Study To Cementing Quality Of The Two Kinds Produce Layer In Daqing Oilfield The Trice Adjusting Well

Daqing oilfield is uneven multiplayer oilfield that developed by water flooding in the early period. Various sediment modes, sand type and uneven characteristic between plane and interlayer are based on the contradictions in the inter-layers, between the inter-layers, and complicate distribution of porous pressure. At present, we are processing the trice adjusting well for operating the thin and piece oil layer, another side for producing the potential oil between the inter-layers. The key for the both sides is effective inter-layers that derived from the well quality of cementing.At the present condition, the high pressure and lower penetrability formation, low pressure and high penetrability formation in the drilling profile are main geology factor that affects the quality of cementing. So the study to this two kinds of produce layer is the most important for drilling safety and improving the quality of cementing.The purpose of our work is that get the target and technique of pressure adjustment through the analysis of formation porous pressure that affects the quality of cementing, regulation of pressure change for infilling wells, technique of pressure dropping for whole block, technique of pressure discharge for high pressure, maintaining pressure in high pressure and lower penetrability formation. The main complexity is resolved by studying affection factors to cementing quality, profiling the cementing design program, applying reasonable cementing slurry system and cementing method.Remarkable performance is that it can not only ensure the drilling safety, but also improve the cementing quality, and avoid bottom-hole incident due to high drilling fluid density be used because of the density of drilling fluid decreased. Decrease the drilling cost, reduce the reservoir pollution. After success, it can apply in whole Daqing oilfield.