WZ12-1油田流沙港组一段异常高压预测  

Prediction and analysis of abnormal high pressure reservoir in the first member of Liushagang formation in south WZ12-1 oilfield

作　　者：曹园[1] 邓金根[1] 蔚宝华[1] 

机构地区：[1]中国石油大学,北京102249

出　　处：《特种油气藏》2013年第6期99-101,146,共3页Special Oil & Gas Reservoirs

基　　金：国家自然科学基金项目"泥页岩井壁坍塌的力学化学耦合研究"(51174219);国家自然科学基金创新研究群体项目"复杂油气井钻井与完井基础研究"(51221003);国家科技重大专项"复杂结构井优化设计与控制关键技术"(2011ZX05009-005)

摘　　要：WZ12-1油田南部流沙港组一段地层存在的异常高压易导致钻井过程中的井喷发生。为确保施工安全,需对该区的地层压力特征做全面分析。对比Eaton法和Bowers法计算的该区地层压力值,优选Bowers法用于该区的孔隙压力预测;对声波时差与密度交会图研究后得出,流一段异常高压是由非欠压实原因导致;对流一段地质特征和岩性进行分析,判断出该段异常高压产生原因为生烃作用和泥岩矿物转化。该项研究结果对于WZ12-1油田安全钻井及顺利开发具有重要意义。Abnormal high pressure in the first member of Liushagang formation in south WZ12-1 oilfield tends to lead to well blowout during drilling. Holistic approach to formation pressure is necessary to ensure operation safety. Formation pressures calculated by Eaton and Bowers methods are compared,and the Bowers method is used to predict pore pressure; the cross-plot of interval transit time and density indicates that the reason for abnormal high pressure is non-undercompaction; and analysis of the geology and lithology in this formation demonstrates that the reasons for abnormal high pressure are hydrocarbon generation and clay mineral transformation. The research results are helpful to safe drilling and successful development of WZ12-1 oilfield.

关 键 词：WZ12-1油田南部流沙港组一段 异常高压 压力预测 Bowers法 生烃作用 矿物转化 

分 类 号：TE319[石油与天然气工程—油气田开发工程]