The Analysis Of Characteristics Of The Sedimentary About The Lower Submember Es2(0) Of Wendong Oil Field

In this paper, to Wendong oil field, I have applied sequence stratigraphy, sedimentology, oil geology ,such as the theory and methods, through the observation of core drilling and interpretation of logging data and identification of core slice such as analysis of the means,and had a more in-depth studies on sedimentary facies and the distribution of sand body .First of all, on the study of sequence stratigraphy,with the strata contact relations, characteristics of the cycle of phases,phase surface, maximum lake flooding plane of the regional characteristic interface,overlain style of river sandbody and the good regional symbol , I have identified sequence boundary. Wendong oil field have been divided into a super-structure sequence and eight third-order sedimentary sequences. With the principle of comparison and contrast of sandbody ,combined with the focus of a single well, wendong oil field divided into a number of small layers.Secondly, on the study of sedimentary systems, through a new awareness of signs and research I have drawn on previous research, combined with oilfield sedimentary environment, identified Wendong oil fied as mainly diffuse Lake, Delta depositional system components and divided into various sub-phase and microfacies types.Thirdly, on the study of sediment source, Deposition period of the existence of a number of source area, namely, is the eastern source area, the western source area, the northern source area and the southern source. The oil field have been multi-source, multi-center characteristic of sediment,in which Neihuang-Luxi uplift from the East and the West were the source of supply of the two areas. Early Paleozoic rock are mainly carbonate , dolomite, Carboniferous - Permian coal-bearing clastic rock and a small amount of Archean crystalline metamorphic rocks and Mesozoic-Cenozoic granite acid. Sedimentary of closely related source and flood events had been well developed.Fourthly, on the study of Sand body study, the distribution of sand bodies is controlled by the distribution of sedimentary facies, the direction is north-south banded distribution, syn-sedimentary fault charges water catchment system and source position as transmission channel of sand body.In short, the study of sand body deposition and distribution will provide a basis for in the progressive exploration and development on lithologic oil reservoir.