Anatomy Of The Internal Structures Of Thick Oil Layer And Potentiality Analysis Method On Remaining Oil

Lamadian oil field is mainly based on the thick oil reservoir growth, the 65.7 percent of geology reserves distribute in the thick oil reservoir with thickness is above 2 meters. The investigation result from special high containing water phase indicate that non- equal nature is serious inside the thick oil reservoir, on the one hand it brings the serious crisis of the circulation about down effect and no avail effect picking, another hand the 1/3 of thickness in the thick oil reservoir is still not washing or weak washing, the average extraction level has only about 33%. Though the Lamadian oil field is still developed and adjusted during the 38 years, going through six developing stages, well net density reaches 62.84 wells every square kilometer, but the distance between water and oil well is about 300 meters in the stage of water driving in the various set of layer system, it make the low control level to the layer structure unit under the present well net condition, and the region of not picking perfectly is surplus oil chiefly rich position inside the thick oil reservoir. So on the foundation of well net characteristic is analyzed in the oil field, studying the surplus oil distribution characteristic inside the thick oil reservoir, discussing the picking feasibility under the condition of well net density is denser than now, and combining the field test research, summarizing the adjustment method and system measure under the denser well net picking condition by water driving in the special high containing water phase, it can guide the surplus oil picking method inside the thick oil reservoir by water driving.As following achievements is chiefly gained in this thesis research:The first is on the basis of summing up the developed characteristic at the present well net in the Lamadian oil field, studying the oil field developing situation and the existing question.The second is using the explaining achievements about washing layer of the new well, the material from airtightly taking rock rush pith, the material from the rock rush pith of an oil well wall, the numerical simulation and so on, then summarizing the surplus oil distribution law inside the thick oil reservoir.The third one is from basic storage layer characteristic, regarding the modern deposit scientific principle as guidance, consulting the open country shows one's head material, using the describing method by model forecasting, then forming the building structure anatomizing method inside the thick oil reservoir.The last one is taking the field test as the means, seeking after the path about enhance the well net density by water driving, selectivity perforation, picking the surplus oil from the stratum in the large-scale oil field.