Research On Pressure Prediction And Testing Technology Of Adjustment Well

In view of the land facies non-isotropic multi-pressure system on the adjustment well, in the oil-field development later period, the main force oil layer watery rise and output decreases, the development of old sub-area's high seepage layer and the thin difference layer is an important task, therefore the good insulation is needed during layer and interlayer. The pressure profile adjustment reduces the high-pressured lamination strength, maintains the low-pressure lamination strength, realizes reduces to the oil layer pollution, reduces the drilling cost based on the existing oil-field development plan. The oil-field development later period pours water, the note to gather, three extractions and many kinds of ways are used, through the well pattern encryption adjustment, the note picks the position to subdivide to the sedimentation unit, specially on the high seepage and low pressure layer, good insulation is used to degree difference, the flooding rank low position. In view of this request, the geology forecast technique, the well completion technology's research must suit in the oil-field development. According to the Daqing Oil Field reservoir layer pressure influence well cementation quality, research on the pressure profile adjustment is essential.In the drilling process, through the pressure profile adjustment, reduces the layer pressure and the link spatial pressure, realizes the protection on oil gas layer, provides a stable underground environment for the enhancement adjustment well quality. Establish the reservoir pressure calculation model, the abnormally high pressure level recognition technology, form a set of the pressure profile adjustment technology in view of the different pressure profiles'characteristic, at present, some basic research on the pressure system's model building, the water-injection well pressure and the formation pressure relations research, the decompression effect and low pressure pressure maintenance method has been done. This research is advantageous to the oil-field development later period adjustment well drilling, has the widespread application prospect and the practical value.The research on the pressure stable time of voltage dropping water-injection well and the stable surface pressure forecast technique; Using the water-injection well head uniform pressure, the fluid plunge the well chamber recognition technology forecast formation pressure; The water-injection well puts overflows the decompression and guarantees presses the irrigation effect research to solve the abnormally high pressure level and to infiltrate the level, the mudstone level recognition and the pressure explanation; solves under the non-isotropic anomalous boundary the reservoir pressure forecast. Raises the forecast, designs the drilling density, reduces the mine shaft complex accident. May complete the adjustment well technology, improved three encryption adjustment well cementation quality, for hundred year oil field to provide the premise safeguard.