杜84块超稠油成对水平井钻井液完井液技术

Drilling fluid and completion fluid technology for paired parallel horizontal wells

杜84块平1-1、平1-2井是中国首例成对水平井,油层为特稠油油藏,地层以砂岩为主,胶结疏松。钻成对水平井的技术关键是井眼轨迹控制精度,并且对钻井液、完井液技术要求高。在大斜度井段使用了XC生物聚合物钻井液,水平段使用了聚合物盐水乳化完井液。现场施工表明,该钻井液、完井液性能稳定,携砂和防塌能力强,润滑效果好,起下钻、电测、下套管顺利。

Du84 Pingl-1, Pingl-2 wells are the first paired parallel horizontal wells, located in extra-inspissated pool in China. To satisfy the practical re-quirment , XC biopolymer mud was adopted in high angle section and salt-water mud was adopted in horizontal section. Applications indicate that good results were got by using these drilling fluids and completion fluids.