GENETIC TYPES FOR PETROLIFEROUS SYSTEM OF ORGANIC REEFS IN THE PERMIAN SYSTEM OF SOUTH CHINA
GENETIC TYPES FOR PETROLIFEROUS SYSTEM OF ORGANIC REEFS IN THE PERMIAN SYSTEM OF SOUTH CHINA
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作者：
Yang Xiao
根据相对海平面变化速率与生物礁生长速率之间的关系，生物礁在成因上可分为沉积型、加积型和断离型南盘江地区可识别茅口期（自西向东）沉积，长兴期为加积礁沉积在鄂西地区可识别长兴期（自西北向东南延伸），和离岸礁（自东南向西北）不同类型的生物礁具有不同的含油气系统机制和单元配置，受相对海平面变化的控制，因此，在成因上可划分出加积型和叠置型生物礁含油气系统，在南盘江地区可发现叠置型生物礁含油气系统（茅口时代）与鄂西川东地区可发现断离生物礁，南盘江地区可发现加积生物礁含油气系统生物礁含油气系统成因类型的概念在生物礁储层的钻前评价中发挥了重要作用。
The organic reefs could be genetically classified into progradational,aggradational and offlapping types,according to the relation between the relative sea level change rate and the growth rate of reefs.Progradational reef (prograding from west to east) of Maokou age could be recognized in Nanpanjiang area,while Changxing age took aggradational reef.Progradational reef (prograding from northwest to southeast) of Changxing age could be recognized in western Hubei,and offlapping reef (offlapping from southeast to northwest)of Changxing age could be recognized in eastern Sichuan Province of China.Different kinds of reefs have their own mechanism and element configuration of reef petroliferous system,which are controlled by relative sea level change.Consequentially,progradational,aggradational and offlapping reef petroliferous systems could be genetically determined.Progradational reef petroliferous system could be found in Nanpanjiang area (Maokou age) and west Hubei (Changxing age) Province.Offlapping reef could be found in the eastern Sichuan Province.Aggradational reef petroliferous system could be found in Nanpanjiang area (Changxing age).The idea of genetic types of reef petroliferous system have played an important role in pre_drilling appraisal of hydrocarbon potential for reef reservoir.