| Fuyu oil field is on the Fuyu NO. Ⅲ structure which is located on the eastern edge ofsouthern Songliao Basin Fuxin structure. The main target horizons of oil explorationare the forth section of Quantou Formation, Fuyu oil layer; and the third section ofQuantou Formation, Yangdachengzi oil layer. Lithology is mainly siltstone and finesandstone. In the work area, the number of normal faults is very large, the trend offaults is mainly EW. Fracture distribution and oil-water distribution is very complex,and also the reservoir is buried shallow, the oil layer is thin, and the physical propertyof the reservoir is quite different. With oil field’s development, Fuyu oil layer hasentered the high water exploition stage. The type of reservoir in work area is mainlystructural lithologic reservoir.Basing on finishing stratigraphic division, we use logging slowness curve andRick wavelet to make Synthetic seismogram carefully. By using Syntheticseismogram, we build up the relationship between drilling stratification and thecharacteristics of seismic reflection wave group. After that we finish horizon trackingin three-dimensional seismic data. In the next step we name the faults on section andassemble them according to their names. And then we use the matched relationshipbetween faults and wells to analyze the wells, which are located on the different sidesof one fault, and also which used to compare with the normal nearby wells are overthe faults. Then, using the result of the horizon tracking based on seismic data onHorizon T2-1and Horizon T2-2, we identify the different types of micro-structure, andalso do the statistics about them. Afterwards we select3different types of structurecombined modes with different top and bottom, and contrast combined modes andspecific well data, to analyze how the modes impact the remaining oil. Finally weanalyze the influence of remaining oil, which is coming from Micro-structure, bycombining the specific wells and the Zhong65block sedimentary facies analysisresults.Under this research mentality, we acquire following several results:1. The section geometric shape of faults include non rotating plane normal fault, listric normal faults and ramp flat normal faults, and the section combination formsinclude sidestep shape, feathery, cabbage shape and y-shaped fault combinations.Faults in work area can be mainly divided into two kinds, east-west and north-south,and the north-south ones are more than70%; the fault throw of Yangdachengzireservoir’s top surface is focused on less than20m, and inclination angles are evenlydistributed between0°-30°.2. The analysis result of comparison between wells on different sides of faultsshows that vertical fault throw mostly concentrate around20m, and faults are mainlymanifested in top layer of the Fuyu oil reservoir. Also analysis result of comparisonbetween wells over faults and normal wells shows that, because of the faults, we pickup, are located on the wing of anticline, faults are generally faulted less than10m.3. Totally149forward structures,39neutral structures and72negative structuresare identified, and we analyze the inheritance of the different cell blocks of twohorizons detailedly. The double convex structural style is the most favorable fordistribution of remaining oil, top convex flat bottom structural style’s influence isworse than double convex; double concave structural style’s influence is the worstamong this three combination.4. For distribution of oil and water, the forward structures, neutral structures andnegative structures’ positive influence about enrichment of remaining oil is gettingweaker. For the purposes of analyzing the positive influence of enrichment ofremaining oil between sedimentary facies and structural styles, the decision of thesedimentary facies effect is more obvious. |
PDF Full Text Request