无固相KCl聚合物钻井液体系在伊拉克鲁迈拉油田的应用

Application of No-solid KCl Polymer Drilling Fluid System in Iraq Rumaila Oilfield

摘要:

伊拉克鲁迈拉油田三开地层存在大段的泥页岩，易发生剥落坍塌，储层砂岩段长，渗透性好，易发生渗漏和形成小井眼。钻井液体系从一开始单纯追求井下的稳定性，到兼顾井壁稳定、储层保护、S型和J型井的摩阻降低，最终形成了无固相KCl聚合物钻井液体系。主要从室内实验和现场应用方面详细阐述了体系的形成和现场应用效果。

Abstract:

There is a large section of shale formation in Iraq Rumaila oilfield, spalling and caving-in happen easily. The sandstone reservoir is thick and permeable, which is prone to leakage and generating slim hole. In the reservoir with good permeability, leakage and slim hole are often met. From the simple pursuit of the downhole stability at the very beginning to that the borehole wall stability, reservoir protection and lower friction in S & J shape wells are then taken into account, today's no-solid KCl polymer drilling fluid system is formed. The paper describes the formation of this drilling fluid system and the application effect in the laboratory experiments and the field application in detail.