车排子凸起西翼艾卡断裂带现今及成藏期封闭性评价  

Current and historical sealing ability of Aika Fault Belt in west wing of Chepaizi Uplift

作　　者：郄润芝 姚爱国[2] 吴孔友[1] 李菁 

机构地区：[1]中国石油大学(华东)地球科学与技术学院,山东青岛266580 [2]新疆油田公司勘探开发研究院,新疆克拉玛依834000

出　　处：《能源与环保》2017年第8期67-72,共6页CHINA ENERGY AND ENVIRONMENTAL PROTECTION

基　　金：国家自然科学基金(41272142);山东省自然科学基金(ZR2012DM011)

摘　　要：断裂既能输导油气,又能形成圈闭控制油气成藏,具有遮挡和通道的双重作用,因此评价断裂的封闭性对于确定油气的空间分布具有重要的意义。利用测井、录井、高精度地震数据体等基础资料,通过分析断层活动期与成藏期的匹配关系,利用平衡剖面技术对剖面上的构造进行几何学、运动学恢复,定量计算断层两盘泥质充填、泥岩涂抹、断面正应力和紧闭指数等参数,再利用模糊综合评价方法对艾卡断裂现今及成藏期封闭性进行综合评价。认为由于成藏期断面埋深浅,断面所受正应力较小,岩石变形作用弱,断裂带紧闭程度低,泥岩层涂抹、充填作用不明显,导致断裂成藏期断裂的封闭性一般小于现今的封闭性。并且由于断裂上盘和下盘之间岩性相似,泥岩涂抹和充填作用差别相对较小,封闭性变化趋势具有一致性。Fault can promote or stop the oil from migrating depending on its sealing ability,so the estimation on fault sealing ability is very important to oil exploration.Based on the seismic and well logging data,and the relationship of fault-forming and pool-forming period,using the technique of balanced cross section to rebuild history structure,to calculate factors of Rm,SGR,IFT and F,then using the method of fuzzy evaluation to evaluate the fault sealing ability of Aika Fault Belt in the west wing of Chepaizi Uplift.During reservoir-forming stage,the pressure on the fault surface is relatively low,rock deformation effects are not strong enough to close the fault belt and also resulted into the low shale smear and filling effects,so fault sealing ability during reservoir-forming stage is lower than present as a whole.And because of the similar lithology,shale smear and filling effects are of little difference between hanging wall and footwall,which result into the similar fault sealing ability.

关 键 词：车排子凸起西翼 艾卡断裂带 平衡剖面 成藏期 封闭性 

分 类 号：P618.3[天文地球—矿床学]