断层古侧向封闭性定量评价方法及其应用  

A quantitative evaluation method for ancient lateral sealing of fault

作　　者：付广[1] 杨勉[1] 吕延防[1] 史集建[1] 

机构地区：[1]东北石油大学地球科学学院黑龙江省油气藏形成机理与资源评价重点实验室黑龙江大庆163318

出　　处：《石油学报》2013年第S01期78-83,共6页Acta Petrolei Sinica

基　　金：国家重大科技专项“中国大型气田形成条件、富集规律及目标评价(二期)”(2011ZX05007)资助

摘　　要：根据断层侧向封闭机理,以综合考虑断层岩压实成岩压力和压实成岩时间而建立的断层岩现今排替压力计算方法为基础,结合古埋深恢复和断层活动性评价等技术,建立了油气成藏关键时期的断层古侧向封闭性定量评价方法,并利用该方法对海拉尔盆地贝尔凹陷B29断裂在油气成藏期的古侧向封闭性进行了定量评价。结果表明,除了8号储层外,其余储层该断层现今和在油气成藏期(伊敏组沉积末期)侧向上均是封闭的。该评价结果与目前贝302井钻探结果有着较好的吻合关系,表明该方法用于断层古侧向封闭能力评价是可行的。According to lateral sealing mechanism of fault, this study establishes a quantitative evaluation method for ancient lateral sealing of fault in the key stage of hydrocarbon accumulation with a calculation method for present displacement pressure of fault rocks that considers compaction diagenetic pressure and time of fault rocks, and with a combination of techniques for recovery of ancient burial depth and evaluation of fault activity. The method is applied to a quantitative evaluation of ancient lateral sealing of fault B29 at the stage of hydrocarbon accumulation in Beier sag, Hailaer Basin. Results show that in fault B29 , reservoirs （except res- ervoir No. 8）are presently sealed,and reservoirs （except reservoirs No. 8）were sealed laterally in the stage of hydrocarbon accumula tion （end of deposition of Yimin Formation）. The evaluation result is consistent with drilling result of Well Bei-302 in the study area. Thus, the proposed method is applicable for evaluating ancient lateral sealing of fault.

关 键 词：断层 古侧向封闭性 断层岩 排替压力 压实成岩埋深 定量评价 

分 类 号：TE112[石油与天然气工程—油气勘探]