Research On Oil Reservior Characteristics Of Chang6Oil Layer Formation In The North Of Ansai Oilfield Huaziping Area In Odros Basin

This paper in the north of AnSai Oilfield HuaZiping Area of Chang6Oil Layer Formationas the research object. The sedimentary structure and reservoir characteristics in Chang6oillayer formation are studied based on the Well logging, mud logging, the analysis of cores andSEM (scanning electron microscopy),cast thin sections, X-ray diffraction of clay, highpressure injection. The results show that the chang6reservoirs are mainly made of feldsparsandstones and the second are lithic feldspar sandstones. Type of porosity is mainly residualintergranular pore,the formation of clastic particles dissolution of feldspar dissolution pore,and the formation of interstitial material dissolution laumontite solution pore. The reservoir isfine throat,but the distribution is relatively concentrated.What’s more, the reservoir are poorphysical property. The reservoirs belong to the low porosity and low permeability ones, beingof the average porosity is10.45%,and the average permeability is1.2×103um2. At the sametime, the reservoirs has poor correlation with porosity and permeability, and the permeabilityand Carbonate content has poor correlation too. The change of porosity and permeability underthe comprehensive effect of multiple geological factors,on the other hand,it’s not affected bythe same factors,and which has not exactly the same trajectory.