潜山储层损害因素分析及钻井液技术对策探讨——以渤中28-1、涠洲6-1油田及锦州25-1S油气田为例  

Analysis of formation damage factors and discussion on the strategies of drilling fluid technology for buried-hill reservoir

作　　者：李玉光[1] 曹砚锋[1] 何保生[1] 

机构地区：[1]中海石油研究中心

出　　处：《中国海上油气（工程）》2005年第6期403-407,420,共6页China Offshore Oil and Gas

摘　　要：潜山储层和上覆沉积层砂岩储层特性明显不同,因此其损害机理有较大差异。在分析我国近海3个潜山油(气)田储层基本特征的基础上,对潜山储层的潜在损害因素进行了分析,探讨了保护潜山储层的钻井液技术思路和对策。针对潜山储层容易漏失的特点,通过实验对常规屏蔽暂堵技术进行了改进,优选出适用于潜山储层低压差钻进的低固相低压差屏蔽暂堵钻井液。根据潜山储层特征及完井方式,可选择使用无固相无封堵钻井液体系、无粘土弱凝胶钻井液体系和低固相低压差屏蔽暂堵钻井液体系。Formation damage mechanism of buried- hill reservoir may differ seriously from the overlying sandstone reservoir because of the different reservoir characteristics. In this paper, the potential formation damage factors of buried-hill reservoir is analyzed and the technical idea and countermeasures of drilling fluid are discussed, based on the analysis of basic characteristics of buried hill reservoirs of 3 oil （gas） fields offshore China. According to the behavior that buried hill reservoir is easy to lose drilling fluid, the conventional temporary plugging technique is modified through experiments and a new temporary plugging drilling fluid with low solid content is put forward for drilling buried hill reservoir at low pressure differential. The systems of solid-free and non plugging agent drilling fluids, clay-free and weak gel drilling fluids, and low solid and low pressure differential drilling fluids can be used according to the characteristics of buried hill reservoirs and well completion methods to mitigate the reservoir damage greatly.

关 键 词：潜山储层 损害因素 储层保护 钻井液体系 技术与对策 

分 类 号：TE254.6[石油与天然气工程—油气井工程] P618.130.2[天文地球—矿床学]