Studies On Reservoir Characteristics On Chang6in Huanjiang Area

Ordos Basin is the second-largest sedimentary basin on land in China which possessesabundant oil&gas resource and has bright prospect in oil&gas exploration.HanJiang region issituated at the middlenorth of North Shaanxi. It is in Slope,suijing oil field. Chang6of theTriassic period formation is the main oil bearing series.On the basis of previous researches,we take fine strata classification and correlationtheory as instruction divided and compared to strata in entire area and make a deep division tochang6formation and get five oil bearing series.The article is theoretically based on reservoirgeology,reservoir sedimentology,reservoir well logging geology,exploration geology etc.Comprehensively analyses all kinds of the sedimentary facies marker.Used core,well loggingand abundant of static state and dynamic data to determine.Chang6formation is themeandering river delta deposition system.That’s main developed distributary channel anddistributary bay. Using research results such as source direction and sedimentary facies,thecharacteristics of the sandbodies distribution and sedimentary microfacies have beendiscussed.Using porosity and permeability data,the controlling factors have been analyzed.Onthe basis of the systematic description and evaluation of various properties,the forming rulesof reservoir are concluded and the data range of profitability are anticipated combined withwell test data by HuanJiang region.