A Study On Water Analysis And An Effective Water Control In QHD32-6 Oil Field

QHD32-6 was the first big fluvial facies oil field with high viscosity in Bohai bay, it produced water production from begging, the oil rate decreasing quickly while the water cut increasing .So the main challenge in this field is"water", how to find the water resource and how to grasp the water distuibution law are the key problem. Then you can select good strategy to stabilize the oil production on the base of the study.The comprehensive analysis include sedimentary facies study, oil water contact study, Water Distribution law and water rising study. In sedimentary facies study, we use traditional correlation method, marker bed to control equal elevation, 3Dseismics restriction, sedimentation tracing and balancing and properties section. In OWC recognition, we just combined the seismics, well logging, G&R study. Then we get the law of water distribution.After the comprehensive analysis of geology, reserivor, physics of the Earth and well logging, QHD 32-6 oil field's water-cut variation is controlled not only by the viscosity ratio of oil and water but also by the structure, reserves quality, oil reserves type, production methods, etc. the result show that the field have edge water, bottom water, injection water, and different water have different characteristics.A strategy for having an effective water control and a stabilized oil production was established by basing on understanding of the characteristics of water break through from bottom water, edge water and injected water.The strategy include water shut off, chemical water shut off, bigger pump, selective injection, chemical profile adjustment and horizontal wells in bottom water reservoir. This has brought the QHD32-6 oil field production operation into a manageable position.