CAJ | 학술논문

断层是车排子地区油气运移的主要通道，也能形成与之相关的油气藏，断层封闭性的研究对于确定研究区油气藏的空间分布有着极为重要的意义。通过定性分析断层活动期与生排烃期的匹配关系以及断层特征，定量评价断层两盘岩性配置关系、泥岩涂抹及断面正应力等控制封闭性能的各个要素，对车排子凸起东北部F1和F2两条主要断层进行封闭性分析，最终应用模糊评价方法进行综合评判。结果表明：F1断层和F2断层封闭性具有“纵向上分期，平面上分段”的变化特征，纵向上分为白垩系、新近系沙湾组一段、沙湾组二段和沙湾组三段4期。其中，白垩系断层封闭性平面上整体好，仅F2断层的南段封闭性差；沙一段地层F1断层的封闭性具有北段好、中段差、南段较好-较差的变化特征，F2断层封闭性整体差-较差；沙二段地层断层封闭性整体好；沙三段地层断层封闭性整体差，仅F2断层中段封闭性好。
단층시차배자지구유기운이적주요통도，야능형성여지상관적유기장，단층봉폐성적연구대우학정연구구유기장적공간분포유착겁위중요적의의。통과정성분석단층활동기여생배경기적필배관계이급단층특정，정량평개단층량반암성배치관계、니암도말급단면정응력등공제봉폐성능적각개요소，대차배자철기동북부F1화F2량조주요단층진행봉폐성분석，최종응용모호평개방법진행종합평판。결과표명：F1단층화F2단층봉폐성구유“종향상분기，평면상분단”적변화특정，종향상분위백성계、신근계사만조일단、사만조이단화사만조삼단4기。기중，백성계단층봉폐성평면상정체호，부F2단층적남단봉폐성차；사일단지층F1단층적봉폐성구유북단호、중단차、남단교호-교차적변화특정，F2단층봉폐성정체차-교차；사이단지층단층봉폐성정체호；사삼단지층단층봉폐성정체차，부F2단층중단봉폐성호。
Faults are the main oil-gas migration pathways in Chepaizi area and can also form associated hydrocarbon re-servoirs,thus research on fault sealing ability is of great significance for confirming spatial distribution of reservoirs in the study area .Through qualitative analysis of fault characteristics and the timing between faulting and hydrocarbon genera -tion and expulsion ,and quantitative evaluation of factors controlling sealing ability such as juxtaposition of lithology ,shale smear,and normal stress on fault surface ,we studied the sealing ability of two major faults ( F1 and F2) in northeastern Chepaizi Uplift ,and performed comprehensive judgment by using fuzzy evaluation method .The results show that the sea-ling abilities of F1 and F2 feature in ‘vertical periods and lateral segmentation ’.Vertically,the fault sealing ability can be divided into periods ,including Cretaceous ( K) ,the first member of Neogene Shawan Fm ( N1 s1 ) ,2 nd member of Neo-gene Shawan Fm ( N1 s2 ) ,and 3 rd member of Neogene Shawan Fm ( N1 s3 ) .The sealing ability of faults in Cretaceous is good as a whole except for the southern segment of F 2.For N1 s1 ,sealing ability of F1 is good in the northern segment , poor in the middle segment , and good to poor in the southern segment , while that of F2 is poor to fair as a whole .For N1 s2 ,fault sealing abilities are good as a whole .For N1 s3 ,fault sealing abilities are poor as a whole ,except for the middle segment of F2 whose sealing ability is good .