Research On The Four-property Relationship Of Reservior And Fine Identification Of Oil In Member 3 Of Funing Formation In Sha-Hua-Wa Area

It is difficult to identify oil layer and water layer in Sha-Hua-Wa area,due to the reservoir heterogeneity,complex oil and water relationship,the electricity regional differences in oil-bearing reservoir,the existence of low permeability sandstone reservoirs with low resistivity oil layer,and the influence of igneous rock.Because of this,the present identification plates can not meet actual production exploration and this will bring some problems for oil reservoir evaluation later and efficient production.Based on real core observation and the results of core experimental analysis,this thesis according to macro and micro reservoir analysis of member 3 of Funing formation in Sha-Hua-Wa area,studies the internal rules with research ideas form local to the overall character among reservoir lithology,physical property,oil bearing character and electrical properties,and systematically summarizes the affection factor of logging evaluation and electrical properties characteristics of oil,water and dry layers in respective district,member and lithology of member 3 of Funing formation in Sha-Hua-Wa area.Also it analyzes that the facies,diagenesis and the four-property relationship of reservior have influence on the oil bearing character and electrical properties.As the result of the four-property relationship analysis,a number of detailed interpretation plates of oil,water and dry layer are established.The interpretation accuracy of the plates is over 90%.At the same time,the electrical property standard of fracture operation reservoir is established,and the commercial oil-production electric standard is developed according to the current development benefit of Jiangsu oilfield.Furthermore,it discusses the suitability assessment for the low resistivity oil-layer saturation which is calculated by the W-S interpretation model and innovatively establishes variable parameters Archie formula on the basis of reservoir lithology.This reserch results improve the interpretation success rate of the exploration and development wells in Shahuawa area.It is proved by oil production that the coincidence rate reached more than 95%,and numerous economic benefits have been obtained.