Logging Evaluation Method Of Extreme Heavy Oil Reservoir In Sha Iii Members Of Sanhecun Sub-Sag

Sanhecun sub-sag is located in the south of Bonan sub-sag,north of chenjiazhuang bulge,west of Gunan sub-sag with superior accumulation conditions.In 2013 with new forecasting reserves of 34.4761 million tons,Sanhecun sub-sag is one of 12 blocks which was exlored and evaluated in 2014,which is new front of increasing reserves and production.Before January 1,2013,the area,however,had no commercial oil wells and well testing results present the phenomenon of oil zones producing water or nothing,that urgently need us to review old well,carefully evaluatenew wells,improve the interpretation precisionand provide accurate interpretation results and geological parametersfor exploration research and proven reserves report.Based on wide collection of all kinds of logging data and geological data,the heavy oil layer logging evaluation methodresearching is carried outin a targeted fashion.Because conglomerate and sandstone grow in Sha III member reservoir of this area,distribution of lithology is extremely complicated,doule kinds of pore grow and produced oil is heavy with phenomenons of oil-water bottom-up and juxtaposing,which also appear even at the same zonebecause of varation of lithology and petrophysical property.Especially in the super heavy oil zones of conglomerate with ultra low permeability,crude mode of occurrence and the effectiveness of the reservoir evaluation is a new subject,Traditional well logging evaluating methods can not meet the need of exploration in this block.Based on well logging information,combining with other non well logging data,starting from researching of four charaters relationship of reservoirs,quantitative lithology division method by well logging data is proposed in this paper,based on which fracturingporosity calculating method in conglomerate is researched and reservoir effectiveness evaluating and fluids recognizing models are formed pointing to different lithology.The calculation method of petrophisical parameters such as fracturing porosityof conglomerate is researched.Especially the occurrence in ultra heavy crude oilzone of conglomeratewith ultra low permeability is studied and effectiveness evaluation methodof ultra heavy crude oil zonewith ultra low permeabilityis formed.In the actual application and producing process,researching resultsin this paper improve coincidence rate of well logging data interpretation and providefine logging evaluation results and all kinds of petrophisical parametersfor the discovery of SanGe Village oilfieldwhich is the 81 th oilfieldof Shengli Oilfield.