Horizontal Wells Oil Lifting Methods And Application Research

Horizontal wells is an effective production technique to slowing the oilfield decline and it has been widely used in the Daqing oil field, but there are still many problems in the lifting of horizontal wells and need to research. this paper researches the lifting method in horizontal well from the theory and laboratory simulation method. And used in Daqing oil field.According to the characteristics of Daqing oil field outside, from the formation percolation theory, string theory and indoor simulation mechanics, the horizontal oil wells lifting method was studied. the main results obtained are as follows:(1)Research has been predicting horizontal well productivity and reasonable method of production pressure. Optimization of horizontal well productivity method of calculating the actual conditions established for the oil production capacity analysis model. Badu & Odeh method consistent with the actual production.Critical production of horizontal well to calculate the level of bottom water breakthrough time, the study of thick oil water coning control technology. Calculation of pressure distribution of horizontal well established model, a horizontal section of the pressure gradient equation; a reasonable flow pressure formula, drawn into the dynamic curve, reasonable range of flow pressure 2.1-2.6Mpa for Zhaozhou oilfields test.(2)Horizontal wells designed to pump deep drawing process pole column. Design of horizontal well technology column and a single pump lift the pump rod string combination process, the design of new high-angle pump; of deep horizontal wells pumping rod sucker rod pump force analysis, research righting technology. Field application of the desired effect, to meet the horizontal well flow pressure conditions in different lifting techniques of effective demand.(3)Development of multi-function lifting simulation test device, the pump can be an inclination (continentally changing from 0°to 90°), different media, under different conditions Experimental study on characteristics of pump for sucker rod pump in the complex conditions on the applied research and development of new lifting technology to provide effective testing means. (4) Evaluated Lifting of the existing technology of horizontal wells adaptability, a single pump can be well section in the slope of the smaller applications, the combination of the pump than a single pump to increase under the deep new understanding of 200 meters. Design and development of horizontal well productivity analysis and production pressure design software is able to calculate the properties of high pressure, productivity prediction, the critical capacity and water breakthrough time calculations, and the factor analysis of horizontal wells production.Oil lifting through the horizontal well and its application research in Daqing Oilfield has been applied to obtain good results.