塔河南部志留系柯坪塔格组层序地层及沉积相
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摘要
依据岩芯、露头、测井和地震资料,将塔河南地区志留系柯坪塔格组划分为SQ1、SQ2两个三级层序,主要为障壁滨海—浅海沉积体系。层序SQ1低位体系域(SQ1–LST)发育于柯坪塔格组下段,主要为中潮坪(混合坪)沉积,海侵体系域(SQ1–TST)发育于柯坪塔格组中段,主要为浅海陆棚沉积,高位体系域不发育;层序SQ2仅保留低位体系域(SQ2–LST),发育于柯坪塔格组上段,主要为低潮坪(砂坪)沉积。在此基础上,编制了塔河地区南部志留系柯坪塔格组不同体系域的沉积相平面分布图,为该区储层预测提供了依据。
Well S112-2 drilled in the south of Tahe Oilfield found commercial oil accumulation in the SilurianKepingtage Formation.Based on the crops,logging and seismic data,the Kepingtage Formation is divided intotwo third-sequences.The Silurian in the south of Tahe Oilfield develops coastal-offshore sediments with barriers.Accordingly,the Lower Member of the Kepingtage Formation corresponds to lower land systems tracts of SQ1(SQ1-LST),which mainly develops middle tidal flat(mixed flat)sediments;the Middle Member of the KepingtageFormation corresponds to transgressive systems tracts of SQ1(SQ1-TST),forming the offshore continental shelfsediments;the Upper Member of the Kepingtage Formation corresponds to the lower land systems tracts of SQ2(SQ2-LST),which forms primarily the lower tidal flat(sand flat)sediments.In the south of Tahe Oilfield,thestudy also compiles sedimentary subfacies distribution maps of the above three system tracts of the Silurian,whichprovides the basis for further reservoir prediction in the area.
Well S112-2 drilled in the south of Tahe Oilfield found commercial oil accumulation in the SilurianKepingtage Formation.Based on the crops,logging and seismic data,the Kepingtage Formation is divided intotwo third-sequences.The Silurian in the south of Tahe Oilfield develops coastal-offshore sediments with barriers.Accordingly,the Lower Member of the Kepingtage Formation corresponds to lower land systems tracts of SQ1(SQ1-LST),which mainly develops middle tidal flat(mixed flat)sediments;the Middle Member of the KepingtageFormation corresponds to transgressive systems tracts of SQ1(SQ1-TST),forming the offshore continental shelfsediments;the Upper Member of the Kepingtage Formation corresponds to the lower land systems tracts of SQ2(SQ2-LST),which forms primarily the lower tidal flat(sand flat)sediments.In the south of Tahe Oilfield,thestudy also compiles sedimentary subfacies distribution maps of the above three system tracts of the Silurian,whichprovides the basis for further reservoir prediction in the area.
引文
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[11]李玉胜,谢传礼,邓兴梁,等.英买34、35井区志留系柯坪塔格组储层特征及其控制因素[J],中国地质,2009,36(5):1087–1098.
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[2]郭建军,陈践发.塔中志留系沥青砂岩的地质特征及研究进展[J].新疆石油地质,2006,27(2):151–155.
[3]宋建国,吴震权.关于塔里木台盆区志留系油气勘探的几点思考以塔中地区为例[J].石油勘探与开发,2004,31(5):127–129.
[4]杨海军,邬光辉,孙丽霞,等.塔中北斜坡志留系岩性油藏形成条件与勘探方向[J].新疆石油地质,2007,28(3):286–288.
[5]丁勇,王允诚,徐明军.塔河油田志留系成藏条件分析[J].石油实验地质,2005,27(3):232–237.
[6]金晓辉,闫相宾,张哨楠,等.塔里木盆地志留系成藏条件与勘探方向探讨[J].西安石油大学学报:自然科学版,2006,21(2):1–4.
[7]陈元壮,王毅,张达景,等.塔里木盆地塔河地区南部志留系油气成藏特征[J].石油实验地质,2008,30(1):32–36,46.
[8]郭长敏.塔里木盆地志留系柯坪塔格组沉积相及平面展布[J].天然气技术,2008,2(1):19–22,31.
[9]谢俊,张金亮,梁会珍,等.塔里木盆地志留系柯坪塔格组沉积相与沉积模式研究[J].西安石油大学学报:自然科学版,2008,23(2):1–5.
[10]张金亮,戴朝强.塔里木盆地志留系高分辨率层序地层格架研究[J].中国海洋大学学报:自然科学版,2006,36(6):901–907.
[11]李玉胜,谢传礼,邓兴梁,等.英买34、35井区志留系柯坪塔格组储层特征及其控制因素[J],中国地质,2009,36(5):1087–1098.
[12]张鑫,张金亮,覃利娟.塔里木盆地志留系柯坪塔格组砂岩岩石学特征与物源分析[J].矿物岩石,2007,27(3):106–115.
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