Confirmation and distribution features of effective source rocks in Yinger Sag, Jiuquan Basin
-
摘要: 基于烃源岩生排烃基本原理,利用TOC含量与热解S1,氯仿沥青"A"含量的关系确定了营尔凹陷下白垩统主要层段有效烃源岩的有机碳含量下限值,其中下沟组有效烃源岩的TOC含量下限值为0.8%,赤金堡组为0.6%。与单井的测井TOC含量预测成果相结合,识别并统计了单井有效烃源岩厚度,最终综合层序地层学和沉积相研究成果确定了主要层段有效烃源岩的展布特征。各层段的有效烃源岩均比较发育,其中以赤金堡组厚度最大,其次为下沟组上段。下沟组下段厚度总体偏低,但北部次凹有效源岩厚度最大亦可达250 m,南部次凹最大为200 m。Abstract: Based on the basic theory of hydrocarbon generation and expulsion of source rock, TOC content, pyrolysis parameter S1 and chloroform bitumen "A" content have been correlated to confirm the lowest limit of TOC content of effective source rocks from the Lower Cretaceous in the Yinger Sag. The lowest limit of TOC content of effective source rocks from the Xiagou Formation is 0.8%, while that from the Chijinbu Formation is 0.6%. Combining with the prediction from TOC content by single well logging, the thickness of effective source rock in single well has been calculated. The distribution of effective source rock in main layers has been confirmed combining the studies of sequence stratigraphy and sedimentology. Effective source rocks are well-developed in each layer, among which those in the Chijinbu Formation have the biggest thickness, and the Upper Xiagou Formation the second. In the Lower Xiagou Formation, effective source rocks are thin; however, they may increase to 250 m thick in the northern subsag, and 200 m thick in the southern subsag.
-
Key words:
- lowest limit of TOC content /
- effective source rock /
- lower Cretaceous /
- Yinger Sag /
- Jiuquan Basin
-
[1] 陈建平,黄第藩,霍永录,等.酒东盆地营尔凹陷油气生成与运移聚集[J].石油勘探与开发,1995,22(6):1-7. [2] 潘良云,谢结来,李明杰,等.酒泉盆地白垩纪—新生代区域构造演化与油气勘探[J].石油与天然气地质,2006,27(1):62-69. [3] 娄占伟,潘良云,张宏伟,等.甘肃酒泉盆地营尔凹陷层序地层特征与岩性勘探目标[J].现代地质,2005,19(4):563-569. [4] 韩永科,刘永昌,岳智忠,等.酒泉盆地营尔凹陷长沙岭构造带油气勘探前景[J].新疆石油地质,2003,24(6):490-493. [5] 赵鹏,陈世加,李丽萍,等.酒东盆地营尔凹陷下白垩统油源对比[J].天然气地球科学,2006,17(2):192-195. [6] 任战利,刘池阳,张小会,等.酒东盆地热演化史与油气关系研究[J].沉积学报,2000,18(4):619-623. [7] 李文厚,周立发,赵文智,等.酒东盆地营尔凹陷的扇三角洲[J].石油与天然气地质,1997,18(4):300-304. [8] 韩永科,张莉,韩小松,等.营尔凹陷原油族群划分及勘探意义[J].新疆石油地质,2007,28(2):146-149. [9] 马立元,程克明,熊英,等.营尔凹陷原油生物标志物特征及油源对比[J].新疆石油地质,2006,27(1):32-34. [10] 金强.有效烃源岩的重要性及其研究[J].油气地质与采收率,2001,8(1):1-4. [11] 张彩明,杜学斌.陆相湖盆有效烃源岩识别及其石油地质意义[J].青海石油,2008,26(2):5-10. [12] 刘若冰,田景春,魏志宏,等.川东南地区震旦系—志留系下组合有效烃源岩综合研究[J].天然气地球科学,2006,17(6):824-828. [13] Peters K E,Cassa M R.Applied source rock geochemistry[M]//Magoon L B,Dow W G,eds.The petroleum system:from source to trap,AAPG memoir 60.Tulsa:AAPG,1994:93-117. [14] 饶丹,章平澜,邱蕴玉.有效烃源岩下限指标初探[J].石油实验地质,2003,25(S):378-381. [15] 李志明,关德范,徐旭辉,等.有效泥质油源岩有机碳丰度评价标准研究:以东营凹陷为例[J].石油实验地质,2009,31(4):379-384. [16] 高岗,柳广弟,付金华,等.确定有效烃源岩有机质丰度下限的一种新方法[J].西安石油大学学报:自然科学版,2012,27(2):22-27. [17] 霍秋立,曾花森,张晓畅,等,松辽盆地北部青山口组一段有效烃源岩评价图版的建立及意义[J].石油学报,2012,33(3):379-384. [18] 祝厚勤,刘平兰,庞雄奇,等.生烃潜力法研究烃源岩排烃特征的原理及应用[J].中国石油勘探,2008,13(3):5-10. [19] 陈中红,查明.烃源岩排烃作用研究现状及展望[J].地球科学进展,2005,20(4):459-466. [20] 王贵文,朱振宇,朱广宇.烃源岩测井识别与评价方法研究[J].石油勘探与开发,2002,29(4):50-52.
计量
- 文章访问数: 1402
- HTML全文浏览量: 51
- PDF下载量: 783
- 被引次数: 0