摘要
碳酸盐岩油气藏一直是我国油气勘探开发的重要领域,然而漏失造成的储层损害极大地阻碍了碳酸盐岩储层的及时发现、准确评价和高效开发。以川东北雷口坡组、嘉陵江组、飞仙关组、长兴组碳酸盐岩储层为研究对象,对工区储层钻井完井液漏失储层损害模式进行了详尽探讨。工区碳酸盐岩储层多产层多压力系统、裂缝发育、高含硫化氢与二氧化碳,漏失时有发生,储层损害严重。漏失对储层的损害宏观上包括层内损害模式和层间损害模式,层内及层间损害模式可进一步细分为独立裂缝、裂缝网络、裂缝溶洞、溶洞裂缝复合等四种基本模式。针对储层地质特征及漏失损害模式,提出了屏蔽暂堵技术预防储层漏失和保护储层技术,室内实验和现场试验表明,该技术有着较好的应用效果。
Carbonate reservoir is an important area for China's oil and gas exploration and development.Damage to the reservoir caused by leakage and other factors,which hindered discovery,evaluation and development of carbonate reservoir in China.The paper took Leikoupo group,Jialingjiang group,Feixianguan group and Changxing group carbonate gas reservoir in Northeast Sichuan Basin as the research object,the damage models of carbonate formation damage leading by drilling fluids leakage were discussed.There are many potential factors of formation damage in these carbonate reservoir including multi-layer pay,complicated pressure systems,numerous fractures,a large number of potential damage materials as well as leakages,low water saturation and high content of hydrogen sulfide and carbon dioxide.Leakage damage included interlamination damage pattern and inter-layer damage pattern,which further divided into independent fracture pattern,the fracture network model,fracture cave pattern,cave fracture complex pattern.In view of reservoir characteristics and leakage damage models,temporary shielding plugging technologies applied for the prevention leakages and protection reservoir was put forward,laboratory and field tests showed that the technology had a better effect.
出处
《钻采工艺》
CAS
北大核心
2009年第5期9-12,共4页
Drilling & Production Technology
基金
国家重大专项"碳酸盐岩缝洞型储层保护技术配套"(2008ZX05049-03-03)
四川省杰出青年学科带头人培养基金项目(07ZQ026-113)
关键词
碳酸盐岩
裂缝
漏失
损害模式
屏蔽暂堵
carbonate reservoir,fracture,leakage,damage model,temporary shielding plugging
