渤海某油田复杂地质条件下井身结构设计及应用
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摘要
渤海某油田地质条件复杂,影响钻井安全的地质风险因素主要有四方面:断层、浅部非目的层气、欠压层、超压层。对于不同地质风险因素共存的情况,本文分析了钻井方案应对措施,设计了一套针对不同地质风险共存条件下的井身结构设计策略。该井身结构设计策略在渤海海上钻井作业中实际应用效果良好,能够保障钻井作业安全顺利,满足井筒完整性的要求,为复杂地质条件下的钻井方案设计提供了一套可靠的井身结构设计策略。
The geological environment of an oilfield in Bohai bay is complex. There are four geological risk factors which affecting drilling safety, fault, shallow gas, underpressure layer and overpressure layer. For the coexistence of different geological risk factors, this paper analyzes the countermeasures of drilling plan in details, and recommends well structure strategies for different geological risks coexistence conditions. The recommended well structure strategies behave good application effect in Bohai oilfield offshore drilling operation. Drilling can ensure safe and meet the wellbore integrity requirements with well structure mentioned above. This paper recommends reliable well structure design strategies for different geological risks coexistence conditions.
The geological environment of an oilfield in Bohai bay is complex. There are four geological risk factors which affecting drilling safety, fault, shallow gas, underpressure layer and overpressure layer. For the coexistence of different geological risk factors, this paper analyzes the countermeasures of drilling plan in details, and recommends well structure strategies for different geological risks coexistence conditions. The recommended well structure strategies behave good application effect in Bohai oilfield offshore drilling operation. Drilling can ensure safe and meet the wellbore integrity requirements with well structure mentioned above. This paper recommends reliable well structure design strategies for different geological risks coexistence conditions.
引文
[1]《海洋钻井手册》编委会.海洋钻井手册[M].北京:石油工业出版社,2011.
[2]胜亚楠,管志川,张国辉,等.基于钻前风险预测的井身结构优化方法[J].石油钻采工艺,2016,38(4):415-421.
[3]侯喜茹,柳贡慧,仲文旭.井身结构设计必封点综合确定方法研究[J].石油大学学报,2005,29(4):52-55.
[4]刘小刚,崔治军,陶林,杨进,吴占民,周波.渤海油田科学探索井井身结构优化设计[J].断块油气田,2011,18(5):663-665.
[5]方长传.海上深探井井身结构优化设计[J].石油天然气学报,2013,35(8):100-102.
[2]胜亚楠,管志川,张国辉,等.基于钻前风险预测的井身结构优化方法[J].石油钻采工艺,2016,38(4):415-421.
[3]侯喜茹,柳贡慧,仲文旭.井身结构设计必封点综合确定方法研究[J].石油大学学报,2005,29(4):52-55.
[4]刘小刚,崔治军,陶林,杨进,吴占民,周波.渤海油田科学探索井井身结构优化设计[J].断块油气田,2011,18(5):663-665.
[5]方长传.海上深探井井身结构优化设计[J].石油天然气学报,2013,35(8):100-102.