Fine Reservoir Description Of S 150 And S 161 Fault Block In Liaohe Oilfield

The article studies the work area of Shen150-161, which is located in the borders of Fahaniu, Qianjin and Damintun of Xinmin city in Liaoning province. Its regional structural location is in the north of Rong Sheng Pu depression of Damintun sag, whose north border is Shen116 fault, west adjacent area is Block Shen69, and east adjacent area is Jing An Pu oilfield. Reservoir rock type is mainly medium-fine arkose, with deeply weathered and poor reservoir physical property. The oil reservoir belongs to typical low permeable deep seated reservoir. From its development in 1990, the reservoir's development process has revealed distinct interlayer interference because of obvious interlayer property difference and long interval, which gives reasons to deepening cognition of the reservoir, establishing fine 3-D geological model, carrying out research on distribution of remaining oil and putting forward measures for tapping potential.On the basis of meticulous and quantitative reservoir geological research, starting from geology, logging, oil reservoir engineering and so on, the study proceed fine reservoir description research is unfolded with the centre of reconstructed geologic model. In geological aspect, guiding by sedmentology, using cycle contrast method namely"cycle as the basis, controled by key bed, contrasting through three grades, subdivided by degrees", refinement single layer model containing seven groups of oil-bearing horizon and ninety-two single layers are established. According to lithofacies, paleontological and electrical marks, the type of sedimentary micro-facies and its developmental character is confirmed, the research on profile sedimentary micro-facies is carried out, and sedimentary micro-facies and sand body distribution law is further analyzed. And united the explanation result of log parameter, the reservoir 3-D geological model is established including oil pool scale, sublayer scale, and single sand body scale.In the aspect of oil reservoir engineering, according to producing degree of waterflooding, control degree of waterflooding, economic critical pattern size and so on, the adaptability of block well network is evaluated. Through analyzed the relationship between water cut and degree of reserve recovery, the relationship between water drive index and water cut, and effectiveness of water injection etc., the block's development level is comprehensively evaluated, the oilfield integrated model is established, the reserve curve fitting and production history fitting is accomplished, and then the distribution law of remaining oil is studied. On the base of these, the concrete comprehensive adjustment and disposition suggestions are advanced at last.