KCl聚磺钻井液体系在延长气田水平井的应用

发布时间：2018-04-15 11:22

本文选题：延长油田 + 地层　；参考：《天然气勘探与开发》2016年04期

【摘要】：鄂尔多斯盆地气藏类型多为低孔低渗砂岩气藏,通过水平井技术扩大泄流面积,充分挖掘储层潜力,提高单井产量,达到提高气田开发效益的目的。延长气田自2011年开始水平井钻探,但是钻井过程中经常钻遇井漏、井塌等复杂事故,钻井周期长、成本高,水平井开发效益不明显。通过对水平井的地质、工程概况和钻井液技术难点进行分析,针对气田水平井井壁失稳和井漏等两大突出问题,结合地层对钻井液抑制性和封堵性的要求,对比聚磺钻井液和KCl聚磺钻井液的抑制性和封堵性,KCl聚磺钻井液体系具有强的抑制性和封堵性。现场两口井应用证实,KCl聚磺钻井液具有预防垮塌与漏失的优点,钻井周期短,无复杂事故发生,经济效益明显。
[Abstract]:The types of gas reservoirs in Ordos basin are mostly low porosity and low permeability sandstone gas reservoirs. Through horizontal well technology, the discharge area is expanded, reservoir potential is fully exploited, single well production is increased, and the benefit of gas field development is improved.Yanchang gas field has been drilled in horizontal wells since 2011, but in the process of drilling, complicated accidents such as well leakage and well collapse are often drilled, the drilling period is long, the cost is high, and the benefits of horizontal well development are not obvious.By analyzing the geology, engineering situation and drilling fluid technical difficulties of horizontal wells, aiming at the two outstanding problems of horizontal well wall instability and well leakage in gas field, combined with the requirements of formation for drilling fluid inhibition and plugging,Compared with the inhibition and plugging properties of polysulfonated drilling fluid and KCl polysulfonated drilling fluid system, KCl polysulfonated drilling fluid system has strong inhibition and plugging property.The application of two wells in the field proved that the KCl polysulfonated drilling fluid has the advantages of preventing collapse and leakage, short drilling period, no complex accidents, and obvious economic benefits.
【作者单位】：西安石油大学;陕西延长石油(集团)有限责任公司油气勘探公司;
【分类号】：TE254

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