The Research Of Oil&Gas Accumulation Congditions Of Putaohua Reservoir At The Southern Area Of Zhaoyuan Of The Northern Parts In Songliao Basin

In this paper, the latest of subtle reservoir forming theory as the guide, the aobaota, Aonan area for oil and gas accumulation is studied, established the hydrocarbon accumulation mode, prediction of favorable area, so as to guide the oil and gas exploration.The structural characteristics of the south tower, Ao Ao Bao, the structure is a nose structure form of the north south high low high low intermediate, things on both sides, including anticline, fault nose, fault block three kinds of structural traps. Through drilling and reservoir, tectonic, fault, lithology and complex four categories of11kinds of main the Putaohua oil layer reservoir type. Fault oil and gas reservoirs are mainly distributed in northern and central, lithologic oil and gas reservoirs are mainly distributed in the south. The distribution of oil and water by structure and lithology control, the north is mainly controlled by tectonic, the south is mainly controlled by lithology. The Portuguese35,365, Ao, Ao Pu233-5513well field, north of the high position of the structure for reservoir, low position of oil-water layers, oil-water relationship is more complex; the southern oil. According to geochemical indexes analysis, the study area Putaohua oil mainly come from the green and tender a source rock in Gulong sag and three Sanzhao sag, two sets of source rocks with high organic matter abundance, type Ⅱ, into mass expulsion period in the deposition of Nenjiang formation deposition to the end of the three century ago. Through the relationship between temporal and spatial distribution of oil-gas reservoir and reservoir forming condition, is mainly controlled by tectonic, lithologic hydrocarbon source rocks, three factors in formation of reservoirs in this area.Oil and gas retention effect is grape Aobao tower and Aonan area Putaohua oil reservoir of the main mechanism of gas, the accumulation model for formation are fault. Tectonic lithologic trap accumulation mode. According to the structure, the results of prediction of reservoir thickness, deposition and distribution, on the area of oil and gas drilling and oil and gas accumulation conditions of the Putaohua oil layer was evaluated, the west slope zone have great exploration potential, which part and southwest part region as a class Ⅰ favorable area, the Eastern saddle with the most potential area is the southeast corner of the Mao Mao Mao6well area201-202.