鄂尔多斯盆地马岭—镇北地区延长组长8油组沉积微相研究
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摘要
本文以沉积学、高分辨率层序地层学,测井地层学,地震地层学和油气储层地质学为理论指导,通过系统详细的岩心观察、结合测井资料的单井层序地层分析和地震解释成果,建立了研究区延长组长8油组的高分辨率层序地层格架体系及划分标准。
对研究区地层进行了详细的划分对比,按照逐级控制的方法,建立了延长组地层三级、四级、五级层序地层格架体系。以四级旋回的上升域和下降域为编图单元,建立起以长8油组为目标的,以大约30m左右的地层厚度(基本达到单砂体层次)为研究对象的新的地层分层系统。在四级层序格架内进行了五级层序的对比和划分,对长8油组的储层沉积成因微相和展布特征进行细致刻画。
从岩心描述、单井测井相和连井剖面地层对比、结合砂体的平面展布形态,分析发现研究区在长8油组主要处于三角洲前缘和前三角洲的沉积环境,主要发育有水下分流河道或水道、河口坝、前缘席状砂、浊积扇等沉积微相。水下分流河道或水道是砂体发育的有利相带,砂体粒度相对粗,分选好,杂基含量少,粒间孔隙发育且砂体规模大,是形成有利储层的基础,也是评价的有利目标。
利用自然伽玛值的大小确定主砂体带的位置,结合测井相分析等技术确定沉积相的展布。
This paper was based on sedimentology, high-resolution sequence stratigraphy, logging stratigraphy, seismic stratigraphy and reservoir geology theory, through the core that were detailed observed, combined the data of logging sequence stratigraphic analysis and seismic interpretation results, established the Chang8 in Yanchang Formation high-resolution sequence stratigraphic framework and division standards of the study area.
The study formation has been detailed contrasted, according to step by control method, establishing the Yangchang group third-order, fourth-order, fifth-order sequence stratigraphy framework. Used the up and down domain of the fourth-order cycle to map, established a new formation classification system which was aimed to detailed contrast to the effective reservoir, and the formation's thick was about 30 meters(almost attained single-sand body). Within the fourth-order sequence framework, compared and divided the fifth-order sequence, detailed depicted the reservoir sedimentary microfacies and distribution feature of Chang 8 content formations.
Through the description of the core, the single well logging facies and the connected wells' profile isochro nostratigraphic correlation, combined with the plane distribution of sand body shape, the Chang 8 is mainly in the delta front environment,we know it develops the sedimentary micro-facies of the submerged distributary channel Or water course, debouch bar, Delta front sheet sand, turbidite fan eg. The submerged distributary channel Or water course is the favorable facies,whose sand grain size is relatively coarse, well-sorted,Low matrix content,interparticle pore developed and very large.It is the basis for the formation of favorable reservoir and objective evaluation of the benefit.
Used the distribution of the GR value to determine the main river sandstone's position, combined the logging facies and other technical to determine the distribution of sedimentary facies.
对研究区地层进行了详细的划分对比,按照逐级控制的方法,建立了延长组地层三级、四级、五级层序地层格架体系。以四级旋回的上升域和下降域为编图单元,建立起以长8油组为目标的,以大约30m左右的地层厚度(基本达到单砂体层次)为研究对象的新的地层分层系统。在四级层序格架内进行了五级层序的对比和划分,对长8油组的储层沉积成因微相和展布特征进行细致刻画。
从岩心描述、单井测井相和连井剖面地层对比、结合砂体的平面展布形态,分析发现研究区在长8油组主要处于三角洲前缘和前三角洲的沉积环境,主要发育有水下分流河道或水道、河口坝、前缘席状砂、浊积扇等沉积微相。水下分流河道或水道是砂体发育的有利相带,砂体粒度相对粗,分选好,杂基含量少,粒间孔隙发育且砂体规模大,是形成有利储层的基础,也是评价的有利目标。
利用自然伽玛值的大小确定主砂体带的位置,结合测井相分析等技术确定沉积相的展布。
This paper was based on sedimentology, high-resolution sequence stratigraphy, logging stratigraphy, seismic stratigraphy and reservoir geology theory, through the core that were detailed observed, combined the data of logging sequence stratigraphic analysis and seismic interpretation results, established the Chang8 in Yanchang Formation high-resolution sequence stratigraphic framework and division standards of the study area.
