论文部分内容阅读
柴达木盆地北缘大柴旦区块的平顶山—黄泥滩构造带、大柴旦断陷带和欧南断陷带油气成藏条件各不相同。绿梁山南翼的平顶山—黄泥滩构造带中、下侏罗统暗色泥岩发育,古近—新近系和中生界冲积扇、河流—泛滥平原相沉积中砂泥岩储层广布,背斜构造发育,且形成时间早,有利于寻找构造油气藏;绿梁山北翼的大柴旦断陷带侏罗系暗色泥岩也很发育,烃源条件良好,但断裂作用强,构造破碎,以寻找小断块、断鼻和岩性地层圈闭油气藏为宜;东部欧南断陷带侏罗系烃源岩发育,侏罗系、白垩系及古近—新近系碎屑岩储层发育,并且周边地区也获得工业油流或见不同程度的油气显示,但缺少构造圈闭,应以寻找岩性和地层圈闭油气藏为主。
The Pingdingshan-Huangniatan tectonic zone, the Daqidan rift zone and the Ou-Nan fault zone in the northern Qaidam basin of the Qaidam Basin have different hydrocarbon accumulation conditions. Middle and Lower Jurassic dark mudstones developed in the Pingdingshan-Huangnitan tectonic belt along the southern wing of Luliangshan Mountains, and there are alluvial fans in the Paleogene-Neogene and Mesozoic strata. The sandstone and mudstone reservoirs are extensively distributed in river-flood plain facies, anticlines The tectonic development and formation time are favorable for the search for tectonic reservoirs. The Jurassic dark mudstone in the Daqidan faulted zone in the northern wing of the Liangliang Mountains is also well developed, with good hydrocarbon source, but strong fracture and tectonic fragmentation in search of small Fault block, nosebreak and lithostratigraphic trap reservoirs; Jurassic source rocks, Jurassic, Cretaceous and Paleogene-Neogene clastic reservoirs are developed in the eastern Ou Nan Depression, and The surrounding areas also receive industrial oil flow or oil and gas show to varying degrees, but the lack of structural traps, should be looking for lithologic and stratigraphic trap reservoirs based.