Abnormal Fluid Infusion Wellbore Identification Technique And Cementing Quality Research

Daqing oilfield is uneven multiplayer oilfiled 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 intralayers,between the interlayers, and complicate distribution of porous pressure. In the course of water flooding for development, because of the complexity of the distribution of oil and water, and moving order, apart from the affect from the plane distribution of infilling and producing wells, the porous pressure of reservoir will be controlled by the distributing range, extending directions and difference in physics characteristic of sand body, it has the bigger differences in directional and vertical. 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 interlayers. The key for both sides is effective interlayers that derived from the well quality of cementing.In the present drilling construction conditions, large annulus pressure difference is to influence the cementing quality of main geological factors, based on the analysis of the daqing oilfield reservoir pore pressure characteristics of the premise, in digital logging technology and RFT technology as the foundation, from logging principle and basis for differential pressure filtration potential and the correlation of continental sandstone reservoir permeability is put forward in the development process of reservoir pore pressure well logging interpretation theory and a detailed discussion on the well logging interpretation pore pressure basic math modeling, parameter range of determination method, method of operation and in oil field drilling and oil field development in the specific application. Pore pressure log interpretation method has high precision, low cost, the maneuverability is strong characteristic, in the process of oilfield development has broad application prospects. This method is in the process of oilfield development of reservoir pore pressure interpretation provides a new train of thought, have certain academic value.