Research On The Full Information Interpretation Of 3D Seismic On Lixian Slope Of Raorang Sag, Heibei Oilfield

The oil-rich sag of north China oil field has several decades exploration history, in which the traps of large scale, shallow burial depth, simple structure have been found and drilled; the structural traps of good form, large area, good accumulation condition are more and more difficult to find. The status of this oil field is low of resource conversion rate, but the residual resources are still abundant, therefore, it's needed to increase exploration. With the hydrocarbon geophysical exploration technology development, especially the development of 3-d seismic exploration, the main way of the increasing of oil reserves is anew developing high precisim 3-d seismic to old oil field and realization potential tapping to old oil field. Raoyang sag is one of oil-rich sag in central Heibei area, which has rich oil and huge exploration potential, and it's exploration area is about 5280 km~2 . Lixian slope is a part of Raoyang sag and it's very important exploration area. It is ne-trending and successive slope, the exploration area is about 2000 km~2, accouting for one third of Raoyang sag. It has good prospect for enlarging oil and gsa output.With the increase of 3-d seismic technology, the single structural interpretation of 3d seismic data has transformed to mainly based on 3d seismic data, comprehensively utilized existing logging, mud logging and others exploration data to provied oil-bearing structure information, lithologic features and predict oil and gas bearing serics. Mininging all of available data to apply in petroleum exploration and development has become one of the hotspots in the research.This paper carries out 3-d seismic cubic interpretation and use coherence cube, seismic attribute extraction, impendance inversion, frequency division interpretaion of such advanced technology, based on mainly the 3-d seismic data of Raoyang sag , Lixian slope and combined with logging, mud logging data and so on. Study the following main content:â‘ explore the full information interpretation method of 3-d siesmic data that is suitable for oil and gas bearing geological characteristics in Lixian slope, Raoyang sag, north China oil field.â‘¡Based on mainly 3-d seismic, we establish the full information geophysical model for Lixian slope, it includes: structure- geophysical model, lithology- geophysical model, formation- geophysical model and reservoir- geophysical model. In this paper, the main research results are:â‘ It's the first time to carry out full information interpretation of 3d seismic data in Lixian slope, Raoyang sag, provide a feasible technical scheme to expand reserves and propect oil and gas in north China oil field.â‘¡We use the established geophysical model to carry out the full information interpretation in the southeast wing of Yanling, Lixian slope and delineate new subtle reservoir.