中拐地区T_2k_2高分辨率层序地层研究
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摘要
综合应用钻井、测井和地震资料,对准噶尔盆地中拐地区克拉玛依上亚组(T2k2)进行高分辨率层序地层学研究,根据微相相序叠加样式与界面特征,共识别出12个短期基准面旋回;在短期基准面旋回识别的基础上,共识别出3个中期基准面旋回和1个长期基准面旋回,并详细分析了各个级次的基准面旋回发育的特征。依据等时地层对比法则对研究区中期基准面旋回进行连井对比,建立等时地层对比格架,在等时地层格架下对砂体进行对比,提高了砂体对比的精度,并通过分析确定层序格架内的砂体发育特征与基准面旋回存在密切联系。
High-resolution sequence stratigraphy is studied for upper Karamay formation (T2k2) in Zhongguai area of Junggar Basin by integrated application of drilling, logging and seismic data. Totally 12 short-term base level cycles are recognized according to microfacies sequence stacking pattern and interface characteristics; and 3 medium-term and 1 long-term base level cycles are recognized based on the recognition of short-term base level cycles. The characteristics of each base level cycle are analyzed in detail. Cross-well correlation has been conducted for the medium-term base level cycles in the study area to build an isochronous stratigraphic correlation framework for conducting sands correlation and improving correlation accuracy. It is concluded that there exists a close relationship between sand development and base level cycle within the stratigraphic framework.
High-resolution sequence stratigraphy is studied for upper Karamay formation (T2k2) in Zhongguai area of Junggar Basin by integrated application of drilling, logging and seismic data. Totally 12 short-term base level cycles are recognized according to microfacies sequence stacking pattern and interface characteristics; and 3 medium-term and 1 long-term base level cycles are recognized based on the recognition of short-term base level cycles. The characteristics of each base level cycle are analyzed in detail. Cross-well correlation has been conducted for the medium-term base level cycles in the study area to build an isochronous stratigraphic correlation framework for conducting sands correlation and improving correlation accuracy. It is concluded that there exists a close relationship between sand development and base level cycle within the stratigraphic framework.
引文
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[2]邓宏文,王洪亮,李熙喆.层序地层地层基准面的识别、对比技术及应用[J].石油与天然气地质,1996,17(3):177~184.
[3]邓宏文,吴海波,王宁,等.河流相层序地层划分方法——以松辽盆地下白垩统扶余油层为例[J].石油与天然气地质,2007,28(5):621~627.
[4]郑荣才,彭军,吴朝容.陆相盆地基准面旋回的级次划分和研究意义[J].沉积学报,2001,19(2):249~255.
[5]李君文,陈洪德,田景春,等.塔巴庙区块山西组高分辨率层序地层学研究[J].油气地质与采收率,2005,12(5):1~5.
[6]于红枫,王英民,李雪,等.东营凹陷八面河地区沙河街组第四段高分辨率层序地层[J].成都理工大学学报(自然科学版),2005,32(5):486~491.
[7]邓宏文,王洪亮,祝永军,等.高分辨率层序地层学—原理及应用[M].北京:地质出版社,2002:1~24.
[8]王居峰,蔡希源,邓宏文,等.准噶尔盆地腹部侏罗系高分辨率层序地层特征[J].石油学报,2006,27(2):16~19.
[9]淡卫东,张昌民,尹太举,等.川西白马庙气田上侏罗统蓬莱镇组高分辨率层序地层对比[J].沉积学报,2007,25(5):708~715.
[10]宋小勇,林畅松,阳孝法.博兴洼陷沙四上亚段高精度层序格架研究[J].特种油气藏,2006,13(5):32~35.
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