邦亚租区丛式定向井钻井提速试验  

EXPERIMENT ON IMPROVING DRILLING SPEED OF CLUSTER WELL AND DIRECTIONAL WELL IN BANYAZU AREA

作　　者：陈作[1] 王忠生[1] 熊祖根[1] 滕华信[1] 

机构地区：[1]四川石油管理局钻采工艺技术研究院

出　　处：《钻采工艺》2005年第6期1-3,共3页Drilling & Production Technology

摘　　要：邦亚租区的上部地层软,成岩性差,为大段泥岩、页岩、流沙夹石英砂岩;下部地层成岩性较好,以泥岩、页岩为主夹砂岩。地层软硬及可钻性差别大,钻头选型难全部兼顾,用牙轮钻头起下钻次数多,机械钻速慢;用PDC钻头,容易泥包,在石英砂地层钻进易损坏。如果按通常做法,以调整维护好钻井液性能来保证井下安全,加强井斜、磁场监测、及时更换钻具组合控制井眼轨迹等方法,不但使钻井时间增加,反而会添新麻烦,甚至导致填井、报废等严重后果。根据邦亚租区的实际问题,进行了设计优化、设备优选、参数强化,新技术的成组应用,采用了灵活的井身结构设计、灵活的井眼轨迹剖面设计,进行了钻头及井下马达和钻具组合优选,使一套钻具组合具有多种功能,强化了钻井参数,坚持喷射钻井,根据地层情况优化钻井液性能和钻井方式。施工精准、高效,预测、评估及时,效果显著。As the upper formation in Banyazu area is mudstone, shale and quartz sandstone, so it is soft and its lithology is had; but as the under stratum is mainly hogging such as mudstone and shale, so its lithology is much better. The different formation (soft and hard) influenced in many drilling problems such as big difference in drill ability, hard to choose bit type, the increase on tripping times of roller bit and slow ROP; moreover if it were drilled in the area with PDC bit, it should be easy to ball up and to damage in quartz sandstone. According to the conventional methods that adjusting the drilling fluid for well bore safety, enhancing the hole inclination and inspecting the magnetic field and taking place of the drilling strings for well path control, it were no use for solve the problem, but it can increase the drilling time, and affect on the backfilling well and abandoned well. Based on the practical problems, the paper discusses many new technologies and advanced techniques used in Banyazu area: such as optimizing drilling design and equipment, optimizing properties of drilling fluid and drilling model and stimulation parameter. It is obvious that the operation effect is much better.

关 键 词：丛式井 定向井 钻井工艺 提速 

分 类 号：TE243[石油与天然气工程—油气井工程]