准噶尔盆地永进地区侏罗系红层成因
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摘要
准噶尔盆地永进地区侏罗系和白垩系之间普遍存在一套以红色为主的砂泥岩地层,其层位归属和成因争议较大。利用地震区域追踪对比、连井标定和砂层组精细对比、岩心观察、粘土矿物、微量元素和化学蚀变指数等多种方法对该层进行了综合研究。研究结果表明,红层层位属中侏罗统西山窑组,主要是沉积作用形成的,红层是半干旱—半潮湿气候条件下的陆上—滨湖浅水环境的产物,而后期的风化作用较小。在该环境下,碎屑岩储层不含炭屑,增强了在成岩过程中的抗压实性,为永进地区6 000m深度依然存在相对高孔渗储层创造了条件,提高了勘探前景的评价,为该区有利储层的评价与预测提供了依据。
A set of sand-mudstone formation,mainly in red color,is commonly found between Jurassic and Cretaceous strata in Yongjin area,Junggar Basin.Its stratigraphic horizon ownership and genesis are greatly disputed.A comprehensive research to the red beds has been carried out including seismic regional tracing contrast,connecting-well calibration,fine correlation of sand group,core observation,clay mineral,trace elements and chemical index of alteration,etc.The results show that,it is in the Jurassic Xishanyao formation formed by sedimentation, which was the products of onshore-shallow lakeshore in semiarid-semi-humid condition,while later weathering was little.Because the clastic reservoir has no charcoal fragment under this environment,its anti - compaction was enhanced during the process of diagenesis.So high porosity and permeability reservoirs also exist under the depth of 600m in Yongjin area.This may provide more profitable exploration prospect, and lots of basis for the evaluation and prediction of favorable reservoir.
A set of sand-mudstone formation,mainly in red color,is commonly found between Jurassic and Cretaceous strata in Yongjin area,Junggar Basin.Its stratigraphic horizon ownership and genesis are greatly disputed.A comprehensive research to the red beds has been carried out including seismic regional tracing contrast,connecting-well calibration,fine correlation of sand group,core observation,clay mineral,trace elements and chemical index of alteration,etc.The results show that,it is in the Jurassic Xishanyao formation formed by sedimentation, which was the products of onshore-shallow lakeshore in semiarid-semi-humid condition,while later weathering was little.Because the clastic reservoir has no charcoal fragment under this environment,its anti - compaction was enhanced during the process of diagenesis.So high porosity and permeability reservoirs also exist under the depth of 600m in Yongjin area.This may provide more profitable exploration prospect, and lots of basis for the evaluation and prediction of favorable reservoir.
引文
[1]徐常胜.杨梦云.陆梁隆起西部油气成藏剖析及隐蔽油气藏战略突破口选择.新疆油田公司勘探开发研究院,2002.
[1]徐常胜,王斌,杨梦云,等.准噶尔盆地腹部白垩系底界划分[J].新疆石油地质,2005,26(3):278-279.
[2]谢寅符,李洪奇,孙中春.准噶尔盆地石南地区侏罗系—白垩系间风化壳的发现及其地层学意义[J].地质论评,2006,52 (1):137-144.
[3]刘得光,凌云,畅召,等.石南21井区头屯河组高钙砂岩的成因及其意义[J].新疆石油地质,2006,26(2):170-171.
[4]李茂榕,周洪瑞,王训练,等.准噶尔盆地南缘郝家沟剖面下侏罗统八道湾组辫状河三角洲沉积[J].油气地质与采收率, 2007,14(3):41-45.
[5]朱强,毕彩芹.陆相地层精细对比方法及应注意的问题[J].油气地质与采收率,2002,9(3):27-30.
[6]王桐,姜在兴,张元福,等.罗家地区古近系沙河街组水进型扇三角洲沉积特征[J].油气地质与采收率,2008,15(1):47-49.
[7]汤艳杰,贾建业,谢先德.粘土矿物的环境意义[J].地学前缘, 2002,9(2):337-341.
[8]鲁春霞.粘土矿物在古环境中的应用[J].中国沙漠,1997,17 (4):456-460.
[9]蓝先洪.粘土矿物作为古气候指标矿物的探讨[J].地质科技情报,1990,9(4):31-35.
