An optimization method of horizontal well completion control water and sand

Abstract

With the development and maturity of horizontal well drilling and completion technology, horizontal wells are widely used in various reservoirs and have achieved good development results. Due to horizontal wells in the reservoir through a long distance, horizontal section of the reservoir physical property heterogeneity, water avoidance height difference and horizontal wellbore flow with toe effect, leading to production pressure difference and water breakthrough time in all parts of the shaft is different, the level of sand and bottom water cresting is strong heterogeneity, oil well early water breakthrough and local a large amount of sand production, the serious influence of horizontal well production and development of comprehensive benefits. In this paper, based on the prediction model of critical production pressure difference of sand production in horizontal wells and the prediction model of water appearance time of horizontal Wells in bottom water reservoir, the critical production pressure difference and water appearance time of sand production in each micro-element section are quantitatively determined along the horizontal well section, so as to form a design method of horizontal well completion that takes water and sand control into account. And ICD horizontal well completion method as the research object, water breakthrough time, yield as the optimization goal, control sand as constraint conditions, with each section down into the number of ICD string and nozzle sizes as design variables, the ICD horizontal well completion parameters established multi-objective optimization model, obtained the comprehensive consideration of water control sand control effect of the optimal ICD completion program.