哈拉哈塘地区奥陶系碳酸盐岩保护储层钻井液技术  

Drilling fluid technology of protecting Ordovician carbonate reservoir in Halahatang area

作　　者：喻化民 田惠 吴晓花[2] 李海彪 薛莉 王家梁 YU Huamin;TIAN Hui;WU Xiaohua;LI Haibiao;XUE Li;WANG Jialiang(Engineering Technology Research Institute,CNPC Bohai Drilling Engineering Company Limited,Renqiu Hebei 062550,China;Research Institute of Oil and Gas Engineering,PetroChina Tarim Oilfield Company,Korla Xinjiang 841000,China)

机构地区：[1]中国石油渤海钻探工程技术研究院,河北任丘062550 [2]中国石油塔里木油田分公司油气工程研究院,新疆库尔勒841000

出　　处：《石油化工应用》2018年第11期76-83,119,共9页Petrochemical Industry Application

摘　　要：哈拉哈塘地区奥陶系碳酸盐岩储层缝洞发育,漏失污染及其诱发的储层损害严重制约了油气藏的高效勘探开发。从储层特征和储层损害机理分析出发,明确了储层损害的主控因素,提出了碳酸盐岩储层保护基本思路。针对不同裂缝宽度的碳酸盐岩储层进行了保护储层钻井液技术研究,结果发现:在钻井液中加入随钻矿物纤维可变形粒子,可显著提高裂缝宽度为50μm、75μm储层渗透率恢复值,但对于宽度为105μm的裂缝,尚需加入大颗粒堵漏材料才能在近井壁带形成致密封堵层,此结果对设计保护配方和制定保护措施具有重大指导意义。室内采用随钻防漏堵漏技术和屏蔽暂堵技术相结合方法优化储层保护配方,使钻井液渗透率恢复值得到了较大程度提高。现场应用表明,该配方性能优良,渗透率恢复值能达到67%以上,对储层的保护达到了预期效果。The fractures of Ordovician carbonate reservoirs in Halahatang area develops highly, and serious pollution by leakage and formation damage restrict reservoir exploration and developments. Aimed at these problems, reservoir characteristics and reservoir damage mechanism were analyzed, main controlling factors were made clear, and basic thinking of carbonate reservoir protection were described. Protections of carbonate reservoirs with different fractures were studied, and results showed the permeability recovery of fractures with 50μm and 75μm were high improved after adding the fiber deformable particles, but for the fractures with 105 μm, large particle plugging materials were necessary. This result has important guiding significance for designing formulas and developing protective measures. Lost circulation prevention and plugging while drilling and shielding temporary plugging technique were eombinated to optimize the protection formula. The field application showed that the optimized formula had excellent performance,the permeability recovery got 67 % above, and achieved the expected protection effect.

关 键 词：碳酸盐岩储层 缝洞发育 防漏堵漏 屏蔽暂堵 保护储层 

分 类 号：TE254.4[石油与天然气工程—油气井工程]