跃进二号油田下干柴沟组下段Ⅰ-11号小层河口坝增生体的精细表征  

Fine characterization of accreting body of mouth bar in Ⅰ-11 sublayer at lower member of Lower Gancaigou Formation in Yuejin Ⅱ Oilfield

作　　者：牟中海[1] 廖春 丁晓军 陈袁[1] 于跃[1] 

机构地区：[1]西南石油大学地球科学与技术学院,四川成都610500 [2]中国石油青海油田分公司,甘肃敦煌736202

出　　处：《岩性油气藏》2014年第6期8-14,共7页Lithologic Reservoirs

基　　金：中国石油天然气股份有限公司重大科技专项"柴达木盆地老区稳产提高采收率技术研究"(编号:2011E-0306)资助

摘　　要：根据测井及地质资料,应用储层构型分析法,对柴达木盆地跃进二号油田下干柴沟组下段Ⅰ-11号小层河口坝进行了精细分析。研究认为,下干柴沟组下段Ⅰ-11号小层存在2个河口坝、2种构型单元及5个河口坝增生体。河口坝顶底界受限于以隔层为识别标志的5级界面,河口坝增生体之间则为以泥岩夹层为识别标志的4级界面。对构型单元空间组合类型的研究表明,在垂直物源方向上,存在河口坝与河口坝的拼接、河口坝与席状砂的拼接及河口坝的侧积3种类型;在平行物源方向上,存在河口坝的前积和河口坝的退积2种类型;在纵向上,构型单元之间可见加积正旋回和加积反旋回特征,构型单元内主要表现为反韵律,其次是正韵律特征。在上述研究的基础上,编绘了5个河口坝增生体的平面分布图。This paper analyzed the mouth bar in the E3^1 Ⅰ -11 sublayer in Yuejin Ⅱ Oilfield of Qaidam Basin by using well logging, geological data and application configuration analysis. The research suggests that there developed two mouth bars, two kinds of configuration units and five accreting bodies in the E3^1 Ⅰ -11 sublayer. Mouth bar is limited by restraining barrier as the identification of fifth interface, between aeereting bodies is mudstone interlayer as the identification of fourth interface. According to the research of the configuration units combination in space, splicing between two mouth bars, mouth bar and sheet bar splicing, and mouth bar lateral accretions exist in the direction vertical to the source, and mouth bar progradation and retrogradation exist in the direction parallel to the source. There are aggradation-positive cycle and aggradation-reverse cycle between configuration units on the vertical. Reverse rhyme is the main characteristic in configuration unit, followed by positive rhythm. On the basis of the above research, the plane distribution map of five aeereting bodies was completed.

关 键 词：河口坝 河口坝增生体 构型单元 空间组合类型 跃进二号油田 

分 类 号：TE122.2[石油与天然气工程—油气勘探]