| 鄂尔多斯盆地乌审旗古隆起对岩溶气藏的控制机理 |
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| 引用本文： | 何发岐,张威,丁晓琪,祁壮壮,李春堂,孙涵静. 鄂尔多斯盆地乌审旗古隆起对岩溶气藏的控制机理[J]. 石油与天然气地质, 2023, 44(2): 276-291. DOI: 10.11743/ogg20230203 |
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| 作者姓名： | 何发岐 张威 丁晓琪 祁壮壮 李春堂 孙涵静 |
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| 作者单位： | 1.中国石化 华北油气分公司，河南 郑州 4500062.成都理工大学 能源学院，四川 成都 610059 |
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| 基金项目： | 国家科技重大专项(2017ZX05005-001-010);中国石化科技攻关项目(P20043-2) |
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| 摘 要： | 随着鄂尔多斯盆地北部中国石化大牛地区块一系列深井的钻探成功，发现乌审旗古隆起对奥陶系马家沟组的成藏起着重要的控制作用。在充分利用盆地北部钻井、地震和分析化验资料的基础上，研究乌审旗古隆起的形成与演化对下古生界成储和成藏的控制作用。结果表明：(1)乌审旗古隆起形成于新元古代，一直持续活动到奥陶纪末，具有“水上、水下交替发育”的特点，可分为5个演化阶段；(2)乌审旗古隆起在早古生代的持续活动造成了其东侧断裂系统发育，这些断裂为加里东期—海西期马家沟组岩溶作用提供了通道，形成深层岩溶储层；(3)乌审旗古隆起上沉积水体较浅，利于微生物岩的形成和准同生白云石化，可以形成白云岩孔隙型储层；(4)乌审旗古隆起东侧的断裂是成藏期天然气运移的主要通道，断裂沟通了多套储层，具有“三向供烃、断裂控储、立体成藏”的特征。该研究为鄂尔多斯盆地下古生界奥陶系的立体勘探提供了一种新模式。
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| 关 键 词： | 白云岩 储集体 古隆起 岩溶气藏 马家沟组 奥陶系 大牛地 鄂尔多斯盆地 |
| 收稿时间： | 2022-09-20 |
Controlling mechanism of Wushenqi paleo-uplift on paleo-karst gas reservoirs in Ordos Basin |
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| Faqi HE,Wei ZHANG,Xiaoqi DING,Zhuangzhuang QI,Chuntang LI,Hanjing SUN. Controlling mechanism of Wushenqi paleo-uplift on paleo-karst gas reservoirs in Ordos Basin[J]. Oil & Gas Geology, 2023, 44(2): 276-291. DOI: 10.11743/ogg20230203 |
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| Authors: | Faqi HE Wei ZHANG Xiaoqi DING Zhuangzhuang QI Chuntang LI Hanjing SUN |
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| Affiliation: | 1.Huabei Oil and Gas Company，SINOPEC，Zhengzhou，Henan 4500002.College of Energy，Chengdu University of Technology，Chengdu，Sichuan 610059 |
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| Abstract: | It’s found that the Wushenqi paleo-uplift has a significant impact on controlling the hydrocarbon accumulation of the Ordovician Majiagou Formation in the northern Ordos Basin with a batch of deep wells successfully drilled in Da’niudi gas field there. The study makes full use of the drilling， seismic and laboratory data from the northern part of the basin to discuss the controlling effects of the paleo-uplift on reservoir forming and hydrocarbon accumulation in the Lower Paleozoic. The results are shown as follows. First， the Wushenqi paleo-uplift was formed in the Late Proterozoic and continued to be active until the end of the Ordovician. It underwent five stages of evolution featuring alternated development above and under water. Second， the continuous activities during the Early Paleozoic resulted in the development of fault system to the east of the paleo-uplift， which served as fluid channels for the confined aquifer karstification during the Caledon and Hercynian periods. Deep karst reservoirs were developed thereby. Third， the sedimentary water body on the paleo-uplift was shallow， favorable for the deposition of microbial rocks and enecontemporaneous dolomitization， and prone to generate porous dolomite reservoirs. Fourth， the faults to the east of the paleo-uplift acted as major passages for natural gas migration during accumulation. Multiple reservoirs get connected by these faults， featuring “hydrocarbon charging from three directions， fault-controlled reservoir formation and multi-layered hydrocarbon accumulation”. The study is of a new model to the exploration of the Lower Paleozoic and Ordovician in the Ordos Basin. |
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| Keywords: | dolomite reservoir paleo-uplift karst gas reservoir Majiagou Formation Ordovician Da’niudi gas field Ordos Basin |
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