| After30years of exploration and development in Huanxiling oil field of the Liaohedepression, the oil and gas resources that can be developed are less and less. To find substituteresources,it is necessary to make clear the sedimentary characteristics of reservoir under thebackground of the gravity flow and to look for more low resistivity reservoir.Through the analysis of core,logging,oil testing and physical property,microscopicobservation and the reasearch of reservoir characteristics,the mechanism for existing largelow resistivity reservoir that in Rehe oil reservoir and Dalinghe oil reservoir of ShahejieFormation in the Southern Huan xiling oilfield,is first proposed in this paper.And it isThe invasion of saltwater drilling mud,low amplitude structure and the high shale content inthe reservoir.It commonly used the oil-water relation chart to identify the reservoir fluid athome and abroad.A new way is made to dentify oil and gas layers quantitatively in thispaper,which is the application of multigroup step discriminant analysis model combinatingwith oil-water relation chart.And it increased the rate of oil water layer identification morethan94%. After identifing the oil,water and gas layers of152wells again,13oil layers and7gas layers is added.The horizontal distribution law of oil and gas was reasearched with the dynamic dataduring the exploratory and development of resource,the reservoir characteristics and thediscovery oil-gas layers.It shows that,the types of reservoir are mainly tructural reservoir andstructural-lithologic reservoir.The oil and gas distribution in the plane are mainly controlledby fault, structural highs, oil-water boundary and lithologic character.At last,threeadvantageous traps have been found after accounting geological reserves of each block andmultidisciplinary analyzing the trap elements,which is a solid foudation for the next oil andgas exploration.. |
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