浅层气防治技术在渤海A油田的应用

Prevention and Control Technology of Shallow Gas Applied to A Oilfield

在勘探开发过程中,浅层气对于钻井作业危害极大,目前如何有效封固浅层气井段,防止次生灾害是国内外石油界的一个技术难题。渤海油田有较多的区块都存在浅层气,渤中区域最为典型。前期采用常规固井工艺封固浅层气难以满足封固要求,由此引起浅层气的泄漏带来经济损失和钻井工程风险。针对浅层气防治问题,从钻井工艺、固井方式和水泥类型优选、辅助措施等方面进行改进,创新引入树脂水泥浆体系,形成一套适合渤海湾浅层气的封固技术,在渤中A油田成功应用,保证钻井作业安全同时取得较大经济效益。

In the process of exploration and development, shallow gas does great harm to drilling operations. Currently, how to effectively seal the shallow well section to prevent secondary disasters, is a technical problem in petroleum industry both at home and abroad. There are shallow gas in many blocks in Bohai oilfield, and the most typical one in Bozhong area. The conventional cementing cementing of shallow gas is difficult to meet the sealing requirements, resulting in the leakage of shallow gas to bring economic loss and drilling engineering risk. Aiming at the problem of shallow gas prevention and control, this paper improves drilling technology, cementing method, cement type optimization and auxiliary measures, innovatively introduces resin cement slurry system, and forms a set of sealing technology suitable for shallow gas in Bohai bay, which has been successfully applied in Bozhong A oilfield to ensure drilling operation safety and to achieve greater economic benefits.