论文部分内容阅读
油气输导体系研究是油气成藏机理研究的重要内容之-。采取宏观与微观相结合的研究思路,综合应用录井、测井、地震、分析测试等资料,识别苏北盆地海安凹陷泰州组油气运移范围和路径,指出了油气运移的优势通道,分析了海安凹陷泰州组输导体系的特征及其组合方式。泰州组一段3套骨架砂体和系列断层相互配置,形成了连通砂体型、断层型、砂体一断层复合型3种输导体系类型。输导体系类型决定了该区的油气成藏模式,在泰州组一段1砂组,以连通性较差砂体为输导体系,发育岩性油气藏和构造-岩性油气藏;在2+3砂组中,以断层或砂体—断层为输导体系,发育构造油气藏。综合研究表明,海安凹陷泰州组的砂体和断层是油气运移优势通道,以连通砂体为主要运移通道的油气藏常形成于距烃源层较近或相邻的层位;而以断层为垂向运移通道的油气藏常在断层带附近多层叠置。
The research of oil and gas transport system is an important part of the research on hydrocarbon accumulation mechanism. Taking the combination of macroscopical and microscopic research ideas, this paper comprehensively uses logging, logging, seismic, analysis and test data to identify the hydrocarbon migration range and path of Taizhou Formation in Haian depression of Subei basin, and points out the dominant channel of hydrocarbon migration. The characteristics of the transmission system of Taizhou Formation and its combination in Hai’an Depression. The first set of 3 sets of skeleton sand bodies and series of faults in Taizhou Formation are mutually arranged, and three types of conductivity systems are formed, which are connected sand body type, fault type and sand body-fault composite type. The type of transport system determines the hydrocarbon accumulation pattern in this area. In the first sand block of Taizhou Formation, the sandstone with poor connectivity is used as the transport system to develop lithologic reservoirs and tectonic lithologic reservoirs. In the 2+ 3 sand group, the fault or sand body - fault-oriented transport system, the development of structural reservoirs. The comprehensive study shows that the sand bodies and faults in the Taizhou Formation in the Hai’an Sag are the dominant channels for hydrocarbon migration and the reservoirs with the connecting sand bodies as the main migration channel often form in the layers closer or adjacent to the hydrocarbon source. Reservoirs with vertical migration channels are often stacked in layers near the fault zone.