Study On Reservoir Characteristic And Residual Oil Distribution Of Conglomerate Reservoir, Menggulin Oilfield

This thesis is consisted of five chapters based on the Menggulin conglomerate oil reserves, two major parts are emphasized: reservoir characteristic and residual oil distribution. It includes these follows: Lithology and mineral feature; Reservoir microstructure; Reservoir four physical characteristics: electrical property.. lithology characteristic., physical feature.. oil signatures at last the interpretation chart is established; Reservoir macroscopic heterogeneity and it's effect on waterflooding; Distribution of intermediate layer and barrier, and it's effect on the migration of oil and water; Waterfiooded property. At last the regularity and scope of remaining reserves are studied in detail. According to the results of predecessors and the above mentioned, the major conclusions are presented as followed I. Lithology and mineral feature may be low ingredient and structure maturity. 2. Reservoir have more induced and less primary pore; though the high saturation of irreducible water and the low breakthrough oil recovery factor, the ultimate production factor is high. 3. There is the fine correlativity between porosity and interval transit time, permeability and natural potential. The permeability is more changeable than porosity, and they are controlled by the substratum level, rock texture~ sedimentary environment The reservoir can be described as the middle-porosity low-permeability. 4. The distribution of intermediate layer and barrier is controlled by sedimentary environment obviously. And the level of development, the stability and the connectivity is enhanced gradually from AS to A7. 5. The main factors that affect the water injection efficiency may be the great heterogeneity. In plane, the oil-water migration is controlled by sedimentary environment; in cross section, water wash is non-uniformity. The preferential path and some structure can induce water breakthrough and waterfiooding. The waterflooded characteristic is decided by sedimentary environment permeability and recovery scheme. 6. In profile section, the remaining oil is located in up oil reservoir; in planet in the cone areas.. the zones of barrier and intermediate layer.. the high place dragged by structure and the poor waterfiooded areas controlled by sedimentary enviromnent.