摘要
姬塬地区长7烃源岩的总有机碳含量、总烃含量、热解烃产量等指标达到好烃源岩标准,具有较强的生烃能力。影响姬塬地区成藏的主控因素有4个,即烃源岩、沉积作用、成岩作用和剩余压力,优质烃源岩为油气藏的形成提供物质基础,水下分流河道砂体和溶蚀孔隙为油气储集提供空间,剩余压力为油气运移提供主要动力。成藏主控因素对不同层系油藏的控制作用是不同的。从长2油层组到长9油层组,沉积和成岩的控制作用逐渐增强,构造的控制作用逐渐减弱。研究区主要存在2种成藏模式:成岩-沉积-近源成藏模式主要分布在长4+5、长6、长8、长9油层组;构造-沉积-远源成藏模式主要分布在长2油层组。
The indicators of Yanchang-7 formation in Jiyuan region,such as total organic carbon,total hydrocarbon content and pyrolysis hydrocarbons yield reach the criteria of good source rock,with a strong hydrocarbon generation capacity.There are four main control factors in Jiyuan region.High quality source rocks provide the material basis for reservoir formation,while the underwater distributary channel sand bodies and dissolution pore provide the space.Moreover,the residual pressure provides the main impetus for the hydrocarbon migration,and oil and gas move along sands and cracks,developing the multi-layer reservoirs.The main control factors have a different effect on the different layer reservoirs.From Chang 2 group to Chang 9 group,sedimentation and diagenesis have a gradually increasing control,while tectonism has a gradual weakened control.There are mainly two kinds of accumulation models in the study area.
出处
《石油地质与工程》
CAS
2016年第3期28-31,146,共4页
Petroleum Geology and Engineering
基金
国家科技重大专项“大型油气田及煤层气开发”(2011ZX05001-004)资助
