Logging Evaluation Of Volcanic Rock For Well Block Jin Long 10

With the development of petroleum exploration,volcanic reservoirs have become a new growth point for oil and gas,especially the carboniferous volcanic reservoirs in the Zhongguai sag have become an important target for oil and gas exploration.The volcanic reservoir has the characteristics of complex lithology,diverse pore structure and strong heterogeneity.Therefore,in order to accurately identify the lithology,it is necessary to evaluate the reservoir type and reservoir properties,and to determine the volcanic reservoir structure and process log interpretation parameters.In this paper,the reservoirs of the Jin Long10 well in the carboniferous volcanic rocks of the Zhongguai sag was studied.The lithology of the volcanic rocks was analyzed by studying the geological background,evolution characteristics and core data of the area,and the volcanic log response characteristics of different lithologies were summarized.The favorable logging curve was identified;the logging data was standardized,the volcanic lithology was divided by the intersection map,and the pore structure and fracture structure of the volcanic rock were determined by the image logging map,which was the logging of the carboniferous volcanic reservoir in the Jin Long10 well area.Explain the basis for the explanation.Using the combination of theoretical model and statistical data,the two main lithologies in the work area,andesite and volcanic breccia were studied,and the corresponding rock skeleton plates were established to obtain effective matrix porosity and fracture porosity.According to the complex pore structure of volcanic rocks,the oil saturation was calculated by the archie formula with m value or n value,and the reservoir saturation model of andesite and volcanic breccia was established by lithology to explore different theoretical models.The parameters of the volcanic reservoir were evaluated.Finally,the "J" function direct fitting method and the oil layer production method were used to obtain the effective thickness and the lower limit of the oil layer.Finally,the oil layer was identified and comprehensively evaluated by the reservoir lithology.