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Located in Dongying Bamianhe depression south slope of the eastern section of the district with one of the oil and gas accumulation in Dongying Depression Shahejie Formation in the main oil-bearing strata. With the continuous improvement of the level of oil and gas exploration in recent years, the region gradually into the subtle reservoirs in the exploration and development stage, Shahejie, especially Shahejie become the focus of the study of subtle reservoirs horizon. This thesis is to establish the study area Shahejie sequence stratigraphic framework as the main target, taking into account the focus horizon stratigraphic architecture, depositional systems, and other aspects of the study, the research results of the thesis is to provide guidance for the development of the Next oil and gas exploration. Paper on the basis of full understanding of the regional overview of the study area, based on paleontological features, lithological characteristics, logging features, Shahejie Formation, the study area has been divided, that the study area Shahejie Formation layers fully developed, the development of a sand four sections, segment lower Es3, sand SHASAN, the sand three on subsegmental, the Shahejie and sand for some, which lower Es3 paragraph at the edge of the basin is thinner, the bottom of the to see sandy mudstone, lime mudstone lithology, as well as other characteristics of variegated mudstone. Of Shahejie the Shahejie to the edge of the basin thinned to lack of basic development of other layers in the study area, and thicker toward Sag. Predecessors have been unable to determine whether the study area and development of the lower Es3 segment, through a detailed study of the problem of this thesis gives a definite answer. Stratigraphic characteristics knew based on the paper using a variety of information, through a variety of methods of seismic methods, logging methods, the rock electrical characteristics method, and paleontological methods combined internal Shahejie group in the study area identified seven three level sequence interface Shahejie Formation is divided into six third-order sequences. Which sequence is divided into two transgressive and Lake regressive systems domain, one-third of the other sequences divided LST, the lake transgressive systems tract and highstand systems tracts. Vertically integrated Shahejie group as a whole according to the longitudinal direction of the lithology changes and superimposed relationship can be broken down into 32 parasequence sets. By detailed core observation, on the basis of the comprehensive study of the rock types and combinations thereof, sedimentary structures, phase sequence, paleontology, developmental characteristics, study area, sand four major development alluvial plain deposits, deltaic sediments, littoral and shallow lake dam deposition, as well as the type of carbonate beach sediment deposition. Alluvial plain deposition is mainly developed in the early Shahejie; beach and bar deposition mainly developed during the transgressive, the relatively large size of the southeastern beach bar, gravel beaches banded located in the lake basin edge; the carbonatite Beach mostly on the beach and bar around the delta front, developed mainly in the northwest and southwest of the study area; deltaic sediments and development, mainly in the southern and north-east of the study area, the northeast delta Shahejie deposition period has been advancing to the lake, south of Delta in the sand early early and maximum flooding period began flooding the larger, the smaller of the other time periods. The deposition is basically the same type of tectonic blocks north slope near the lake basin, and more developmental carbonate sedimentary rocks Beach and shore-shallow lacustrine deposition.
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