Three, Four Sedimentary System Of GaoSheng Exploration Area

Based on the modern sedimentology, reservoir sedimentology, petroleum geology, new theory, new method and new point of view as the instruction, the integrated use of promotion in drilling, core analysis, well logging data, analyzes the sedimentary system of the district, and the sedimentary facies and sedimentary microfacies are divided. Through a large number of core observation and petrology study, divided into single well facies and logging facies and seismic facies distribution and their mutual relations. For the first time in the western sag of the northern in shahejie three or four paragraphs to a systematic research on the sedimentary facies. Consensus don’t out of the five types of sedimentary facies, respectively, alluvial fan, fan delta, nearshore turbidite fan, gravity current channel and lacustrine facies. Controlled by tectonic movement and boundary faults, coarse clastic sediments for proximal accumulation, content source mainly from western sag on both sides of the central bulge and bump, sediment accumulation mainly along the sag of short axis direction. Promotion of the exploration area in way of shahejie three or four paragraphs consensus don’t out of the seven kinds of seismic facies types:respectively progradation seismic facies, wedge, seismic facies, disorderly filling seismic facies, seismic facies, seismic facies, lenticular earthquake and domal seismic phase; Plane distribution of seismic facies in the plane distribution of sedimentary facies is of great significance. Study area three, four period of formation of sand deposition process has obvious regularity, generally for a water deepening then quickly becomes shallow. Set up four north west sag of sand, sand three sedimentary model. Sand basin formation four sedimentary period is the initial chasmic stage, the lake basin area is lesser, shallow water, the east of the western sag of coarse clastic material along the short axis direction into the lake, the development is given priority to with glutenite fan delta-lake sedimentary system; Three times the deposit period, lake basin in the expansion, in the big range is formed of fan delta-lake sedimentary system; School district because of a border syngenetic fault control, form the south-north movement trough fault gravity current channel deposits; In the deepwater area in the north of Chen jia sub-sag, slump turbidite fan fan delta front slump formation. The results of this area has important reference value for further exploration and development.