Cause analysis of differences in oil and gas enrichment levels within fault block based on migration and accumulation process:A case of Minghuazhen Formation in Nanpu M Fault-block
To determine the reasons for the differences in oil and gas enrichment levels in the Minghuazhen Formation of the Nanpu M Fault-block,the process of oil and gas accumulation is subdivided into three different stages of migration and accumulation:oil and gas entering the trap,migration in the trap,and accumulation in the trap.Based on the analysis of the dynamic and resistance differences of oil and gas migration and accumulation at each stage,and combined with the oil and gas enrichment layers in the fault block,the reasons for the differences in the oil and gas enrichment degrees of different small layers in the Minghuazhen Formation of the Nanpu M Fault-block are clarified.The results show that the differences in oil and gas entering the trap and accumulation conditions is the main reasons for the difference in the oil and gas enrichment layers of the Minghuazhen Formation in the Nanpu M Fault-block.The main reasons for the difference in the conditions of oil and gas entering the trap and gathering in the trap are the fault-reservoir drainage and displacement pressure difference between the transport faults and the blocking faults in each small layer.The fault-reservoir drainage and displacement pressure difference is affected by fault distance and reservoir thickness and is related to the lithologic combination of adjacent strata.The research and understanding are significance for the fine-rolling development of fault block reservoirs.
fault blockoil and gas enrichmentmigration and accumulation processcause analysisfault-reservoir drainage pressure difference
NETL
NSTL
万方数据