The study formation has been detailed contrasted, according to step by control method, establishing the Yangchang group third-order, fourth-order, fifth-order sequence stratigraphy framework. Used the up and down domain of the fourth-order cycle to map, established a new formation classification system which was aimed to detailed contrast to the effective reservoir, and the formation's thick was about 30 meters(almost attained single-sand body). Within the fourth-order sequence framework, compared and divided the fifth-order sequence, detailed depicted the reservoir sedimentary microfacies and distribution feature of Chang 8 content formations.
Through the description of the core, the single well logging facies and the connected wells' profile isochro nostratigraphic correlation, combined with the plane distribution of sand body shape, the Chang 8 is mainly in the delta front environment,we know it develops the sedimentary micro-facies of the submerged distributary channel Or water course, debouch bar, Delta front sheet sand, turbidite fan eg. The submerged distributary channel Or water course is the favorable facies,whose sand grain size is relatively coarse, well-sorted,Low matrix content,interparticle pore developed and very large.It is the basis for the formation of favorable reservoir and objective evaluation of the benefit.
Used the distribution of the GR value to determine the main river sandstone's position, combined the logging facies and other technical to determine the distribution of sedimentary facies.
引文
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7.何义中,郑荣才,吴朝容.湖泊三角洲研究的回顾与展望[J].岩相古地理1999,19(3)：40-41.
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10.邓宏文,王红亮等.沉积物体积分配原理一高分辨率层序地层学的理论基础[J]地学前缘,2000,7(4)：305-313.
11.邓宏文,王红亮,李小孟.高分辨率层序地层对比在河流相中的应用[J].石油与天然气地质,1997,18(2)：90-95.
12.王洪亮,邓宏文.地层基准面原理在湖相储层预测中的应用[J].石油与天然气地质,1997,18(2)：96-102.
13.顾家裕.陆相盆地层序地层学格架概念及模式[J].石油勘探与开发,1995,22(4)6-10.
14.姜在兴,李华启等.层序地层学原理及应用[M].北京：石油工业出版社,19963-25.
15.席胜利等.鄂尔多斯盆地中生界石油资源及有藏的规模结构.低渗透油气田,1999,4(3).
16.覃建雄.层序地层学发展的若干重要方向[J].岩相古地理,1997,17(2)：63-70.
17.覃建雄,吴勇.层序地层学在油气勘探领域中的应用[J].天然气地球科学,1995,6(6)：1-12.
18.刘宝珺,曾允孚.岩相古地理基础和研究方法[M].北京：地质出版社,198445-57.
19.李凤杰,王多云,宋广寿等.陕甘宁盆地坳陷型湖盆缓坡带三角洲前缘短期基准面旋回与储层成因分析[J].沉积学报,2004,21(1)：73-78.
20.李凤杰,王多云,郑希民等.陕甘宁盆地华池地区延长组缓坡带三角洲前缘的微相构成[J].沉积学报,2002,20(4)：582-587.
21.郑荣才,彭军,吴朝荣.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.
22.郑荣才,尹世民,彭军.基准面旋回结构与叠加式样的沉积动力学分析[J].沉积学报,2000,18(3)：369-375.
23.郑荣才,彭军.陕北志丹三角洲长6油层组高分辨率层序分析与等时对比[J].沉积学报,2002,20(1)：92-100.
24.魏魁生,徐怀大,雷怀玉等.非海相层序地层学——以松辽盆地为例[M].北京：地质出版社,1993：
25.魏魁生,郭占谦.松辽盆地白垩系高分辨率层序地层格架[J].石油与天然气地质1997,18(1)：7-14.
26.林畅松,刘景彦,刘丽军等.高精度层序地层分析：建立沉积相和储层规模的等时地层格架[J].现代地质,2002,16(3)：276-281.
27.林畅松,张海梅,刘景彦等.高精度层序地层学和储层预测[J].地学前缘2000,7(3)：111-117.
28.傅强,李益.鄂尔多斯盆地三叠系延长组长8-长7油层组高分辨率层序地层格架及其地质意义[J].现代地质,2006,22(4)：579-584
29.王宏波,郑希民,冯明等.鄂尔多斯盆地三叠系延长组层序地层与生储盖组合特征[J].天然气地球科学,2006,17(5)：677-681
30.李思田等.鄂尔多斯盆地东部部层序地层及沉积体系分析[M].北京：地质出版社,1992.
31.曾允孚,夏文杰.沉积岩石学[M].北京：地质出版社,1986.
