摘要
通过分析低渗透地层孔隙、裂缝特点和目前各油田常用随钻防漏堵漏材料优缺点,针对低渗透地层纳米-微米级细微裂缝的封堵,研制出了一种新型随钻防漏堵漏剂TFD。TFD是由多种天然优质果壳经一系列预处理工艺、超微粉碎和包裹特性高分子量聚合物等工艺并造粒、干燥后制得,颗粒粒径在0.1～200μm范围内可调;具有强度高、延时膨胀性、可变形性、与水基和油基钻井液配伍性好等特点;封堵强度高,能提高地层漏失压力和承压能力,正向突破压力大于12 MPa,反向突破压力大于8 MPa,可起到稳定井壁、降低地层坍塌压力的作用,因此能够扩大安全密度窗口,较好地保护油气层。
A new kind of preventing and plugging agent TFD was developed based on analyzing the characteristics of low permeability formations.It was made from pretreated high-quality shells and polymers,which was superfine smashed dried and granulated with the sizes of 0.1-200 μm.It had the characteristics of high intensity,delayed expansion,deformability,good compatibility with water/oil-based drilling fluid,enhancing the stratum dropout pressure and bearing pressure,and the positive breakthrough pressure was more than 12 MPa,the reverse breakthrough pressure was more than 8 MPa,moreover,it could protect the reservoirs effectively.
出处
《钻井液与完井液》
CAS
2011年第1期20-23,88-89,共4页
Drilling Fluid & Completion Fluid
关键词
防漏
堵漏剂
井眼稳定
防止地层损害
超微粉碎
造粒
Preventing and Plugging mud loss
Borehole stability
Preventing reservoirs
Superfine smash
Granulation
