinskoye antekliza. In recent years, during active drilling at the field productive horizon is characterized by a new core material of high quality, which allowed to conduct a detailed sedimento-logical study. As a result of this work, new information was obtained on the conditions of sedimentation. The object under study is a sandy complex of Delta Genesis. Its formation took place at the stage of high sea level as a result of the Delta's fencing into a relatively deep sea basin. The demolition of the material took place from North-West to South-East. The removal of material into the pool was carried out by two fluvial systems forming separate deltas. It is revealed that depending on the prevailing currents there was a transformation of the Delta cones of removal. Sandstones of coastal shafts, the upper front of the Delta and distribution channels have the best filtration and capacitive properties. The main controlling factor affecting the filtration and reservoir properties of reservoir rocks is the percentage and type of cement. For the first time in this work the detailed characteristic of the main facies zones is given, the mineralogical and filtration-capacitive characteristic of reservoir rocks is given, and also the conceptual facies scheme is presented.