32.赵虹,党犇,李文厚.安塞地区延长组沉积微相研究[J].天然气地球科学,2004,15(5)：492-497.
33. Fischer A G., Bottjer D J. Orbital forcing and sedimentary sequence[J]. Jour Sediment Petrol,1991,61(7):1063-1069.
34. Brett C E, Goodman W M, Loduca S T. Sequences, cycles, and basin dynamics in the silurian of the appalachian foreland basin[J]. Geology Sedimentary,1990,69(3-4):191-244
35. Johan H V, George Postma. Astronomically forced variations in gamma-ray intensity: Late Miocene hemipelagic successions in the eastern Mediterranean basin as a test case [J]. Geology,1996,24(1):15-18
36. Posamentier H W, Weimer P. Siliciclastic sequence stratigraphy and petro leum geology where to from here [J]. AA PGBulletin,1993,77(5):731-742.
37. Cross T A. High-resolution stratigraphic correlation from the perspective of base-level cycles and sediment accommodation[C]. In:Proceedings of Northwestern European Sequence Stratigraphy Congress,1994:105-123.
38. Aitken J F, Flint S S. The application of high-resolution sequence stratigraphy to fluvial systems:a case study from the Upper Carboniferous Breathitt Group[J]. eastem Kentuck USA. Sedimentology,1995,42 (1):3-30
39. Cross T A. Stratigraphic controls on reservoir attributes in continental strata[J]. Earth Science Frontiers,2000,7(4):322-350.
40. Nelson B. Sedimentary phosphate method for estimating paleosalinites[J]. Science,1967, 158(3803):917-920.
41.李树同,王多云等.陕甘宁盆地盐池-定边地区三叠系延长统长10-长8沉积特征及油气远景分析(J).西北油气勘探,2003,4(1)：89-94.
42.李树同,王多云等.鄂尔多斯盆地姬塬地区储层砂体成因分析[J].油气地质与采收率,2005,12(6)：19-22.
43.李树同,王多云,王彬等.坳陷型湖盆缓坡边缘沉积坡折带的识别--鄂尔多斯盆地三叠纪延长期为例[J].天然气地球科学,2008,19(1)：83-88.
44.王多云,李树同,王彬等.鄂尔多斯盆地三叠纪延长期湖盆底形形态和岩性油藏分布特征[J].低渗透油气田,2006,22(4)：6-22.
45.秦红,王多云,李树同等.鄂尔多斯盆地镇北地区三叠系延长组长3油层组储层砂体成因及成藏特征研究[J].天然气地球科学,2006,17(3)：391-396
46.赵俊兴,陈洪德,向芳.高分辨率层序地层学方法在沉积前古地貌恢复中的应用[J].成都理工大学学报,2003,30(1)：76-81.
47.卢进才,李玉宏,魏仙样等.鄂尔多斯盆地三叠系延长组长7油层组油页岩沉积环境与资源潜力研究[J].吉林大学学报,2006,36(6)：928-932
2. 汪彦,彭军等.中国高分辨率层序地层学的研究现状[J].天然气地球科学,2005,16(3)：353-357.
3.杨俊杰等.中国天然气地质学卷四(鄂尔多斯盆地[M].北京：石油工业出版社,1996：257.
4.王贵文,邓清平,唐为清.测井曲线谱分析方法及其在沉积旋回研究中的应用[J]石油勘探与开发,2002,(01).
5.王英华等.沉积学及岩相古地理学新进展[M].北京：石油工业出版社,1995675-677.
6.黄志辉.地球物理测井资料在分析沉积环境中的应用[M].北京：地质出版社,1986：50-61.
7.何义中,郑荣才,吴朝容.湖泊三角洲研究的回顾与展望[J].岩相古地理1999,19(3)：40-41.
8.邓宏文.美国层序地层研究中的新学派：高分辨率层序地层学[J].石油与天然气地质,1995,16(2)：89-97.
9.邓宏文,王洪亮等.层序地层基准面的识别、对比技术及应用[J].石油与天然气地质,1996,17(3)：177-183.
10.邓宏文,王红亮等.沉积物体积分配原理一高分辨率层序地层学的理论基础[J]地学前缘,2000,7(4)：305-313.
11.邓宏文,王红亮,李小孟.高分辨率层序地层对比在河流相中的应用[J].石油与天然气地质,1997,18(2)：90-95.
12.王洪亮,邓宏文.地层基准面原理在湖相储层预测中的应用[J].石油与天然气地质,1997,18(2)：96-102.
