Sequence stratigraphy is a technique used in dividing, analyzing and mapping sedimentary rocks. It is a process that involves the interpretation of sedimentary packages and entails an understanding of depositional processes and the factors that directly influence them such as sea level changes, subsidence rates sediment supply, climatic conditions and basin geometry, thus allowing one to describe and predict their occurrence, extent, geometry and economic importance to sedimentary facies. The sequence stratigraphy and facies analysis of an “X” field located in the Niger Delta Basin was carried out to enable the description of the depositional environments, which could be of great importance while generating a regional facies model, which in turn enables one to study properly the general summary of a specific sedimentary environment to guide exploration and field development objectives. The aim of the study entailed using well log data in establishing the sedimentary facies, their successions and environments of deposition as well as to determine the sequence stratigraphy of the prospect “X” field. The method of analysis involved identification and correlation of facies by log signatures. A total of four log facies were recognized in the study area; funnel-shaped facies representing a deposition of cleaning upward sediment or an increase in the sand content of the turbidite bodies; a cylindrical-shaped facies representing slope channel-fills and turbidite fans; a bell-shaped facies which is indicative of a transgressive marine shelf and the serrated/irregular shaped facies which has no character, representing aggradation of shales or silts. Each of the types of facies identified had its own sediment supply and characteristic which provided a stratigraphical framework for environment of deposition description and interpretation. The results from the four wells (Well 010, Well 005, Well 007, Well 011), showed that the two main identified lithologies across the Niger Delta Basin “X” field were sandstones and shale. The sequence stratigraphic analysis revealed also a lithology of alternating sandstones and shale. Sequence boundaries and maximum flooding surfaces were equally identified in the field. The results achieved would enhance the exploration and field development planning objectives in the prospect “X” field.