综合运用钻井岩心、野外剖面、镜下薄片和常规测井曲线等资料对四川盆地东部长兴组礁滩相储层测井地质特征进行了分析研究.结果表明:长兴组测井相主要包括箱型、复合型、钟型、漏斗型和尖指型,箱型和复合型代表了台地边缘生物礁相带中的礁核微相,是长兴组最有利储层发育的测井相类型；钟型和漏斗型代表了台地边缘浅滩相带中的生屑滩微相；而尖指型则代表了最不利储层发育的滩间微相.研究区孔洞缝型储层最好,储集空间以原生孔洞为主；针孔型和裂缝型-针孔型其次,储集空间类型以晶间孔为主,在研究区最发育；而裂缝型最差,储集空间以不同成因的裂缝为主.通过测井模型的解释,峰18井长兴组储层自上而下逐渐变好,顶部为裂缝型储层,上部为针孔型储层,下部为孔洞缝型,与岩心观察、薄片鉴定和录井资料分析相符,确定了该模型的可靠性,为研究区未取心井储层类型的识别提供了依据.%According to the combination of core description, field profile, thin section and well logging curve, the geological characteristics of reef and shoal facies reservoirs of Changxing Formation in eastern Sichuan basin are studied. The results show that the main logging facies could be divided into the trunk type, compound type, bell type, funnel type and finger type. The first two types represent reef core microfacies and are the most favorable reservoirs in Changxing Formation. The bell and runnel types of logging facies represent bioclast shoals in the platform edge shallow facies. And the finger type represents intershoal microfacies which is the least favorable reservoir. The pore-cave-crack type of reservoir is the best, whose reserving space is dominated by pore and cave. The pinhole-crack type is the next, their reserving space is dominated by intererystal pore and it is the most developed in the studying area. The crack type is the worst, whose reserving space is dominated by crack of different genesis. According to the interpretation of logging models, the reservoirs in Feng 18 well become better from top to bottom. The top reservoir is pinhole type and the bottom is pore-cave-crack type. They are consistent with the core observations, thin section identifications and logging analysis. So the model is reliable and instructional for further oil exploration in the eastern Sichuan basin.
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