摘要
固满构造带目的层系为新近系中新统,上世纪80年代按照构造类圈闭的思路并无突破,之后油气勘探进展缓慢,近年来通过重新地震处理,认为构造类圈闭在该区并不发育。通过油气源、沉积体系和构造背景分析,该区中新统具备岩性凝析气藏形成的条件。为了更好的指导该区油气勘探,深刻剖析成藏主控因素,首先对地表油苗的来源分析,认为固满构造带主力烃源岩为二叠系泥岩,油气源充足,其次储集层为中新统扇三角洲前缘水下分流河道及河口砂坝沉积的细砂岩、粉砂岩,中低孔、中低渗透率,盖层为与储层交互沉积的泥岩、砂质泥岩。圈闭类型为构造上倾背景下的岩性圈闭。当沟通油源的断裂与上倾砂体组成立体疏导体系时,便会形成岩性凝析气藏,具有可观的勘探潜力,是目前塔西南自柯克亚气田发现以来针对中新统目的层较现实的勘探接替区。
The main layer of Guman tectonic belt is the neogene of Miocene. According to the train of thought for structural reservoirs,there was no breakthrough in the 1980 s. Now we think there are no structure traps in the area through the research of seismic in recent years. Through the analysis of oil and gas source,sedimentary system and the tectonic background,lithologic reservoirs of Miocene are likely formed in the area. We analyze the main control factors of lithologic reservoir deeply in order to guide the exploration in the area better. Firstly,the research on the surface oil output state shows that the main source rock is Permian shale and the source is sufficient. Secondly,the reservoir is sandstone and siltstone,with low permeability and,low porosity,which is located in underwater channel of fan delta. The cover for reservoir is mudstone and sandy mudstone which is interacted with the reservoir. The trap types is updip lithologic trap under the background of structure. The vertical fracture that links with oil and lateral reservoir sand composes stereo channel system for oil and gas.Therefore,Guman tectonic belt is in good accumulation condition and it has considerable exploration potential. It is more realistic exploration replacement area since Kekeya gas field discovered.
出处
《新疆石油天然气》
CAS
2014年第2期1-5,共5页
Xinjiang Oil & Gas
基金
国家重大科技专项塔里木前陆盆地油气富集规律勘探技术与区带和目标优选(编号:2011ZX05003)资助
关键词
固满构造带
新近系中新统
成藏条件
勘探潜力
Guman tectonic belt
the neogene of Miocene
terms of accumulation
exploration potential
