摘要
泌阳凹陷断裂复杂、断块多,寻找含油气圈闭的关键是搞清楚断层位置和断块形态。泌阳凹陷断裂发育,构造倾角变化大,叠前偏移技术比叠后偏移技术能更清晰、更准确的反映构造形态。叠前偏移技术在这一复杂断裂区的应用可以明显改善偏移成像效果,断点清楚、断层清晰,能够准确地落实断层位置和认识断块之间的关系,与钻井资料的吻合程度较高,取得了明显的地质效果。同时研究出了一套以速度迭代为核心、地质信息为约束的求取偏移速度场的方法,提高了偏移速度的精度。
Biyang depression is characterized by developed complex fractures and multiple faulted-blocks. The key issue on looking for oil-bearing traps is to make clear the fault position and faulted-block form. Compared with post-stack migration technology, pre-stack migration technology can better and accurately reflect the structural feature. The application results indicate it can improve migration image effect and make sure the relation between fault position and faulted-blocks, which has a high degree of in line with the drilling data and has achieved obviously good geological effect. At the same time, a method centered on velocity convergence and constrained by geological message has been worked out, improving the accuracy of migration velocity.
出处
《石油地质与工程》
CAS
2012年第1期16-18,6,共4页
Petroleum Geology and Engineering
关键词
泌阳凹陷
叠前偏移
复杂断块
偏移速度
偏移参数
Biyang depression
pre-stack migration
complex faulted-block
migration velocity
migration parameters
