海上压力控制钻井技术在渤中28-1油气田的应用

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。

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

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.