[10]陈涛,王河锦,张祖青,等.浅谈利用粘土矿物重建古气候[J].北京大学学报:自然科学版,2005,41(2):309-314.
[11]纪友亮,冷胜荣.东濮地区风化壳储层特征及油气藏的形成[J].石油大学学报:自然科学版,1994,18(3):12-18.
[12]De Oliveira M T,Formoso M L L,Trescases J J,et al.Clay mineral facies and lateritization in basalts of the southeastern Parana basin, Brazil[J].Journal of South American Earth Sciences,1998,11 (4):365 -377.
[13]刘文彬.陕甘宁盆地泥质岩氧化物的比值及其古气候意义[J].地球科学进展,1993,8(6):57-62.
[14]王随继,黄杏珍,妥进才,等.泌阳凹陷核桃园组微量元素演化特征及其古气候意义[J].沉积学报,1997,15(1):65-69.
[15]Nesbitt H W,Young G M.Early Proterozoic climates and plate motion inferred from major element chemistry of lutites[J].Nature, 1982,(299):715 -717.
[16]张义杰,齐雪峰,程显胜,等.中国北方侏罗系(Ⅲ)新疆地层区[M].北京:石油工业出版社,2003.
[17]赵景波.风化淋滤带地质新理论—CaCO_3淀积深度理论[J].沉积学报,2000,18(1):29-35.
[1]徐常胜,王斌,杨梦云,等.准噶尔盆地腹部白垩系底界划分[J].新疆石油地质,2005,26(3):278-279.
[2]谢寅符,李洪奇,孙中春.准噶尔盆地石南地区侏罗系—白垩系间风化壳的发现及其地层学意义[J].地质论评,2006,52 (1):137-144.
[3]刘得光,凌云,畅召,等.石南21井区头屯河组高钙砂岩的成因及其意义[J].新疆石油地质,2006,26(2):170-171.
[4]李茂榕,周洪瑞,王训练,等.准噶尔盆地南缘郝家沟剖面下侏罗统八道湾组辫状河三角洲沉积[J].油气地质与采收率, 2007,14(3):41-45.
[5]朱强,毕彩芹.陆相地层精细对比方法及应注意的问题[J].油气地质与采收率,2002,9(3):27-30.
[6]王桐,姜在兴,张元福,等.罗家地区古近系沙河街组水进型扇三角洲沉积特征[J].油气地质与采收率,2008,15(1):47-49.
[7]汤艳杰,贾建业,谢先德.粘土矿物的环境意义[J].地学前缘, 2002,9(2):337-341.
[8]鲁春霞.粘土矿物在古环境中的应用[J].中国沙漠,1997,17 (4):456-460.
[9]蓝先洪.粘土矿物作为古气候指标矿物的探讨[J].地质科技情报,1990,9(4):31-35.
[10]陈涛,王河锦,张祖青,等.浅谈利用粘土矿物重建古气候[J].北京大学学报:自然科学版,2005,41(2):309-314.
[11]纪友亮,冷胜荣.东濮地区风化壳储层特征及油气藏的形成[J].石油大学学报:自然科学版,1994,18(3):12-18.
[12]De Oliveira M T,Formoso M L L,Trescases J J,et al.Clay mineral facies and lateritization in basalts of the southeastern Parana basin, Brazil[J].Journal of South American Earth Sciences,1998,11 (4):365 -377.
[13]刘文彬.陕甘宁盆地泥质岩氧化物的比值及其古气候意义[J].地球科学进展,1993,8(6):57-62.
[14]王随继,黄杏珍,妥进才,等.泌阳凹陷核桃园组微量元素演化特征及其古气候意义[J].沉积学报,1997,15(1):65-69.
[15]Nesbitt H W,Young G M.Early Proterozoic climates and plate motion inferred from major element chemistry of lutites[J].Nature, 1982,(299):715 -717.
[16]张义杰,齐雪峰,程显胜,等.中国北方侏罗系(Ⅲ)新疆地层区[M].北京:石油工业出版社,2003.
[17]赵景波.风化淋滤带地质新理论—CaCO_3淀积深度理论[J].沉积学报,2000,18(1):29-35.
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