济阳坳陷页岩油甜点评价方法研究

根据地质、地化、测井资料,明确了页岩油富集主控因素是泥页岩岩相、页岩油的可动性、泥页岩裂缝和异常压力等要素。根据页岩油富集主控因素建立了页岩油甜点评价方法。不同岩相它的储集性和含油性不同,因此岩相可由它的储集性和含油性来表征。用AC曲线和R4曲线评价页岩岩相的储集性和含油性。页岩油的可动性可由S_1、S_1/TOC和页岩油黏度综合评价;S_12 mg/g,S_1/TOC10%,黏度10 m Pa·s的页岩油可动性好;泥页岩裂缝可由岩心、常规测井和成像测井综合判识;压力系数大于1.2的区域是页岩油发育的有利区。最后,根据页岩油主控因素综合确定了济阳坳陷页岩油甜点分布的有利地区,为济阳坳陷下一步页岩油勘探指明了方向。

Evaluation Method of Shale Oil Sweetspots in Jiyang Depression

Based on geology, geochemistry,log data, the main controlling factors of shale oil enrichment in Jiyang depression are determined.,which include shale lithofacies,mobility of shale oil,shale facture and abnormal pressure.Shale oil sweetspots evaluation method is established based on shale oil main controlling factors.Different lithofacies have different reservoir property and oil -bearing potential. Therefore shale reservoir property and oil-bearing potential may represent whether lithofacies are good or not,which is evaluated by AC curves and R4 curves; Mobility of shale oil can be evaluated by S1, S1/TOC,and shale oil viscosity; It is good for shale oil mobility when S1>2mg/g,S1/TOC>10%,viscosity<10mPa.s;Fracture development scopes are judged by core,conventional log,and FMI data.It is advantageous areas when pressure coefficent is more than 1.2.Advantageous areas of shale oil sweetspots are determined according to the main controlling factors, which point out direction for next shale oil exploration in Jiyang depression.