鄂尔多斯盆地周缘及外围盆地矿权空白区有利拓展方向研究  

Study on the favorable expansion orientation of mining rights blank zones in the peripheral Ordos Basin and surrounding basins

作　　者：程建[1] 周小进[1] 王萍[1] 曹清古[1] 余琪祥[1] 李凤丽[1] Cheng Jian;Zhou Xiaojin;Wang Ping;Cao Qinggu;Yu Qixiang;Li Fengli(Wuxi Research Institute of Petroleum Geology,Petroleum Exploration and Production Research Institute,Sinopec)

机构地区：[1]中国石化石油勘探开发研究院无锡石油地质研究所

出　　处：《中国石油勘探》2023年第6期90-104,共15页China Petroleum Exploration

基　　金：中国石化油田部科研专项“中石化油气探矿权战略选区与竞标策略分析”(YTBXD-KQCL-2022-1-02-001-SKY)。

摘　　要：鄂尔多斯盆地及外围的河套、银川、六盘山、渭河等盆地具有多类型资源同盆共生的特点,在中国陆上大盆地中有明显的资源优势,但资源探明程度低,且存在大量矿权空白区,是油公司选区评价及未来拓展矿权与资源空间的重要目标。通过跟踪勘探新发现,总结地质新认识,类比矿权空白区与其相邻探区成藏条件与资源潜力后发现,鄂尔多斯盆地东缘中段的万镇地区上古生界煤层、暗色泥岩厚度大,生烃强度高,且构造背景稳定,上古生界致密气与深层煤层气具有勘探潜力;盆地北缘杭锦旗、东胜地区石炭系—二叠系煤层残留厚度大,埋深适中,是煤层气与煤化工的有利地区;盆地西缘中—上奥陶统发育广海陆棚相泥页岩,烃源基础好,已发现多个以乌拉力克组(平凉组)为主力烃源岩的台缘礁滩或裂缝型油气藏,结合保存条件研究,认为西缘石沟驿向斜、陶乐断阶带是勘探下古生界碳酸盐岩、海相页岩油气的有利区。外围盆地中以河套盆地临河坳陷最为有利,下白垩统固阳组、渐新统临河组两套优质烃源岩覆盖临河坳陷大部分地区,生烃势能强,围绕主力的生烃凹陷淖西洼槽,东南断阶带发育多组深切的走滑断层,通源性良好,高效成藏模式已经得到证实;六盘山盆地发育与鄂尔多斯盆地相似的三叠系、侏罗系烃源岩,生烃条件好,盆地深层值得进一步探索;银川盆地钻井发现了清水营组咸化湖相烃源岩和含油构造,盆地北部成熟生烃凹陷周缘构造带是有利勘探方向;渭河盆地、河套盆地呼和坳陷处在经济发达区,钻井见到丰富的水溶氦气、地热能、生物气显示,这些地区的油气共伴生资源可作为常规油气的补充进行综合勘探,实现资源就地转化与综合利用。通过研究,建议在鄂尔多斯盆地万镇、合阳、杭锦旗—准格尔旗、陶乐断阶带、石沟驿向斜,以及六盘山盆地海原—�Ordos Basin and its surrounding basins such as Hetao,Yinchuan,Liupanshan,and Weihe are characterized by coexistence of multiple types of resources in one basin,and they have prominent resource advantages in China’s large onshore basins.However,the degree of resource exploration is low,and there are a large number of mining rights blank zones,which are the major targets for favorable area screening and mining rights and resource space expansion of oil companies in the future.After analyzing new discoveries,summarizing new geological understanding,and correlating hydrocarbon accumulation conditions and resource potential in mining rights blank zones with the adjacent exploration areas,the study results indicate that:(1)The Upper Paleozoic coal seams and dark mudstone have a large thickness and high hydrocarbon generation intensity,and the structural settings are stable in Wanzhen area in the middle section of the eastern basin margin,showing exploration potential of tight gas and deep coalbed methane in the Upper Paleozoic.(2)The Carboniferous-Permian coal seams have a large residual thickness and moderate burial depth in Hangjinqi and Dongsheng areas in the northern basin margin,which are favorable areas for coalbed methane and coal chemical industry.(3)The continental shelf facies shale was developed in the Middle-Late Ordovician in the western basin margin,with a wide area and good hydrocarbon source conditions.Multiple platform marginal reef or fractured type oil and gas reservoirs mainly supplied by source rock in Ulalik Formation(Pingliang Formation)have been discovered.Based on the study of preservation conditions,it is believed that Shigouyi syncline and Taole fault terrace zone in the western basin margin are favorable areas for discovering the Lower Paleozoic carbonate and marine shale oil and gas reservoirs.(4)Among the surrounding basins,Linhe Depression in Hetao Basin is the most favorable exploration area.Two sets of high-quality source rocks were deposited in the Lower Cretaceous Guyang Formation a

关 键 词：鄂尔多斯盆地 河套盆地 六盘山盆地 银川盆地 渭河盆地 油气矿权 油气矿权空白区 矿权拓展 

分 类 号：TE121[石油与天然气工程—油气勘探]