BH-KSM钻井液在冀东油田南堡3号构造的应用  

Application of BH-KSM Drilling Fluid in Nanpu #3 Structure of Jidong Oilfield

作　　者：李栓 张家义 秦博[2] 尹丽 巨波 王维[3] 

机构地区：[1]渤海钻探泥浆技术服务公司 [2]冀东油田钻采工艺研究院 [3]冀东油田勘探开发项目部

出　　处：《钻井液与完井液》2015年第2期93-96,104,共4页Drilling Fluid & Completion Fluid

摘　　要：冀东油田南堡3号构造储量大、埋藏深,该地区部署的深井、超深井存在井温高、位移大的特点。通过实验优选出了氯化钾抗高温钻井液体系(BH-KSM)。该钻井液抗温达200℃;具备优良的抑制封堵性和抗CO2污染能力,解决了南堡3号构造深井存在的井壁失稳、高温蠕变、地层流体污染等技术难题,形成了适合该构造深井的配套钻井液技术。现场应用的10口井东营组易垮塌地层井眼扩大率均小于7%,最小的仅为3.98%;现场钻井液流变性能稳定,高温高压滤失量小于12 m L;包被抑制能力强,返出岩屑完整不分散;携砂、携岩能力强,解决了三开大井眼、裸眼段长的井眼净化问题,提高了机械钻速。The Nanpu #3 Structure in Jidong Oilfield has big reserves which are deeply buried.Deep and ultra-deep wells have been drilled in this area with high bottom hole temperatures and large horizontal displacements.A high temperature KC1 drilling fluid,BH-KSM,was formulated for use in this area.BH-KSM remains stable at temperature up to 200℃,and has excellent inhibitive and sealing capacity,and tolerance to CO_2 contamination,essential for dealing with borehole instability,creep of formation at elevated temperatures,and contamination to drilling fluid by formation fluid in Nanpu #3 Structure.Technology for field application of the BH-KSM was engineered for maximum functioning of the mud.Field application of BH-KSM in 10 wells in the Nanpu #3 Structure showed that percent hole enlargement in the Dongying Formation,known for its being water sensitive and prone to collapse,was less than 7%,and the minimum of which being only 3.98%.The mud had stable rheology during drilling.HTHP filter loss can be kept under 12 mL.Cuttings over shale shakers were hard and had good integrity,illustrating good inhibition of the BH-KSM.Good carrying capacity of the mud resulted in satisfactory hole cleaning and increasing rate of penetration.

关 键 词：氯化钾抗高温钻井液 井壁稳定 井眼净化 深井 大位移井 

分 类 号：TE254.3[石油与天然气工程—油气井工程]