普光水平井投产一体化管柱及参数优化

摘要

Horizontal wells in Puguang Gasfield are characterized by significant depth, long and thick perforated intervals. With crisscrossing of Class I, Class II and Class III reservoir formations, relevant reservoirs have severe heterogeneity. Some wells may even contain bottom or edge water. To evenly distribute acid in horizontal intervals to enhance acidification performances, stabilize gas production and minimize water production, fluid-absorption intensities of the formation have been reviewed to de-termine stages of packers, installation positions of sleeves, diameters of sleeves, the quantity of pores, depth of tailpipe and other essential parameters for integral pipe-string required for production of horizontal well in Puguang Gasfield. Through theoretical analyses and numerical simulation, structures of integral pipe-string and optimal operational parameters for production of horizon-tal wells with different completions in high-sulfur Puguang Gasfield have been highlighted. Relevant research results may provide technical guidelines for designing tool string for multi-stage acidization and improving acidization operation in horizontal wells for development of high-sulfur Puguang Gasfield.%普光气田水平井具有井深、射孔井段跨度大、射孔厚度大的特点，储层层间非均质性非常严重，Ⅰ类、Ⅱ类和Ⅲ类储层交错分布，部分井存在边底水。为了实现水平井段均匀布酸、提高酸化效果、稳气控水等目的，通过对水平段注酸井筒流动压力分布、吸液强度分析，确定出普光水平井投产一体化管柱的封隔器卡封段级数、滑套下入位置、滑套孔径、孔数、尾管下入深度等参数。通过理论分析和数值模拟计算，研究了普光高含硫水平井不同完井方式下的酸压（化）投产一体化管住的结构及参数优化方法，为高含硫气田水平井分段酸压（化）管柱设计提供了技术思路，提高了普光水平井的酸压（化）效果。