海上压力控制钻井技术在渤中28-1油气田的应用

Application of offshore pressure-controlled drilling technology to Bozhong 28-1 Oil and Gas Field

李刚 李立宏 李斌 魏刚 何瑞兵 张红杰

LI Gang LI Lihong LI Bin WEI Gang HE Ruibing ZHANG Hongjie

中国海洋石油基地集团监督监理技术公司，天津　300452 中海石油中国有限公司开发生产部，天津　300452 中海石油有限公司天津分公司，天津　300452

Supervision and Technology Company of China National Offshore Oil Base Group, Tianjin 300452, China development and production department of China National Offshore Oil Base Group,Tianjin 300452, China China National Offshore Oil Base Group, Tianjin 300452, China

欠平衡钻井技术作为一项钻井新技术已在我国陆地多个油田进行了实施，然而在海洋钻井中采用欠平衡钻井技术却存在诸多风险。为了实现安全钻进、保护油气层的目的，通过研究并优化欠平衡钻井技术，提出了“海上压力控制钻井技术”,其核心技术是利用欠平衡钻井设备，采用较低的钻井液密度，通过调整井口套压达到微过平衡的目的。文中介绍了“海上压力控制钻井技术”及该技术在海上油气田的应用实例及应用该技术取得的成果，对海上油气开发中类似地层提供了一种新的钻井方式。

Unbalanced drilling technology is a new international drilling technology. It has already been used in several oilfields onshore. But there are a lot of risks to be used in offshore drilling. To ensure safe drilling and protect reservoir, through research and optimization of the unbalanced drilling technology, the “offshore pressure-controlled drilling technology” is put forward, the focus of which is to realize micro-overbalanced drilling by using unbalanced drilling equipment, lowering drilling fluid density, and adjusting the wellhead casing pressure. The “offshore pressure-controlled drilling technology”, the example of the application of the technology, and the results of the application to offshore oil and gas fields are introduced in this paper. The successful application of the technology indicates the “offshore pressure-controlled drilling technology” can be a new drilling selection for development of offshore oil and gas.