Conduit Systems & Reservoir Controlled Model Searching In Dongying Depression

According to the exploration practice and the theory searching of the Mesozoic-Cenozoic petroleum basin in East China, Chinese geologists proposition Source control theory and Multiple oil-gas accumulation zone based in Songliao and Bohai Bay basin. Source control theory points out source rock sag control the oil fields distributing. Multiple oil-gas accumulation zone points out the pools controlled by sub-structure belt in basin. Multiple oil-gas accumulation zone forming multi-type reservoir assemblages, trap styles and the assemblage style control reservoir. Along with the prospect mature degree increased in East rift basin, the effective of the trap has to be distinguished. Migration searching grow to the main forecast element. Contrast to the dynamic manner and the mode of migration, the static state form of migration - conduit systems, have preferably operable characteristics. Source control theory depends on the source rock sags, figure out the presence or no of oil in basin from hydrocarbon generated. Multiple oil-gas accumulation zones depend on the trap assemblages, forecast the pool distributing in basin from accumulation. Based on the conduit system, the forecast precision of the pool could be figure out and improved in petroleum basin.Conduit system is the physical presence form of the relation between the source rock and the traps, also the signify criterion of the trap's effectiveness. The conduit system is consisted of faults, fracture, framework sands, unconformity beds and their compositions. The main pathway of hydrocarbon migration has been proved by theory searching and exploration practice. The conduit system has the limited action in time and space controlled by the faults active mechanisms. The effective conduit system is the action conduit system in effective time and space. The model and the efficiency of hydrocarbon migration is controlled by the effective conduit system styles. The distributing of the pools is controlled by the conduit system also.This paper based on the elements analysis and the study of the controlled factors in Dongying depression, joint with the mechanisms analysis of faults, fracture, frame sands and the unconformity beds, illustrate the static style and the dynamic evolvement of the conduit systems in rift basin. It points out that the conduit systems controlled the styles and distributing of reservoirs in the way of static, dynamic and ration in basin. The distributing rule of the pools in the way of section, plane and migration direction in basin, associated with the single factor and multi-factor composite analysis, point out the conclusion of the Conduit system control reservoirs. This paper points out the conduit systems and their distributing rules control the classification, stratification and distributing of reservoirs in the manners of section and plane. Based on all this, two typical composite styles of conduit systems-Ladder model and "T-S" model has been illustrated in continental rift basin. This paper points out that the typical model of conduit systems control reservoirs is not only the composite styles of the conduit system but also the peculiar reflection of the conduit system controlled function. In a word, Conduit system control reservoirs uncover the essence rule of the hydrocarbon migration and accumulation in continental rift basin.