构造裂缝发育期次划分方法研究与应用——以海拉尔盆地布达特群为例  

Classification Methods for Development Period of Fractures and Its Application: a case study from Budate Group of Hailaer Basin

作　　者：任丽华[1] 林承焰[1] 

机构地区：[1]中国石油大学地球资源与信息学院,山东东营257061

出　　处：《沉积学报》2007年第2期253-260,共8页Acta Sedimentologica Sinica

基　　金：国家973项目(编号:G1999022508);教育部第二届高校青年教师奖奖励基金;中国石油大庆油田有限责任公司科技攻关项目(合同编号:41100366)的联合资助。

摘　　要：以海拉尔盆地苏德尔特构造带布达特群古潜山油藏裂缝性储层为例,对构造裂缝发育期次的划分方法进行了探讨;在大量岩心观察的基础上,结合区域构造演化史,综合采用裂缝充填物的同位素分析、包裹体测温和岩石声发射技术等,分析了裂缝的形成期次.研究认为布达特群主要存在三期构造破裂：第Ⅰ期裂缝的形成与南屯末-大磨拐河组沉积时期的构造运动有关,缝内以方解石充填为主,形成温度介于72～76℃之间,并见有烃类包裹体,但其成熟度较低.第Ⅱ期裂缝是在伊敏时期区域伸展作用下形成的,又细分为两个亚期,第一亚期裂缝以方解石充填为主,方解石形成温度介于117～132℃之间,是深埋高温环境下的产物;第二亚期裂缝以微-细晶石英充填为主,其形成温度介于120～154℃之间.相对来讲,第Ⅱ期烃类成熟度明显增强.第Ⅲ期裂缝是在伊敏末期强烈的抬升作用下形成的,裂缝内充填了微-细晶方解石和石英.其形成温度介于89～110℃之间,烃类成熟度减弱.裂缝发育期次划分对于恢复裂缝发育演化历史具有重要意义.Taking fractured reservoir of Budate Group in the buried hill of Sudeerte structural zone, Hailaer basin as an example, this paper discusses classification methods for development period of fractures. Based on the core observation and description, the stable isotopic analysis, fluid inclusion homogenization temperature of in-filled components in fractures and acoustic emission technology, and combined with regional structural evolution history, the development period of fractures is researched. The result indicates about three stages of structural break occur in Budate Group. The fractures activity in stage Ⅰ relates to Nantun-Damoguaihe movement. The fractures are filled by mainly caleite, of which the tbrming temperature is between 72 and 76 degrees. In this stage, hydrocarbon inclusions are found but their maturity is low. The fractures of stage Ⅱ are the result of regional extension movement of Yimin phase. Stage Ⅱ is subdivided into two stages. In the first stage, fractures are filled by calcite, of which the forming temperature is between 117 and 132 degrees. In the second stage, fractures are filled by microcrystalline-aplite quartz, which forming temperature is between 120 and 154 degrees. Relatively, the hydrocarbon maturity of stage Ⅱ boosts up in evidence. The fractures of stage Ⅲ come into being in violent uplift movement of Yimin telophase. The fillings of fractures are microcrystalline-aplite calcite and quartz, of which the forming temperature is between 89 and 110 degrees. The hydrocarbon maturity weakens. It is significant for rebuilding evolution history fractures to classify the development period of fractures.

关 键 词：裂缝发育期次 研究方法 稳定同位素分析 流体包裹体 声发射技术 

分 类 号：TE122.2[石油与天然气工程—油气勘探]