Resrarch On Favrable Area Prediction And Hydrocarbon Enrichment Patterns Of The Yan9Resevoir In Pengyang Area, Erdos Basin

PY Region is located in Feng Zhuang-Meng Yuan,PY, Ningxia Hui Autonomous. Thewell field is located in Loess Plateau,a place where terrain is very complex,full of valleys, theelevation of undulating surface is large and the surface is Quaternary unconsolidated looseyellow sand. Pengyang region is above the Tianhuan syncline east and west wingbackground,as the fold or nose uplift casued by tectonic movement matched the NE-SWorganic reservoir sand, the structural control effect is obvious.In this paper, sequence stratigraphy, sedimentary petrology, geology and other relateddisciplines logging theory are as a guide. The well logging, core analysis and other static dataare used for coenocorrelation and dividing small layers and the Yan9oil layer is divided intoYan91and Yan92+3,two small layers. The microfacies of Yan9is particularly researched bymaking full use of the color area identification, granularity flag, sedimentary structures, aswell as regional geological logging data and other information. Studies have shown that Yan9in this area belongs to the delta plain depositional environment. On this basis, combinedprovenance analysis, The law of development and distribution of sedimentary facies in thisarea is researched, while combined with analysis data and routine physical property data,reservoir characteristics of the area is researched too.The logging interpretation model is builtthrough the research of the "four" establish relationship of the reservoir, the lower limit ofreservoir parameters is determined, and then the secondary logging data interpretation iscarried out, on the basis of which the properties of the reservoir sand and the distribution ruleare analysed.Combined with sedimentary facies,sand body distribution, reservoir properties, loginterpretation and testing and production testing and other data, oil and gas accumulation inthe area are analysed: the reservoir of Yan9in PY, Ordos Basin,is mainly controlled by aplurality of elements, wide covered source rocks is the premise of Jurassic reservoirs,hydrocarbon accumulation spaces are controlled by sedimentary facies,the enrichment ofreservoir is controlled by structures, where sedimentary facies and structure has commoncontrol characteristics of oil and gas.