Study On Lithologic Traps In Qingshui Sag And Surrounding Sha One Or Two Section

Large most of Western Sag of Liaohe depression is the main oil generation sag, deep and wide. After years of exploration, with the exploration degree of improvement, at present already began to enter the high mature stage, more obvious the main tectonic control of oil and gas fields have been found and fully into the development, and the rest is mainly some of the buried deep, the area is small, the difficulty of exploration of subtle oil and gas reservoirs. In the Western Liaohe depression in Qingshui sag and its surrounding in ancient Paleogene sedimentary period, the basin evolution of the initial rifting, strong fault depression, block fault depression, sedimentary strata exhibit multi cycle. Near Dawa Haiwaihe fault near the main developed fan delta, coastal underwater fan sedimentary system.In the rift basin, the establishment of stratigraphic frame, the Qingshui sag and the surrounding sand 12 segments of each system tract using seismic inversion, geophysical attributes analysis technology forecast reservoir plane distribution for stratigraphic and lithologic traps scale has a guiding role in the model. In Qingshui sag such an important oil and gas rich sag in clastic rock is the main exploration target system study and identification of lithologic traps, the Liaohe West Qingshui sag sag and the surrounding lithology exploration has important theoretical value and practical significance.This research mainly in shallow layers of sand, two section, through the analysis of previous research results, combined with the existing drilling and logging data, the establishment of slope and sag areas unified isochronous stratigraphic framework, the Sha one or two section subdivision system domain, each divided into lowstand, transgressive, highstand two. In the 3D seismic data on fine structural interpretation, the domain analysis system fault recovery, palaeogeomorphology, identification of basin range, carry out sedimentary facies analysis. Comprehensive reservoir prediction technology, fine sand carving, analysis of sand body distribution features, determine the type of lithological trap, analysis of oil and gas. Reservoir comprehensive evaluation, put forward the types of favorable lithologic traps, and promote the lithologic traps exploration, accelerate slope area and negative structure with large and medium-sized oil and gas field discovery process.