摘要
塘29-26c区块主要目的层为一套泥岩和泥质白云岩互层的自生自储的非常规油藏,该油藏被多条断层切割,形成多个单斜断块,硬脆性泥岩、白云岩地层由于由于应力集中极易坍塌,邻井在施工过程中发生多次井漏、划眼、井喷及卡钻等事故复杂。在该区块新部署的3口评价井储层井段应用了BH-KSM钻井液体系,利用聚胺抑制剂、KCl和抗盐包被抑制剂的协同作用增强钻井液抑制性,使用抑制防塌剂BZ-YFT配合细目钙和抗盐降滤失剂BZ-JLS-I改善泥饼质量并控制好滤失量,使用低渗透封堵剂BZ-DFT配合不同粒级的刚性封堵颗粒QS-2,提高钻井液的高温封堵能力。应用结果表明,BH-KSM钻井液解决了硬脆性泥岩、白云岩地层的坍塌问题,顺利实现了对该区块非常规油藏的勘探开发。
The reservoir of block Tang29-26c is of self-generation and self-accumulation abnormal reservoir with interbed formation of claystone and argillaceous dolomite and of that is cut by several faults,which is easy to collapse.According to the lithology conditions of this block,the BH-KSM drilling fluid system,cooperated with polyamine,KCl and other inhibitors,is applied to prevent collapsing,and the applications are successful.
出处
《钻井液与完井液》
CAS
北大核心
2013年第3期88-90,98,共3页
Drilling Fluid & Completion Fluid