13.顾家裕.陆相盆地层序地层学格架概念及模式[J].石油勘探与开发,1995,22(4)6-10.
14.姜在兴,李华启等.层序地层学原理及应用[M].北京：石油工业出版社,19963-25.
15.席胜利等.鄂尔多斯盆地中生界石油资源及有藏的规模结构.低渗透油气田,1999,4(3).
16.覃建雄.层序地层学发展的若干重要方向[J].岩相古地理,1997,17(2)：63-70.
17.覃建雄,吴勇.层序地层学在油气勘探领域中的应用[J].天然气地球科学,1995,6(6)：1-12.
18.刘宝珺,曾允孚.岩相古地理基础和研究方法[M].北京：地质出版社,198445-57.
19.李凤杰,王多云,宋广寿等.陕甘宁盆地坳陷型湖盆缓坡带三角洲前缘短期基准面旋回与储层成因分析[J].沉积学报,2004,21(1)：73-78.
20.李凤杰,王多云,郑希民等.陕甘宁盆地华池地区延长组缓坡带三角洲前缘的微相构成[J].沉积学报,2002,20(4)：582-587.
21.郑荣才,彭军,吴朝荣.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.
22.郑荣才,尹世民,彭军.基准面旋回结构与叠加式样的沉积动力学分析[J].沉积学报,2000,18(3)：369-375.
23.郑荣才,彭军.陕北志丹三角洲长6油层组高分辨率层序分析与等时对比[J].沉积学报,2002,20(1)：92-100.
24.魏魁生,徐怀大,雷怀玉等.非海相层序地层学——以松辽盆地为例[M].北京：地质出版社,1993：
25.魏魁生,郭占谦.松辽盆地白垩系高分辨率层序地层格架[J].石油与天然气地质1997,18(1)：7-14.
26.林畅松,刘景彦,刘丽军等.高精度层序地层分析：建立沉积相和储层规模的等时地层格架[J].现代地质,2002,16(3)：276-281.
27.林畅松,张海梅,刘景彦等.高精度层序地层学和储层预测[J].地学前缘2000,7(3)：111-117.
28.傅强,李益.鄂尔多斯盆地三叠系延长组长8-长7油层组高分辨率层序地层格架及其地质意义[J].现代地质,2006,22(4)：579-584
29.王宏波,郑希民,冯明等.鄂尔多斯盆地三叠系延长组层序地层与生储盖组合特征[J].天然气地球科学,2006,17(5)：677-681
30.李思田等.鄂尔多斯盆地东部部层序地层及沉积体系分析[M].北京：地质出版社,1992.
31.曾允孚,夏文杰.沉积岩石学[M].北京：地质出版社,1986.
32.赵虹,党犇,李文厚.安塞地区延长组沉积微相研究[J].天然气地球科学,2004,15(5)：492-497.
33. Fischer A G., Bottjer D J. Orbital forcing and sedimentary sequence[J]. Jour Sediment Petrol,1991,61(7):1063-1069.
34. Brett C E, Goodman W M, Loduca S T. Sequences, cycles, and basin dynamics in the silurian of the appalachian foreland basin[J]. Geology Sedimentary,1990,69(3-4):191-244
35. Johan H V, George Postma. Astronomically forced variations in gamma-ray intensity: Late Miocene hemipelagic successions in the eastern Mediterranean basin as a test case [J]. Geology,1996,24(1):15-18
36. Posamentier H W, Weimer P. Siliciclastic sequence stratigraphy and petro leum geology where to from here [J]. AA PGBulletin,1993,77(5):731-742.
37. Cross T A. High-resolution stratigraphic correlation from the perspective of base-level cycles and sediment accommodation[C]. In:Proceedings of Northwestern European Sequence Stratigraphy Congress,1994:105-123.
38. Aitken J F, Flint S S. The application of high-resolution sequence stratigraphy to fluvial systems:a case study from the Upper Carboniferous Breathitt Group[J]. eastem Kentuck USA. Sedimentology,1995,42 (1):3-30
39. Cross T A. Stratigraphic controls on reservoir attributes in continental strata[J]. Earth Science Frontiers,2000,7(4):322-350.
40. Nelson B. Sedimentary phosphate method for estimating paleosalinites[J]. Science,1967, 158(3803):917-920.
41.李树同,王多云等.陕甘宁盆地盐池-定边地区三叠系延长统长10-长8沉积特征及油气远景分析(J).西北油气勘探,2003,4(1)：89-94.
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