北大港潜山奥陶系碳酸盐岩储集层发育的主控因素及其分布规律
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摘要
北大港潜山奥陶系储集层主要为碳酸盐岩岩溶储集层.探索岩溶储集层形成的控制因素与储集层分布规律.对潜山油气勘探具有重要意义。通过对岩溶储集层的形成机理及其发育模式研究.认为储集层的发育主要受控干构造作用、岩性与沉积环境以及表生期岩溶作用等因素。储集层分布在平面上取决于岩溶古地貌和断裂走向.岩溶斜坡和岩溶洼地处储集层较为发育.裂缝和断层发育的部位特别是大断层两侧最有利于岩溶储集层发育;纵向上受岩性和风化壳发育程度控制.白云岩和膏岩层段易溶蚀.有利于储集层发育.距风化壳顶面距离越近.储集层发育程度越高.该区有利储集层主要发育在风化壳以下50~250m范围内。
Ordovician reservoirs in Beidagang buried hill are mainly carbonate karst reservoirs,exploration of controlling factors of karst reservoir forming and reservoir distribution laws has important implications for oil and gas exploration of buried hills.Through the research on the mechanisms of karst reservoirs and their growing modes,the authors considered that the development of reservoirs was mainly controlled by tectonic action,lithology and depositional environment and supergene karstification and other factors.Reservoir distribution on the plane depends on karst palaeogeomorphology and fracture trend,reservoirs at the karst slopes and karst depressions are developed,the developed sites of fractures,faults,especially both sides of major fault,are most favorable to karst reservoir development.Reservoir distribution was longitudinally controlled by lithology and development degree of weathering crust,dolomite and gypsum rock strata are easy corrosion and conducive to reservoir developing,the closer to the top surface of the weathering crust,the higher degree of reservoir develops,favorable reservoirs mainly developed within 50 — 250 m under weathering crust.
Ordovician reservoirs in Beidagang buried hill are mainly carbonate karst reservoirs,exploration of controlling factors of karst reservoir forming and reservoir distribution laws has important implications for oil and gas exploration of buried hills.Through the research on the mechanisms of karst reservoirs and their growing modes,the authors considered that the development of reservoirs was mainly controlled by tectonic action,lithology and depositional environment and supergene karstification and other factors.Reservoir distribution on the plane depends on karst palaeogeomorphology and fracture trend,reservoirs at the karst slopes and karst depressions are developed,the developed sites of fractures,faults,especially both sides of major fault,are most favorable to karst reservoir development.Reservoir distribution was longitudinally controlled by lithology and development degree of weathering crust,dolomite and gypsum rock strata are easy corrosion and conducive to reservoir developing,the closer to the top surface of the weathering crust,the higher degree of reservoir develops,favorable reservoirs mainly developed within 50 — 250 m under weathering crust.
引文
[1]金振奎,邹元荣,蒋春雷,等.大港探区奥陶系岩溶储集层发育分布控制因素[J].沉积学报,2001,19(4):530-535.
[2]金振奎,冯增昭.华北地台东部下古生界白云岩岩石学及储集特征[J].沉积学报,1993,11(2):11-18.
[3]冯增昭,陈继新,吴胜和.华北地台早古生代岩相古地理[J].沉积学报,1991,9(4):15-55.
[4]邹元荣,金振奎,由伟丰,等.黄骅坳陷奥陶纪岩相古地理[J].古地理学报,2001,3(4):3-44.
[5]付立新,杨池银,肖敦清.大港千米桥潜山储集层形成对油气分布的控制[J].海相油气地质,2007,12(2):33-38.
[6]吴永平,杨池银.渤海湾盆地北部奥陶系潜山[M].北京:石油工业出版社,2002.
[7]李振宏,郑聪斌.鄂尔多斯盆地东部奥陶系储集层特征及控制因素[J].天然气地球科学,2004,15(6):604-609.
[8]马文璞.区域构造解析[M].北京:地质出版社,1992:168-195.
[9]李建英,卢刚臣,孔凡东,等.千米桥潜山奥陶系储集层特征及孔隙演化[J].石油与天然气地质,2001,22(4):367-371.
[2]金振奎,冯增昭.华北地台东部下古生界白云岩岩石学及储集特征[J].沉积学报,1993,11(2):11-18.
[3]冯增昭,陈继新,吴胜和.华北地台早古生代岩相古地理[J].沉积学报,1991,9(4):15-55.
[4]邹元荣,金振奎,由伟丰,等.黄骅坳陷奥陶纪岩相古地理[J].古地理学报,2001,3(4):3-44.
[5]付立新,杨池银,肖敦清.大港千米桥潜山储集层形成对油气分布的控制[J].海相油气地质,2007,12(2):33-38.
[6]吴永平,杨池银.渤海湾盆地北部奥陶系潜山[M].北京:石油工业出版社,2002.
[7]李振宏,郑聪斌.鄂尔多斯盆地东部奥陶系储集层特征及控制因素[J].天然气地球科学,2004,15(6):604-609.
[8]马文璞.区域构造解析[M].北京:地质出版社,1992:168-195.
[9]李建英,卢刚臣,孔凡东,等.千米桥潜山奥陶系储集层特征及孔隙演化[J].石油与天然气地质,2001,22(4):367-371.