Interpretation Of The Formation Pore Pressure Of Adjust Well In The Peripheric Oilfield Through Logging Curve

In the south Pu-oil-field, Putaohua layer exist seriously heterogenity both vertically and horizontally. Because of water flooding all years, the geologic strata pressure abnormality. After being adjust well hurl to produce, forming the pressure system to be multi-pressure result in the excresvent high pressure areas cover more complicated. because its not enough in the aspects of low permeable layer prediction and explanation make it unexact in judging some high pressure ,increase the error in calculating the small layer pressure and can not design the density of drilling well exactly and logically. Result in very disadvantageous influence to the carrying out constructing of adjust well drilling. the prevention measure to the high pressure layer cannot develop a valid function ,either in the past in the meantime. Cause parts of the wells flow out, well leak even the well spray etc during the process of drilling, which influenced the drilling construction, also influenced the quality of single well cementation.This text aims at the above–mentioned existent problem, base on the geology design and first drilling touch well in south Pu areas. Though the contrast of well-survey data ,combine with the oil field development data to carry on an estimate to the near well layer hole pressure .Tally up ,along with the change of hole pressure ,there show different respond to the well-survey data, especially at the data of AC(acoustict time),SP(spontaneous potential)and R(specitic resistance) .Also combine with the bore log theories, according to the responds of different well-survey data to declue the different calculate method of strata hole pressure . Make sure the position of excrescent high pressure layers, raised the pressure explanation accuracy of low permeability high pressure layers. Provide dependable parameter to the drilling and counteract at different underground condition,mutual complement verification. Process to the PFT test of the calculate results of the strata hole pressure of Putaohua layers. The calculate result of the pressure can satisfy the demands of current drilling well production, both according to the structure circumstance, the sandstone thickness. move-static state analysis ,distribution of oil and water and the influence regulation of drilling and well cementation to different high pressure layers in Putaohua layers, formulate the over well measure ,get good application effect in practically application.