| In this paper, with high-resolution sequence stratigraphy and sedimentology of keytechnologies used as guidance, the advantage of large, rich, detailed logging taken, corematerials, surface flooding made to combine to compare signs under the “regional frameworkbased on a closed cross-section of a standard layer control series, depositional model-syngenetic fault mode guidance, step by step comprehensive comparison of priorityapproximation, and the progressive closure pushed progressively partition “of fluvialreservoir comparison method, conducted with Putaohua resolution sequence stratigraphy,depositional systems of large dense well-microfacies, reservoir distribution; and the firstapplication of this method dealing with elm forest area of more than1,600wells in theregion’s nine sedimentary units wholely, uniformly, finely contrast, the elm uniform andfine deposition time unit level stratigraphic framework forest areas were established; the“slope'depression Putaohua resolution sequence stratigraphic models were namelyproposed: the elm forest areas Putaohua is a from northeast to southwest.stratigraphicthickness gradually thinning mode.“Under the fine control of the isochronous stratigraphic framework through aspects ofsandstone thickness Putaohua Yushulin region, the ancient topography, combined plane, andparticularly a large area of dense well sedimentary microfacies and distributionmonosandbody raw materials, etc. comprehensive study of sedimentary system was clearlyrevealed: Yushulin region, the Putaohua provenance is from Northen Resource, and XinanNan River branch. The deposition system type is the typical large shallow river deltacontrolling system. Its skeleton distributary channel sand body is a continuous sand body one,with overall the NE-SW trending, constitute the main reservoir of sand Putaohua distribution.Its genesis is characterized by single sand body distributary channel characteristics, withstrong regularity and banded consecutive overall SW direction, the width of a more stable,well along with other types of flat sand mix. The characteristic of sand was good on Northwhile poor on Southern.With the previous full reseach of absorption of hydrocarbon source rocks, oil and gassources, secondary migration of oil and gas research results into critical periods of possession,from the eastern slopes of Sanzhao depression in this large reservoir system, by depositingsystem, palaeostructure evolution, horizontal distribution of hydrocarbon source rocks,hydrocarbon phase, hydrocarbon migration, aggregation, studied law and other oil reservoirin the area of oil and gas, the “two-way migration and accumulation mode” was proposed.The loop pits oil and gas in main migration line and in both sides of favorable oil and gasaccumulation zone, the elm forest areas of Putaohua are focused on the oil and gasaccumulations.Through the above research results, according to the study area and stratigraphic featuresunique, making use of source control systems theory and its comprehensive oil analysistechniques,“Analytical Hierarchy “by accumulation, gradually forming model analysis of regional and tertiary structure of accumulation mode and local structural reservoir model, themain factors of controlling possession are revealed, based on-a comprehensive study of“local tertiary structure” accumulation mode control function and structure, reservoir, water,etc., to predict26exploration of wells deployment favorable ratings block; and according tothe characteristics and controlling factors of reservoir lithology,the side extention and emptyfillment of the eight development blocks have been made. |
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