The Match Of Fault And Sand Controls Oil Distribution In Fuyu Oillayer In Rang29-41 Well Block In Xinmu Oil Production Plant

The block's structure of Rang29-Rang41 is generally monoclinic structure that its direction is southwest in Xinmu oil production. It mainly developed normal fault that its direction is north-east and nearly south-north. In this paper, the guidance theory is reservoir sediment. With contrasting well network and well to well, we divided Rang 29-Rang 41 of Fuyu reservoir into 12 small layers and 29 time cells based on the 102 wells logs. Furthermore, established electrofacies pattern and conducted phase identification of single well and plane distribution of sedimentary facies. Then, we defined that the study area in Fuyu oil layer is river-shallow water delta sedimentary system in Fuyu oil layer and its source is southwest Baokang.The main reservoir unit is widely developed channel's sand body (both width and thickness are bigger).It's obviously that vertical differentiation of the Fuyu oil layer in study area. There are 4 types of reservoir, including oil layer, oil-water layer, water layer and dry layer. Its the characteristic performance is that the upper profit layer with the lower water layer, and the oil layer located on the partly prominent. The small layers of Fâ… 4,Fâ…¡7 and Fâ…¢9 are the main oil-bearing horizon . The oil control mechanism of the fault and match of sand body in study area is that reverse fault block lithology oil reservoir is composed that the river channel of south-west was occluded by the fault of south-north. The accumulation model is that the oil generation peak is the source rocks of Qingshankou group in syncline area. With overpressure and buoyancy force , the oil arrived Fuyu oil layer along fault , then , oil migrates laterally to the high structure position along dominant channel ( the fault's density zone composed by open fault,crack and sand body of river channel) Finally, the oil aggtegated to form reservoirs in the value structure both sides of the fault's density zone of the study area.By composite analyzing about the controlling factors of accumulation of Rang 29-41 area in Fuyu oil layer , such as the feature of fault and all time cells microfacies (type of microfacies and distribute direction),structural style (dip direction and framework),the structural style of profit and so on. Finally, we elected five oil and gas rich region in study area. At the same time, we divided the 5 oil and gas rich region into 3 categories. It provides guidance for further exploration and development and favorable target area selection of the s research area.