大涝坝地区巴什基奇克组隔夹层特征及分布规律  

Features and distribution of insulating layers of Bashijiqike Formation in Dalaoba area,Tarim Basin,China

作　　者：雍自权[1] 杨锁[1] 钟韬[1] 刘庆松[2] 张琳羚[3] 

机构地区：[1]成都理工大学能源学院,成都610059 [2]中国石油西南油气田分公司勘探事业部,成都610041 [3]中国石油西南油气田分公司川中油气矿勘探开发研究所,四川遂宁629000

出　　处：《成都理工大学学报（自然科学版）》2010年第1期50-54,共5页Journal of Chengdu University of Technology: Science & Technology Edition

基　　金：国家重点基础研究发展计划"973"项目(2005CB422106)

摘　　要：塔里木盆地大涝坝地区下白垩统巴什基奇克组岩性剖面存在多套隔夹层,对油气藏开发具有较大影响。通过沉积学及高分辨率层序地层学分析表明,沉积环境不同,隔夹层成因、特点和分布规律有较大的差异。浅湖环境形成的Ⅰ1型隔夹层厚度最大,连续性最好;分流间湾环境形成Ⅰ2型隔夹层及河道间环境形成的Ⅱ1型隔夹层厚度较薄,连续性差;泛滥平原环境形成的Ⅱ2型隔夹层厚度较大,连续性较好。同时,隔夹层的分布规律与其所处中长期基准面旋回背景密切相关。Ⅱ1型隔夹层分布于中长期旋回上升半旋回中下部,且一般发育于高可容纳空间的短期旋回上升半旋回的上部;Ⅰ1型、Ⅱ2型隔夹层在中长期旋回上升半旋回与下降半旋回转换处;Ⅰ2型隔夹层位于中长期旋回下降半旋回下部。在巴什基奇克组剖面上,由下至上隔夹层厚度大致由薄变厚,在中长期旋回的上升半旋回与下降半旋回转换处隔夹层厚度最大,然后向上隔夹层厚度变薄。The insulating layers existing in a lithological profile of the Formation in Tarim Basin have influence on developing features and distribution principle are different with th reservoirs. Lower Cretaceous Bashijiqike The cause of formation, the e difference of sedimentary environment according to the theory and analysis of sedimentology and high resolution sequence stratigraphy. Type Ⅰ1 insulating layers formed in shallow lakes are the best in thickness and continuity. Type Ⅰ2 and Type Ⅱ1 respectively formed in branch bays and inter-channels are inferior in thickness and continuity. Type Ⅱ2 developed in flooding plains is better in thickness and continuity. Also, the distribution principle of insulating layers is consanguineously associated with the middle-long term base level cycles where they are located. Type Ⅱ1 insulating layers are distributed over the middle- lower section of the ascending semi long middle term cycle and generally develop in the ascending semi-short term cycle in high accommodation. Type Ⅰ1 and Type Ⅱ 2 ones develop in the transfer level between the ascending and descending semi long or-middle term cycles. Type Ⅰ 2 develops in the lower section of the descending semi-middle-long term cycles. The insulating layers are getting thicker from bottom to up in the profiles of Bashijiqike Formation and are the thickest in the transfer level between the ascending and descending semi-cycles of the middle-long term base level cycles, then get thinner upwards.

关 键 词：巴什基奇克组 隔夹层 高分辨率层序地层学 分布规律 

分 类 号：TE121.3[石油与天然气工程—油气勘探]