塔中西部奥陶系鹰山组古岩溶特征及主控因素
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摘要
为明确塔中西部奥陶系鹰山组古岩溶储层发育及主控因素,总结鹰山组古岩溶特征及发育条件,划分了岩溶层组类型。在鹰山组古地貌恢复基础上,通过钻井、取心、测井等资料,分析丘状岩溶台地、上丘状岩溶缓坡地和下丘状岩溶缓坡地典型井岩溶缝洞特征。结合大量钻井资料分析了上述3类古地貌单元岩溶缝洞储层发育规律及主控因素。对岩溶缝洞储层发育深度分析表明,岩溶缝洞发育段主要在鹰山组顶面以下0～180 m,受3期海平面控制,发育多层缝洞。表层溶洞主要发育在0～50 m,泥质充填较强,测井GR值较高,溶洞规模多小于2 m。岩溶台地区岩溶缝洞形成受微地貌、水动力条件控制,以小规模溶洞、溶蚀孔洞、溶蚀裂缝为主,缝洞后期易充填。岩溶缓坡地岩溶缝洞形成受岩溶层组、水动力条件控制,以小溶蚀孔洞、溶蚀裂缝为主,后期不易充填。滨岸岩溶带及岩溶岛屿发育海水、混合水岩溶作用,溶蚀作用及冲蚀、侵蚀作用使该区域形成较大洞穴。
In order to clarify the development of karst reservoirs and the main controlling factors in the Yingshan Formation of Ordovician in the central and Western Tarim Basin, the characteristics of the development of the ancient karst fracture-cave system in the Yingshan Formation in the central and Western Tarim Basin are analyzed.Control the development of multi-layer fracture and cave system.The surface caves are mainly developed in the 0～50 m range,muddy fill,logging GR value is high,and the size of the cave is much less than 2 m.The main controlling factors include karst formation,palaeo karst landform,three stage shoreline and fault.The karst mechanism of different karst geomorphic units is analyzed.The formation of karst fracture and cave in Karst platform area is controlled by micro-geomorphology and hydrodynamic conditions.The karst fracture and cave mainly consist of small-scale karst cave, karst cave as well as karst fracture and cave,which are easy to fill in the later stage of fracture and cave.The karst cave is mainly composed of small dissolution pores and corrosion cracks,and is not easy to fill in later stage. Coastal karst zone and karst islands develop seawater karstification and mixed water karstification. The karstification,erosion and erosion make the area easy to form larger caves.
In order to clarify the development of karst reservoirs and the main controlling factors in the Yingshan Formation of Ordovician in the central and Western Tarim Basin, the characteristics of the development of the ancient karst fracture-cave system in the Yingshan Formation in the central and Western Tarim Basin are analyzed.Control the development of multi-layer fracture and cave system.The surface caves are mainly developed in the 0～50 m range,muddy fill,logging GR value is high,and the size of the cave is much less than 2 m.The main controlling factors include karst formation,palaeo karst landform,three stage shoreline and fault.The karst mechanism of different karst geomorphic units is analyzed.The formation of karst fracture and cave in Karst platform area is controlled by micro-geomorphology and hydrodynamic conditions.The karst fracture and cave mainly consist of small-scale karst cave, karst cave as well as karst fracture and cave,which are easy to fill in the later stage of fracture and cave.The karst cave is mainly composed of small dissolution pores and corrosion cracks,and is not easy to fill in later stage. Coastal karst zone and karst islands develop seawater karstification and mixed water karstification. The karstification,erosion and erosion make the area easy to form larger caves.
引文
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[11]吉云刚,韩剑发,张正红,等.塔里木盆地塔中北斜坡奥陶系鹰山组深部优质岩溶储层的形成与分布[J].地质学报,2012,86(7):1163-1174.
[12]焦存礼,何碧竹,邢秀娟,等.塔中地区奥陶系加里东中期Ⅰ幕古岩溶特征及控制因素研究[J].中国石油勘探,2010,15(1):21-26+2+1.
[13]耿晓洁,林畅松,吴斌.古地貌对塔中地区鹰山组岩溶结构及分布的控制作用[J].岩性油气藏,2018,30(4):46-55.
[14]张黎,马中远,丁辉,等.塔中地区卡塔克隆起奥陶系油气运聚规律分析[J].断块油气田,2015,22(1):11-15.
[15]罗春树,杨海军,李江海,等.塔中奥陶系优质储集层特征及断裂控制作用[J].石油勘探与开发,2011,38(6):716-724.
[16]邓兴梁,张庆玉,梁彬,等.塔中Ⅱ区奥陶系鹰山组岩溶古地貌恢复方法研究[J].中国岩溶,2015,34(2):154-158.
[2]马中远,杨红彩,朱秀香,等.塔中顺西地区奥陶系油气藏特征及成藏主控因素[J].新疆地质,2015,33(4):498-503.
[3]伊硕,黄文辉,万欢.塔里木盆地奥陶系碳酸盐岩古岩溶差异分析[J].东北石油大学学报,2018,42(1):1-13+121.
[4]傅恒,韩建辉,孟万斌,等.塔里木盆地塔中北坡奥陶系碳酸盐岩岩溶储层的形成机理[J].天然气工业,2017,37(3):25-36.
[5]张庆玉,梁彬,淡永,等.塔中北斜坡奥陶系鹰山组岩溶储层特征及古岩溶发育模式[J].中国岩溶,2016,35(1):106-113.
[6]张艳萍,吕修祥,于红枫,等.塔中隆起两组走滑断裂对岩溶储层发育的控制机制[J].石油与天然气地质,2016,37(5):663-673.
[7]王招明,张丽娟,孙崇浩.塔里木盆地奥陶系碳酸盐岩岩溶分类、期次及勘探思路[J].古地理学报,2015,17(5):635-644.
[8]郑剑,王振宇,杨海军,等.塔中地区奥陶系鹰山组埋藏岩溶期次及其对储层的贡献[J].现代地质,2015,29(3):665-674.
[9]熊润,王振宇,张云峰.塔中地区奥陶系埋藏岩溶形成机理及其主控因素[J].重庆科技学院学报(自然科学版),2013,15(6):14-17.
[10]谢欣睿,毛健,王振宇.塔中北斜坡奥陶系鹰山组岩溶作用与储层分布[J].断块油气田,2013,20(3):324-328.
[11]吉云刚,韩剑发,张正红,等.塔里木盆地塔中北斜坡奥陶系鹰山组深部优质岩溶储层的形成与分布[J].地质学报,2012,86(7):1163-1174.
[12]焦存礼,何碧竹,邢秀娟,等.塔中地区奥陶系加里东中期Ⅰ幕古岩溶特征及控制因素研究[J].中国石油勘探,2010,15(1):21-26+2+1.
[13]耿晓洁,林畅松,吴斌.古地貌对塔中地区鹰山组岩溶结构及分布的控制作用[J].岩性油气藏,2018,30(4):46-55.
[14]张黎,马中远,丁辉,等.塔中地区卡塔克隆起奥陶系油气运聚规律分析[J].断块油气田,2015,22(1):11-15.
[15]罗春树,杨海军,李江海,等.塔中奥陶系优质储集层特征及断裂控制作用[J].石油勘探与开发,2011,38(6):716-724.
[16]邓兴梁,张庆玉,梁彬,等.塔中Ⅱ区奥陶系鹰山组岩溶古地貌恢复方法研究[J].中国岩溶,2015,34(2):154-158.