The Study On Comprehensive Geological Characteristics Of Mariann-mariann4A Oilfield,Andes Project

Andes Project is one of conventional oil development projects of CNPC in South America.Mariann-Mariann4 A oilfield is located in the northeast of Oriente Foreland Basin in Ecuador,and it is a low amplitude structural sandstone reservoir with edge and bottom water.UT M-M4 A oilfield reservoir for containing glauconite sandstone reservoir discovered in 2012.In this paper,based on the high resolution three geological data,reconstruct the stratigraphic framework of M-M4 A oilfield,combining well logging,mud logging and core data,completed the fine stratigraphic classification,the NAPO group T sandstone sandstone section is divided into three groups of six layers.On the basis of stratigraphic framework well combined,completed in the 3 d seismic interpretation,the main oil-bearing series in building characteristics,the fracture system,the control factors in the research.In combination with the sedimentary background of the region,the use of coring well data to carry out the analysis of single well facies analysis,combining previous research results,determine the research,UT layer for Marine tidal flat sedimentary main development tidal channel,sand flat,mixed flat and mud flat microfacies,MT wave control deltadeposition is the main development of underwater distributary channel,sand bar and distributary channel microfacies.Integrated application of reservoir inversion technique describe UT each small layer of sand body distribution.On the basis of rock slice data,combined with core observation,analysis of the UT the genesis of glauconite sandstone reservoir and diagenesis,analyzing glauconite content on the reservoir property.Integrated application of logging data in the reservoir physical properties,interlayer insulation characteristics and reservoir heterogeneity study.Secondary application logging interpretation data reservoir characteristic research on MM4 A oilfield was carried out,including the feature,reservoir plane and longitudinal relationship between oil and water distribution,temperature and pressure system,complete the double calculation of reserves.Finally,based on the geological comprehensive study,fine geological model was established for mathematical model provides a geological basis.