Research On Continel Gravity Flow Deposits In No.1 Member And No.2 Member Of Nenjiang Formation Of Central Depression In The North Songliao Basin

To seismic sedimentology and sediment dynamics as atheoretical basis, on thebasis of integrated application of drilling data, logging data, modernsedimentology and geophysics, Using three-dimensional seismic data, seismic attribute analysis andformation through the sections of sedimentary system, the plane distribution ofsedimentary facies, the spatial distribution of gravity flow, geometry,sedimentary composition, reservoir characteristics and hydrocarbon potentialare studied.By analyzing and drawing based on the results of previous studies, top of the development of the waterways system of the Nenjiang is further improved.In Changyuan relatively large work area waterways are found, and its southern connected with contiguous waterways of Xingshugang,and the northern end has been extended to the north of the delta system and the Qijia Changyuan work area north of the delta system.Changyuan work area of the waterway is 27km from north to south. The entire waterway system is 97Km from north to south, width of channel is 170～500m, thickness is 1.2～6.0m, in waterways system, terminal fan are rich mud, main channel and the end of the fan are rich sand.It is indicated that the turbidite channel systems are formed in the tectonic environment where the slope degree is less than 1°in the period of transgressive depression lake, and Its dynamics mechanism is that flooding water flows directly to the lake. In addition,Large scale developed turbidite channels and lacustrine fans are discovered inother area of No.1 Member of Nenjiang Formation of Central Depression, for example, the Talaha belong to the three-dimensional seismic QiJia _Gulong,An_Da, Sheng-ping, Zhao 35,Yu_Xi Chaoyanggou seismic work area,belong to the three-dimensional seismic San_Zhao.Six slump fan bodies were found in No.2 Nenjiang of the northern Songliao, Including Lamadian LMD fan bodies, three-dimensional work area south of Jin 28, central work area in the Qijia Nan and Changyuan, the SET fan bodies, MX fan bodies, Ao-9 three-dimensional work area and south of Zhaoyuan work area.And the development of its distribution of fan bodies,and causes are Detailed analysisBased on Research on gravity flow, analysising the reservoir properties of the channel sandstone and the conditions of source rocks, hydrocarbon analysis; for analysising the accumulation to fans slump, forecasting the gravity flow channel and slump fan Favorable exploration area and horizon.