苏里格气田召30区块高分辨率层序地层旋回划分与对比方法  

Division and Contrast Method of High Resolution Sequence Stratigraphic Cycles in Zhao30 Block of Sulige Gasfield

作　　者：徐文[1] 刘鹏程[1] 于占海[1] 李存磊[2] XU Wen;LIU Pengcheng;YU Zhanhai;LI Cunlei(Research Institute of Exploration and Development,Changqing Oilfield Company,Xi'an 710018,Shaanxi,China;College of Petroleum Engineering,Liaoning Shihua University,Fushun 113001,Liaoning,China)

机构地区：[1]长庆油田分公司勘探开发研究院,陕西西安710018 [2]辽宁石油化工大学石油天然气工程学院,辽宁抚顺113001

出　　处：《西安石油大学学报（自然科学版）》2020年第1期28-33,41,共7页Journal of Xi’an Shiyou University（Natural Science Edition）

基　　金：辽宁省“兴辽英才计划”项目“砂砾岩油藏滚动增储与油气随钻检测关键技术研究”(XLYC1807129)

摘　　要：针对苏里格气田召30区块河流相储层标志层缺乏、砂体叠置、掘蚀严重、难以精细等时对比的难点,从高分辨率层序地层学基准面变化原理出发,在剖析关键取芯井的基础上,通过测井数据最大熵谱分析、小波分析和多曲线融合方法,对研究区进行了单砂体级别的层序识别与对比。结果表明:测井数据最大熵谱分析及小波变换分析的综合运用能够实现不同级次基准面旋回结构类型和叠加样式的识别与对比,据此,将研究区山1段(S 1)—盒1段(H 1)地层划分为3个长期基准面旋回层序、10个中期基准面旋回层序。其中,气层段(S 1-H 8S段)可识别出3个中期旋回和16个短期基准面旋回。在旋回识别与对比的基础上,结合多曲线融合技术提取标志层,实现了单砂体级别的地层对比,在一定程度上解决了河流相储层砂体空间变换复杂、短期旋回对比困难的问题,提高了等时对比的可靠性。Aiming at the difficulties existing in the comparison of fluvial reservoirs in Sulige gas field Zhao 30 block,such as lack of marker layers,serious superposition and excavation of sand bodies,and difficult to make precise isochronal comparison,based on the datum level change principle of high resolution sequence stratigraphy and the analysis of key coring wells,the sequence recognition and correlation of the study area in single sand-body level are carried out by means of maximum entropy spectrum analysis,wavelet analysis and multi-curve fusion of logging data.The results show that to comprehensively use maximum entropy spectrum analysis and wavelet transform analysis of logging data can realize the recognition and comparison of structure types and superposing patterns of base-level cycles with different levels.The stratum of Shan1 member(S 1)-He 1 member(H 1)in the study area is divided into three long-term base-level cycles and ten medium-term base-level cycles.Among them,three medium-term base-level cycles and 16 short-term base-level cycles can be identified in the gas reservoir(S 1-H 8S).On the basis of cycle recognition and comparison,the marker layers are extracted by multi-curve fusion technology,and the stratigraphic correlation in single sand-body level is realized.To a certain extent,the problems of complex spatial transformation of sand body in fluvial reservoir and difficult correlation of short-term cycles are solved,and the reliability of isochronal correlation is improved.

关 键 词：层序地层 旋回对比 小波分析 多曲线融合 苏里格气田 

分 类 号：TE122.2[石油与天然气工程—油气勘探]